Patent US3784793A successfully refreshed from Google Patents.
US3784793A
Expired / Lapsed
US
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Card reader device
Assignee: Denso Corp
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Filing: 1971-12-20
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Granted: 1974-01-08
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Expires: 1991-12-20
Abstract
Abstract A card reader device for use in a data communication apparatus such as a wire telephone or a radiotelephony equipment, which device can have one or more number cards storing subscribers'' numbers set therein, select a desired number card optionally, and read out the number code of the selected card, the data communication apparatus being furnished with no particular number code which identifies the apparatus so that the apparatus may be utilized by many unspecified subscribers.
Inventors
- 👤 K Ito
- 👤 S Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/26; H04M1/27; H04M1/274; H04M1/276; H04M1/2765
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
112 words
A device for reading the number code of a selected one of a plurality of number cards for use in a subscriber telephone system comprising; a plurality of reader circuits for detecting the code number in a corresponding plurality of number cards and for producing a signal corresponding to the respective code number of the card selected, a card selector switch circuit for selecting a card to be read, gate means enabled by said card selector switch circuit for delivering the signal output of the reader circuit selected by said card selector switch, and a memory circuit connected to said gate circuit for storing the output signal from said selected reader circuit.
Claim 2
Independent Claim
112 words
A device for reading the number code of a selected one of a plurality of number cards for use in a subscriber telephone system comprising; a plurality of reader circuits for detecting the code number in a corresponding plurality of number cards and for producing a signal corresponding to the respective code number of the card selected, a card selector switch circuit for selecting a card to be read, gate means enabled by said card selector switch circuit for delivering the signal output of the reader circuit selected by said card selector switch, and a memory circuit connected to said gate circuit for storing the output signal from said selected reader circuit.
Claim 3
Dependent Claim
35 words
The device according to claim 1, wherein said reader circuits include proximity switch means responsive to the proximity of said card for producing a signal in accordance with said stored code of said number card.
Claim 4
Dependent Claim
52 words
The device according to claim 2, wherein said proximity switch includes a reed switch and permanent magnet adjacent thereto, said reed switch affected to assume an open or closed state in accordance with the code stored in said number card when said card is interposed between said reed switch and permanent magnet.
Claim 5
Dependent Claim
34 words
The device according to claim 3, wherein said number card has a plurality of stored number codes therein and there is provided a corresponding plutality of proximity switch means for each of said numbers.
Claim 6
Dependent Claim
39 words
The device according to claim 1, wherein said gate of said card selector circuit is a NAND gate having an input controlled by said bistable means and its other gate controlled by the output of said card reader means.
Claim 7
Dependent Claim
42 words
The device according to claim 1 further including: NOR gate means responsive to outputs of said reader circuits and associated card selector switch circuits said NOR gate means for selectively gating only one of the outputs of said circuits at a time.
Claim 8
Dependent Claim
32 words
The device according to claim 1, wherein said memory circuit comprises: bistable means responsive to inputs of said reader and selector switch circuits, having at least two states for storing said inputs.
Claim 9
Dependent Claim
34 words
The device according to claim 7, wherein there is provided a memory circuit for each of a plurality of code numbers stored in said card for storing each of said code numbers for transmission.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |