US3571660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulating circuit
Assignee: Honeywell Inc
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Filing: 1968-12-06
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Granted: 1971-03-23
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Expires: 1988-12-06
Abstract
Abstract A circuit for providing protection against power line high voltage surges is described. A sensor such as a Zener diode is used to detect the high voltage surge and triggers one of two silicon controlled rectifiers. The silicon controlled rectifiers are connected from the output of the protection circuit to the opposite sides of the power line to connect the output of the circuit to the negative side of the power line input during the high voltage surge.
Inventors
- 👤 Harold J Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:01
CPC Classifications
H; H02; H02H; H02H9/00; H02H9/04; H02H9/041
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
Circuit protection apparatus comprising: first and second power terminals for supplying a voltage therebetween; output means for supplying an output voltage; means connecting said first and second power terminals to said output means; sensing means connected to said means connecting said first and second power terminals to said output means for sensing overvoltage conditions and for providing an output signal in response to an overvoltage condition; first switching means connected between sAid output means and said first power terminal for completing a circuit between said output means and said first power terminal when the voltage between said first and second power terminals is of a first sense; second switching means connected between said output means and said second power terminal for completing a circuit between said output means and said second power terminal when the voltage between said first and second power terminals is of a second sense; and means connecting said sensing means to said first and second switching means for switching said first or second switching means to a conducting condition when an overvoltage occurs.
Claim 2
Dependent Claim
177 words
Circuit protection apparatus comprising: first and second power terminals for supplying a voltage therebetween; output means for supplying an output voltage; means connecting said first and second power terminals to said output means; sensing means connected to said means connecting said first and second power terminals to said output means for sensing overvoltage conditions and for providing an output signal in response to an overvoltage condition; first switching means connected between sAid output means and said first power terminal for completing a circuit between said output means and said first power terminal when the voltage between said first and second power terminals is of a first sense; second switching means connected between said output means and said second power terminal for completing a circuit between said output means and said second power terminal when the voltage between said first and second power terminals is of a second sense; and means connecting said sensing means to said first and second switching means for switching said first or second switching means to a conducting condition when an overvoltage occurs.
Claim 3
Dependent Claim
38 words
Circuit protection apparatus as defined in claim 1 wherein said means connecting said first and second power terminals to said output means includes a rectifying means for rectifying alternating voltage provided at said first and second power terminals.
Claim 4
Dependent Claim
63 words
Circuit protection apparatus as defined in claim 1 wherein said means connecting said first and second power terminals to said output means includes first resistive means connected between said sensing means and said first and second switching means and wherein second and third resistive means are connected between said first and second switching means, respectively, and said first and second power terminals, respectively.
Claim 5
Dependent Claim
81 words
Circuit protection apparatus as defined in claim 1 wherein said means connecting said first and second power terminals to said output means includes a rectifying means for rectifying alternating voltage provided at said first and second power terminals and further includes first resistive means connected between said sensing means and said first and second switching means and wherein second and third resistive means are connected between said first and second switching means, respectively, and said first and second power terminals, respectively.
Claim 6
Dependent Claim
35 words
Circuit protection apparatus as defined in claim 4 wherein said sensing means includes a Zener diode and said first and second switching means are controlled rectifiers having their control electrodes connected to said sensing means.
Claim 7
Dependent Claim
143 words
Apparatus for providing protection against excessive voltages comprising, in combination: input means for accepting an alternating input voltage; rectifying means connected to said input means for rectifying said alternating input voltage; sensing means connected to an output of said rectifying means for sensing when excessive voltages occur; output means for providing a generally direct output voltage; first resistive means connected between said rectifying means and said output means; first controlled rectifier means connected in series with a second resistive means between said output means and said input means; second controlled rectifier means connected in series with a third resistive means between said output means and said input means; and means connecting said sensing means to control electrodes of said first and second controlled rectifier means for alternatively switching said first or second controlled rectifier means to a conducting condition when an overvoltage occurs.
Claim 8
Dependent Claim
143 words
Apparatus for providing protection against excessive voltages comprising, in combination: input means for accepting an alternating input voltage; rectifying means connected to said input means for rectifying said alternating input voltage; sensing means connected to an output of said rectifying means for sensing when excessive voltages occur; output means for providing a generally direct output voltage; first resistive means connected between said rectifying means and said output means; first controlled rectifier means connected in series with a second resistive means between said output means and said input means; second controlled rectifier means connected in series with a third resistive means between said output means and said input means; and means connecting said sensing means to control electrodes of said first and second controlled rectifier means for alternatively switching said first or second controlled rectifier means to a conducting condition when an overvoltage occurs.
Claim 9
Dependent Claim
16 words
Apparatus as defined in claim 6 wherein said rectifying means is a full wave rectifying means.
Claim 10
Dependent Claim
14 words
Apparatus as defined in claim 7 wherein said sensing means includes a Zener diode.
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) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |