US3118044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for cooking apparatus
Assignee: Westinghouse Electric Corp
•
Filing: 1960-11-10
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Granted: 1964-01-14
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Expires: 1980-11-10
Abstract
No abstract record available.
Inventors
- 👤 Calvin J Holtkamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:11
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0213
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
CONTROL APPARATUS FOR A SURFACE HEATER ADAPTED TO SUPPORT A VESSEL AND COMPRISING: CIRCUITRY FOR CONNECTING THE SURFACE HEATER TO A SOURCE OF ELECTRICAL ENERGY, A VARIABLE WATTAGE SWITCH IN SAID CIRCUITRY HAVING A PLURALITY OF RANGES OF WATTAGE INPUT WITH EACH RANGE CONTAINING A PLURALITY OF SWITCH POSITIONS PROVIDING PROGRESSIVELY HIGHER WATTAGE INPUTS, A TEMPERATURE LIMITER ASSOCIATED WITH THE HEATER AND PROVIDING A SINGLE DIFFERENT PREDETERMINED TEMPERATURE LIMIT FOR EACH RANGE OF WATTAGE INPUT OF SAID VARIABLE WATTAGE SWITCH, SAID TEMPERATURE LIMITER COMPRISING A PLURALITY OF SWITCHES, ONE FOR EACH TEMPERATURE LIMIT, TOGETHER WITH A SINGLE TEMPERATURE-RESPONSIVE MEMBER FOR CONTROLLING SAID PLURALITY OF SWITCHES, AND MANUALLY OPERABLE SELECTOR MECHANISM FOR ADJUSTING THE VARIABLE WATTAGE SWITCH TO THE DESIRED WATTAGE INPUT POSITION FOR THE RANGE BEING UTILIZED AND FOR SIMULTANEOUSLY CONTROLLING THE TEMPERATURE LIMITER TO RENDER EFFECTIVE THE PREDETERMINED TEMPERATURE LIMIT FOR THAT RANGE.
Claim 2
Dependent Claim
144 words
CONTROL APPARATUS FOR A SURFACE HEATER ADAPTED TO SUPPORT A VESSEL AND COMPRISING: CIRCUITRY FOR CONNECTING THE SURFACE HEATER TO A SOURCE OF ELECTRICAL ENERGY, A VARIABLE WATTAGE SWITCH IN SAID CIRCUITRY HAVING A PLURALITY OF RANGES OF WATTAGE INPUT WITH EACH RANGE CONTAINING A PLURALITY OF SWITCH POSITIONS PROVIDING PROGRESSIVELY HIGHER WATTAGE INPUTS, A TEMPERATURE LIMITER ASSOCIATED WITH THE HEATER AND PROVIDING A SINGLE DIFFERENT PREDETERMINED TEMPERATURE LIMIT FOR EACH RANGE OF WATTAGE INPUT OF SAID VARIABLE WATTAGE SWITCH, SAID TEMPERATURE LIMITER COMPRISING A PLURALITY OF SWITCHES, ONE FOR EACH TEMPERATURE LIMIT, TOGETHER WITH A SINGLE TEMPERATURE-RESPONSIVE MEMBER FOR CONTROLLING SAID PLURALITY OF SWITCHES, AND MANUALLY OPERABLE SELECTOR MECHANISM FOR ADJUSTING THE VARIABLE WATTAGE SWITCH TO THE DESIRED WATTAGE INPUT POSITION FOR THE RANGE BEING UTILIZED AND FOR SIMULTANEOUSLY CONTROLLING THE TEMPERATURE LIMITER TO RENDER EFFECTIVE THE PREDETERMINED TEMPERATURE LIMIT FOR THAT RANGE.
References Cited (Backward Citations)
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US2790056A
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US2815428A
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US2919337A
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US2816203A
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US2883506A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-13 | 1967-07-15 | 1968-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-13 | 1971-07-15 | 1972-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-13 | 1975-07-15 | 1976-01-14 | $7700.00 | Window Closed / Lapsed |