US3869082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data storage and retrieval system
Assignee: Camille Bauer Messinstrumente AG
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Filing: 1973-01-29
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Granted: 1975-03-04
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Expires: 1993-01-29
Abstract
Abstract A data storage and retrieval system comprising in combination a reading device and a document card. The reading device comprises a plurality of sensing electrodes, a counter electrode and a source of alternating potential connected therebetween, the sensing electrodes being offset from said counterelectrode. The card comprises at least one conductive layer having an area in which at least one hole is adapted to be punched, and being positionable in the reading device so that the area in which the holes are adapted to be punched corresponds to the position of the sensing electrodes. The conductive layer functions as a capacitive coupling between the sensing electrodes and the counter-electrode respectively. The reading device including discriminator means is connected to the sensing electrodes by which the capacitance sensed by the sensing electrode may be derived.
Inventors
- 👤 Ludwig Ludin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:22
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/08; G06K7/081; G06K19/00; G06K19/06; G06K19/067
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
134 words
A data storage and retrieval system comprising in combination a reading device and a document card, said reading device comprising a plurality of sensing electrodes, a counter electrode and a source of alternating potential connected therebetween, said sensing electrodes being offset from said counterelectrode, said card comprising at least one conductive layer having an area in which at least one hole is adapted to be punched, said card being positionable in said reading device so that said area in which said holes are adapted to be punched corresponds to the position of said sensing electrodes, said conductive layer functioning as a capacitive coupling between said sensing electrodes and said counter-electrode respectively, said reading device including discriminator means connected to said sensing electrodes by which the capacitance sensed by the sensing electrode may be derived.
Claim 2
Dependent Claim
134 words
A data storage and retrieval system comprising in combination a reading device and a document card, said reading device comprising a plurality of sensing electrodes, a counter electrode and a source of alternating potential connected therebetween, said sensing electrodes being offset from said counterelectrode, said card comprising at least one conductive layer having an area in which at least one hole is adapted to be punched, said card being positionable in said reading device so that said area in which said holes are adapted to be punched corresponds to the position of said sensing electrodes, said conductive layer functioning as a capacitive coupling between said sensing electrodes and said counter-electrode respectively, said reading device including discriminator means connected to said sensing electrodes by which the capacitance sensed by the sensing electrode may be derived.
Claim 3
Dependent Claim
18 words
The system according to claim 1 wherein the conductive layer is sandwiched between a pair of non-conductive layers.
Claim 4
Dependent Claim
22 words
The system according to claim 1 wherein the sensors and the counter electrode are arranged on the same side of the card.
Claim 5
Dependent Claim
25 words
The system according to claim 1 wherein said discriminator is adapted to derive modulation of amplitude and/or frequency or phase angle of said alternating potential.
Claim 6
Dependent Claim
17 words
The system according to claim 4 wherein said discriminator is adapted to provide a binary pulse output.
Claim 7
Dependent Claim
32 words
The system according to claim 1 wherein at least one of said sensing electrodes is arranged by simultaneously forming a punch rod by which a hole can be punched into the card.
Claim 8
Dependent Claim
25 words
The system according to claim 6 wherein a perforated matrix is arranged on the side of said card opposite to said punch rod sensing electrode.
Claim 9
Dependent Claim
51 words
A data punch card for use in the system of claim 1 comprising at least one layer of electrical conductive material encased within a dielectric covering, said layer being provided with at least one hole and forming an insulated active electrode providing an electrically conductive path within the capacitive detecting circuit.
Claim 10
Dependent Claim
15 words
The data punch card according to claim 8 wherein only said electrical layer is punched.
Claim 11
Dependent Claim
67 words
A data punch card comprising at least one layer of electrically conductive material encased within a dielectric covering, said card being provided with at least one punch hole, the dielectric covering being of soft or malleable plastic material, which ensures upset of the plastic material in the punch area during punching operation and the covering of the inner peripheral edge of the hole in the conductive layer.
Claim 12
Dependent Claim
67 words
A data punch card comprising at least one layer of electrically conductive material encased within a dielectric covering, said card being provided with at least one punch hole, the dielectric covering being of soft or malleable plastic material, which ensures upset of the plastic material in the punch area during punching operation and the covering of the inner peripheral edge of the hole in the conductive layer.
References Cited (Backward Citations)
US2007883A
Cited
US2512879A
Cited
US2546784A
Cited
US3044694A
Cited
US3189731A
Cited
US3465131A
Cited
US3731085A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |