US3254423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dryer control circuit
Assignee: Hamilton Manufacturing Co
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Filing: 1961-12-04
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Granted: 1966-06-07
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Expires: 1981-12-04
Abstract
No abstract record available.
Inventors
- 👤 Charles E Ruelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:04
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/1919
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A CONTROL SYSTEM FOR A LAUNDRY DRYER HAVING A DRYING CHAMBER, COMPRISING MAIN HEATING MEANS FOR THE DRYING CHAMBER, A MAIN HEATING ELECTRICAL CIRCUIT FOR CONTROLLING SAID MAIN HEATING MEANS, FIRST ELECTRICAL SWITCH MEANS RESPONSIVE TO THE TEMPERATURE WITHIN THE DRYING CHAMBER AND OPERATIVE TO DEENERGIZE SAID MAIN HEATING CIRCUIT WHEN THE TEMPERATURE WITHIN THE DRYING CHAMBER RISES TO A PREDETERMINED UPPER LIMIT AND TO ENERGIZE SAID MAIN HEATING CIRCUIT WHEN THE TEMPERATURE WITHIN THE DRYING CHAMBER FALLS TO A PREDETERMINED LOWER LIMIT, SECOND TEMPERATURE SENSITIVE ELECTRICAL SWITCH MEANS OPERATIVE TO OPEN SAID MAIN HEATING CIRCUIT WHEN IT IS HEATED ABOVE A PREDETERMINED TEMPERATURE, AND A SECONDARY HEATING MEANS POSITIONED TO HEAT SAID SECOND SWITCH MEANS AND CONNECTED TO BE RESPONSIVE TO THE POSITION OF SAID FIRST ELECTRICAL SWITCH MEANS IN SUCH A MANNER THAT CURRENT FLOWS THROUGH SAID SECONDARY HEATING MEANS ONLY WHEN SAID MAIN HEATING CIRCUIT IS DEENERGIZED BY SAID FIRST SWITCH MEANS, SAID SECOND SWITCH MEANS THEREBY ABSORBING AND ACCUMULATING HEAT WHEN SAID MAIN HEATING CIRCUIT IS DEENERGIZED AND DISSIPATING HEAT WHEN SAID MAIN HEATING CIRCUIT IS ENERGIZED.
Claim 2
Dependent Claim
181 words
A CONTROL SYSTEM FOR A LAUNDRY DRYER HAVING A DRYING CHAMBER, COMPRISING MAIN HEATING MEANS FOR THE DRYING CHAMBER, A MAIN HEATING ELECTRICAL CIRCUIT FOR CONTROLLING SAID MAIN HEATING MEANS, FIRST ELECTRICAL SWITCH MEANS RESPONSIVE TO THE TEMPERATURE WITHIN THE DRYING CHAMBER AND OPERATIVE TO DEENERGIZE SAID MAIN HEATING CIRCUIT WHEN THE TEMPERATURE WITHIN THE DRYING CHAMBER RISES TO A PREDETERMINED UPPER LIMIT AND TO ENERGIZE SAID MAIN HEATING CIRCUIT WHEN THE TEMPERATURE WITHIN THE DRYING CHAMBER FALLS TO A PREDETERMINED LOWER LIMIT, SECOND TEMPERATURE SENSITIVE ELECTRICAL SWITCH MEANS OPERATIVE TO OPEN SAID MAIN HEATING CIRCUIT WHEN IT IS HEATED ABOVE A PREDETERMINED TEMPERATURE, AND A SECONDARY HEATING MEANS POSITIONED TO HEAT SAID SECOND SWITCH MEANS AND CONNECTED TO BE RESPONSIVE TO THE POSITION OF SAID FIRST ELECTRICAL SWITCH MEANS IN SUCH A MANNER THAT CURRENT FLOWS THROUGH SAID SECONDARY HEATING MEANS ONLY WHEN SAID MAIN HEATING CIRCUIT IS DEENERGIZED BY SAID FIRST SWITCH MEANS, SAID SECOND SWITCH MEANS THEREBY ABSORBING AND ACCUMULATING HEAT WHEN SAID MAIN HEATING CIRCUIT IS DEENERGIZED AND DISSIPATING HEAT WHEN SAID MAIN HEATING CIRCUIT IS ENERGIZED.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |