CA1198822A - Gasoline station system for enablement of selected pumps by a credit card console located at the pump island - Google Patents
Gasoline station system for enablement of selected pumps by a credit card console located at the pump islandInfo
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- CA1198822A CA1198822A CA000418471A CA418471A CA1198822A CA 1198822 A CA1198822 A CA 1198822A CA 000418471 A CA000418471 A CA 000418471A CA 418471 A CA418471 A CA 418471A CA 1198822 A CA1198822 A CA 1198822A
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Abstract
ABSTRACT
A system for use in a gasoline station, for auto-matic enablement of fuel dispensing means from the fuel island by a customer credit card, comprising credit card reader means, customer-operable keyboard means, display means, output channel means, and first processor control means, together with attendant control means for use by the attendant of the gas station, the attendant control means being manually operable by the attendant for enabl-ing a selected fuel dispensing means, thereby providing an indication to the attendant of the value of dispensed fuel made by the customer.
A system for use in a gasoline station, for auto-matic enablement of fuel dispensing means from the fuel island by a customer credit card, comprising credit card reader means, customer-operable keyboard means, display means, output channel means, and first processor control means, together with attendant control means for use by the attendant of the gas station, the attendant control means being manually operable by the attendant for enabl-ing a selected fuel dispensing means, thereby providing an indication to the attendant of the value of dispensed fuel made by the customer.
Description
8~32~
BAC KG ROU N D OF TH I NVENT I ON
The present invention relates to a customer controlled terminal for enablement of a selected fuel dispenser, and more particularly relates to a customer console which communicates with an attendant-controlled terminal located within the sales office of the gasoline station.
Heretofore, equipment has been provided in service stations which permit the remote enablement of gasoline dispensers by an attendant-controlled terminal. The terminal is located in the sales 10 office of the service station remote from the islands containing pump dispensers. Such a terminal prevents theft of gasoline by allowing only the attendant to enable fuel dispensing pumps.
A fully automated vending apparatus for the dispensement of fuel, is described in U.S. Patent No. 3,786,421 issued to W. Wostl on January 15, 1974. The Wostl '421 device provides a step for~vard in the art, eliminating the service station attendant altogether by permitting self-vending of the fuel and self-payment by the customer.
The Wostl '421 devi~e, however, is not capable of handling the sales of goods which cannot be automatically dispensecl and, therefore, does 20 not create a transactional receipt for the purchased goods.
Wostl and others thereafter invented other apparatus in order to provide an automated credit card transaction in a vehicle service station which not only speeds Up sale transaction but permits the use of an attendant on duty in order to reduce the likelihood of error and fraud . U . S. Patent No. 4,199,100, Wostl et. al ., discloses a terminal apparatus which monitors a plurality of fuel di~pensers for selectively retrieving fuel sales information to be automatically combined with miscellaneous sales information in the form of a printed receipt by simple command from the attendant. This second generation ~88~;~
Wostl device resulted in a step forward in the art providing service station attendant interplay with automated service station functions.
Where a service station includes a terminal apparatus at a central location which is operated by an attendant, the customer parks his car at the pump islands and pumps gas into his vehicle from a normally enabled pump. The customer then walks to the central location for payment by credit card or cash. By permitting the pumps to remain normally enabled at the many islands of the service station, a single attendant is unable to prevent "drive-offs" in which a car pulls 10 to a remote pump, the tank is fueled by the driver and the driver merely drives away without paying.
in order to prevent such drive-offs, some service stations require the customer to walk in to the central location and make pre-payment for gasoline, either by cash or credit card before the attendant will enable the pump. After making pre-payment, the customer must then ~alk back to the pump island and dispense gasoline.
After the dispensing is completed, the customer must then return to the central location to complete the sales transaction by picking up his cash receipt or signing the credit card receipt. It would 20 therefore be highly desirable to provide apparatus which still permits use of a centrally located terminal apparatus and at the same time eliminates the necessity for the customer to make two trips to the centralized location in order to prevent drive-offs.
SUMMARY OF THE INVENTION
lt is therefore an object of this invention to automate credit card transactions in a vehicle service static>n in order to speed up sales transastion and reduce the likelihood of gasoline theft by drive-offs.
~L9~l~22 A system according to the present invention includes a centrally located terminal apparatus which monitors at least one, and preferably, a plurality of fuel dispensers for selective retrieval of fuel sales information. The central terminal apparatus communicates with the attendant on duty permitting the attendant to selectively enable any one of the island pumps.
A remote customer-controlled console located at a gasoline dispensing island communicates with the central terminal in order to permit a customer to provide "collateral" by way of credit card to instruct enablement of the selected pump by the customer at a location remote from the central terminal apparatus. A remote customer-controlled console includes a credit card reader which obtains credit card information in order to verify the credit status of the card the customer is using for collateral. A keyboard and display device are included on the customer console for permitting the customer to select an individual pump for enablement.
Ç~RIEF DESCRIPTION OF THE DRAWING~
Fig. 1 is a perspective view of a gasoline service station incorporating the system of the present invention;
Fig. 2 is a perspective view of an attendant-controlled terminal of the system of Fig. l;
Fig. 3 is a perspective view of a customer-controlled console of the system of Fig. l;
Fig. ~ illustrates a conventional microcomputer forming the process and control system of the terminal of Fig. 2;
Fig. 5 is a block diagram illustration of the customer-controlled consol~ of Fig. 3 and the attendant-controlled terminal of Fig. 2;
Figs. 6 and ~ are flow charts illustrating the basic control sequence executed by the circuitry of Fig. 5.
BAC KG ROU N D OF TH I NVENT I ON
The present invention relates to a customer controlled terminal for enablement of a selected fuel dispenser, and more particularly relates to a customer console which communicates with an attendant-controlled terminal located within the sales office of the gasoline station.
Heretofore, equipment has been provided in service stations which permit the remote enablement of gasoline dispensers by an attendant-controlled terminal. The terminal is located in the sales 10 office of the service station remote from the islands containing pump dispensers. Such a terminal prevents theft of gasoline by allowing only the attendant to enable fuel dispensing pumps.
A fully automated vending apparatus for the dispensement of fuel, is described in U.S. Patent No. 3,786,421 issued to W. Wostl on January 15, 1974. The Wostl '421 device provides a step for~vard in the art, eliminating the service station attendant altogether by permitting self-vending of the fuel and self-payment by the customer.
The Wostl '421 devi~e, however, is not capable of handling the sales of goods which cannot be automatically dispensecl and, therefore, does 20 not create a transactional receipt for the purchased goods.
Wostl and others thereafter invented other apparatus in order to provide an automated credit card transaction in a vehicle service station which not only speeds Up sale transaction but permits the use of an attendant on duty in order to reduce the likelihood of error and fraud . U . S. Patent No. 4,199,100, Wostl et. al ., discloses a terminal apparatus which monitors a plurality of fuel di~pensers for selectively retrieving fuel sales information to be automatically combined with miscellaneous sales information in the form of a printed receipt by simple command from the attendant. This second generation ~88~;~
Wostl device resulted in a step forward in the art providing service station attendant interplay with automated service station functions.
Where a service station includes a terminal apparatus at a central location which is operated by an attendant, the customer parks his car at the pump islands and pumps gas into his vehicle from a normally enabled pump. The customer then walks to the central location for payment by credit card or cash. By permitting the pumps to remain normally enabled at the many islands of the service station, a single attendant is unable to prevent "drive-offs" in which a car pulls 10 to a remote pump, the tank is fueled by the driver and the driver merely drives away without paying.
in order to prevent such drive-offs, some service stations require the customer to walk in to the central location and make pre-payment for gasoline, either by cash or credit card before the attendant will enable the pump. After making pre-payment, the customer must then ~alk back to the pump island and dispense gasoline.
After the dispensing is completed, the customer must then return to the central location to complete the sales transaction by picking up his cash receipt or signing the credit card receipt. It would 20 therefore be highly desirable to provide apparatus which still permits use of a centrally located terminal apparatus and at the same time eliminates the necessity for the customer to make two trips to the centralized location in order to prevent drive-offs.
SUMMARY OF THE INVENTION
lt is therefore an object of this invention to automate credit card transactions in a vehicle service static>n in order to speed up sales transastion and reduce the likelihood of gasoline theft by drive-offs.
~L9~l~22 A system according to the present invention includes a centrally located terminal apparatus which monitors at least one, and preferably, a plurality of fuel dispensers for selective retrieval of fuel sales information. The central terminal apparatus communicates with the attendant on duty permitting the attendant to selectively enable any one of the island pumps.
A remote customer-controlled console located at a gasoline dispensing island communicates with the central terminal in order to permit a customer to provide "collateral" by way of credit card to instruct enablement of the selected pump by the customer at a location remote from the central terminal apparatus. A remote customer-controlled console includes a credit card reader which obtains credit card information in order to verify the credit status of the card the customer is using for collateral. A keyboard and display device are included on the customer console for permitting the customer to select an individual pump for enablement.
Ç~RIEF DESCRIPTION OF THE DRAWING~
Fig. 1 is a perspective view of a gasoline service station incorporating the system of the present invention;
Fig. 2 is a perspective view of an attendant-controlled terminal of the system of Fig. l;
Fig. 3 is a perspective view of a customer-controlled console of the system of Fig. l;
Fig. ~ illustrates a conventional microcomputer forming the process and control system of the terminal of Fig. 2;
Fig. 5 is a block diagram illustration of the customer-controlled consol~ of Fig. 3 and the attendant-controlled terminal of Fig. 2;
Figs. 6 and ~ are flow charts illustrating the basic control sequence executed by the circuitry of Fig. 5.
2~:
DESCRI PTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, a gasoline station 11 includes a plurality of gasoline dispensing islands 13, 15, 17. Each island is shown having three separate gasoline dispensers 19a, 19b, 19c, each of which may have one or two fwel outlets for dispensing separate types of fuels, as for example, regular, high octane, and no-iead gasoline.
Apparatus of the present invention includes an attendant-controlled console or terminal 21, positioned within 10 the sales office of gasoline station 11, and a customer-controlled console 73 disposed at each dispensing islar,d 13, 15, 17. An underground cable 25 provides communication between console 21 and each of the nine pumps and each of the customer-controlled consoles 23. A second cable 27 connects console 21 to a data bank (not shown) for transmission and receipt of credit card information.
As will suggest itself, cable 25 may be positioned overhead instead of underground.
Console 21 is shown in more detail in Fig. 2 as including a receipt printer 29, a credit card reader 31, a keyboard 20 33 and a visual display and pump control keyboard area 35. Console ?l is controlled by the attendant on duty who may take cash or credit cards for payment of gasoline dispensed from the pumps.
Printer 29 and display area 35 may be utilized to provide proper sales information as to both gasoline and miscellaneous items purchased by the customer. The particular operation of console 21 is discussed in greater detail in U . S. Patent No. 4,199,100, Wostl et. al ., which ;s assigned to the assignee of the present invention.
~81~2 Customer-controlled console 23 is shown in more detail in Fig. 3 as including a credit card reader 37, a keyboard 39 and a visual display device 41. Console 23 is controlled by the customer in order to enable a selected one of dispensing pumps 1~. The customer pu115 or "swipes" his credit card through credit card reader 37 in order to provide "collateral" for automatically enabling a fuel dispensin~ p~lmp. The particular pump which the custorner desires to be enabled is keyed into keyboard 39. The display device 41 provides various communication instructions to the customer in order to aid him to properly enable a seîected fuel pump.
Each of the plurality of island customer-controlled consoles ?3 communicate with the attendant console 21 in order to provide pump enablement. Console 21 serves to control the actual pump enablement and credit authorization as well as instructing customers at each island during the enablement process.
The customer is guided through the use of the island console 23 by a series of prompting messages displayed on display device 41.
When in use, the customer will "swipe" his credit card through reader 37 and the card numbers will be conveyed to attendant console 21 There the credit card numbers are transmitted in a normal fashion ~as though the card numbers were read from card reader 31) tc! a data bank at 3 credit verification facility. If credit approval is given, the customer will be instructed on display device 41 to select a dispenser hose number via keyboard 39. His selection will be indicated to the attendant within the station by indication in the display area 35 of attendant console 21. The attendant then will manually authorize the pump via the console 21. As will suggest itself, the attendant could be bypassed where console 21 is constructed to automatically ~8~
enable the appropriate hose when properly selected by the customer.
However, the interplay of the attendant in the enablement process keeps the attendant apprised of enabled pumps for his subsequent completion of the sale.
Once the sel~ct~d hose is enabled, the customer may then begin dispensing fuel. Upon the completion of fueling, the customer will proceed to the attendant at the attendant console to complete the sale. The sale will be completely by signature to the credit card receipt or by cash payment by the customer instead of using the credit card which served as collateral to enable the pump.
Multiple customers may use a single island console 23 as long as they do not attempt to dispense from the same hose. Likewise, customers at other islands may be using additional island consoles 23 concurrently with the operation of the console 23 at the first island .
The communication link between customer console 23 and attendant console 21 is serial in nature, including a transmit cable and a receipt cable. This pair of cables may be sheathed in one overall jacket to form a communication cable between the customer ~0 consoles and the attendant-controlled console. In order to isolate the communication link from transmitted and induced noise, transformer couplings, opto-isolator couplings or a fiber-optic link may be utilized for isolation, as will suggest itself.
When in operation and idling, display 41 at the customer console will display "INSERT CARD". A flashing arrow pointing to the card reader rnay also be included in the message. Once the customer has successfully "swiped" his card through the credit card reader, the display will display "CHECKING CREDIT" as the card is sent to attendant 6~
82;~
console 21 for credit authori~ation. Where credit is denied, a message will appear on the customer console display, as for example, "INVALID
CARD", "DENIED", or "CARD EXPIRED". Cards which have been stolen (or the like) and require attendant intervention will cause a "SEE
ATTE~lTANT"to be displayed on the display device. Where a card cannot be read a~ter three attempts, the display device will display "SEE
ATTEN DANT".
When credit authorization has been obtained by attendant ~onsole 21, the display on the customer console will say "CREDIT OK" and 'SELECT PUMP". The "SELECT PUMP" message may also include a flashing arrow pointing to keyboard 39. The customer uses keyboard 39 to select a pump number. This selection is shown on the display, followed by "UNAVAILABLE" or "PUMP IN USE" for non-programmed or in-use pumps. For an available pump, the display wil! flash "FUEL AT PUMP NO. X".
and attendant console 21 will signal the attendant that pump enablement is requested. The attendant then enables the customer selected pump for dispensing fuel.
When a pump has been properly selected and enabled, and the handle for that pump is actuated, the attendant console receives an 20 indication of handle actuation and will reset (return to idle) customer console 23; the display at the customer console will return to "INSERT
CARD" so that the next customer may begin his transaction.
Failure to actuate the pump handle of the selected pump within a predetermined number of seconds, for example, thirty seconds after the "FUEL AT PUMP NO. X" message first appears, will cause the entire transaction to be cancelled. The pump will be de-authorized, the credit card nwmber will be erased from console 21, and the islancl console will return to the "INSERT CARD" message.
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~g8822 Referring in rlore detail to Fig. 3, credit card reader 37 includes a card receiving slot ~13 adapted to receive the customer's credit card in a sliding f3shion, as the operator pulls the card downwardly through slot 43. Visual indicia 45 is inscribecl adjacent slot 43 for explaining to the customer how to perform the displayed instruction "INSERT CARD" appearing on display 41. As shown, indicia 45 is pictorial in nature and may be positioned on either side of slot 43; however, adclitional instructions in words may be positioned with the pictorial indicia or on the other side of slot 43, as wili suggest itself.
A reading head (not shown) positioned along the insides of guide slot 43 generates a signal having the information carried by the card as the card is pulled quickly through the slot. Card reader 37 retrieves the information from the card for commanding automatic investigation by attendant console 21 of the credit status of the particular credit card read.
Keyboard 39 includes a numeric key pad 47 for entering a selected pump number. As shown, pad 47 includes keys bearing numbers 1 through 16. After a numeric key is pressed, the attendant console signals the attendant to enable the particular pump associated with the key actuated by the customer on key pad 47. Other keys may be iocluded on keyboard 39 if desired. For example, a "HELP" key 49 and a "CLEAR ENTRY" key 51 are shown in Fig. 3.
Attendant console 21 (Fig. 2) includes a dispenser control key pad 53 shown as having two rows of sixteen fuel pump selection buttons 55. Each button 55 is associated with one gasoline pump and may be lighted separateiy for signaling the attendant. Each b~tton 55 is also actuable separately as a switch to permit instructional commands from the attendant. Since a button 55 performs the dual function of a keyboard switch and a display device, the button may be considered as ~8~Z
part of keyboard 33 and as part of display area 35.
The top row of buttons 55 are actuable for enabling a parti~ular pump; the bottom row of buttons 55 are actuable for collecting data of a particular pump to be viewed on display 59. When a customer selects a particular pump for enablemPnt via an island terminal, the associated pump number button 55 on the attendant console flashes; this signals the attendant to actuate the flashing button in order to enable the requested pump. An audible beeping may also be generated in conjunction with the flashing of button 5S, as will suggest itself.
The attendant's actuation of a flashing button 55 of the ~Qp rovv of keypad 53, causes the flashing light of the button to become a steady "Ol~" light for displaying to the attendant which pumps are in use. After the customer has completed dispensing fuel and actuates the pump handle, the lighted button 55 is extinguished and its corresponding button 55 positioned below on the lower row of keypad 53 lights steadily;
this signals the attendant that payment is to be taken for gasoline dispensed from that pump. Actuation of the steadily lighted button 55 on the lower row of keypad 53 changes the steady "ON" light of the button to a flashing light and causes display of the gasoline value onto display 59. A receipt may then be printed from printer 29 by actuation of an enter/print key (generally referred to by reference numeral 61 ) which causes console 21 to make ready for printing a receipt for the sale of gasoline from the pump associated with the button 55 selected, as described in Wostl et. al., Patent No. 4,199,100. The printing of a receipt may serve to extinguish the associated lighted button of the lower row of keypad 53. The pump is reset by subsequent actuation of button 55 on the upper row of keypad 53, when re-enabling the pump for the next customer.
Printer 29 may take the form of a conventional dot matrix printer of the alpha-numeric variety. Ordinarily, printer 29 prints individual customer receipts. Where payment is made by way of credit _g card, printer 29 is operable to print on pre-formed, pre-printed credit invoices having a plurality of sh~sets for formulating at least a customer copy and a charge copy. The credit invoice is printed to contain the particular credit card number of the customer and the total sale amount. Further printing may include other particulars as will suggest itself.
Referring to Fig. 4, a conventional microcomput~r 63 controls the overall system processing and management of console 21. The microcomputer performs a number of tasks which may be summarized as 10 follows:
(1) data is retrieved from the dispensing pumps in the form of the value amount of the gasoline dispensed and is manis~ulated by microcomputer 63 enable printing of gasoline sale information by printer 29, (2) credit card data read from the customer's credit card, either from card reader 31 or card reader 37, is manipulated to provide output commands along cable 27 for enabling transmission of the credit card information to a data bank for establishing credit authorization;
DESCRI PTION OF THE PREFERRED EMBODIMENT
Referring to Fig. 1, a gasoline station 11 includes a plurality of gasoline dispensing islands 13, 15, 17. Each island is shown having three separate gasoline dispensers 19a, 19b, 19c, each of which may have one or two fwel outlets for dispensing separate types of fuels, as for example, regular, high octane, and no-iead gasoline.
Apparatus of the present invention includes an attendant-controlled console or terminal 21, positioned within 10 the sales office of gasoline station 11, and a customer-controlled console 73 disposed at each dispensing islar,d 13, 15, 17. An underground cable 25 provides communication between console 21 and each of the nine pumps and each of the customer-controlled consoles 23. A second cable 27 connects console 21 to a data bank (not shown) for transmission and receipt of credit card information.
As will suggest itself, cable 25 may be positioned overhead instead of underground.
Console 21 is shown in more detail in Fig. 2 as including a receipt printer 29, a credit card reader 31, a keyboard 20 33 and a visual display and pump control keyboard area 35. Console ?l is controlled by the attendant on duty who may take cash or credit cards for payment of gasoline dispensed from the pumps.
Printer 29 and display area 35 may be utilized to provide proper sales information as to both gasoline and miscellaneous items purchased by the customer. The particular operation of console 21 is discussed in greater detail in U . S. Patent No. 4,199,100, Wostl et. al ., which ;s assigned to the assignee of the present invention.
~81~2 Customer-controlled console 23 is shown in more detail in Fig. 3 as including a credit card reader 37, a keyboard 39 and a visual display device 41. Console 23 is controlled by the customer in order to enable a selected one of dispensing pumps 1~. The customer pu115 or "swipes" his credit card through credit card reader 37 in order to provide "collateral" for automatically enabling a fuel dispensin~ p~lmp. The particular pump which the custorner desires to be enabled is keyed into keyboard 39. The display device 41 provides various communication instructions to the customer in order to aid him to properly enable a seîected fuel pump.
Each of the plurality of island customer-controlled consoles ?3 communicate with the attendant console 21 in order to provide pump enablement. Console 21 serves to control the actual pump enablement and credit authorization as well as instructing customers at each island during the enablement process.
The customer is guided through the use of the island console 23 by a series of prompting messages displayed on display device 41.
When in use, the customer will "swipe" his credit card through reader 37 and the card numbers will be conveyed to attendant console 21 There the credit card numbers are transmitted in a normal fashion ~as though the card numbers were read from card reader 31) tc! a data bank at 3 credit verification facility. If credit approval is given, the customer will be instructed on display device 41 to select a dispenser hose number via keyboard 39. His selection will be indicated to the attendant within the station by indication in the display area 35 of attendant console 21. The attendant then will manually authorize the pump via the console 21. As will suggest itself, the attendant could be bypassed where console 21 is constructed to automatically ~8~
enable the appropriate hose when properly selected by the customer.
However, the interplay of the attendant in the enablement process keeps the attendant apprised of enabled pumps for his subsequent completion of the sale.
Once the sel~ct~d hose is enabled, the customer may then begin dispensing fuel. Upon the completion of fueling, the customer will proceed to the attendant at the attendant console to complete the sale. The sale will be completely by signature to the credit card receipt or by cash payment by the customer instead of using the credit card which served as collateral to enable the pump.
Multiple customers may use a single island console 23 as long as they do not attempt to dispense from the same hose. Likewise, customers at other islands may be using additional island consoles 23 concurrently with the operation of the console 23 at the first island .
The communication link between customer console 23 and attendant console 21 is serial in nature, including a transmit cable and a receipt cable. This pair of cables may be sheathed in one overall jacket to form a communication cable between the customer ~0 consoles and the attendant-controlled console. In order to isolate the communication link from transmitted and induced noise, transformer couplings, opto-isolator couplings or a fiber-optic link may be utilized for isolation, as will suggest itself.
When in operation and idling, display 41 at the customer console will display "INSERT CARD". A flashing arrow pointing to the card reader rnay also be included in the message. Once the customer has successfully "swiped" his card through the credit card reader, the display will display "CHECKING CREDIT" as the card is sent to attendant 6~
82;~
console 21 for credit authori~ation. Where credit is denied, a message will appear on the customer console display, as for example, "INVALID
CARD", "DENIED", or "CARD EXPIRED". Cards which have been stolen (or the like) and require attendant intervention will cause a "SEE
ATTE~lTANT"to be displayed on the display device. Where a card cannot be read a~ter three attempts, the display device will display "SEE
ATTEN DANT".
When credit authorization has been obtained by attendant ~onsole 21, the display on the customer console will say "CREDIT OK" and 'SELECT PUMP". The "SELECT PUMP" message may also include a flashing arrow pointing to keyboard 39. The customer uses keyboard 39 to select a pump number. This selection is shown on the display, followed by "UNAVAILABLE" or "PUMP IN USE" for non-programmed or in-use pumps. For an available pump, the display wil! flash "FUEL AT PUMP NO. X".
and attendant console 21 will signal the attendant that pump enablement is requested. The attendant then enables the customer selected pump for dispensing fuel.
When a pump has been properly selected and enabled, and the handle for that pump is actuated, the attendant console receives an 20 indication of handle actuation and will reset (return to idle) customer console 23; the display at the customer console will return to "INSERT
CARD" so that the next customer may begin his transaction.
Failure to actuate the pump handle of the selected pump within a predetermined number of seconds, for example, thirty seconds after the "FUEL AT PUMP NO. X" message first appears, will cause the entire transaction to be cancelled. The pump will be de-authorized, the credit card nwmber will be erased from console 21, and the islancl console will return to the "INSERT CARD" message.
--7~
~g8822 Referring in rlore detail to Fig. 3, credit card reader 37 includes a card receiving slot ~13 adapted to receive the customer's credit card in a sliding f3shion, as the operator pulls the card downwardly through slot 43. Visual indicia 45 is inscribecl adjacent slot 43 for explaining to the customer how to perform the displayed instruction "INSERT CARD" appearing on display 41. As shown, indicia 45 is pictorial in nature and may be positioned on either side of slot 43; however, adclitional instructions in words may be positioned with the pictorial indicia or on the other side of slot 43, as wili suggest itself.
A reading head (not shown) positioned along the insides of guide slot 43 generates a signal having the information carried by the card as the card is pulled quickly through the slot. Card reader 37 retrieves the information from the card for commanding automatic investigation by attendant console 21 of the credit status of the particular credit card read.
Keyboard 39 includes a numeric key pad 47 for entering a selected pump number. As shown, pad 47 includes keys bearing numbers 1 through 16. After a numeric key is pressed, the attendant console signals the attendant to enable the particular pump associated with the key actuated by the customer on key pad 47. Other keys may be iocluded on keyboard 39 if desired. For example, a "HELP" key 49 and a "CLEAR ENTRY" key 51 are shown in Fig. 3.
Attendant console 21 (Fig. 2) includes a dispenser control key pad 53 shown as having two rows of sixteen fuel pump selection buttons 55. Each button 55 is associated with one gasoline pump and may be lighted separateiy for signaling the attendant. Each b~tton 55 is also actuable separately as a switch to permit instructional commands from the attendant. Since a button 55 performs the dual function of a keyboard switch and a display device, the button may be considered as ~8~Z
part of keyboard 33 and as part of display area 35.
The top row of buttons 55 are actuable for enabling a parti~ular pump; the bottom row of buttons 55 are actuable for collecting data of a particular pump to be viewed on display 59. When a customer selects a particular pump for enablemPnt via an island terminal, the associated pump number button 55 on the attendant console flashes; this signals the attendant to actuate the flashing button in order to enable the requested pump. An audible beeping may also be generated in conjunction with the flashing of button 5S, as will suggest itself.
The attendant's actuation of a flashing button 55 of the ~Qp rovv of keypad 53, causes the flashing light of the button to become a steady "Ol~" light for displaying to the attendant which pumps are in use. After the customer has completed dispensing fuel and actuates the pump handle, the lighted button 55 is extinguished and its corresponding button 55 positioned below on the lower row of keypad 53 lights steadily;
this signals the attendant that payment is to be taken for gasoline dispensed from that pump. Actuation of the steadily lighted button 55 on the lower row of keypad 53 changes the steady "ON" light of the button to a flashing light and causes display of the gasoline value onto display 59. A receipt may then be printed from printer 29 by actuation of an enter/print key (generally referred to by reference numeral 61 ) which causes console 21 to make ready for printing a receipt for the sale of gasoline from the pump associated with the button 55 selected, as described in Wostl et. al., Patent No. 4,199,100. The printing of a receipt may serve to extinguish the associated lighted button of the lower row of keypad 53. The pump is reset by subsequent actuation of button 55 on the upper row of keypad 53, when re-enabling the pump for the next customer.
Printer 29 may take the form of a conventional dot matrix printer of the alpha-numeric variety. Ordinarily, printer 29 prints individual customer receipts. Where payment is made by way of credit _g card, printer 29 is operable to print on pre-formed, pre-printed credit invoices having a plurality of sh~sets for formulating at least a customer copy and a charge copy. The credit invoice is printed to contain the particular credit card number of the customer and the total sale amount. Further printing may include other particulars as will suggest itself.
Referring to Fig. 4, a conventional microcomput~r 63 controls the overall system processing and management of console 21. The microcomputer performs a number of tasks which may be summarized as 10 follows:
(1) data is retrieved from the dispensing pumps in the form of the value amount of the gasoline dispensed and is manis~ulated by microcomputer 63 enable printing of gasoline sale information by printer 29, (2) credit card data read from the customer's credit card, either from card reader 31 or card reader 37, is manipulated to provide output commands along cable 27 for enabling transmission of the credit card information to a data bank for establishing credit authorization;
(3) data is retrieved from and transmitted to customer controlled console 23 in order to provide instructions to a customer during customer enablement of a selected one of the fuel dispensing pumps.
One suitable microcomputer 63 may include a conventional ~-80 microprocessor. As with Patent No. 4,199,100, reference here also is made to publications of Mostek Corporation, Carrollton, Texas: Mostek's MK 3880 Central Processing Unit Technical Manual, February, 1977, and Mostek's MK 3881 Parallel l/O Controller Technica! Manual, November, 197~. More particularly, when using more than one island terminal, IBM SDLC protocol is used to permit the attendant terminal to communicate with a select one of the island terminals. As understood, the SDLC coding includes an address code to tell which island terminal is to be talked with by the attendant terminal 21. A conventional Zilog Z80 SIO chip is used to permit the SDLC protocol, as described h~reina~ter .
As shown in Fig. 4, microcomputer 63 treats printer 29, card reader 31, keyboard 33, display area 35, ~uel dispensing pumps 19a-c and customer consoles 23 as peripheral devices which are interconnected by means of bus cables 65. The microcomputer is also connected to cable 27 for communication with the data bank.
Microcomputer 63 is interconnected to the dispensing islands via cable 25b for monitoring the sale of gasoline dispensed from each pump and ~or monitoring the actuation of the pump handle when the customer begins to dispense gas. Also, the dispensing islands receive commands from microcomputer 63 for enabling and resetting selected pumps.
The final totals for each pump are transmitted to microcomputer 63 at the completion of fue! dispensing when commanded by the attendant's actuation of the dispenser control key pad 53. The sales data from the 20 pump is accumulated and the associated pump is made available for selection by another customer. The attendant actuates key pad 53 in order to provide the appropriate gas sales in~ormation of a selected pump for printing by printer 29 onto a receipt for the same customer.
This is described in detail in Patent No. 4,199,100.
The pump sales data may be encoded in a number o~ ways, pre~erably, the value amount rather than the gallonage is encoded in the pump ~ata. The gallonage may be computable separately by the microcomputer from a known unit price per gallon.
As illustrated in the above-cited W05tl '421 patent (see Figs. 9~12), fuel pump controls are located on the outside of the ~ ~ C~Q~
pump for actuation by the customer. After a customer completes dispensing a desired quantity of fuel, a handle located on the side of the pump is rotated by the customer to stop the gasoline tally permitting the pump to be replaced in its holder. The rotation of the pump handle can be utilized to place the pump's final sales data in a ready state for retrieval by the microcomputer when desired. The pump may automatically lock at this time until reset by the microcornputer.
Further, when the pump handle is initially rotated by the customer to begin g3soline dispensing after pump enablement by the attendant, a 10 control signal is retrieved by microcomputer 63 for returning to idle the island console 23 whicl- requested the associated pump to be enabled. As will suggest itself, if the pump handle is rotated without previous attendant enablement, the control signal may serve to cause actuation of a beeping signal to alert the attendant accordingly .
Referriny to Fig. 5, a conventional microcomputer 67 controls the processing and management of customer-controlled console 23. Microcomputer 67 may similarly be constructed from a ZoO
Microprocessor. The microcomputer performs a number of tasks which 20 may be summari~ed as follows:
(1) data is retrieved from card reader 37 o~ the information read from the customer's credit card and is manipulated to provide output commands via an output channel or port 69; output port 69 is connected alon~ cable 25a to an input port 71 of microcomputer 63 of the attendant console;
(2) data is retrieved from keyboard 39 of the particular pump number selected by the customer and is manipulated to provide output cor,lmands along cable 5a via outpout port 69 to attendant console 21;
(3) data is received f rom the attendant console via 8~
outport 69 of particular instructional commands for causing display of information to the customer and is manipulated to provide output commands to display device 41 for displaying visual instructions to the customer operating console 23.
As shown in Fig. 5, microcomputer 67 treats credit card reader 37, keyboard 39, display device 41 and output port 69 as peripheral devices which are interconnected by means of a bus or cables 73. Microcomputers 63, 67 include a conventional 8-bit parallel bus microprocessor having an accumulator, a plurality of registers and an instruction register and CPU control for interpre~ation and execution of micro-level assembly language instructions. Microcomputer 63 manages the acquisition of dispensing sales data from gasoline pumps and other sales information data entered through keyboarcl 33, processes the data and prints the sales information in receipt form via printer 29. The system is manage~
under the control of keyboard 33 permitting the attendant to initiate particular operations to be performed by microcomputer 63. These functions are described in connection with flow diagrams in Patent No. 4,199,100.
Output port 69 and input port 71 are shown in Fig. 5 as diagrammatic btocks connected by a communication link represented by cable 25a. The output port and input port blocks are comprised of like circuitry, which i5 illustrated in greater detail in Fig. 5B.
A serial input/output device ~SIC~) 77 is the primary functioning component of ports 69, 71. SIO device 77 k a con~/entional Zilog Z80 SIO chip. Reference is made to "Z-80 SIO Te hnical Manual"
published in 1978 by Zilog Inc.
The SIO device 77 is connected to its associated microcomputer 63 or 67 by a plurality of conductors 79, as representecl by the two conductors shoYvn in Fig. SB. Transfer of data an~ &ommands flow between the microcomputer and the SIO, in order to est3blish data transfer bPtween the customer terminal and the attendant console.
2~
As understood, the SIO is an intelligent peripheral device that is configurabl~ by systerns software so that it çan perform a given serial data commwnic~tion. The SIO can generate and check error codes in an SDLC mode. As understood, a clock circuit 81 is utilized to establish phase synchronization of thP incoming ~ata with the clock sisnal driving the SIO during receipt of data.
SIO 77 of one port communicates with the SIO 77 of the other port via cable 25a, which is comprised of a transmit conductor 83 and a receive conductor 85. A pair of conventional opto isolators 87, ~9 may be uti!ized to isolate the console and terminal circuits from transmitted and induced noise on the ommunication link 25a. The many output ports 69 of the several island terminals 23 are connected in parallel ~ith respect to conductors 83, 85, so that transmit data put on conductor 83 is sent to all island terminals.
The commun;cation protocol used over the communication link is SDLC (synchronous data link control). The SIO of the attendant console is responsible for controlling the data link. All transmissions over the link come from the attendant console or go to the attendant console. Th customer terminals only transmit in response to polls from the attendant console or to acknowledge receipt of the message from the attendant console.
Each SDLC transmission is comprised of a packet or frame of data as shown in Fig. 5C. Each frame is composed of the same .specific format:
a beginning flag (F) that indicates the beginning of the f rame;
an address (A) field that identifies the ~ustomer terminal that is sending (or is to receive ) the frame;
a çontrol (C) field that specifies the purpose of the particular frame;
an optional, information (I) field that contairls the information data;
~14--a frame check sequence (FCS) field that enables the receiving station to check the transmission accuracy of the frame; and an ending flag (F) that signals the end of the frame.
Each SDLC packet begins and ends as shown in Fig. 5C with a flag 91, 93. The remainder of the packet is separated into four fields ineluding an address field 95, a control field 97, an information field 39, and a frame chcck sequence field 101.
Address field 9S of a frame is the address of the customer terminal with respect to which there exists communication with the attendant console. If the attendant console is transmitting the frame, the address tells which of the customer terminals is to receive frame.
If a customer terminal is transmitting the frame, the address tells the attendant console from which customer terminal the message is emanating .
The control field 97 defines the function of the particular frame. As shown in Fig. 5D, the control field contains "send counts"
NS at 103 and "receive counts" NR at 105 which are used to assure that frames are received and accepted in their proper order. The send count 103 id~ntifies the number assigned to the particular frame \,vithin the sequence of frames being transmitted. The receive count 105 identifies the send count that the transmitting SIO expects to receive next.
A P/F bit 107 is referred to as a pole bit. With reference to a customer terminal transmission, the pole bit is referred to as the final bit. When the pole bit is a (1) in a transmission to a customer terminal, the pole bit indicates that the custorner termina!
is required to respond. When the pole bit is a (1 ) in a transmission from a customer terminal, it indicates that the transmission is the last from the customer terminal.
The two count subfields 103, 105 are provided in order to 3C allow recovery of transmitted frames which are in error and to ensure synchronization of frames as thcy are passed back and forth. When as SIO transmits a sequence of frames, the frames are counted. This count is known as NS. NS is incremented by the transmitting terminal after the frame is transmitted. When as SIO receives an error free frame it is counted; this count is known as NR. NR is a post-increment fie!d, advancing after a frame is received. NR is therefore an indicator of the next NS field to be received. If the incoming NS
value does not agree with the NR, the frame is rejected and NR does not advance. The receiving microcomputer c~nfirms the accepted numbered information frame to the sendin~3 SIC) or r~ports error in lO transmission in order for retransmission of the proper frame.
As understood, the control frame may have an unnumbered format for initializing the island terminals and a supervisory format which are used to confirm received frames, convey ready or busy conditions, and to report frame numbering errors, as understood.
Reference is made to an IBM publication entitled "IBM Synchronous Data Link Control Generator Inforr,1ation", No. GA 27-3093-2, File No.
GENL 09,.
The SDLC frame also includes a variable lenyth information field 99, Fig. 5C. The information field may be of any length, but 20 must be a r,1ultiple of eight bits.
The SDLC frame also includes a frame check sequence field 101, Fig. 5C. The frame check sequence is utilized to check a received frame for ~rrors that may have been introduced in the communication channel. The frame check sequence frame includes a 16-bit sequence l:hat is a resultant of a computation performed on the address field, the control field and the information field. The computation is performed at the transmitting terminal. As understood, the computation method used is referred to in the art as a cyclic redundar,cy checking. The receiving terminal performs the same 30 computation on the address field, the control field and the information field and compares its result with frame check sequence field 107.
The Z-80 SIO 77 is capable of handling IBM Syr1chronous Data ~16-Link Control protocols. SIO 77 handles the transmission and recognition of flag characters called for at the beginning and ending of the SDLC frame. SIO 77 has an address search mode that recognizes its own customer terminal address so that it can accept or rej~ct the SDLC frame coming from the attendant console. The control field of the SDLC frame is transparent to the SIO and is simply transferred to the microcomputer. The Z-80 SIO 77 responds to the frame check sequence field 101. The SIO 77 automatically terminates an SDLC frame after it has transmitted proper inforrnation receiv~d from its lO associated microcomputer. The SiO terminates the SDLC frame by generating the frarne check sequence followed by the flag byte.
As a customer uses the customer terminal, microcomputers 63, 67 step through a control sequence of steps diagrammatically shown in the flow charts of Figs. 6 and 7, in order to provide a pump's enablement request to the attendant. The control sequence for the customer console embodies a set of subroutines utili~ed to transmit and read information from attendant console 21, read information from card reader 37 and from keyboard 39 and transmit information to display device 41.
:20 Referring to Fig. 6, the encircled A indicates the initial entry point into the control sequence for execution of a pump enablement request from console 23 to console 21. At step S-1, microcomputer 67 transmits display signals to display device 41 to display "INSERT CARD". This display is maintained by microcomputer 67 until actuation of the console by a customer. This is the idle state of customer console 23. The customer console 23 is placed in its idle state by a "reset" instruction from attendant control console 21, as cdescribed below.
At step S-2, microcomputer 67 determines whether a credit card has been pulled through the customer console 23 in order to begin the process of pump enablement. So long as a cret:lit card has not been read, customer control console 23 stays in its idle state. Upon the actuation of credit card reader 37, microcomputer 67 is signalled for retrieving the entire card data to be receiv~d. This may be accomplished by an interrupt signal from card reader 37 Microcomputer 67 may perform a number of checks at step S-3 to determine whether the entire card data has been retrieved, similar to the card check performed by microcomputer 63 as discussed in U . S . Patent No. 4,199,100. If card information is incomplete, microcomputer 67 may display an "INSERT AC;AIN" (at st0p S-4) on display device 41 for signalling the customer to re-enter the cr~odit card through card reader 37. If th;s occurs after four times in a row, microcomputer 67 may display "SEE ATTENDANT" on display device 41 to instruct the customer to see the attendant regarding the non-reading of the credit card, steps S-5, S-6, and S-7. As will suggest itself, either microcomputer 63, 67 may perform the step of checking the card data. Other checks may be performed at step S-3, as discussed above, for valid or expired cards.
Where microcomputer 67 receives the entire card data, microcomputer 67 manipulates the data for transmission to console 21 (step S-8) and then actuates display device ~1 at step S-9 for displaying "CHECKING CARD" to the customer. After the data has been received by microcomputer 63 of console 21, microcomputer 63 enters its subroutine for transmission of the credit card data to the data bank, as described in the 4,199,100 patent. After data transmission, microcomputer 63 awaits credit authorization or denial to be returned from the data bank.
The data bank is stored with credit card validation data l:rom which the validity of accounts can be determined. By way of exampie, if the data bank is a centralli~ed data bank serving a plurality of service stations 11 from a remote location, then the data bank may store each account number together with an indication of whether the account is valid or invalid. The data bank functions --18~
by returning to the microcomputer a credit card validation data indicative of the credit card validity state.
As described in the 4,199,100 patent, attendant control console 21 reads the data transmitted frorn the data bank and determines whether or not credit has been authorized. Depending on whether or not credit has been authorized, a particular display is to be shown on display device 41 to the customer. If credit is authorized, the display will read "CREDIT OK", "SELECT PUMP". Microcomputer 63 provides instructions to rnicrocomputer 67 for displaying the proper inforrnation to the customer. Microcomputer 63 stores the credit card i nformation .
At step S-1û, microcomputer 67 responds to instructions from microcomputer 63 as to whether credit has been authorized. If credit has not been authorized, a message "SEE ATTENDAI~IT" is displayed on display device 41 (steps S-11, S-12) for a predetermined time.
Thereafter, microcomputer 67 returns to step S-1 and enters its idle state for use by a new customer.
If at step S-10 credit has been authorized, microcomputer 67 displays "CREDIT OK", "SELECT PUMP" and awaits the selection of the pump number by the customer, steps S-13a, S-13b, S-14.
Microcomputer 67 then determines which of the sev~ral keys of keyboard 39 have been actuated and then forwards the information to microcornputer 63 at step S-lS (Fig. 7).
Microcomputer 63 upon receiving the pump request number searches its memory to determine whether or not the pump i5 available for actuation. If the pump is available for enablement, microcomputer 63 sends instructions to microcomputer 67 which are interpreted at step S-16 for actuation of display device 41 to clisplay "FUEL AT
PUMP NO. X", step S-17. Microcomput~r 63 also actuates a flashing o~ the appropriate button 55 on display area 35 for signalling the attendant as to the particular pump being selected by the customer.
The atter-dant then actuates the fiashing button 55 directing microcomputer 63 to enable the selected gas pump.
If microcomputer 63 determines that the pump is unavailable, or in use, instructions are s~nt to microcomputer 67 (steps S-16, S-18) directing display of "PUMP UNAVAILABL.E" ~r "PUMP IN USE".
As wili suggest itself, step 16 may limit the number of attempts at pump selection to no more than three~
Where the customer is required to select a new pump number at step S-1~, microcomputer 67 transfers control back to step 5-14.
However, where a selected pump is available (step S-17), microcomPUter ~
67 Pxecutes step S-19 in which the microcomputer waits for "reset"
instructions from the attendant console in order to place the console in its idle state.
The microcomputer 63 monitors the rotating handle on the gas pump which has been selected in order to provide "reset"
instructions to island console 23. If a predetermined time lapses without rotation of the handle of the selected pump microcomputer 67 resets console 23. In the case where a much larger delay occurs, microcomputer 63 erases any credit card information or th0 like stored in its microcomputer memory bank. Upon receiving reset instru~tions at step S-19 or upon lapse of time, microcomputer 67 returns to step S-l placing the console in its idle state to await the next customer at island 23.
It should he understood, of course, that the foregoing disclosure relates to preferred embodiments of the invention and that other modifications or alterations may be made therein without departing fromthe spirit or scope of the invention as set forth in the appended claims.
One suitable microcomputer 63 may include a conventional ~-80 microprocessor. As with Patent No. 4,199,100, reference here also is made to publications of Mostek Corporation, Carrollton, Texas: Mostek's MK 3880 Central Processing Unit Technical Manual, February, 1977, and Mostek's MK 3881 Parallel l/O Controller Technica! Manual, November, 197~. More particularly, when using more than one island terminal, IBM SDLC protocol is used to permit the attendant terminal to communicate with a select one of the island terminals. As understood, the SDLC coding includes an address code to tell which island terminal is to be talked with by the attendant terminal 21. A conventional Zilog Z80 SIO chip is used to permit the SDLC protocol, as described h~reina~ter .
As shown in Fig. 4, microcomputer 63 treats printer 29, card reader 31, keyboard 33, display area 35, ~uel dispensing pumps 19a-c and customer consoles 23 as peripheral devices which are interconnected by means of bus cables 65. The microcomputer is also connected to cable 27 for communication with the data bank.
Microcomputer 63 is interconnected to the dispensing islands via cable 25b for monitoring the sale of gasoline dispensed from each pump and ~or monitoring the actuation of the pump handle when the customer begins to dispense gas. Also, the dispensing islands receive commands from microcomputer 63 for enabling and resetting selected pumps.
The final totals for each pump are transmitted to microcomputer 63 at the completion of fue! dispensing when commanded by the attendant's actuation of the dispenser control key pad 53. The sales data from the 20 pump is accumulated and the associated pump is made available for selection by another customer. The attendant actuates key pad 53 in order to provide the appropriate gas sales in~ormation of a selected pump for printing by printer 29 onto a receipt for the same customer.
This is described in detail in Patent No. 4,199,100.
The pump sales data may be encoded in a number o~ ways, pre~erably, the value amount rather than the gallonage is encoded in the pump ~ata. The gallonage may be computable separately by the microcomputer from a known unit price per gallon.
As illustrated in the above-cited W05tl '421 patent (see Figs. 9~12), fuel pump controls are located on the outside of the ~ ~ C~Q~
pump for actuation by the customer. After a customer completes dispensing a desired quantity of fuel, a handle located on the side of the pump is rotated by the customer to stop the gasoline tally permitting the pump to be replaced in its holder. The rotation of the pump handle can be utilized to place the pump's final sales data in a ready state for retrieval by the microcomputer when desired. The pump may automatically lock at this time until reset by the microcornputer.
Further, when the pump handle is initially rotated by the customer to begin g3soline dispensing after pump enablement by the attendant, a 10 control signal is retrieved by microcomputer 63 for returning to idle the island console 23 whicl- requested the associated pump to be enabled. As will suggest itself, if the pump handle is rotated without previous attendant enablement, the control signal may serve to cause actuation of a beeping signal to alert the attendant accordingly .
Referriny to Fig. 5, a conventional microcomputer 67 controls the processing and management of customer-controlled console 23. Microcomputer 67 may similarly be constructed from a ZoO
Microprocessor. The microcomputer performs a number of tasks which 20 may be summari~ed as follows:
(1) data is retrieved from card reader 37 o~ the information read from the customer's credit card and is manipulated to provide output commands via an output channel or port 69; output port 69 is connected alon~ cable 25a to an input port 71 of microcomputer 63 of the attendant console;
(2) data is retrieved from keyboard 39 of the particular pump number selected by the customer and is manipulated to provide output cor,lmands along cable 5a via outpout port 69 to attendant console 21;
(3) data is received f rom the attendant console via 8~
outport 69 of particular instructional commands for causing display of information to the customer and is manipulated to provide output commands to display device 41 for displaying visual instructions to the customer operating console 23.
As shown in Fig. 5, microcomputer 67 treats credit card reader 37, keyboard 39, display device 41 and output port 69 as peripheral devices which are interconnected by means of a bus or cables 73. Microcomputers 63, 67 include a conventional 8-bit parallel bus microprocessor having an accumulator, a plurality of registers and an instruction register and CPU control for interpre~ation and execution of micro-level assembly language instructions. Microcomputer 63 manages the acquisition of dispensing sales data from gasoline pumps and other sales information data entered through keyboarcl 33, processes the data and prints the sales information in receipt form via printer 29. The system is manage~
under the control of keyboard 33 permitting the attendant to initiate particular operations to be performed by microcomputer 63. These functions are described in connection with flow diagrams in Patent No. 4,199,100.
Output port 69 and input port 71 are shown in Fig. 5 as diagrammatic btocks connected by a communication link represented by cable 25a. The output port and input port blocks are comprised of like circuitry, which i5 illustrated in greater detail in Fig. 5B.
A serial input/output device ~SIC~) 77 is the primary functioning component of ports 69, 71. SIO device 77 k a con~/entional Zilog Z80 SIO chip. Reference is made to "Z-80 SIO Te hnical Manual"
published in 1978 by Zilog Inc.
The SIO device 77 is connected to its associated microcomputer 63 or 67 by a plurality of conductors 79, as representecl by the two conductors shoYvn in Fig. SB. Transfer of data an~ &ommands flow between the microcomputer and the SIO, in order to est3blish data transfer bPtween the customer terminal and the attendant console.
2~
As understood, the SIO is an intelligent peripheral device that is configurabl~ by systerns software so that it çan perform a given serial data commwnic~tion. The SIO can generate and check error codes in an SDLC mode. As understood, a clock circuit 81 is utilized to establish phase synchronization of thP incoming ~ata with the clock sisnal driving the SIO during receipt of data.
SIO 77 of one port communicates with the SIO 77 of the other port via cable 25a, which is comprised of a transmit conductor 83 and a receive conductor 85. A pair of conventional opto isolators 87, ~9 may be uti!ized to isolate the console and terminal circuits from transmitted and induced noise on the ommunication link 25a. The many output ports 69 of the several island terminals 23 are connected in parallel ~ith respect to conductors 83, 85, so that transmit data put on conductor 83 is sent to all island terminals.
The commun;cation protocol used over the communication link is SDLC (synchronous data link control). The SIO of the attendant console is responsible for controlling the data link. All transmissions over the link come from the attendant console or go to the attendant console. Th customer terminals only transmit in response to polls from the attendant console or to acknowledge receipt of the message from the attendant console.
Each SDLC transmission is comprised of a packet or frame of data as shown in Fig. 5C. Each frame is composed of the same .specific format:
a beginning flag (F) that indicates the beginning of the f rame;
an address (A) field that identifies the ~ustomer terminal that is sending (or is to receive ) the frame;
a çontrol (C) field that specifies the purpose of the particular frame;
an optional, information (I) field that contairls the information data;
~14--a frame check sequence (FCS) field that enables the receiving station to check the transmission accuracy of the frame; and an ending flag (F) that signals the end of the frame.
Each SDLC packet begins and ends as shown in Fig. 5C with a flag 91, 93. The remainder of the packet is separated into four fields ineluding an address field 95, a control field 97, an information field 39, and a frame chcck sequence field 101.
Address field 9S of a frame is the address of the customer terminal with respect to which there exists communication with the attendant console. If the attendant console is transmitting the frame, the address tells which of the customer terminals is to receive frame.
If a customer terminal is transmitting the frame, the address tells the attendant console from which customer terminal the message is emanating .
The control field 97 defines the function of the particular frame. As shown in Fig. 5D, the control field contains "send counts"
NS at 103 and "receive counts" NR at 105 which are used to assure that frames are received and accepted in their proper order. The send count 103 id~ntifies the number assigned to the particular frame \,vithin the sequence of frames being transmitted. The receive count 105 identifies the send count that the transmitting SIO expects to receive next.
A P/F bit 107 is referred to as a pole bit. With reference to a customer terminal transmission, the pole bit is referred to as the final bit. When the pole bit is a (1) in a transmission to a customer terminal, the pole bit indicates that the custorner termina!
is required to respond. When the pole bit is a (1 ) in a transmission from a customer terminal, it indicates that the transmission is the last from the customer terminal.
The two count subfields 103, 105 are provided in order to 3C allow recovery of transmitted frames which are in error and to ensure synchronization of frames as thcy are passed back and forth. When as SIO transmits a sequence of frames, the frames are counted. This count is known as NS. NS is incremented by the transmitting terminal after the frame is transmitted. When as SIO receives an error free frame it is counted; this count is known as NR. NR is a post-increment fie!d, advancing after a frame is received. NR is therefore an indicator of the next NS field to be received. If the incoming NS
value does not agree with the NR, the frame is rejected and NR does not advance. The receiving microcomputer c~nfirms the accepted numbered information frame to the sendin~3 SIC) or r~ports error in lO transmission in order for retransmission of the proper frame.
As understood, the control frame may have an unnumbered format for initializing the island terminals and a supervisory format which are used to confirm received frames, convey ready or busy conditions, and to report frame numbering errors, as understood.
Reference is made to an IBM publication entitled "IBM Synchronous Data Link Control Generator Inforr,1ation", No. GA 27-3093-2, File No.
GENL 09,.
The SDLC frame also includes a variable lenyth information field 99, Fig. 5C. The information field may be of any length, but 20 must be a r,1ultiple of eight bits.
The SDLC frame also includes a frame check sequence field 101, Fig. 5C. The frame check sequence is utilized to check a received frame for ~rrors that may have been introduced in the communication channel. The frame check sequence frame includes a 16-bit sequence l:hat is a resultant of a computation performed on the address field, the control field and the information field. The computation is performed at the transmitting terminal. As understood, the computation method used is referred to in the art as a cyclic redundar,cy checking. The receiving terminal performs the same 30 computation on the address field, the control field and the information field and compares its result with frame check sequence field 107.
The Z-80 SIO 77 is capable of handling IBM Syr1chronous Data ~16-Link Control protocols. SIO 77 handles the transmission and recognition of flag characters called for at the beginning and ending of the SDLC frame. SIO 77 has an address search mode that recognizes its own customer terminal address so that it can accept or rej~ct the SDLC frame coming from the attendant console. The control field of the SDLC frame is transparent to the SIO and is simply transferred to the microcomputer. The Z-80 SIO 77 responds to the frame check sequence field 101. The SIO 77 automatically terminates an SDLC frame after it has transmitted proper inforrnation receiv~d from its lO associated microcomputer. The SiO terminates the SDLC frame by generating the frarne check sequence followed by the flag byte.
As a customer uses the customer terminal, microcomputers 63, 67 step through a control sequence of steps diagrammatically shown in the flow charts of Figs. 6 and 7, in order to provide a pump's enablement request to the attendant. The control sequence for the customer console embodies a set of subroutines utili~ed to transmit and read information from attendant console 21, read information from card reader 37 and from keyboard 39 and transmit information to display device 41.
:20 Referring to Fig. 6, the encircled A indicates the initial entry point into the control sequence for execution of a pump enablement request from console 23 to console 21. At step S-1, microcomputer 67 transmits display signals to display device 41 to display "INSERT CARD". This display is maintained by microcomputer 67 until actuation of the console by a customer. This is the idle state of customer console 23. The customer console 23 is placed in its idle state by a "reset" instruction from attendant control console 21, as cdescribed below.
At step S-2, microcomputer 67 determines whether a credit card has been pulled through the customer console 23 in order to begin the process of pump enablement. So long as a cret:lit card has not been read, customer control console 23 stays in its idle state. Upon the actuation of credit card reader 37, microcomputer 67 is signalled for retrieving the entire card data to be receiv~d. This may be accomplished by an interrupt signal from card reader 37 Microcomputer 67 may perform a number of checks at step S-3 to determine whether the entire card data has been retrieved, similar to the card check performed by microcomputer 63 as discussed in U . S . Patent No. 4,199,100. If card information is incomplete, microcomputer 67 may display an "INSERT AC;AIN" (at st0p S-4) on display device 41 for signalling the customer to re-enter the cr~odit card through card reader 37. If th;s occurs after four times in a row, microcomputer 67 may display "SEE ATTENDANT" on display device 41 to instruct the customer to see the attendant regarding the non-reading of the credit card, steps S-5, S-6, and S-7. As will suggest itself, either microcomputer 63, 67 may perform the step of checking the card data. Other checks may be performed at step S-3, as discussed above, for valid or expired cards.
Where microcomputer 67 receives the entire card data, microcomputer 67 manipulates the data for transmission to console 21 (step S-8) and then actuates display device ~1 at step S-9 for displaying "CHECKING CARD" to the customer. After the data has been received by microcomputer 63 of console 21, microcomputer 63 enters its subroutine for transmission of the credit card data to the data bank, as described in the 4,199,100 patent. After data transmission, microcomputer 63 awaits credit authorization or denial to be returned from the data bank.
The data bank is stored with credit card validation data l:rom which the validity of accounts can be determined. By way of exampie, if the data bank is a centralli~ed data bank serving a plurality of service stations 11 from a remote location, then the data bank may store each account number together with an indication of whether the account is valid or invalid. The data bank functions --18~
by returning to the microcomputer a credit card validation data indicative of the credit card validity state.
As described in the 4,199,100 patent, attendant control console 21 reads the data transmitted frorn the data bank and determines whether or not credit has been authorized. Depending on whether or not credit has been authorized, a particular display is to be shown on display device 41 to the customer. If credit is authorized, the display will read "CREDIT OK", "SELECT PUMP". Microcomputer 63 provides instructions to rnicrocomputer 67 for displaying the proper inforrnation to the customer. Microcomputer 63 stores the credit card i nformation .
At step S-1û, microcomputer 67 responds to instructions from microcomputer 63 as to whether credit has been authorized. If credit has not been authorized, a message "SEE ATTENDAI~IT" is displayed on display device 41 (steps S-11, S-12) for a predetermined time.
Thereafter, microcomputer 67 returns to step S-1 and enters its idle state for use by a new customer.
If at step S-10 credit has been authorized, microcomputer 67 displays "CREDIT OK", "SELECT PUMP" and awaits the selection of the pump number by the customer, steps S-13a, S-13b, S-14.
Microcomputer 67 then determines which of the sev~ral keys of keyboard 39 have been actuated and then forwards the information to microcornputer 63 at step S-lS (Fig. 7).
Microcomputer 63 upon receiving the pump request number searches its memory to determine whether or not the pump i5 available for actuation. If the pump is available for enablement, microcomputer 63 sends instructions to microcomputer 67 which are interpreted at step S-16 for actuation of display device 41 to clisplay "FUEL AT
PUMP NO. X", step S-17. Microcomput~r 63 also actuates a flashing o~ the appropriate button 55 on display area 35 for signalling the attendant as to the particular pump being selected by the customer.
The atter-dant then actuates the fiashing button 55 directing microcomputer 63 to enable the selected gas pump.
If microcomputer 63 determines that the pump is unavailable, or in use, instructions are s~nt to microcomputer 67 (steps S-16, S-18) directing display of "PUMP UNAVAILABL.E" ~r "PUMP IN USE".
As wili suggest itself, step 16 may limit the number of attempts at pump selection to no more than three~
Where the customer is required to select a new pump number at step S-1~, microcomputer 67 transfers control back to step 5-14.
However, where a selected pump is available (step S-17), microcomPUter ~
67 Pxecutes step S-19 in which the microcomputer waits for "reset"
instructions from the attendant console in order to place the console in its idle state.
The microcomputer 63 monitors the rotating handle on the gas pump which has been selected in order to provide "reset"
instructions to island console 23. If a predetermined time lapses without rotation of the handle of the selected pump microcomputer 67 resets console 23. In the case where a much larger delay occurs, microcomputer 63 erases any credit card information or th0 like stored in its microcomputer memory bank. Upon receiving reset instru~tions at step S-19 or upon lapse of time, microcomputer 67 returns to step S-l placing the console in its idle state to await the next customer at island 23.
It should he understood, of course, that the foregoing disclosure relates to preferred embodiments of the invention and that other modifications or alterations may be made therein without departing fromthe spirit or scope of the invention as set forth in the appended claims.
Claims (15)
1. A system for use in a gasoline station, or the like, for automatic enablement of fuel dispensing means from the fuel island by a customer credit card, comprising:
i. credit card reader means operable for reading indicia carried by a credit card and for generating card coded data indicative of said indicia;
ii. customer-operable keyboard means including key means for operator generation of keyboard data indicative of a selected one of said fuel dispensing means;
iii. display means responsive to display signals for visually displaying information for communicating with the customer;
iv. output channel means for transmitting and receiving control data signals away from and to said customer control means; and v. first processor control means connected to said credit card reader means, said keyboard means, said display means and said output channel means, said processor control means being responsive to operation of said card reader means for transmitting control data signals carrying signals representing said card coded data via said output channel means and responsive to operation of said keyboard means for transmitting control data signals carrying signals representing said keyboard data via said output channel means and responsive to control data signals received via said output channel means for displaying visual information on said display means for instructing the customer's operation of said customer control means; and attendant control means for use by the attendant of the gas station, said attendant control means being manually operable by the attendant for enabling a selected one of said fuel dispensing means, said attendant control means including:
i. data transmission means connectable to a data bank and capable of transmitting control data signals thereto and capable of receiving second coded data signals from the data bank representative of credit authorization, said second coded data signals having a valid credit state or a non-valid credit state;
ii. input channel means connected to said output channel means of said customer control means, for transmitting and receiving said control data signals from and to said customer control means;
iii. indicator means for indicating to the attendant the value of dispensed fuel of one of said dispensing means; and iv. second processor control means connected to said fuel dispensing means, said data transmission means, said input channel means and said fuel indicator means, said processor control means responsive to certain of said control data signals received from said customer control means, for instructing said data transmission means to transmit credit card coded data to said data bank and responsive to said second coded data signals from the data bank for transmitting control data signals to said customer control means via said input channel means and responsive to certain of said control data signals from said customer control means for instructing enablement of a selected one of said fuel dispensing means and responsive to said first coded data signals for activating said indicator means, for providing an indication to the attendant of the value of dispensed fuel.
i. credit card reader means operable for reading indicia carried by a credit card and for generating card coded data indicative of said indicia;
ii. customer-operable keyboard means including key means for operator generation of keyboard data indicative of a selected one of said fuel dispensing means;
iii. display means responsive to display signals for visually displaying information for communicating with the customer;
iv. output channel means for transmitting and receiving control data signals away from and to said customer control means; and v. first processor control means connected to said credit card reader means, said keyboard means, said display means and said output channel means, said processor control means being responsive to operation of said card reader means for transmitting control data signals carrying signals representing said card coded data via said output channel means and responsive to operation of said keyboard means for transmitting control data signals carrying signals representing said keyboard data via said output channel means and responsive to control data signals received via said output channel means for displaying visual information on said display means for instructing the customer's operation of said customer control means; and attendant control means for use by the attendant of the gas station, said attendant control means being manually operable by the attendant for enabling a selected one of said fuel dispensing means, said attendant control means including:
i. data transmission means connectable to a data bank and capable of transmitting control data signals thereto and capable of receiving second coded data signals from the data bank representative of credit authorization, said second coded data signals having a valid credit state or a non-valid credit state;
ii. input channel means connected to said output channel means of said customer control means, for transmitting and receiving said control data signals from and to said customer control means;
iii. indicator means for indicating to the attendant the value of dispensed fuel of one of said dispensing means; and iv. second processor control means connected to said fuel dispensing means, said data transmission means, said input channel means and said fuel indicator means, said processor control means responsive to certain of said control data signals received from said customer control means, for instructing said data transmission means to transmit credit card coded data to said data bank and responsive to said second coded data signals from the data bank for transmitting control data signals to said customer control means via said input channel means and responsive to certain of said control data signals from said customer control means for instructing enablement of a selected one of said fuel dispensing means and responsive to said first coded data signals for activating said indicator means, for providing an indication to the attendant of the value of dispensed fuel.
2. A system according to Claim 1 wherein said fuel dispensing means includes signal generation means for generating control data signals for indicating that a fuel dispensing means has been actuated by the customer for operation, said signal generation means being connected to said input channel means; and wherein said second processor control means is responsive to said control data signals from said signal generation means for transmitting control data signals instructing idlement, to said customer control means via said input channel means; and wherein said first processor control means is responsive to said control data signals instructing idlement for causing said display means to display instructions for use of said customer control means by the next customer.
3. A system according to Claim 2 wherein said signal generation means generates said control data signals upon the actuation of a mechanical switch of said dispensing means.
4. A system according to Claim 1 wherein said second processor control means instructs enablement of a selected one of said fuel dispensing means by instructing the attendant for manual enablement of said selected one of said fuel dispensing means.
5. A system according to Claim 1 wherein said attendant control means includes individual pump selection buttons manually actuable by the attendant; and communication means responsive to said second processor control means for communication with said attendant; and wherein said second processor control means is responsive to said keyboard data for actuation of said communication means for communicating with the attendant a particular pump number selected by the customer at said customer control means, said second processor control means being responsive to actuation of said pump selection buttons for instructing enablement of a selected one of said fuel dispensing means.
6. A system according to Claim 2 wherein said attendant control means includes a credit card reader operable for reading indicia carried by a credit card and for generating card coded data indicative of said indicia.
7. A system according to Claim 1 wherein said attendant control means includes visual display means responsive to display signals for visually displaying information for communicating with the attendant; and wherein said second processor control means is responsive to said second coded data signals for actuating said attendant control means that credit is unavailable.
8. A system for use in a gasoline station, or the like, for automatic enablement of fuel dispensing means from the fuel island by a customer credit card, comprising:
a plurality of fuel dispensing means for dispensement of fuel, said plurality grouped to form at least one fuel island of the gas station, each said fuel dispensing means for generating first coded data signals representative of the fuel dispensed;
customer control means located at a fuel island, including:
i. credit card reader means operable for reading indicia carried by a credit card and for generating card coded data indicative of said indicia;
ii. customer-operable keyboard means including key means for operator generation of keyboard data indicative of a selected one of said fuel dispensing means;
iii. display means responsive to display signals for visually displaying information for communicating with the customer;
iv. output channel means for transmitting and receiving control data signals away from and to said customer control means, said output channel means transmitting and receiving said data signals in a synchronous serial data protocol, said output channel means having a plurality of conductors for permitting transmissions of serial data signals in two directions, v. first processor control means connected to said credit card reader means, said keyboard means, said display means and said output channel means, said processor control means being responsive to operation of said card reader means for transmitting control data signals carrying signals representing said card coded data via said output channel means and responsive to operation of said keyboard means for transmitting control data signals carrying signals representing said keyboard data via said output channel means and responsive to control data signals received via said output channel means for displaying visual information on said display means for instructing the customer's operation of said customer control means; and attendant control means for use by the attendant of the gas station, said attendant control means being manually operable by the attendant for enabling a selected one of said fuel dispensing means, said attendant control means including:
i. data transmission means connectable to a data bank and capable of transmitting control data signals thereto and capable of receiving second coded data signals from the data bank representative of credit authorization, said second coded data signals having a valid credit state or a non-valid credit state;
ii. input channel means connected to said output channel means of said customer control means, for transmitting and receiving said control data signals from and to said customer control means said input channel means transmitting and receiving said data signals in a synchronous serial data protocol, said input channel means having a plurality of conductors for permitting transmission of serial data signals in two directions;
iii. indicator means for indicating to the attendant the value of dispensed fuel of one of said dispensing means; and iv. second processor control means connected to said fuel dispensing means, said data transmission means, said input channel means and said fuel indicator means, said processor control means responsive to certain of said control data signals received from said customer control means, for instructing said data transmission means to transmit credit card coded data to said data bank and responsive to said second coded data signals from the data bank for transmitting control data signals to said customer control means via said input channel means and responsive to certain of said control data signals from said customer control means for instructing enablement of a selected one of said fuel dispensing means and responsive to said first coded data signals for activating said indicator means, for providing an indication to the attendant of the value of dispensed fuel.
a plurality of fuel dispensing means for dispensement of fuel, said plurality grouped to form at least one fuel island of the gas station, each said fuel dispensing means for generating first coded data signals representative of the fuel dispensed;
customer control means located at a fuel island, including:
i. credit card reader means operable for reading indicia carried by a credit card and for generating card coded data indicative of said indicia;
ii. customer-operable keyboard means including key means for operator generation of keyboard data indicative of a selected one of said fuel dispensing means;
iii. display means responsive to display signals for visually displaying information for communicating with the customer;
iv. output channel means for transmitting and receiving control data signals away from and to said customer control means, said output channel means transmitting and receiving said data signals in a synchronous serial data protocol, said output channel means having a plurality of conductors for permitting transmissions of serial data signals in two directions, v. first processor control means connected to said credit card reader means, said keyboard means, said display means and said output channel means, said processor control means being responsive to operation of said card reader means for transmitting control data signals carrying signals representing said card coded data via said output channel means and responsive to operation of said keyboard means for transmitting control data signals carrying signals representing said keyboard data via said output channel means and responsive to control data signals received via said output channel means for displaying visual information on said display means for instructing the customer's operation of said customer control means; and attendant control means for use by the attendant of the gas station, said attendant control means being manually operable by the attendant for enabling a selected one of said fuel dispensing means, said attendant control means including:
i. data transmission means connectable to a data bank and capable of transmitting control data signals thereto and capable of receiving second coded data signals from the data bank representative of credit authorization, said second coded data signals having a valid credit state or a non-valid credit state;
ii. input channel means connected to said output channel means of said customer control means, for transmitting and receiving said control data signals from and to said customer control means said input channel means transmitting and receiving said data signals in a synchronous serial data protocol, said input channel means having a plurality of conductors for permitting transmission of serial data signals in two directions;
iii. indicator means for indicating to the attendant the value of dispensed fuel of one of said dispensing means; and iv. second processor control means connected to said fuel dispensing means, said data transmission means, said input channel means and said fuel indicator means, said processor control means responsive to certain of said control data signals received from said customer control means, for instructing said data transmission means to transmit credit card coded data to said data bank and responsive to said second coded data signals from the data bank for transmitting control data signals to said customer control means via said input channel means and responsive to certain of said control data signals from said customer control means for instructing enablement of a selected one of said fuel dispensing means and responsive to said first coded data signals for activating said indicator means, for providing an indication to the attendant of the value of dispensed fuel.
9. A system according to Claim 8 wherein said output channel means includes a serial input/ouput device connected to said first processor control means and responsive thereto for generating said control data signals in a serial packet.
10. A system according to Claim 9 and further including isolator means connected at the output of the serial input/output means for generating isolated control data signals.
11. A system according to Claim 9 wherein said packet includes data carrying an address identifying its associated customer terminal.
12. Apparatus according to Claim 11 wherein said packet includes error determination data, said serial input/output device utilizing said error correction data for performing an error check on said packet.
13. A system according to Claim 8 wherein said input channel means includes a serial input/output device connected to said first processor control means and responsive thereto for generating said control data signals in a serial packet.
14. A system according to Claim 13 and further including isolator means connected at the output of the serial input/output means for generating isolated control data signals.
15. A system according to Claim 13 wherein said packet includes data carrying an address identifying its associated customer terminal.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US334,692 | 1981-12-28 | ||
| US334,630 | 1981-12-28 | ||
| US06/334,692 US4395627A (en) | 1981-12-28 | 1981-12-28 | Gasoline station system for enablement of selected pumps by a credit card console located at the pump island |
| US06/334,630 US4395626A (en) | 1981-12-28 | 1981-12-28 | Gasoline station system for enablement of selected pumps by a credit card console located at the pump island |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1198822A true CA1198822A (en) | 1985-12-31 |
Family
ID=26989292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000418471A Expired CA1198822A (en) | 1981-12-28 | 1982-12-23 | Gasoline station system for enablement of selected pumps by a credit card console located at the pump island |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1198822A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6615194B1 (en) * | 1998-06-05 | 2003-09-02 | Lucent Technologies Inc. | System for secure execution of credit based point of sale purchases |
-
1982
- 1982-12-23 CA CA000418471A patent/CA1198822A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6615194B1 (en) * | 1998-06-05 | 2003-09-02 | Lucent Technologies Inc. | System for secure execution of credit based point of sale purchases |
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