US3784879A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Relay memory circuit
Assignee: American Associated Cybernetics Inc
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Filing: 1972-07-27
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Granted: 1974-01-08
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Expires: 1992-07-27
Abstract
Abstract A circuit comprised of a plurality of relays, all of which are connected in parallel. The energization of any one relay automatically deenergizes and unlatches any previously latched relay.
Inventors
- 👤 W Dukette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/001; H01H9/00; H01H9/20; H01H9/26
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
153 words
A circuit for selectively actuating a plurality of relay contacts comprising: a. a power source; b. a resistor in series with said power source; c. a relay circuit in series with said resistor and said power source, said relay circuit comprising a plurality of parallel circuits, each one of said parallel circuits comprising, i. a relay coil operatively paired with one of said relay contacts and connected at one end to one side of said one parallel circuit, ii. a maintaining relay contact, operatively associated with said relay coil and connected in series with the other end of said relay coil and the other side of said one parallel circuit, iii. switch means shunting said maintaining relay contact, and iv. current sensitive impedance means shunting said relay coil for initially shorting any previously energized relay when said switch means is closed whereby a previously energized relay is deenergized before another relay is energized.
Claim 2
Dependent Claim
153 words
A circuit for selectively actuating a plurality of relay contacts comprising: a. a power source; b. a resistor in series with said power source; c. a relay circuit in series with said resistor and said power source, said relay circuit comprising a plurality of parallel circuits, each one of said parallel circuits comprising, i. a relay coil operatively paired with one of said relay contacts and connected at one end to one side of said one parallel circuit, ii. a maintaining relay contact, operatively associated with said relay coil and connected in series with the other end of said relay coil and the other side of said one parallel circuit, iii. switch means shunting said maintaining relay contact, and iv. current sensitive impedance means shunting said relay coil for initially shorting any previously energized relay when said switch means is closed whereby a previously energized relay is deenergized before another relay is energized.
Claim 3
Dependent Claim
20 words
The circuit of claim 1 wherein said power source is a DC power source and said relays are DC relays.
Claim 4
Dependent Claim
14 words
The circuit of claim 2 wherein said current sensitive impedance means is a capacitor.
Claim 5
Dependent Claim
22 words
The circuit of claim 3 wherein said energizing means is a switch connected between ground and said other end of said relay.
Claim 6
Dependent Claim
13 words
The circuit of claim 4 which further includes a capacitor shunting said switch.
Claim 7
Dependent Claim
15 words
The circuit of claim 2 wherein said current sensitive impedance means is a light bulb.
Claim 8
Dependent Claim
22 words
The circuit of claim 6 wherein said energizing means is a switch connected between ground and said other end of said relay.
Claim 9
Dependent Claim
13 words
The circuit of claim 7 which further includes a capacitor shunting said switch.
Claim 10
Dependent Claim
23 words
The circuit of claim 7 which further includes means for maintaining said other side of said relay circuit at a potential above ground.
Claim 11
Dependent Claim
30 words
The circuit of claim 9 wherein said means for maintaining an above the ground potential comprises a zener diode connected between ground and said other side of said relay circuit.
Claim 12
Dependent Claim
13 words
The circuit of claim 10 which further includes a capacitor shunting said switch.
References Cited (Backward Citations)
US3296499A
Cited
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 |