US3697707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Card position sensing apparatus
Assignee: International Business Machines Corp
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Filing: 1971-10-22
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Granted: 1972-10-10
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Expires: 1991-10-22
Abstract
Abstract A card position sensing apparatus for sensing the position of a record card on a card deck relative to a read/write head. The apparatus has a first follower and shunting member actuatable by the leading edge of a forwardly moving record card, and a second follower and shunting member actuatable by the leading edge of a rearwardly moving record card. Cooperating members are connected to the first and second followers for tripping the first follower to bias it against the edge of the card when the second follower is actuated and for tripping the second follower to bias it against the edge of the card when the first follower is actuated. The apparatus also has switches operable by the first and second shunting members for providing signals indicative of the position of a forwardly and rearwardly moving record card relative to the read/write head for beginning and ending a read/write operation and for activating the drive mechanism which drives the record card in the forward and rearward direction. The structural cooperation of the first and second followers which are spring biased is such that actuation and positioning of one will effect tripping of the other, providing very accurate sensing of the position of the card.
Inventors
- 👤 Kenneth Barnett Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:28
CPC Classifications
G; G06; G06K; G06K13/00; G06K13/02; G06K13/06; G06K13/067
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A card position sensing apparatus for sensing the position of a record card on a card deck relative to a read/write head, said apparatus comprising: a first angularly positionable means actuatable by the leading edge of a forwardly moving record card and positionable into contact with the side of said record card; a second angularly positionable means cooperating with said first means and actuable into contact with the side of said record card and positionable into contact with the trailing edge of said record card; and sensing means associated with said first and second means for providing signals indicative of the position of said record card relative to said read/write head.
Claim 2
Dependent Claim
111 words
A card position sensing apparatus for sensing the position of a record card on a card deck relative to a read/write head, said apparatus comprising: a first angularly positionable means actuatable by the leading edge of a forwardly moving record card and positionable into contact with the side of said record card; a second angularly positionable means cooperating with said first means and actuable into contact with the side of said record card and positionable into contact with the trailing edge of said record card; and sensing means associated with said first and second means for providing signals indicative of the position of said record card relative to said read/write head.
Claim 3
Dependent Claim
38 words
An apparatus according to claim 1 wherein said first means is actuatable by the leading edge of said forwardly moving record card for tripping said second means into contact with the side of said forwardly moving record card.
Claim 4
Dependent Claim
36 words
An apparatus according to claim 1 wherein said second means is actuatable by the leading edge of a rearwardly moving record card and is positionable into contact with the side of said rearwardly moving record card.
Claim 5
Dependent Claim
43 words
An apparatus according to claim 3 wherein said first means cooperates with said second means and is actuatable into contact with the side of said rearwardly moving record card and positionable into contact with the trailing edge of said rearwardly moving record card.
Claim 6
Dependent Claim
24 words
An apparatus according to claim 1 wherein said first and second angularly positionable means are biased against said record card when in contact therewith.
Claim 7
Dependent Claim
116 words
A card position sensing apparatus for sensing the position of a record card on a card deck relative to a read/write head, said apparatus comprising: a first means actuatable by the leading edge of a forwardly moving record card; a second means actuatable by the leading edge of a rearwardly moving record card; said second means cooperating with and trippable by said first means for a forwardly moving record card; said first means cooperating with and trippable by said second means for a rearwardly moving record card; sensing means associated with said first and second means for providing signals indicative of the position of a forwardly and rearwardly moving record card relative to said read/write head.
Claim 8
Dependent Claim
116 words
A card position sensing apparatus for sensing the position of a record card on a card deck relative to a read/write head, said apparatus comprising: a first means actuatable by the leading edge of a forwardly moving record card; a second means actuatable by the leading edge of a rearwardly moving record card; said second means cooperating with and trippable by said first means for a forwardly moving record card; said first means cooperating with and trippable by said second means for a rearwardly moving record card; sensing means associated with said first and second means for providing signals indicative of the position of a forwardly and rearwardly moving record card relative to said read/write head.
Claim 9
Dependent Claim
37 words
An apparatus according to claim 6 wherein said second means is trippable into contact with the side of a forwardly moving record card and positionable into contact with the trailing edge of a forwardly moving record card.
Claim 10
Dependent Claim
37 words
An apparatus according to claim 7 wherein said first means is tripPable into contact with the side of a rearwardly moving record card and positionable into contact with the trailing edge of a rearwardly moving record card.
Claim 11
Dependent Claim
15 words
An apparatus according to claim 8 wherein said first and second means include roller followers.
Claim 12
Dependent Claim
29 words
An apparatus according to claim 6 wherein a third means is associated with said first means for actuating a first switch forming a first part of said sensing means.
Claim 13
Dependent Claim
29 words
An apparatus according to claim 10 wherein a fourth means is associated with said second means for actuating a second switch forming a second part of said sensing means.
Claim 14
Dependent Claim
29 words
An apparatus according to claim 11 wherein said third and fourth means are magnetic shunts, and wherein said first and second switches are reed switches having magnets associated therewith.
Claim 15
Dependent Claim
18 words
An apparatus according to claim 10 wherein said third means is angularly positionable along with said first means.
Claim 16
Dependent Claim
18 words
An apparatus according to claim 11 wherein said fourth means is angularly positionable along with said second means.
References Cited (Backward Citations)
US3521033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |