US3321591A - Punched card reader - Google Patents

Punched card reader Download PDF

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Publication number
US3321591A
US3321591A US445385A US44538565A US3321591A US 3321591 A US3321591 A US 3321591A US 445385 A US445385 A US 445385A US 44538565 A US44538565 A US 44538565A US 3321591 A US3321591 A US 3321591A
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US
United States
Prior art keywords
pins
grooves
plate
contact
card
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
US445385A
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English (en)
Inventor
Norman R Timares
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.)
Fma Inc
Original Assignee
Fma Inc
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
Application filed by Fma Inc filed Critical Fma Inc
Priority to US445385A priority Critical patent/US3321591A/en
Priority to GB31951/65A priority patent/GB1060894A/en
Priority to DEF46864A priority patent/DE1258153B/de
Priority to SE4498/66A priority patent/SE324017B/xx
Application granted granted Critical
Publication of US3321591A publication Critical patent/US3321591A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/24—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed with timing of actuation of contacts due to a non-rotatable moving part
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Definitions

  • connector pins pass through the card whereat the holes are located and, on the other side of the card, make electrical contact in such a manner as to produce an output pattern of voltages that corresponds to the pattern of punched holes on the card.
  • the essence of that invention lies in the fact that on one end of the connector pins means are used that insure a uniform pressure on the pins, and on their other end means are employed that insure a uniform electrical contact for them.
  • a rubber-type pad is used to provide the spring action for the pins, and a single metal plate is employed for making the necessary electrical contact with them.
  • the present invention improves over this earlier punched card reader apparatus by insuring good electrical contact between the plate and the pins at all times, irrespective of the length of the period of use. More specifically, in accordance with the concept of the present invention, this is done or achieved by insuring that each connector pin contacts the metal plate at least at two points and, furthermore, that a certain wiper action will take place between these two parts before relative motion between them terminates.
  • the subject invention may be constructed in any one of several ways, in a preferred embodiment of it a series of grooves are incorporated in the plate structure, the grooves preferably extending across the full length of the plate and being shaped in such a manner that as the connector pins move through the holes of a punched card, they respectively come into contact with and wipe against one wall of the grooves, and then the other groove wall, and finally come to rest in firm mechanical and electrical contact with both walls. It is thus seen that by means of this technique, the aforementioned problems are eliminated.
  • FIGURE 1 shows a card through which a pattern of holes has been punched
  • FIGURE 2 presents a crosssectional view of a punched card reader apparatus according to the present invention
  • FIGURE 3 is a top view of the contact plate for the purpose of illustrating the several grooves therein;
  • FIGURE 4 is an enlarged view of the tip of connector pin and its associated grooves in the contact plate, and illustrates the relationship therebetween as the former moves into the latter;
  • FIGURE 5 is an enlarged view of the tip of a connector pin after it has come to rest in its associated groove in the contact plate.
  • the punched card shown in FIG. 1 the card itself being designated 10, and the holes thercthrough being designated 11.
  • the pattern in which holes 11 are arranged is in accordance with a predetermined code, while the size of and the spacing between adjacent holes respectively correspond to the thickness or diameter of the connector pins and the spacings between them.
  • the holes are arranged in columns and rows, and the discussion of the punched card reader apparatus that follows will be with this arrangement in mind.
  • the card reader is shown to include a metal contact plate 12 mounted on an insulative board 13, the plate and board combination, in turn, being fixedly mounted on a base 14 which may or may not be metal and which constitutes a part of the housing structure for the card reader.
  • contact plate 12 includes a plurality of grooves 12a with convexly curved side walls formed in its top surface, there being as many of these grooves as rows of connector pins, as will be more fully explained later.
  • a plate or board 15 Also mounted on base 14 and of the same thickness as the plate 12 and board 13 combination is a plate or board 15, board 15 being mounted on base 14 in such a manner that it overhangs the base in a cantilevered fashion.
  • the spacing between plate 12 and board 15 on theone hand and member 16 on the other hand is only enough to permit a punched or perforated card 10 to be inserted in the space therebetween, and it is for this reason that element 15 is cantilevered, namely, to facilitate the insertion of a card.
  • a punched card 10 already inserted in the space provided for it is shown in the figure.
  • member 16 has as many holes or channels through it as there are connector pins, the purpose of these channels, which are designated 17, being to protect and properly direct the movement of the pins into contact with the grooves in plate 12, as will be seen later. Accordingly, upon insertion of a card 10, holes or channels 17 come into registration with or, stated differently, respectively become positioned over all the points on the card whereat perforation-s or holes may possibly be located. Thus, a channel 17 is positioned over each spot on card 10 whereat a hole may be punched or is punched through it.
  • housing block 18 whose walls may or may not be of metal and which is movably positioned above board member 16.
  • Pinhousing block 20 is made of an insulative material and has a plurality of holes or channels 21 through it which respectively are in registration with holes or channels 17 therebeneath.
  • the connector pins, generally designated 22 are mounted in the extend through hole-s 21, with the result that there are as many of these holes 21 as there are connector pins 22 and holes 17 through board 16.
  • a rubber-type pad 23 inside housing block 18 and cemented or otherwise mounted to the surface of the top wall thereof is a rubber-type pad 23 whose function it is to apply a spring-type force to the connector pins with a minimum of cross-talk between them, specifically, a minimum between those pins that pass through punched card it and those that do not. In turn, this is done by minimizing the differential travel of the pins between their two possible positions.
  • pins 22 respectively include a thin metal rod 22a. and a shoulder or flange element 221') that abuts against the top of pin-housing block 20 when the bottom portion of .rod 22a has passed through a hole in card and come into contact with plate 12.
  • ele- 'ments 22b respectively help to limit the downward movement of the connector pins, and they are so fabricated and positioned or located on rods 22a as to control this downward travel within very fine tolerances.
  • Rods 22a are necessarily made of metal, whereas elements 221) may or may not 'be made of metal.
  • Pins 22 are rounded at their upper tips so as to reduce the possibility of damage to the pad as much as possible, and they are tapered at their bottom tips so that they can make good electrical contact with plate 12 when they are allowed to do so, as will be explained below.
  • Housing block 18 may be moved slightly up or down, that is, away from or toward board member 16, the distance through which it can be moved being only enough to raise pins 22 so that a punched card 1t may easily be inserted in the space between contact plate 12 and member 16.
  • Housing block 18 may be raised and lowered in any one of a number of ways, all of them being well known in the mechanical arts.
  • a simple lever apparatus may be coupled to the housing block 18 to manually raise or lower very much in the same mannerias a drill bit is raised or lowered in a drill press. Since the manner in which the housing block is raised and lowered involves a state-ofthe-art mechanical arrangement, it is not shown in the figure for the sake of expediency.
  • leads or wires 24 are respectively electrically connected to the pins, the leads or wires being coupled to external circuitry which does not form a part of this invention.
  • these groove extend for the full length of the plate, as is clearly shown in the view of FIG. 3, and they are tapered and rounded convexly along their sides in the manner shown in FIG. 4 so as to provide the desired wiping action and to form dual points of contact with the pins. More specifically, the shape of the grooves is detenrnined by tolerance allowances, and must meet at least three conditions, namely:
  • the groove shape must be such as to allow a minimum of cross-talk between those pins that have passed through the holes in the punched card and entered grooves 12a and those that have been prevented from doing so. As was previously mentioned, this is achieved by minimizing the differential travel of the pins in these two positions, and a proper shaping of the grooves will contribute toward a minimization of this differential travel.
  • housing block 18 in its raised posi; tion so that the space into which the car-d is inserted is free of pins 22 which might otherwise interfere with the proper insertion of the card.
  • the housing block is then lowered, and when this is done, the tips of pins 22 are brought into contact with the card which, in consequence thereof, exerts an upward or backward push on the pins. More specifically, those pins that are in registration with the holes punched through the card will be urged by rubber pads 23 to pass through the holes and make contact with plate 12, it being those pins that do not pass through the card that are pushed back by it.
  • a punched card reader comprising: a flat, rigid electrically conductive plate having long, straight grooves therein with convexly curved side walls; a plurality of electrically conductive pins perpendicularly positioned over said plate in approximate registration with the grooves thereof, said pins each being tapered at the tip adjacent said plate so as to become aligned with and make contact with both walls of said grooves when the tips thereof are moved therein; means for supporting said pins so they are axially movable and have a small lateral play suflicient to permit contact with both walls of said grooves; and means for selectively applying a pressure to said pins to move them axially into said grooves, said means including a resilient pad mounted over said pins and in contact therewith for directly applying said pressure.
  • a punched card reader comprising: a plurality of electrically conductive pins, the tip of each pin being tapered to form truncated conical sections; a flat, rigid electrically conductive plate having longitudinal grooves therein in approximate registration with the pins, said grooves having convexly curved walls so as to deflect the tips of said pins toward the centers of the grooves upon axial movement of the pins toward the grooves and to provide two points of electrical contact between a pin and its groove; means for holding each pin so it is axially movable and has a small lateral play sufiicient to permit contact with two points of its groove; and means for selectively moving said pins axially into said grooves.
  • a punched card reader comprising: a flat, rigid electrically conductive plate having longitudinal grooves therein with convexly curved side walls, said grooves being substantially parallel to each other and extending for the full length of said plate; a housing structure positioned over said plate and adapted to be selectively moved toward and away from said plate; a resilient pad mounted in said housing structure and parallel to said plate; and a predetermined number of electrically conductive pins slid,- ably mounted in said housing structure in a position that is perpendicular to both said pad and said plate with lateral play sufficient to cause contact with both sidewalls of the grooves upon sliding the pins toward the plate, said pins being arranged in substantially parallel rows that are in approximate registration with said grooves, said pins being in pressure contact with said pad at one end and being contiguous to said plate and tapered at the other end thereof.
  • a punched card reader comprising: a base structure that includes a flat, rigid electrically conductive plate in which longitudinal convexly curved grooves are formed, said grooves being parallel to one another and extending the length of the plate, a housing structure positioned over said plate, such structure including an electrically insulative wall facing said plate and having a plurality of connector-pin holes therethrough arranged in rows that are respectively in approximate registration with said grooves, an electrically conductive connector pin slidably positioned in and extending through each of said holes toward said metal plate, said connector pins each being tapered at the end facing toward said metal plate; and a rubber-like pad mounted over said pins and in contact therewith for applying a forward pressure thereto, said pins being held with sufficient lateral play that, in response to said pressure, they are forced through the holes in the punched card and into said grooves wherein they respectively make contact with both walls of said grooves; and means for spacing said base and housing structures to permit a punched card to be inserted therebetween and thereafter removed.

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)
  • Measuring Leads Or Probes (AREA)
  • Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
US445385A 1965-04-05 1965-04-05 Punched card reader Expired - Lifetime US3321591A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US445385A US3321591A (en) 1965-04-05 1965-04-05 Punched card reader
GB31951/65A GB1060894A (en) 1965-04-05 1965-07-27 Punched card reader
DEF46864A DE1258153B (de) 1965-04-05 1965-08-11 Lochkartenabtastvorrichtung
SE4498/66A SE324017B (cs) 1965-04-05 1966-04-04

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US445385A US3321591A (en) 1965-04-05 1965-04-05 Punched card reader

Publications (1)

Publication Number Publication Date
US3321591A true US3321591A (en) 1967-05-23

Family

ID=23768698

Family Applications (1)

Application Number Title Priority Date Filing Date
US445385A Expired - Lifetime US3321591A (en) 1965-04-05 1965-04-05 Punched card reader

Country Status (4)

Country Link
US (1) US3321591A (cs)
DE (1) DE1258153B (cs)
GB (1) GB1060894A (cs)
SE (1) SE324017B (cs)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US233968A (en) * 1880-11-02 Sigmusd bekgmajof
US648432A (en) * 1898-06-10 1900-05-01 Seymour C Prentiss Railway-signal.
US2389429A (en) * 1944-11-17 1945-11-20 William B Griffith Thermostat
US2924685A (en) * 1957-09-26 1960-02-09 Gen Electric Magnetic switch
US3144525A (en) * 1962-10-29 1964-08-11 Fma Inc Punched card reader
US3168635A (en) * 1962-12-31 1965-02-02 Chalco Eng Corp Assembly of elements for making intermittent electrical contact

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2111117A (en) * 1934-03-20 1938-03-15 Ibm Perforated record controlled machine
US2258290A (en) * 1936-05-13 1941-10-07 Western Electric Co Computing machine
GB623283A (en) * 1945-11-19 1949-05-16 Ibm Improvements in or relating to perforated record card controlled machines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US233968A (en) * 1880-11-02 Sigmusd bekgmajof
US648432A (en) * 1898-06-10 1900-05-01 Seymour C Prentiss Railway-signal.
US2389429A (en) * 1944-11-17 1945-11-20 William B Griffith Thermostat
US2924685A (en) * 1957-09-26 1960-02-09 Gen Electric Magnetic switch
US3144525A (en) * 1962-10-29 1964-08-11 Fma Inc Punched card reader
US3168635A (en) * 1962-12-31 1965-02-02 Chalco Eng Corp Assembly of elements for making intermittent electrical contact

Also Published As

Publication number Publication date
SE324017B (cs) 1970-05-19
DE1258153B (de) 1968-01-04
GB1060894A (en) 1967-03-08

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