US1987343A - Automatic control system for tabulators - Google Patents

Automatic control system for tabulators Download PDF

Info

Publication number
US1987343A
US1987343A US577244A US57724431A US1987343A US 1987343 A US1987343 A US 1987343A US 577244 A US577244 A US 577244A US 57724431 A US57724431 A US 57724431A US 1987343 A US1987343 A US 1987343A
Authority
US
United States
Prior art keywords
contacts
card
automatic control
circuit
tabulators
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US577244A
Other languages
English (en)
Inventor
Clair D Lake
Lowkrantz Gunne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FR744979D priority Critical patent/FR744979A/fr
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US577244A priority patent/US1987343A/en
Priority to DET41514D priority patent/DE652388C/de
Priority to GB3059032A priority patent/GB409370A/en
Application granted granted Critical
Publication of US1987343A publication Critical patent/US1987343A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Definitions

  • Record .controlled tabulators are designed to add. list and print totals of items automatically entered in the machine from control records on which the items are represented by index point perforations located in differential positions in the several card columns. each column ordinarily representing one character which may be either a number or a letter.
  • the cards are fed through the inachineauto-v matically and analyzed by suitable mechanism which in turn controls the accumulating and printing devices of the machine so that the data represented by the perforations in the card may be accumulated and printed.
  • the controlling records are usually divided into groups representing dgraderent classifications, the group classification being represented in each card by similarly located perforations and it is desirable to continue the automatic feeding of the records to the analyzing mechanism as long as the group classification does not change but to interrupt the card feed for the purpose of taking totals or performing other operations when the group changes.
  • This is ordinarily accomplished by providing two sets of brushes which are spaced apart so that one card feeds to one of them as the preceding card feeds to the other so that the same index point positions on successive cards are under the two analyzing mechanisms simultaneously.
  • Tabulators which analyze and control with the records in motion are ordinarily of the electrical type and the analyzing mechanism consists of brushes cooperating with individual contacts.
  • the cards are fed between the brushes and their cooperating contacts to hold an electric circuit open as long as there are no perforations in the card but to permit engagement of each brush with its cooperating contact through the card when it encounters a perforation on the card.
  • the automatic control system may consist of a circuit including the two sets of analyzing brushes in series and if the cards under the two sets of brushes contain identical controlling perforations this circuit will be closed at some time in the machine cycle serving to keep the card feed active to feed another card during the succeeding card feeding cycle. If the controlling perforations are not identical in successive cards, this series circuit fails to make and the machine either stops or automatically takes a total of the data entered into the accumulators.
  • the present invention contemplates a system of automatic control which is,entirely electrical in its operation and may if desired be entirely dissociated from the mechanical operations of the machine.
  • the control circuit which determines whether or not the machine shall feed cards during the successive card feeding cycle is controlled from a series of magnets, a single magnet being provided for each controlling card column which is wired in series between each of the analyzing brushes for a given card column. These magnets cooperate with their respective'armatures which serve to control the contacts in the control circuit and also control other contacts which complete holding circuits through a second winding on each magnet.
  • the several holding circuits are directed through a common line which when interrupted at a predetermined point in the machine cycle will release all of the circuits at once.
  • a modified form of the invention contemplates a third winding on the magnet through which the flow of current is directed in a reverse direction to that through the initial energizing winding and the holding circuit winding.
  • This third winding is utilized to aiiect an exceedingly rapid release of the holding circuits where the time interval between the restoration of the control contacts and their subsequent setting-up under control of the record cards is very short, so that neither the former mechanical restoration of the control contacts nor the release of the holding circuits due to opening their common line will take place in the required time.
  • the principal object of the invention is to provide an improved automatic control device for record controlled accounting machines.
  • Pig. 2 is a detail of an automatic control magnet and associated contacts.
  • Pig. 3 is an end view of Pig. 2.
  • Fig. 4 is a modified form of automatic control circuit.
  • Fig. 5 is a wiring diagram of the electric circuits of a complete tabulating machine including the improved automatic control circuits.
  • astackof cards to be analyzed is indicated at 10 (Pig. 1) which are adapted to be advanced by a picker ll operatai by an arm 12 into cooperative relationship with pairs of feeding rolla 13.
  • the picker feeds One card at a time to the rolls 13 which advance itduringonemachinecycletotheupperorcontrolanalyzingbrushesUB andduringalatermachine cycle to the lower or adding analyzing brushesLB.
  • Therollsandfeedmcchanism are driven from a shaft 14 rotated by the tabulating motor TM (shown in Fig. 5) and a gear train indicated enerally by 15.
  • the usual form of card feed clutch controlled by a clutch magnet 16' is interposed in the system to effect card feed onlyatgiventimesasiscustornaryin machines of this nature.
  • Current to the tabulating motor TM for feeding cards is supplied from a suitable source 17 (Pig. 5) which when closed, supplies current to the left side of line 18 and right side of line 19.
  • the tabulating motor TM is started in operation by depressing the start key 20. Current then nows through the motor TM, a relay 21,
  • motor relay 22 attracts its armature and establishes a stick circuit to keep the tabulator motor in operation. From the relay points 224 a line extends to the usual upper card lever contacts UCL and another line extends to earn contacts T1. T1 is also connected to cam contacts L6. After the tabulator motor has operated to a certain amount T1 closes establishing a circuit to upper contact P3. As soon as the upper card lever contacts UCL have closed another holding circuit is established from these contacts to contacts 234, stop key 24, to line 19. The card lever contacts UCL maintain the operation of the tabulator provided a relay 23 which controls contacts 23o remains energised. If either 23a, UCL or 24 are opened the tabulator will be stopped at mas the end of the cycle when cam contacts T1 open, the operation being continued up to that time.
  • the automatic control circuit 26 includes a plurality of contacts 29 any number of which may be connected in series to control from any desired card columns. These contacts are normally open and are adapted to be closed upon energisation of magnets 30 (Figs. 2 and 3). Contacis 29 and magnet 30 are both carried by a supporting bracket 31 upon which is also pivoted magnet armature 32. Armature retaining clip 33 is mounted on bracket 31. Armature 32 carries a block 34 upon which rests a pin 35 secured in the lower blade of contact 29. A second pin 36 in the lower blade of a contact 37 also cooperates with block 34. Rocking of armature 32 in a counterclockwise direction will cause concurrent closure of both contacts 29 and 3'1.
  • One unit comprising magnet 30 and contacts 29 and 37 is provided for each column from which it is desired to control the operation of the machine.
  • the several supports 31 may be mounted within the machine itself or they may be separated therefrom as desired.
  • magnet 30 is provided with windings 36 and 39, the former having both its terminals connected to plug board 40 and through suitable plug connections 41 may be wiredin seriesbetweenanupperbrushUBanda lower brush LB in the well known manner.
  • the upper and lower brushes will complete the circuit through winding '38 at a time in the operation of the machine depending upon the location of the perforations.
  • Energization of winding 38 actuates magnet armature 32 to close contacts 29 and 37. Closure of contact 37 will complete a. circuit from line 18, normally closed contact 42, wire 43, contact 37, winding 39, resistan'ce 44. wire 45 to opposite side of line 19.

Landscapes

  • Credit Cards Or The Like (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Apparatus Associated With Microorganisms And Enzymes (AREA)
US577244A 1931-11-25 1931-11-25 Automatic control system for tabulators Expired - Lifetime US1987343A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR744979D FR744979A (de) 1931-11-25
US577244A US1987343A (en) 1931-11-25 1931-11-25 Automatic control system for tabulators
DET41514D DE652388C (de) 1931-11-25 1932-10-19 Tabelliermaschine mit selbsttaetiger Kartengruppenkontrolleinrichtung
GB3059032A GB409370A (en) 1931-11-25 1932-10-31 Improvements in or relating to automatic control mechanism for record-card-controlled statistical machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US577244A US1987343A (en) 1931-11-25 1931-11-25 Automatic control system for tabulators

Publications (1)

Publication Number Publication Date
US1987343A true US1987343A (en) 1935-01-08

Family

ID=24307886

Family Applications (1)

Application Number Title Priority Date Filing Date
US577244A Expired - Lifetime US1987343A (en) 1931-11-25 1931-11-25 Automatic control system for tabulators

Country Status (4)

Country Link
US (1) US1987343A (de)
DE (1) DE652388C (de)
FR (1) FR744979A (de)
GB (1) GB409370A (de)

Also Published As

Publication number Publication date
GB409370A (en) 1934-04-30
FR744979A (de) 1933-04-29
DE652388C (de) 1937-11-01

Similar Documents

Publication Publication Date Title
US2016709A (en) Record comparing and posting machine
US1608837A (en) Tabulating-card printer device
US2683410A (en) Selective wire printing machine
US1902060A (en) Printing mechanism
US2064482A (en) Perforated record controlled machine
US2788886A (en) Tape control for line casting machines
US1987343A (en) Automatic control system for tabulators
US2770304A (en) Relay storage unit
US2105291A (en) Record card controlled machine
US2865487A (en) Record controlled printing or writing machines
US1978893A (en) Tabulating machine
US1921453A (en) Printing mechanism for accounting machines
US1787719A (en) Automatic control system
US2885146A (en) Electronic checking device
GB745482A (en) Key-controlled perforating machines
US2030432A (en) Punching mechanism
US1965981A (en) Printing control mechanism
US1763033A (en) Automatic control system
US1928209A (en) Perforated record card
US2039791A (en) Printing mechanism
US1933349A (en) Automatic control system for tabulators
US2065864A (en) Translator device for hole combinations
US2107128A (en) Paper feeding mechanism
US1946900A (en) Electric interpreter
US2181999A (en) Printing mechanism