Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1981-09-14
1983-08-30
Eisenzopf, Reinhard J.
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
361210, 324117R, 324253, 340 38L, H01H 5122
Patent
active
044020341
ABSTRACT:
A polarity sensitive relay fabricated of and controlled by, solid state components is provided to produce a more trouble-free and smaller device. The relay may be made in first and second versions, the first of which responds to input signals of a single polarity and the second of which produces first and second output signals in response to input signals of first and second polarities, respectively. The relays include first or second Wiegand modules each of which has a drive coil, an input signal coil and an output signal winding. The Wiegand modules are placed in a steady state magnetic bias and the drive coils pulsed at a predetermined frequency. When two modules are used, the input signal coils are connected in series and in a manner to produce opposite magnetic effects on their associated Wiegand modules. One or the other of the output signal windings will produce a stream of pulses, at the frequency at which the drive coils are driven, in response to a signal of one or the other polarity in the input signal windings. An appropriate magnetic shield is provided to prevent magnetic interference to or from nearby components. A disclosed embodiment is designed to be fail safe meaning that a component failure will not result in an output signal. The relays will not respond to an input signal below a predetermined magnitude.
REFERENCES:
patent: 2835734 (1958-05-01), Fisher
patent: 3024411 (1962-03-01), Hours
patent: 3040248 (1962-06-01), Geyger
patent: 3892118 (1975-07-01), Wiegand
patent: 3959763 (1976-05-01), Sibley et al.
patent: 4050013 (1977-09-01), Maddox
patent: 4236093 (1980-11-01), Birnbaum
patent: 4309628 (1982-01-01), Wiegand
Auer, Jr. John H.
Parker John W.
E. I. Du Pont de Nemours and Company
Eisenzopf Reinhard J.
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