Patent US3918407A successfully refreshed from Google Patents.
Patent US3229379A successfully refreshed from Google Patents.
US3229379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for fabric dryer
Assignee: General Electric Co
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Filing: 1963-03-18
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Granted: 1966-01-18
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Expires: 1983-03-18
Abstract
No abstract record available.
Inventors
- 👤 Donald S Heidtmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:32
CPC Classifications
D; D06; D06F; D06F34/00; D06F34/06; D06F2103/00; D06F2103/02; D06F2103/08; D06F2103/10; D06F2103/28; D06F2103/32; D06F2103/38; D06F2103/44; D06F2105/00; D06F2105/28; D06F34/14; D06F34/26; D06F58/00; D06F58/32; D06F58/34; D06F58/36; D06F58/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
IN A FABRIC DRYER INCLUDING A CHAMBER FOR RECEIVING FABRICS TO BE DRIED, HEATING MEANS ARRANGED TO HEAT FABRICS IN SAID CHAMBER AND ADAPTED TO BE CONNECTED ACROSS A SOURCE OF ALTERNATING CURRENT, AND A FORCED AIR SYSTEM WITH AN EXHAUST DUCT LEADING FROM THE CHAMBER; MEANS FOR CONTROLLING ENERGIZATION OF THE HEATING MEANS, INCLUDING: (A) A CONTROLLED RECTIFIER CONNECTED IN SERIES WITH THE HEATING MEANS TO CONTROL PASSAGE OF CURRENT THROUGH THE HEATING MEANS DURING CURRENT HALF CYCLES OF A FIRST POLARITY, SAID RECTIFIER BECOMING CONDUCTIVE WHEN A PREDETERMINED VOLTAGE IS APPLIED TO ITS GATE, AND (B) A RAPID RESPONSE CONTROLLING CIRCUIT CONTROLLING THE VOLTAGE AT SAID GATE AND INCLUDING MEANS RESPONSIVE TO DRYNESS OF FABRICS IN SAID CHAMBER, SAID DRYNESS RESPONSIVE MEANS CAUSING SAID CIRCUIT TO INCREASE THE TIME DURING EACH CURRENT HALF CYCLE OF THE FIRST POLARITY OF THE VOLTAGE APPLIED TO SAID GATE TO REACH SAID PREDETERMINED VOLTAGE AS THE FABRICS BECOME DRIER WHEREBY A CONTINUOUSLY DECREASING AMOUNT OF ELECTRICAL ENERGY IS PROVIDED TO THE HEATING MEANS.
Claim 2
Dependent Claim
171 words
IN A FABRIC DRYER INCLUDING A CHAMBER FOR RECEIVING FABRICS TO BE DRIED, HEATING MEANS ARRANGED TO HEAT FABRICS IN SAID CHAMBER AND ADAPTED TO BE CONNECTED ACROSS A SOURCE OF ALTERNATING CURRENT, AND A FORCED AIR SYSTEM WITH AN EXHAUST DUCT LEADING FROM THE CHAMBER; MEANS FOR CONTROLLING ENERGIZATION OF THE HEATING MEANS, INCLUDING: (A) A CONTROLLED RECTIFIER CONNECTED IN SERIES WITH THE HEATING MEANS TO CONTROL PASSAGE OF CURRENT THROUGH THE HEATING MEANS DURING CURRENT HALF CYCLES OF A FIRST POLARITY, SAID RECTIFIER BECOMING CONDUCTIVE WHEN A PREDETERMINED VOLTAGE IS APPLIED TO ITS GATE, AND (B) A RAPID RESPONSE CONTROLLING CIRCUIT CONTROLLING THE VOLTAGE AT SAID GATE AND INCLUDING MEANS RESPONSIVE TO DRYNESS OF FABRICS IN SAID CHAMBER, SAID DRYNESS RESPONSIVE MEANS CAUSING SAID CIRCUIT TO INCREASE THE TIME DURING EACH CURRENT HALF CYCLE OF THE FIRST POLARITY OF THE VOLTAGE APPLIED TO SAID GATE TO REACH SAID PREDETERMINED VOLTAGE AS THE FABRICS BECOME DRIER WHEREBY A CONTINUOUSLY DECREASING AMOUNT OF ELECTRICAL ENERGY IS PROVIDED TO THE HEATING MEANS.
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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) | 1969-01-17 | 1969-07-19 | 1970-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-17 | 1973-07-19 | 1974-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-17 | 1977-07-19 | 1978-01-18 | $7700.00 | Window Closed / Lapsed |