Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1984-06-11
1985-08-27
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
200 67DB, 200181, 310317, 310330, 310331, 310323, 310358, H01L 4108
Patent
active
045380872
ABSTRACT:
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 elements 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 set. 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 substantially the frequency of the alternating current excitation signal to thereby increase the amplitude of its vibrations to a maximum. Additionally, the tuning mass increases the impulse delivered by the bender-type drive member to the push rod for actuating the snap-action mechanism.
REFERENCES:
patent: 2166763 (1939-07-01), Mason
patent: 3109901 (1963-11-01), Strauss
patent: 3821747 (1974-06-01), Mason
patent: 4395651 (1983-07-01), Yamamoto
patent: 4403166 (1963-09-01), Tanaka et al.
Davenport John M.
Germano Carmen P.
Budd Mark O.
General Electric Company
Jacob Fred
McDevitt J. F.
Schlamp Philip L.
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