Patent US3596831A successfully refreshed from Google Patents.
US3596831A
Expired / Lapsed
US
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Punched card verifier adapter
Assignee: Computer Utilities Corp
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Filing: 1969-07-22
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Granted: 1971-08-03
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Expires: 1989-07-22
Abstract
Abstract A control unit is added to a standard card punch for permitting the punch to operate in either of two modes, i.e., its conventional punch mode, or a verify mode wherein information previously punched on a card is compared with information which the operator keys into the card punch keyboard. If the keyboard and card-punched data do not agree, an error light is energized, the machine is caused to stop, and the keyboard locks up. The read head normally provided in the card punch for duplicating operations is used during the verify mode to read previously punched information from a card for comparison with information keyed into the keyboard.
Inventors
- 👤 William P Parmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:57
CPC Classifications
G; G06; G06K; G06K5/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
315 words
A punched card verifier adapter for converting a card punch for use as a punched card verifier, wherein said card punch includes a punch head, a keyboard, first circuit means coupling keyboard signals from said keyboard to control operation of said punch head, a duplicate read head, second circuit means coupling read head signals from said duplicate read head to control operation of said punch head, and card-feeding means for selectively advancing a card past said punch head and past said read head; said adapter comprising a multibit comparator, first switch means for disabling the first circuit means of said punch to prevent said keyboard signals from controlling operation of said punch head, said first switching means including means for coupling said keyboard signals to a first input of said comparator, second switch means for disabling the second circuit means of said punch to prevent said read head signals from controlling operation of said punch head, said second switch means including means for coupling said read head signals to a second input of said comparator, error means coupled to the output of said comparator for producing an indication of error in response to a lack of true comparison of the signals applied respectively to said first and second comparator inputs, said comparator including means responsive to the signals supplied to its first and second inputs for producing a first output signal in response to a true comparison of said input signals and for producing a second output signal, different from said first signal, in response to a lack of comparison of said input signals, said error means being nonresponsive to said first output signal and being responsive only to occurrence of said second output signal for producing said error indication, and means responsive to occurrence of said first output signal, and nonresponsive to said second output signal, for energizing the card-feeding means of said punch.
Claim 2
Dependent Claim
315 words
A punched card verifier adapter for converting a card punch for use as a punched card verifier, wherein said card punch includes a punch head, a keyboard, first circuit means coupling keyboard signals from said keyboard to control operation of said punch head, a duplicate read head, second circuit means coupling read head signals from said duplicate read head to control operation of said punch head, and card-feeding means for selectively advancing a card past said punch head and past said read head; said adapter comprising a multibit comparator, first switch means for disabling the first circuit means of said punch to prevent said keyboard signals from controlling operation of said punch head, said first switching means including means for coupling said keyboard signals to a first input of said comparator, second switch means for disabling the second circuit means of said punch to prevent said read head signals from controlling operation of said punch head, said second switch means including means for coupling said read head signals to a second input of said comparator, error means coupled to the output of said comparator for producing an indication of error in response to a lack of true comparison of the signals applied respectively to said first and second comparator inputs, said comparator including means responsive to the signals supplied to its first and second inputs for producing a first output signal in response to a true comparison of said input signals and for producing a second output signal, different from said first signal, in response to a lack of comparison of said input signals, said error means being nonresponsive to said first output signal and being responsive only to occurrence of said second output signal for producing said error indication, and means responsive to occurrence of said first output signal, and nonresponsive to said second output signal, for energizing the card-feeding means of said punch.
Claim 3
Dependent Claim
34 words
The adapter of claim 1 wherein said last-named means comprises driver means in said adapter, said adapter including means for connecting the output of said driver means to the card-feeding means of said punch.
Claim 4
Dependent Claim
13 words
The verifier adapter of claim 1 wherein said error means comprises a lamp.
Claim 5
Dependent Claim
20 words
The verifier adapter of claim 1 wherein said error means comprises means for locking the keyboaRd of said card punch.
Claim 6
Dependent Claim
44 words
The verifier adapter of claim 1 wherein said adapter includes counter means coupled to said comparator for counting the number of times a lack of true comparison has occurred, and means responsive to occurrence of said first output signal for clearing said counter means.
Claim 7
Dependent Claim
42 words
The verifier adapter of claim 5 including manually operable reset means for clearing said error means each time it produces an indication of error, and means responsive to accumulation of a predetermined count by said counter means for disabling said reset means.
Claim 8
Dependent Claim
52 words
The verifier adapter of claim 6 including normally disabled manually operable error skip means, means responsive to accumulation of said predetermined count by said counter means for enabling said error skip means, and means responsive to manual operation of said enabled error skip means for energizing the card-feeding means of said punch.
Claim 9
Dependent Claim
35 words
The verifier adapter of claim 7 wherein said error means includes means for locking the keyboard of said card punch, and means responsive to operation of said enabled error skip means for unlocking said keyboard.
Claim 10
Dependent Claim
148 words
The verifier of claim 1 wherein said card punch includes a plurality of interposer magnets, said first circuit means in said punch comprising a first plurality of interposer magnet control lines normally coupling said keyboard to said plurality of interposer magnets, and said second circuit means in said punch comprising a second plurality of interposer magnet control lines normally coupling said read head to said interposer magnets; said first and second switch means comprising movable means selectively operative to interrupt all of said first and second plurality of interposer magnet control lines at positions between said interposer magnets and said keyboard and read head, respectively, and simultaneously operative to couple said first plurality of interposer control lines from said keyboard to one of said comparator inputs and operative to couple said second plurality of interposer control lines from said read head to the other of said comparator inputs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |