US3361941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuit for an electrically heated blanket
Assignee: INDOHEEM NV
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Filing: 1965-04-20
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Granted: 1968-01-02
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Expires: 1985-04-20
Abstract
No abstract record available.
Inventors
- 👤 August E F Fickweiler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:43
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/2451; G05D23/2453; G05B; G05B5/00; G05B5/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
SWITCHING CIRCUIT FOR AN ELECTRICALLY HEATED BLANKET, WHICH IS CONTROLLED BY ONE OR MORE NEGATIVE TEMPERATURE COEFFICIENT RESISTORS WHICH ARE ARRANGED IN THE BLANKET, WHEREIN THE HEATING CIRCUIT IS CONNECTED TO THE SUPPLY VOLTAGE THROUGH THE NORMALLY OPEN CONTACT OF A RELAY, THE COIL OF WHICH, WHICH IS BRIDGED WITH A CAPCITOR, IS CONNECTED IN THE MAIN DISCHARGE CIRCUIT OF A GAS DISCHARGE VALVE WITH TWO CONTROL ELECTRODES, WHICH IS SUPPLIED WITH AN A.C. VOLTAGE, THE FIRST CONTROL ELECTRODE BEING CONNECTED THROUGH THE NEGATIVE TEMPERATURE COEFFICIENT RESISTOR(S) TO THE POSITIVE TERMINAL OF A D.C. VOLTAGE SOURCE AND BEING CONNECTED THROUGH A CONVENTIOANL RESISTOR TO THE NEGATIVE TERMINAL THEREOF, WHILST THE SECOND CONTROL ELECTRODE IS THROUGH CONVENTIONAL RESISTORS CONNECTED TO THE POSITIVE AND NEGATIVE TERMINALS RESPECTIVELY OF THAT D.C. VOLTAGE SOURCE, WHILST THE FIRST CONTROL ELECTRODE IS ALSO CONNECTED TO THE CATHODE OF THE GAS DISCHARGE VALVE THROUGH A CONVENTIONAL GRID LEAK, THE RESISTANCE OF WHICHH IS LARGE AS COMPARED WITH THE REMAINING RESISTORS.
Claim 2
Dependent Claim
163 words
SWITCHING CIRCUIT FOR AN ELECTRICALLY HEATED BLANKET, WHICH IS CONTROLLED BY ONE OR MORE NEGATIVE TEMPERATURE COEFFICIENT RESISTORS WHICH ARE ARRANGED IN THE BLANKET, WHEREIN THE HEATING CIRCUIT IS CONNECTED TO THE SUPPLY VOLTAGE THROUGH THE NORMALLY OPEN CONTACT OF A RELAY, THE COIL OF WHICH, WHICH IS BRIDGED WITH A CAPCITOR, IS CONNECTED IN THE MAIN DISCHARGE CIRCUIT OF A GAS DISCHARGE VALVE WITH TWO CONTROL ELECTRODES, WHICH IS SUPPLIED WITH AN A.C. VOLTAGE, THE FIRST CONTROL ELECTRODE BEING CONNECTED THROUGH THE NEGATIVE TEMPERATURE COEFFICIENT RESISTOR(S) TO THE POSITIVE TERMINAL OF A D.C. VOLTAGE SOURCE AND BEING CONNECTED THROUGH A CONVENTIOANL RESISTOR TO THE NEGATIVE TERMINAL THEREOF, WHILST THE SECOND CONTROL ELECTRODE IS THROUGH CONVENTIONAL RESISTORS CONNECTED TO THE POSITIVE AND NEGATIVE TERMINALS RESPECTIVELY OF THAT D.C. VOLTAGE SOURCE, WHILST THE FIRST CONTROL ELECTRODE IS ALSO CONNECTED TO THE CATHODE OF THE GAS DISCHARGE VALVE THROUGH A CONVENTIONAL GRID LEAK, THE RESISTANCE OF WHICHH IS LARGE AS COMPARED WITH THE REMAINING RESISTORS.
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) | 1971-01-01 | 1971-07-03 | 1972-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-01-01 | 1975-07-03 | 1976-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-01-01 | 1979-07-03 | 1980-01-02 | $7700.00 | Window Closed / Lapsed |