US3761681A - Punched card readers - Google Patents

Punched card readers Download PDF

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Publication number
US3761681A
US3761681A US00243859A US3761681DA US3761681A US 3761681 A US3761681 A US 3761681A US 00243859 A US00243859 A US 00243859A US 3761681D A US3761681D A US 3761681DA US 3761681 A US3761681 A US 3761681A
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US
United States
Prior art keywords
probes
probe
card
reader
spring wire
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
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US00243859A
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English (en)
Inventor
N Evans
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.)
Sealectro Ltd
Sealectro Corp
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Sealectro Corp
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Publication date
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Publication of US3761681A publication Critical patent/US3761681A/en
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/04—Methods or arrangements for sensing record carriers, e.g. for reading patterns by mechanical means, e.g. by pins operating electric contacts

Definitions

  • 340/149 A A reader for punched cards or tapes having a plurality [51] Int. Cl 606k 7/04, G09b 3/06, G06k 7/06, of spring mounted probes, one for each hole position. H04q 1/16 A card or tape is sensed by the probes and when no [58] Field of Search 235/6l.1l C, 61.11 B, hole is under the probe, the spring is compressed. 235/617 B, 61.6 E, 61.11 A; 200/46; 340/149 When a hole is sensed, the probe enters the hole and A; 35/48 B two electrical contacts are joined, thereby providing an electrical current which identifies the hole position in [56] References Cited 21 load circuit.
  • punched card is intended to include punched tape, punched badges, and in general any flat member that has a row or rows of holes in a coded pattern carrying information.
  • punched card readers have a pin or probe for each hole position in a row, and the carrier, in which the pins or probes must be mounted individually, is fairly complex.
  • the present invention relates to a simple and improved construction in which the probes of at least part of a'row are formed from a single spring member which is supported by a perforated plate at the portions that form the probes and a base member.
  • the springs are formed with at least one convolution between adjacent points of support.
  • FIG. I is a cross sectional view of the preferred form of the invention, showing the probes, a sample punched card, and the electrical contacts.
  • FIG. 2 is a cross sectional view similar to FIG. 1 but showing an alternate arrangement of springs.
  • FIG. 3 is a cross sectional view of a single loop to illustrate how the contact portions can be bent to provide a wiping action when contact is made.
  • a punched card or badge 1 has a row of holes 2. Not all the holes in any row will, in general, be punched out and the portion of the card illustrated has only the second, fourth and fifth possible holes actually punched out. In general, there may be any number of holes in a row and any number of rows. It is possible to provide a row of sensing probes for each row of holes in the card or badge but also possible is an arrangement in which there is but a single row of probes and the badge or card is advanced to bring each row successively into register with the probes.
  • the card 1 is, when loaded into the reader, supported on a perforated board 3.
  • a board 4 having similar perforations.
  • the board 4 may be supported by a frame and has apertures 5 that register with the holes or positions of possible holes in the row of holes that is to be sensed.
  • On the upper side of the board 4 and flanking the top of each aperture 5 are a pair of contacts 6 which may be printed circuit contacts. These contacts are connected to electrical switching circuits in known manner in order to provide signals indicating the coded information presented by the coded row of holes. Switching may be accomplished by bridging a pair of contacts 6 or by the contacting of either of the contacts as the respective probe advances through the hole 2 in the card 1.
  • a support 7 which carries a set of spaced apart rods 8 arranged transversely to the row of apertures 5 and positioned above them.
  • the insulated rods 8 support a spring wire 9 which along its length constitutes all the probes in the row and which is formed with a convolution between each point of support.
  • the spring wire 9 is formed with successive small loops 10 which are held by the rods 8. Studs couldbe used in place of the rods 8.
  • the spring wire 9 includes an arcuate part 11 leading to a folded back part 12 which constitutes the probe that is to be advanced through the possible hole in the card.
  • the folded back part l2 is flanked by two other folded back parts 13, 13a acting as flanges for the probe 12.
  • the flanges l3 and 13a are disposed at a right angle or less with the probe 12. Between the flange 13a and the next loop 10 the spring 9 has another arcuate part 14 completing a convolution between adjacent loops 10.
  • the carrier board 7, and the spring wire 9, are moved towards the support 3 or vice versa so that at least some of the probes advance through the holes in the card 1.
  • the probe parts 12 are disposed in the apertures 5 and extend down almost to the bottom of those apertures.
  • FIG. 3 This construction is shown in FIG. 3 where the probe has entered a hole in the card.
  • the spring wire 9 executes two convolutions between each adjacent pair of loops 10; the curved part 11 leads to the flange 130, the curved part 14 leads to the flange l3 and the curved parts 11 and 14 pass across each other.
  • the flanges l3 and 13a may normally touch the contacts that they bridge. Then as the head, comprising essentially the support 7, the board 4, and the wire 9, are lowered towards the card, the flanges are lifted from the respective contacts if the probe does not engage a hole and is accordingly arrested by the card. Otherwise, the probe enters a hole in the card and the flanges 13, 13a remain bridging the respective contacts 6.
  • a punched card reader comprising a plurality of sensing probes positioned in a row and formed from a single spring wire, movable support means for retaining the probes in positions above the holes in a punched data card, movable electrical contact means formed as part of the spring wire and positioned above the probes, stationary electrical contacts secured to insulator supports and disposed under said movable contact means for contact by the contact means when the movable support is lowered and a probe penetrates a hole in the card.
  • each movable electrical contact forms an angle less than a right-angle with its associated probe whereby a wiping action of the flange on its contact is obtained.
  • a reader as claimed in claim I wherein said movable support means includes a common supporting ary contacts include two conductive terminals positioned adjoining a cavity between said insulator supports through which the probe is entered.

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  • Engineering & Computer Science (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Measuring Leads Or Probes (AREA)
  • Testing Or Measuring Of Semiconductors Or The Like (AREA)
US00243859A 1971-04-08 1972-04-13 Punched card readers Expired - Lifetime US3761681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB909071 1971-04-08

Publications (1)

Publication Number Publication Date
US3761681A true US3761681A (en) 1973-09-25

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ID=9865162

Family Applications (1)

Application Number Title Priority Date Filing Date
US00243859A Expired - Lifetime US3761681A (en) 1971-04-08 1972-04-13 Punched card readers

Country Status (3)

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US (1) US3761681A (show.php)
FR (1) FR2139822B3 (show.php)
GB (1) GB1349360A (show.php)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958936A (en) * 1984-06-13 1990-09-25 Omron Tateisi Electronics Co. Electric thermometer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726348A (en) * 1924-12-09 1929-08-27 Werbelicht Ag Switch device for the production of luminous signs
US2903529A (en) * 1957-07-22 1959-09-08 Rca Corp Punched card operated apparatus
US3067299A (en) * 1960-06-02 1962-12-04 Fairchild Camera Instr Co Combination-code signal-generating apparatus
US3152247A (en) * 1961-09-20 1964-10-06 Burroughs Corp Punched card reader and switch contact
US3437794A (en) * 1963-12-17 1969-04-08 Sealectro Corp Sensing devices
US3542979A (en) * 1967-08-15 1970-11-24 Amp Inc Card reader contact assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1726348A (en) * 1924-12-09 1929-08-27 Werbelicht Ag Switch device for the production of luminous signs
US2903529A (en) * 1957-07-22 1959-09-08 Rca Corp Punched card operated apparatus
US3067299A (en) * 1960-06-02 1962-12-04 Fairchild Camera Instr Co Combination-code signal-generating apparatus
US3152247A (en) * 1961-09-20 1964-10-06 Burroughs Corp Punched card reader and switch contact
US3437794A (en) * 1963-12-17 1969-04-08 Sealectro Corp Sensing devices
US3542979A (en) * 1967-08-15 1970-11-24 Amp Inc Card reader contact assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4958936A (en) * 1984-06-13 1990-09-25 Omron Tateisi Electronics Co. Electric thermometer

Also Published As

Publication number Publication date
FR2139822A3 (show.php) 1973-01-12
FR2139822B3 (show.php) 1974-11-08
GB1349360A (en) 1974-04-03

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