US3846607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Programming circuit for microwave ovens
Assignee: Individual
•
Filing: 1972-04-03
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Granted: 1974-11-05
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Expires: 1992-04-03
Abstract
Abstract An electrical circuit is disclosed for microwave heating apparatus including means for varying cooking cycles programmed on the basis of food or product-type. Automatic control means are provided by timing circuits and selector means and constant or intermittent operation is permitted with programmed ''''on-off'''' cycling of the microwave energy source. Multiple tap RC circuit means as well as logic circuit means are illustrative programming circuit embodiments. Solid state components and printed circuit techniques provide compactness as well as dependability in operation.
Inventors
- 👤 A Bucksbaum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:16
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/6435; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H05B6/66; H05B6/666; H05B6/68; H05B6/687; H05B6/72; H05B6/725
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
In combination; a voltage source; an electRomagnetic energy generator; and an electrical circuit to operate said energy generator connected to said voltage source; said circuit including means for automatically controlling the operation cycles; said means comprising; timing circuit means including serially connected resistances each having substantially the same value and a fixed capacitance for programming predetermined total time cycles of operation by electrically interconnecting a predetermined number of said resistances to said capacitance to collectively add to the required total resistance values to achieve the desired operation time; selector switch means operatively associated with said timing circuit means to select each desired operation cycle; and solid state means coupled to said timing circuit means for releasing said selector means upon completion of a desired programmed cycle.
Claim 2
Dependent Claim
126 words
In combination; a voltage source; an electRomagnetic energy generator; and an electrical circuit to operate said energy generator connected to said voltage source; said circuit including means for automatically controlling the operation cycles; said means comprising; timing circuit means including serially connected resistances each having substantially the same value and a fixed capacitance for programming predetermined total time cycles of operation by electrically interconnecting a predetermined number of said resistances to said capacitance to collectively add to the required total resistance values to achieve the desired operation time; selector switch means operatively associated with said timing circuit means to select each desired operation cycle; and solid state means coupled to said timing circuit means for releasing said selector means upon completion of a desired programmed cycle.
Claim 3
Dependent Claim
23 words
The combination according to claim 1 wherein said serially connected resistances have a plurality of taps disposed between each resistance and said capacitance.
Claim 4
Dependent Claim
33 words
The combination according to claim 2 and jumper cables for electrically connecting said selector switch means to a desired tap to provide the total resistance values to achieve the total desired operation time.
Claim 5
Dependent Claim
16 words
The combination according to claim 2 wherein each of said resistances has a substantially similar value.
Claim 6
Dependent Claim
154 words
Microwave heating apparatus comprising: an oven enclosure; an electromagnetic energy generator; means for radiating said energy within said enclosure to heat articles disposed therein; electrical circuit means for operating said energy generator including a line voltage source and a high voltage power supply; means for automatically controlling the application of line voltages to said power supply; said control means comprising; electrical timing circuit means including serially connected resistances each having a substantially similar value and a fixed capacitance for programming predetermined total time cycles of operation by electrically interconnecting a predetermined number of said resistances to said capacitance to collectively add to the total time required for the article to be heated; selector switch means having a plurality of push buttons each identified with varied articles operatively associated with said timing means; and solid state means coupled to said timing circuit means for releasing said push buttons upon completion of a desired programmed cycle.
Claim 7
Dependent Claim
154 words
Microwave heating apparatus comprising: an oven enclosure; an electromagnetic energy generator; means for radiating said energy within said enclosure to heat articles disposed therein; electrical circuit means for operating said energy generator including a line voltage source and a high voltage power supply; means for automatically controlling the application of line voltages to said power supply; said control means comprising; electrical timing circuit means including serially connected resistances each having a substantially similar value and a fixed capacitance for programming predetermined total time cycles of operation by electrically interconnecting a predetermined number of said resistances to said capacitance to collectively add to the total time required for the article to be heated; selector switch means having a plurality of push buttons each identified with varied articles operatively associated with said timing means; and solid state means coupled to said timing circuit means for releasing said push buttons upon completion of a desired programmed cycle.
Claim 8
Dependent Claim
51 words
The heating apparatus according to claim 5 wherein said serially connected resistances have a plurality of taps disposed between each resistance and said capacitance and jumper cables electrically connect each selector switch push button to a desired tap to provide the total resistance values to achieve the total desired operation time.
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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |