US3973135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control circuit with end of cycle indication
Assignee: Duracell Inc USA
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Filing: 1975-05-12
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Granted: 1976-08-03
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Expires: 1995-05-12
Abstract
Abstract Two timing means are connected by a switching means, one of the timing means being operable to de-energize a load, the other energizing another load for a predetermined time after the first load has been de-energized.
Inventors
- 👤 Charles E. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:53
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H05; H05B; H05B6/00; H05B6/64; H05B6/66; H05B6/68
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
A control circuit comprising a power switching means; a first timing means including a power turn-off means connected to one side of said power switching means, a first load and actuation means connecting said first timing means to said first load; a second timing means including a solid state timer switch circuit utilizing a solid-state switching device connected between said one side and a second side of said power switching means; said power turn-off means further including means connected to said power switching means to actuate same; a second load, said second timing means including terminal means connecting said solid state switching device to said second load.
Claim 2
Dependent Claim
107 words
A control circuit comprising a power switching means; a first timing means including a power turn-off means connected to one side of said power switching means, a first load and actuation means connecting said first timing means to said first load; a second timing means including a solid state timer switch circuit utilizing a solid-state switching device connected between said one side and a second side of said power switching means; said power turn-off means further including means connected to said power switching means to actuate same; a second load, said second timing means including terminal means connecting said solid state switching device to said second load.
Claim 3
Dependent Claim
36 words
A control circuit according to claim 1 wherein said power switching means includes a bank of double pole switches wherein half the common poles are connected through a normally closed contact of a next succeeding switch.
Claim 4
Dependent Claim
47 words
A control circuit according to claim 1 wherein said first timing means includes a bank of switches connected to a resistor capacitor timing circuit and wherein said bank of switches is unitarily constructed with said power switching means to provide double throw, double pole, single pole switches.
Claim 5
Dependent Claim
34 words
A control circuit according to claim 3 wherein contacts of the double poles are connected to said first and second timing means and the single pole contacts are connected to said resistor-capacitor timing circuit.
Claim 6
Dependent Claim
20 words
A control circuit according to claim 1 wherein said first and second loads are a microwave oven and buzzer respectively.
Claim 7
Dependent Claim
39 words
A control means according to claim 1 wherein said power turn-off means includes a solenoid and wherein said means connected to said power switching means includes a latch bar connecting said power switching means to said power turn-off means.
References Cited (Backward Citations)
US3484769A
Cited
US3767937A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |