US3024945A

US3024945A - Control mechanism for fluid dispensing device

Info

Publication number: US3024945A
Application number: US796536A
Authority: US
Inventors: Charles D Erickson
Original assignee: AO Smith Corp
Current assignee: Geosource Inc
Priority date: 1959-03-02
Filing date: 1959-03-02
Publication date: 1962-03-13
Anticipated expiration: 1979-03-13

Description

March 13, 1962 C. D. ERICKSON CONTROL MECHANISM FOR FLUID DISPENSING DEVICE Filed March 2, 1959 3 Sheets-Sheet 1 FIGJ.

INVENTOR. [CHARLES E. ERICKSUN Qvftorneqs March 13, 1962 c. D. ERICKSON 3,024,945

CONTROL. MECHANISM FOR FLUID DISPENSING DEVICE 3 Sheets-Sheet 2 Filed March 2, 1959 IN VENTOR. EHAELEE 1U. ERIGKSUN 2A4 g/ZZTAE oqftornegs March 13, 1962 c. D ERICKSON CONTROL MECHANISM FOR FLUID DISPENSING DEVICE 3 Sheets-Sheet 3 Filed March 2, 1959 INVENTOR. EI-IARLEs 1U- EHIBKSUN XWRDQQ DU Oqffornegs United States Patent 3,024,945 CONTRQI. MECHANISM FOR FLUID DISPENSING DEVICE Charles I). Erickson, Arcadia, Caiiil, assignor to A. 0. Smith Corporation, Milwaukee, Wis, a corporation of New York Filed Mar. 2, 1959, Ser. No. 796,536 14 Claims. (Cl. 222-33) This invention relates to a fluid dispensing device having a discharge control means which is adapted to control the operation of the dispensing device and insure correct actuation of the device and is particularly directed to a conventional gasoline dispenser having a nozzle hook support interlocked with the operating mechanism of the dispensing device.

The conventional gasoline dispensing unit employed for delivering gasoline to the vehicles of the consuming public includes a delivery nozzle which is connected by a suitable length of hose to the output of a fluid pump. A switch hook is provided to support the nozzle when the latter is not in use.

In recent gasoline dispensers, the switch hook includes an integral lever to start the motor-pump unit of the dispensing device and to trigger or condition a computing and registering device. To prevent mistaken or fraudulent successive deliveries of fluid, the computing and registering device normally includes a separate reset mechanism which must be actuated after the motor-pump unit is de-energized before the motor-pump unit can be again actuated.

Generally, the present nozzle hooks permit the return of the nozzle without discontinuing fluid delivery or return of the'switch hook to the off position. Consequently, the operator may intentionally or unintentionally return the nozzle without stopping the fluid dispensing pump. Subsequently a delivery may then be made which is additive to the previous delivery or deliveries and the customer defrauded.

Further, computers having the present known positive interlocks can be severely damaged or destroyed if the operator, accidently or intentionally, forcibly actuates the switch hook to initiate a cycle without first actuating the reset mechanism.

In accordance with the present invention, 'a nozzle member is supported upon a nozzle supporting member by a suitable cooperating opening or recess and projection carried by the respective members. The projection and recess extend vertically in the normal supporting position. However, when the nozzle supporting member is turned to the on-position, the projection and recess or opening extend angularly downwardly and consequently positively prevent return of the nozzle to the support without returning the members to the oil-position and stopping the gasoline dispenser.

In accordance with another aspect of the invention, the motor-pump switch mechanism is interconnected with the nozzle supporting member such that only the final movement of the supporting member actuates the dispensing unit. Further, the initial return movement of the supporting member deactivates the dispensing unit. The computing and registering device is also connected to the supporting member such that the initial return movement of the supporting member conditions the computing device to prevent return to the on-position without prior resetting. Consequently, the supporting member cannot be partially returned to the off-position in order to return the nozzle to the hook member without turning off the dispensing unit and establishing the computing and/or registering unit to a condition requiring actuation of the reset mechanism.

In accordance with another aspect of the present inven- Patented Mar. 13, 19fi2 tion, a safety mechanism is interposed in the actuating lever connection for conditioning the computer. The safety mechanism includes a releasable connection having means which are pro-stressed in opposition to the stress resulting from the application of an operating force applied to the actuating member. The pre-stress is greater than the normal force required to correctly actuate the dispensing unit and less than the force which would normally damage the computing mechanism. The releasable connection is responsive to a predetermined abnormal force on said member to establish independent movement of the member with respect to the computer and the starting switch mechanism for the dispensing unit. The dispensing unit cannot then be started without prior actuation of the reset mechanism for the computer and it becomes impossible for the dispenser operator or owner to defraud purchasers or to damage the apparatus in the operation of the dispensing unit.

The drawings furnished herewith illustrate the best mode presently contemplated for carrying out the inven-v FIGURE 4 is a fragmentary top view of FIGURES 2 and 3; and

FIGURE 5 is an illustration similar to FIGURE 2 with the control switch thrown to the on-position.

Referring to the drawings and particularly to FIGURE 1, a gasoline dispenser is shown including an outer housing or casing 1 which is mounted on the ground or other suitable support 2. A motor-pump unit 3 is supported within the housing 1 and connected to a storage vessel 4 which is normally buried in the ground. A large quantity of gasoline 5 is maintained in the storage vessel 4 and successively removed through the dispenser by selective operation of the motor-pump unit 3. A suitable hand operated nozzle valve 6 is connected to the output of the motor-pump unit 3 to deliver the gasoline to the conventional gasoline engine vehicle, not shown. A fluid meter 7 is interposed between the motor-pump 3 and the delivery nozzle valve 6 to detect the quantity of fluid flow from the dispenser. The output of the fluid meter 7 is connected to the input of a suitable computer 8 which is adapted to record the volume and normally the price, based on a per unit volume basis of the fluid delivered from the dispenser. The volume delivered and total price i the indicating wheels and the corresponding operating elements to an initial zero delivery setting, for example, such as shown in United States Patent 2,594,853 which issued to Bliss. Only the necessary external operating interconnections to the computer 8 and the structure of the preferred embodiment of the present invention are described and shown in detail in the present application.

A manually operated indicating wheel reset lever 11 is connected by a suitable computer mechanism, not

shown, to the computer wheels. The reset lever 11 is mounted on the exterior side of the housing 1 and is connected by a shaft 12 to the computer mechanism 8 to reset the wheels to the zero or no delivery position upon suitable pivoting of the lever II and the attached shaft 12.

The shaft 12. is journaled or supported within a wall 13 which is secured within the pump dispenser housing I.

Referring to FIGS. 2-5, a computer triggering or conditioning lever 14 is disposed within the dispenser housing 1 and is connected to the computer mechanism by a shaft 15. The lever 14 is adapted to condition the computer for operation in any suitable manner such as shown in the previously referred to Bliss Patent 2,594,853. Further, within the computer 8, the operating mechanism includes an interlock between the reset lever 11 and the triggering lever 14 which requires that the reset lever must be actuated subsequent to the initial return of the triggering lever 14, in whole or in part, to the normal oif-position, as shown in FIG. 1.

The triggering lever 14 is connected by a rigid link 16 to an interconnecting actuating assembly 17 mounted within the outer housing 1 of the dispenser.

Referring particularly to FIGURES 2 and 3, the actuating mechanism 17 includes a bearing bracket 18 which is rigidly bolted to a supporting wall, not shown, within the dispenser housing 1. An operating shaft 20 is journaled within the bearing portion 21 of the bracket 18 and extends outwardly through a suitable opening in the side of the dispenser housing 1. An on-otf hook lever is provided with an integral hub 23 which is releasably secured to the outer end of the shaft 2t? by a set screw 24. The on-olf arm 22 is adapted to actuate the operating components of the actuating assembly 27. The onoff arm 22 is a relatively long arm to establish a large moment arm and provide easy positioning of the arm and attached shaft 20.

A radially extending nozzle hook 25 is integrally formed with the hub 23 of the arm 22. The book 25 is generally a flat plate-like member having the principal plane extending through the axis of shaft Hook 25 is angularly arranged with respect to arm 22 such that the hook 25 extends vertically upwardly with the arm 22 in the normal oif-position, as shown in FIGURES 24.

Referring particularly to FIGURE 1, the nozzle 6 in-' cludes a conventional encircling finger guard 26 which extends laterally from the nozzle. A slot 27, generally corresponding to the configuration of the periphery of the nozzle hook 25, is provided in the lateral portion of the trigger guard. The nozzle 6 is supported upon the hook 25 when not in use by cooperative engagement of hook 25 and slot 27. A spout tube 28 projects forwardly from the nozzle 6 and is disposed within a suitable boot 29 in the side wall of the dispenser housing 1 to more adequately support the nozzle 6, as generally shown in FIGURE 1.

