US4291356A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for analyzing a physical quantity
Assignee: LES INDUSTRIES C-MAC Inc
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Filing: 1979-08-02
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Granted: 1981-09-22
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Expires: 1999-08-02
Abstract
Abstract The disclosure herein describes an apparatus for analyzing a physical quantity, such as current, and for providing an indication of this quantity to an actuating element, for example a relay; a value of the physical quantity is compared to two preadjusted reference points and, as a result of this comparison, the actuating element is either energized, de-energized or remains unchanged; the two reference points are entirely independent from one another and either one can be made greater than the other; a particular application for this invention is for actuating a current relay.
Inventors
- 👤 Serge Mathieu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:34
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/08; H02H3/02; H02H3/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
188 words
An apparatus for analyzing a physical quantity and for providing an indication of said quantity to an actuating element, comprising: (a) means providing an input signal representative of said physical quantity; (b) double adjustment means defining a pair of predetermined reference points, a first of said reference points determining a first value of said physical quantity for which said actuating element is to be energized, a second of said reference points determining a second value of said physical quantity for which said actuating element is to be de-energized; (c) means comparing said input signal to said first and second values; (d) a pair of EXCLUSIVE OR gates connected to said comparing means, one of said gates producing a given signal when said element is to be energized and the other of said gates producing a given signal when said element is to be de-energized; (e) means responsive to said signals from said gates and said comparing means to provide an indication to said actuating element, said indication consisting of: energizing said actuating element, de-energizing said actuating element, or effecting no change to the state of said actuating element.
Claim 2
Independent Claim
188 words
An apparatus for analyzing a physical quantity and for providing an indication of said quantity to an actuating element, comprising: (a) means providing an input signal representative of said physical quantity; (b) double adjustment means defining a pair of predetermined reference points, a first of said reference points determining a first value of said physical quantity for which said actuating element is to be energized, a second of said reference points determining a second value of said physical quantity for which said actuating element is to be de-energized; (c) means comparing said input signal to said first and second values; (d) a pair of EXCLUSIVE OR gates connected to said comparing means, one of said gates producing a given signal when said element is to be energized and the other of said gates producing a given signal when said element is to be de-energized; (e) means responsive to said signals from said gates and said comparing means to provide an indication to said actuating element, said indication consisting of: energizing said actuating element, de-energizing said actuating element, or effecting no change to the state of said actuating element.
Claim 3
Independent Claim
167 words
An apparatus for analyzing a physical quantity and for providing an indication of said quantity to a relay, comprising: (a) transducer means providing an input signal representative of said physical quantity; (b) potentiometer means defining two predetermined reference points, a first of said reference points determining a first value of said physical quantity for which said relay is to be energized, the second of said reference points determining a second value of said physical quantity for which said relay is to be de-energized; (c) a pair of comparator means each comparing said input signal with a respective one of said first and second values; (d) compensation means at the output of said two comparator means; (e) third comparator means comparing said reference points and indicating whether compensation is required; (f) bistable means responsive to said compensation means and said comparator means to provide an indication to said relay, said indication including: energizing said relay, de-energizing said relay, or effecting no change to the state of said relay.
Claim 4
Independent Claim
167 words
An apparatus for analyzing a physical quantity and for providing an indication of said quantity to a relay, comprising: (a) transducer means providing an input signal representative of said physical quantity; (b) potentiometer means defining two predetermined reference points, a first of said reference points determining a first value of said physical quantity for which said relay is to be energized, the second of said reference points determining a second value of said physical quantity for which said relay is to be de-energized; (c) a pair of comparator means each comparing said input signal with a respective one of said first and second values; (d) compensation means at the output of said two comparator means; (e) third comparator means comparing said reference points and indicating whether compensation is required; (f) bistable means responsive to said compensation means and said comparator means to provide an indication to said relay, said indication including: energizing said relay, de-energizing said relay, or effecting no change to the state of said relay.
Claim 5
Dependent Claim
19 words
An apparatus as defined in claim 2, wherein said compensation means consist of a pair of EXCLUSIVE OR gates.
Claim 6
Dependent Claim
16 words
An apparatus as defined in claim 1 or claim 2, wherein said physical quantity is current.
Claim 7
Dependent Claim
56 words
An apparatus as in claim 2, wherein said compensation means includes: a pair of EXCLUSIVE OR gates connected to said pair of comparator means, one of said gates producing a given signal when said relay is to be energized and the other of said gates producing a given signal when said element is to be de-energized.
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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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |