H - Electricity – 01 – H
Patent
H - Electricity
01
H
306/10
H01H 57/00 (2006.01)
Patent
CA 1233494
ALTERNATING CURRENT DRIVEN LATCHING RELAY AND METHOD OF OPERATION ABSTRACT OF THE DISCLOSURE An alternating current latching relay is provided which employs a latching-type, mechanically operated snap-action switch mechanism with a set of electric contacts that are selectively latched either in the open or closed condition in a snap-action manner upon successive actuations of the snap-action mechanism by suitable push rod means for initiating its operation. At least one alternating current excited bender-type piezoelectric drive member has one end secured to a common base member with the latching-type snap-action switch mechanism and the remaining free end engaging the push rod means. An alternating current electric excitation signal is directly applied to the piezoelectric plate elemnts of the bender-type drive member for mechanically vibrating the bender-type drive member in a manner such that its amplitude of vibration quickly builds up to a value where it repeatedly strikes the push rod means with sufficient force to selectively actuate the snap-action switch mechanism to the opposite one of its two operating conditions from that in which it originally was sat. A tuning mass in the form of a slug element is secured to the end of the bender-type drive member to reduce the natural resonant frequency of vibration of the bender-type drive member to reduce the natural resonant frequency of vibration of the bender-type drive member to substantially the frequency of the alternating current excitation signal to thereby increase the amplitude of its vibrations to a maximu. Additionally, the tuning mass increases the impulse delivered by the bender type drive member to the push rod for actuating the snap-action mechanism.
483478
Davenport John M.
Germano Carmen P.
Company General Electric
Eckersley Raymond A.
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