To condition the dispenser for delivery of the gasoline, the nozzle 6 is removed from the hook 25 and the arm 22 is rotated to the on-position, shown in FIGURE 5. In the on-position, the nozzle supporting hook 25 extends downwardly and it is absolutely impossible to replace the nozzle 6 onto the hook 25 until the arm 22 has been at least partially returned to the off-position. As hereinafter described, the initial movement of the arm 22 and hook 25 from the operating position, stops the motorpump unit 3 and consequently the nozzle 6 cannot be replaced in the normal supported position without stopping of the dispenser.

Referring particularly to FIGURES 2-4 the actuating assembly 17 is simultaneously moved incident to movement of arm 22 which is secured to shaft Ell. The assembly 17 includes a lever arm 30, which is secured to the innermost end of shaft 20 by a suitable key or the like for simultaneous positioning of the arm 31 with arm 22. A pawl 31 is pivotally secured to the outer end of the lever arm 30 by a pin 32 which is press fitted or otherwise rigidly secured in an opening in the one end of the pawl 31 and extends through a suitable bearing opening in the outer end of lever 30. A fiat washer and cotter pin 33 pivotally secure the shaft pin 32 within the bearing opening.

A latch pin 34 is press fitted or otherwise rigidly secured within a suitable opening in the outer end of the pawl 31 and extends outwardly parallel to the shaft 20 over the periphery of a disc-shaped control lever 35. The latch pin 34 also extends inwardly of the housing and is circumferentially grooved at the innermost end to receive one end of a coil spring 36.

Suitable books

37 and 38 are provided on opposite ends of coil spring 36. The spring hook 37 is disposed within the groove n latch pin 34 and the spring 36 extends generally radially of the disc-shaped control lever 35. The opposite spring hook 38 is secured to a pin 39 which is secured to the lever arm on the opposite side of shaft 20 from the pin 34 and pawl 31. The spring 36 is stressed in tension and biases the latch pin 34 into engagement with the periphery of the disc-shaped control lever 35.

The disc-shaped lever is centrally journaled on the shaft 2i) for free rotation about shaft 20. A peripheral groove or notch 4% is formed on lever 35 for receiving the latch pin 34. The spring 37 normally holds the pin 34 Within the notch 40 and consequently establishes corresponding pivotal movement of the lever arm 3%) and the disc-shaped lever 35 incident to the pivotal actuation of the on-oif arm 22- and shaft 20.

The disc-shaped lever 35 is secured to the triggering lever 14 of computer 8 by the previously noted connecting link 16. The link 16 is pivotally secured to the disc-shaped lever 35 by an adjustable connector 41 which is threadedly secured to the adjacent end of the links 16. The rotation of the disc-shaped lever 35 incident to movement of the on-oif arm 22 correspondingly positions the triggering lever 14- between an operating position, shown in FIGURE 5, and a non-operating position, shown in FTGURES 24.

As previously described, computer 8 is constructed such that the illustrated reset lever 11 must be separately and individually actuated after return of the triggering lever 14- to the nonoperating position shown in FIG- URE 2. if the reset lever is not actuated, the internal mechanism of the computer 8 prevents movement of the triggering lever 14 to the on-position shown in FIGURE 5 Without damaging the computer.

In accordance with the illustrated embodiment of the invention, if the computer is in a non-reset position such that the computer triggering lever 14 and reset lever 11 are locked together to prevent movement of the triggering lever 14 an abnormal and damaging force cannot be applied to lever 14 through mechanism 17 and arm 22. Any abnormal pressure applied to the arm 22 is transmitted to the coil spring 36 and overcomes the tension force in the coil spring. The latch pin 34 then rides out of the peripheral notch 40 in the disc-shaped ever 35. The on-otf arm 22 moves independently and harmlessly of the control lever 35. Consequently, excessive force cannot be applied to the computer 8 and damage to the mechanism is prevented.

Referring particularly to FIGURES 2 and 3, a stop pin 42 is rigidly secured within a supporting embossment 43 on the inner surface of the bearing bracket 18 and extends outwardly over the periphery of the disc-shaped lever 35. With the latch pin 34 disposed within the peripheral notch the mechanism is moved past the pin 42. However, when the latch pin 34 rides out of the notch 40, the pin 34 moves into engagement with the pin 42 and limits the rotation of the arm 3i) and attached onotf arm 22.

A radial protrusion 44 is integrally formed on the outermost trailing portion of the pawl 31. A stop mem' ber 45 is integrally formed on the inner surface of bracket 18 and lies in the angular path of protrusion 44. If excessive force is applied to arm 22 after movement to the on-position and the pin 34 rides out of notch 48, the protrusion engages member 45 to limit the movement of the lever 22 and intermediate components.

The motor-pump unit 3 is electrically interlocked to the disc-shaped control lever 35 such that the motor is started incident to the final movement of the control arm 22 to the on-position and is stopped incident to the initial movement of the arm 22 from the on position to the offposition.

Referring particularly to FIGS. l-3, a switch 46 for the motor'pump unit 3 is mounted within the dispenser housing 1 in vertically spaced relation to the actuating assembly 17. A generally U-shaped switch member 47 is journaled within the wall of the switch 46 and protrudes vertically upwardly. A connecting rod 48 is secured at one end within the U-shaped switch actuator 47 by a cotterpin 59. The opposite end of the connecting rod 48 is pivotally connected to the control lever 35 by an adjustable nut type connector 5%, which threads onto the end of the rod 48. The connector 50 includes a laterally extending pin 51 which extends through an arcuate slot 52 in the lower portion of the control lever 35 opposite from the latching notch 40. The pin 51 is slidably secured within the slot 52 by a cotterpin 53 which extends through the outer end of lateral pin 51.

The slot 52 extends circumferentially of the lever 35 for a distance generally somewhat less than the angular movement of arm 22. The adjustable connector 50 is positioned on the connecting rod 48 to dispose the lateral pin 51 immediately adjacent the leading end of slot 52 and consequently spaced from the trailing end of the slot 52 by a distance slightly less than the angular movement of the arm 22 and the corresponding angular movement of the control lever 35. The initial movement of the on-ott arm 22 does not consequently affect the position of switch 46. However, immediately prior to the final angular positioning of arm 22, the trailing end of the slot 52 engages the pin 51 and the final angular movement of the arm 22 is transmitted through the pin 51 and rod 48 to the switch actuator 47, as shown in FIG. 5. The switch actuator 47 is withdrawn with respect to the switch 46 and closes contacts, not shown, within the switch 46 to energize the motor-pump unit 3. The switch 46 is held in the closed position until such time as the disc-shaped lever 35 is rotated back to the initial position and the trailing edge of slot 52 disengages the connecting pin 51.

Consequently, the motor-pump unit 3 can only start in response to normal operation of the actuating assembly l7. Abnormal operation of the actuating assembly 17 whereby the arm 22 moves independently of control lever 35 as previously described is inefiective to start the motor-pump unit 3. Further, the initial movement of the arm 22 from the on-position and the consequent initial counter rotation of the control lever 35 disengages the trailing end of slot 52 and allows the switch 46 to return to the normally open position to immediately discontinue the operation of the motor-pump unit 3. Consequently, it is impossible to allow or maintain operative condition of the dispenser unit and still return the nozzle 6 to its normal supported position upon the nozzle hook 25.

The operation of the illustrated embodiment of the invention is summarized as follows.

The nozzle 6 is removed from the nozzle hook 25 and the on-otf handle 22 is rotated from the oil-position to the on-position, as shown in FIG. 5. The nozzle book 25 now projects downwardly and the nozzle 6 cannot be replaced until the arm 22 is returned, at least partially, to the oil-position.

The angular movement of the control arm 22 is transmitted through the pawl 31 and pin 34 to the discshaped lever 35. The rotation of lever 35 pulls on link 16 and angularly positions the triggering lever 14 to the recording position, shown in FIG. 5. The final movement of the disc-shaped lever 35 also closes the motor switch 46 and energizes the motor-pump unit 3 to allow discharge or dispensing of the gasoline from the dispenser unit 1 by actuation of the nozzle 6. After the desired quantity of fluid has been dispensed, the on-oif 6 arm 22 must be rotated, at least partially, back to the otf-position in order to return the nozzle hook 25 to a vertically upwardly extending position for supporting the nozzle 6. The initial movement of the on-ofr arm 22 from the on-position causes the switch 46 to open and the motor-pump unit 3 consequently is de-energized.

The initial movement of arm 22 also correspondingly begins the initial angular return movement of the triggering lever 14 of computer 8 to the initial non-operating position. The lever 14 cannot be again turned to the operating position until the reset lever ll has been actuated and the interlock is re-established coincident with the stopping of the dispenser.

If the operator forces the arm 22 to move to the onposition prior to resetting of the computer 8 by actuation of reset lever 11, the latch pin 34 rides out of the peripheral notch 46 and allows free and non-operative movement of the arm 22 with respect to the disc-shaped lever 35, as previously described.

lr arm 22 has been forced to the on-position prior to resetting of computer 8, the dispenser is returned to operative condition by returning the handle 22 to the normal oil-position and thereby eliecting engagement of the latching pin 34 and the peripheral notch 46). The reset lever 11 is then actuated and normal dispenser procedure followed.

The interlocking control and actuating apparatus of the present invention may also be applied to a remotely located control in a fluid dispensing system by a suitable inter-connecting linkage from the actuating assembly to the actuating component of the valve.

The present invention provides a positive safety control for successive actuation of dispensing devices and the like. The control positively prevents mistaken and fraudulent operation of the device in the normal course of dispensing products.

Various modes of carrying out the invention are contemplated as being within the scope of the following claims, particularly pointing out and distinctly claiming the subject matter which is regarded as the invention.

I claim:

1. A control mechanism for a dispenser having a movable nozzle and having a recorder including separate triggering means and resetting means, said means being interlocked to require operation of the resetting means prior to operation of the triggering means, which comprises a nozzle supporting and recorder operating member having an oil-position and an on-position, said operating member and said nozzle including cooperating hook members arranged to support said nozzle in the off-position of the operating member and arranged in a non-supporting nozzle position in the on-position of the operating member, and a releasable connector joining said member and the recorder triggering means to condition said recorder incident to movement of the member to the onposition, said releasable connector including means stressed in opposition to the stress established incident to an operative on-force applied to said member and responsive to a predetermined on-force on said member for establishing non-actuating independent movement of said member with respect to said triggering means.

2. A control mechanism for a motor operated fluid dispenser having a movable nozzle and having a computer including separate conditioning means and resetting means, said means being interlocked to require operation of the resetting means prior to operation of the conditioning means, which comprises a nozzle supporting and computer operating member having an oil-position and an on-position, said member and said nozzle including cooperating hook means arranged to support said nozzle in the oil-position of the operating member and arranged in a non-supporting nozzle position in the on-position of the member operating, switch means controlling the operation of the motor of the fluid dispenser, and a releasable connector joining said member and the computer conditioning means and the switch means to condition said computer for operation and to operatively actuate said switch means to operate the motor incident to movement of the member to the on-position, said releasable connector including means stressed in opposition to the stress established incident to an operative on-force applied to said member and responsive to a predetermined on-force on said member for establishing independent non-actuating movement of said member with respect to said conditioning means and said switch means.

3. A control mechanism for an electrically operated fluid dispenser having a movable nozzle and having a computer including separate conditioning means and resetting means, said means being interlocked to require operation of the resetting means prior to operation of the conditioning means, which comprises a nozzle supporting and computer operating member having an oilposition and an Oil-POSlllOII, said member and said nozzle including cooperating hook members arranged to support said nozzle in the off-position of the operating member, said operating member moving the corresponding hook member to a non-supporting nozzle position in the on-position of the member, circuit means including a movable member to control the energization of said electrically operated fluid dispenser, and a releasable connector joining said operating member and the computer conditioning means and the movable member of the circuit means to condition said computer incident to movement of the member to the on-position and operatively complete the circuit means incident to final movement of the operating member and to operatively open the circuit means incident to initial return movement of the operating member, said releasable connector including means stressed in opposition to the stress established incident to an operative on-force applied to said member and responsive to a predetermined on-force on said member for establishing independent non-actuating movement of said member with respect to said conditioning means.

4. A control mechanism for a motor operated dispenser having a generally gun-shaped delivery nozzle and having a recorder including separately actuated conditioning means and resetting means, said conditioning means and resetting means being interlocked to require actuation of the resetting means prior to actuation of the conditioning means, which comprises pivotal support means, a nozzle supporting and dispenser control arm secured to said pivotal support means, said control arm having a first actuating position extending generally horizontally and including a vertically upstanding projection, said arm having a second position disposing said projection in a vertically depending position, said nozzle having an opening for slidably accommodating the projection to support the nozzle, switch means including a movable contact to control the motor of said motor operated dispenser, a rotatable disc mounted on said pivotal support means and connected to actuate said conditioning means, spring loaded means releasably connecting said pivotal support means and said rotatable disc for establishing coincident movement, said spring loaded means being responsive to a predetermined abnormal pressure transmitted through said pivotal support means for establishing independent movement of the pivot members relative to said rotatable disc, and switch actuating means on said rotatable disc for actuating said switch during the final movement of the disc corresponding to the movement of the arm to the second position and the initial movement of the disc corresponding to the movement of the arm from the second position.

5. A control mechanism for a motor-operated dispenser having a generally gun-shaped delivery nozzle and having a recorder including separately actuable conditioning means and resetting means, said conditioning means and resetting means being interlocked to require actuation of the resetting means prior to actuation of the conditioning means, which comprises pivotal means, a nozzle supporting and dispenser control arm secured to said pivotal means and having a first position extending generally horizontally from said pivotal means and including a projection extending vertically from said pivotal means incident to locating the arm in the actuating position, said arm having a second position disposing said projection in a vertically depending position, switch means including a movable contact to control the motor of said motor-operated dispenser, said pivotal means including a rotatable shaft, a rotatable disc journaled on said shaft and connected to said conditioning means, a lever secured to said shaft adjacent the rotatable disc for simultaneous rotation with said shaft, a pawl pivotally secured to the outer portion of the lever and having a pin-like portion overlying the periphery of said disc, a coil spring secured to said pin-like portion and said lever to bias said pin-like portion into engagement with the periphery of said disc and releasably interlock the lever and disc for corresponding movement incident to normal pressures on said lever, said pin-like portion riding out of said notch incident to the presence of a preselected abnormal pressure on said lever for establishing indcpendent movement of the lever with respect to said disc, a circumferential slot in said disc, and means connecting said movable contact to the leading portion of the slot and spaced from the trailing edge of the slot slightly less than the corresponding normal angular movement of the disc to respectively start and stop the motor during the final on-position movement and the initial off-position movement of said control arm.

6. A control mechanism for a dispenser having a computer with a reset means and a separate conditioning means, said reset means and conditioning means being interconnected to require actuation of the reset means prior to actuation of the conditioning means, which comprises a control arm mounted for selective movement between a first position and a second position, a resilient connector joining said control arm and said conditioning means and stressed for establishing simultaneous movement of the conditioning means incident to movement of the control arm, said stress being selected to be less than the stress established by the application of a predetermined abnormal force to the control arm and the interconnected conditioning means of said computer for establishing independent movement of the control arm with respect to the conditioning means incident to establishment of the abnormal force.

7. A control mechanism for a fluid dispenser having a housing and having a computer disposed within the housing and having a computer reset means disposed externally of the housing and a separate computer conditioning means within the housing, said reset means and conditioning means being interconnected to require actuation of the reset means prior to actuation of the conditioning means, which comprises a control arm mounted externally of the housing for selective movement between a first position and a second position, a resilient connector disposed within the housing and including a pivotal lever joined to said control arm and a rotatable disc member joined to said conditioning means, a pawl having a latch member pivotally secured to one of said connector members, a notch formed in the opposite member, and a spring secured to the pawl and stressed to hold the pawl within the notch for establishing simultaneous movement of the conditioning means incident to movement of the control arm, said stress being selected to be less than the stress established by the application of predetermined abnormal force to the control arm and the conditioning means prior to actuation of the reset means.

8. A control mechanism for a dispenser having a computer with an actuable conditioning means and release means to hold said conditioning means in a non-actuable position, which comprises a control arm mounted for selective movement between a first position and a second position, a resilient releasable connector joining said control arm and said conditioning means and stressed for establishing simultaneous movement of the conditioning means incident to movement of the control arm, said stress being selected to be generally opposed to and less than the stress established by the application of predetermined abnormal force to the control arm and the conditioning means prior to actuation of said release means.

9. A control mechanism for a dispenser having a computer with a reset means and a separate conditioning means, said reset means and conditioning means being interconnected to require actuation of the reset means prior to actuation of the conditioning means which comprises a control arm mounted for selective movement between a first position and a second position, a first pivotal member connected to said control arm to pivot between a first position and a second position incident to corresponding movement of said control arm, a second pivotal member connected to operate the conditioning means, a latch member rigidly secured to one of said pivotal members for movement therewith for engaging the other of said pivotal members and for establishing simultaneous movement, and resilient means operatively connected to said latch member and biasing said latch member into connecting engagement with the other of said pivotal members to transmit control arm movement to said conditioning means, the force applied to said control arm tending to overcome the force of said resilient means whereby the force transmitted to said conditioning means is maintained below a pre-selected level.

10. A control mechanism for a fluid dispenser including a housing and having a computer disposed within the housing with an external reset means and a separate internal conditioning means, said reset means and conditioning means being interconnected to require actuation of the reset means prior to actuation of the conditioning means, which comprises a shaft mounted within the housing and extending outwardly thereof, a control arm mounted for selective movement between a first position and a second position on the outer end of said shaft, a pivotal member connected to the inner end of the shaft to pivot with said control arm, a second pivotal member freely journaled on the shaft and connected for operating the conditioning means, a latch member pivotally secured to one of said pivotal members, the other of said pivotal members including a notch to receive a portion of the latch member, and resilient means connected to said latch member and to the corresponding pivotal member and biasing said latch member into said notch for transmitting control arm movement to said conditioning means, the force applied to the said control arm tending to overcome the force of said resilient means whereby the force transmitted to said conditioning means is maintained below a preselected level.

11. A control arm and nozzle support for a fluid dispensing nozzle having a supporting opening, which comprises a pivotal member mounted for angular positioning between an on-position and an off-position, means connecting said member to the control for the fluid moving means for establishing fluid flow incident to movement of the member to the on-position, and a nozzle hook secured to the member and disposed in vertically upstanding direction with the member in an off-position for slidably accommodating the opening and supporting the nozzle and in vertically depending direction incident to pivotal movement of the member to the on-position for preventing supporting of the nozzle.

12. A control arm and nozzle support for an electrically controlled fluid dispenser having a delivery nozzle, which comprises a pivotal shaft mounted for angular positioning between an on-position and an off-position, separated by more than ninety degrees and less than 270 degrees, means connecting said shaft to the electrical control for the fluid dispenser to condition the dispenser for fluid flow incident to the final movement of the shaft and to disenable the dispenser incident to initial return movement of the shaft to the on-position, and a nozzle hook secured to the shaft and disposed in vertically upstanding direction with the shaft in an off-position for slidably accommodating the opening and supporting the nozzle and in vertically depending direction incident to pivotal movement of the shaft to the on-position for preventing supporting of the nozzle.

13. A control-arm and nozzle support for an electrically controlled fluid dispenser having a delivery nozzle having a supporting opening, which comprises a pivotal member mounted for angular positioning between an onposition and an off-position separated by at least ninety degrees, means connecting said member to the electrical control for the fluid dispenser for conditioning the dispenser for fluid flow incident to movement of the member to the on-position and to prevent fluid flow incident to the initial return movement of said pivotal member, and a nozzle hook secured to the member and disposed in vertically upstanding direction with the pivotal member in the offposition for slidably accommodating the opening and supporting the nozzle and in vertically depending direction incident to pivotal movement of the member to the on-position for preventing supporting of the nozzle.

14. A control arm and nozzle support. for an electrically controlled fluid dispenser having a delivery nozzle, which comprises a pivotal shaft extending outwardly of the dispenser housing and being rotatably mounted for angular positioning between an on-position and an olfposition separated by a substantial angle, a nozzle support secured to the shaft for supporting the nozzle only with the shaft in the off-position, and a rotatable disc means having an angular slot and pin connector joining said shaft and the switch means for the electrical control of the dispenser, said pin and slot connector being arranged to allow rotation of the disc means independently of the switch means during substantial movement of the pivotal shaft with respect to the off-position and operatively couple the disc means and switch means during the pivotal shaft movement immediately adjacent the on-position.

References Cited in the file of this patent UNITED STATES PATENTS 2,311,193 Willson Feb. 16, 1943 2,742,186 Mitnik Apr. 17, 1956 2,942,759 Wright June 28, 1960