Patent US3757202A successfully refreshed from Google Patents.
US3757202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line voltage regulator
Assignee: RTX Corp
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Filing: 1972-09-11
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Granted: 1973-09-04
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Expires: 1992-09-11
Abstract
Abstract This invention comprises a circuit and apparatus for sensing the input voltage to a device and for boosting the input voltage when it falls below a predetermined acceptable level so that the voltage supplied to a device is relatively constant. A sensing circuit acts to switch in the boost winding of an autotransformer when the input voltage is below the predetermined level. A second sensing circuit and apparatus is provided which senses a second input voltage level, lower than the first, and which disconnects the load device when the input voltage is below the second level.
Inventors
- 👤 L Bixler
- 👤 R Proutny
- 👤 M Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
137 words
A voltage regulating circuit and apparatus for regulating the voltage supplied to a load, comprising: a voltage sensitive switching means which switches on a positive going half cycle of an input voltage, wherein said voltage sensitive switching means comprises: a voltage breakdown device sensitive to a voltage level of a positive going half cycle of said input voltage; a first relay controlled by said breakdown device; a second switching means responsive to said voltage sensitive switching means for controlling the voltage supplied to a load and operating only on a negative going half cycle of the input voltage, wherein said second switching means comprises: a second relay controlled by said first relay, said second relay switching only on negative going half cycles of the input voltage, whereby said second relay controls the voltage supplied to a load.
Claim 2
Dependent Claim
137 words
A voltage regulating circuit and apparatus for regulating the voltage supplied to a load, comprising: a voltage sensitive switching means which switches on a positive going half cycle of an input voltage, wherein said voltage sensitive switching means comprises: a voltage breakdown device sensitive to a voltage level of a positive going half cycle of said input voltage; a first relay controlled by said breakdown device; a second switching means responsive to said voltage sensitive switching means for controlling the voltage supplied to a load and operating only on a negative going half cycle of the input voltage, wherein said second switching means comprises: a second relay controlled by said first relay, said second relay switching only on negative going half cycles of the input voltage, whereby said second relay controls the voltage supplied to a load.
Claim 3
Dependent Claim
20 words
The voltage regulating circuit and apparatus as claimed in claim 1 wherein said voltage breakdown device is a Zener diode.
Claim 4
Dependent Claim
44 words
The circuit and apparatus according to claim 1 wherein: said input voltage is connected to an autotransformer; said second relay connects the load to the boost winding of said autotransformer when said second relay is energized thereby increasing the voltage supplied to said load.
Claim 5
Dependent Claim
21 words
The circuit and apparatus according to claim 1 wherein: said second relay disconnects said load when said second relay is deenergized.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |