H - Electricity – 01 – H
Patent
H - Electricity
01
H
348/42
H01H 47/02 (2006.01) H01H 47/00 (2006.01)
Patent
CA 2022282
In order to automatically restore the normal switching position of a relay armature after an accidental external impact has switched it to the off position, the output of the relay is monitored and is applied to a differentiating circuit. A compar- tor is provided to reflect on and off operations of a main switch. In the event that the output of the relay drops suddently, the differentiating circuit outputs a pulse to a wave- shaping circuit (e.g., a Schmitt trigger). A gate circuit is supplied with the outputs of the wave-shaping circuit and the comparator. The out- put of the gate circuit momentarily allows a relay driver to actuate the relay in response to the undesired change in relay status, and hence the relay armature resumes the on position.
Corporation Nec
G. Ronald Bell & Associates
LandOfFree
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