Apparatus for analyzing a physical quantity
AssigneeH.O.P. Consulab Inc.
InventorSerge Mathieu
Life of this patent
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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.
Claims5
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.
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.
Dependencies are inferred from the claim text.