US3562490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-cleaning control system for oven
Assignee: Westinghouse Electric Corp
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Filing: 1968-04-25
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Granted: 1971-02-09
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Expires: 1988-04-25
Abstract
Abstract The titled apparatus in which the oven is maintained in a heatcleaning temperature range for a period corresponding to a selected number of cycles of the oven clean-temperature thermostat.
Inventors
- 👤 James A Leach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:01
CPC Classifications
F; F24; F24C; F24C14/00; F24C14/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
137 words
In a heat cleaning oven having a door and latching means therefor, a control system comprising: means for heating said oven into a heat cleaning temperature range; first switch means, including front and back contacts, responsive to the temperatures produced in said oven to open and close said front contacts to cycle said heating means to maintain oven temperatures within a temperature range selected to effect heat cleaning, said back contacts being closed and opened alternately with said front contacts; solenoid means energized and deenergized by closing and opening, respectively, said back contacts; counting means movable in successive steps in accordance with energization of said solenoid; and second switch means operated to an open position by said counting means after a selected number of said cycles of said heating means to terminate heating by said heating means.
Claim 2
Dependent Claim
137 words
In a heat cleaning oven having a door and latching means therefor, a control system comprising: means for heating said oven into a heat cleaning temperature range; first switch means, including front and back contacts, responsive to the temperatures produced in said oven to open and close said front contacts to cycle said heating means to maintain oven temperatures within a temperature range selected to effect heat cleaning, said back contacts being closed and opened alternately with said front contacts; solenoid means energized and deenergized by closing and opening, respectively, said back contacts; counting means movable in successive steps in accordance with energization of said solenoid; and second switch means operated to an open position by said counting means after a selected number of said cycles of said heating means to terminate heating by said heating means.
Claim 3
Dependent Claim
33 words
In a system according to claim 1 including: means mounting said counting means for movement into and out of position for operation by said solenoid in accordance with operation of said latching means.
Claim 4
Dependent Claim
30 words
In a system according to claim 2 including: means biasing said counting means to an initial position when said counting means is out of position for operation by said solenoid.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |