Patent US3689802A successfully refreshed from Google Patents.
US3689802A
Expired / Lapsed
US
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Apparatus for supervising the functioning of an analog plural-channel regulating system
Assignee: Individual
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Filing: 1971-04-21
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Granted: 1972-09-05
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Expires: 1991-04-21
Abstract
Abstract The mean value of the amplitude of analog signals appearing on individual control paths is continuously formed. Three-level switch means are provided which are addressed by groups of two control path voltages of the individual control paths, and a disturbed control path is disconnected by the switch means, and either the output signal of the mean-value forming unit or one of the remaining connected input signals is weighted, so that failure of one control path does not significantly affect the output signal of the mean-value forming unit which is supplied to following apparatus. Thus, the failure of a control path can occur without interruption or significantly changing the operation of this supervisory apparatus. This failure can sound an alarm which pinpoints the specific location of the fault.
Inventors
- 👤 Hermann Waldmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:57
CPC Classifications
G; G05; G05B; G05B9/00; G05B9/02; G05B9/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
128 words
Apparatus for supervising the operation of a plurality of control paths of an analog plural-channel regulation system and sensing a failure in one of said paths, comprising comparison means for continuously comparing the signal amplitudes on pairs of said plurality of control paths, mean-value forming means for receiving said signal amplitudes as inputs and forming an output which is the mean of the inputs applied thereto, said output being at an output level without a failure on any of said paths, and switch means responsive to a predetermined difference between said compared pairs for disconnecting one of said control paths from said mean-value forming means and maintaining the output of said mean-value forming means at approximately the output level when a failure occurs in one of said paths.
Claim 2
Dependent Claim
128 words
Apparatus for supervising the operation of a plurality of control paths of an analog plural-channel regulation system and sensing a failure in one of said paths, comprising comparison means for continuously comparing the signal amplitudes on pairs of said plurality of control paths, mean-value forming means for receiving said signal amplitudes as inputs and forming an output which is the mean of the inputs applied thereto, said output being at an output level without a failure on any of said paths, and switch means responsive to a predetermined difference between said compared pairs for disconnecting one of said control paths from said mean-value forming means and maintaining the output of said mean-value forming means at approximately the output level when a failure occurs in one of said paths.
Claim 3
Dependent Claim
37 words
Apparatus as set forth in claim 1, wherein upon the occurrence of a failure in one of said paths, said switch means changes the weighting of one of the inputs still connected to said mean-valve forming means.
Claim 4
Dependent Claim
33 words
Apparatus as set forth in claim 1, wherein upon the occurrence of a failure in one of said paths, said switch means changes the weighting of the output of said mean-value forming means.
Claim 5
Dependent Claim
23 words
Apparatus as set forth in claim 1, wherein said number of paths is three and said apparatus operates in a two-out-of-three selection mode.
Claim 6
Dependent Claim
42 words
Apparatus as set forth in claim 3, wherein said mean-value forming means comprises an operational amplifier and a feedback resistor, said switching means changing the resistance of said feedback resistor responsive to the occurrence of a fault in one of said paths.
Claim 7
Dependent Claim
46 words
Apparatus as set forth in claim 1, comprising a plurality of warning means with respective ones of said warning means associated with respective ones of said plurality of paths, said one of said warning means being energized when a failure occurs in an associated control path.
Claim 8
Dependent Claim
25 words
Apparatus as set forth in claim 6, comprising a central warning means being energized when a failure occurs on any of said plurality of paths.
Claim 9
Dependent Claim
64 words
Apparatus as set forth in claim 1, wherein said comparison means comprises a first operational amplifier having two inputs connected with respective ones of said pairs of control paths and a variable feedback resistance for varying the gain of said operational amplifier, Zener diode means and a second operational amplifier, said Zener diode means connected in series between said first and second operational amplifiers.
Claim 10
Dependent Claim
56 words
Apparatus as set forth in claim 1, comprising integrating members within said control paths, the inputs of said mean-value forming means being coupled through a negative feedback coupling to the input of an integrating member, the output of said mean-value forming unit being coupled through a positive feedback coupling to the input of said integrating member.
References Cited (Backward Citations)
DE1280431B
Cited
US3544778A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |