Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1980-01-28
1983-09-27
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310338, 310346, 310367, 310329, 73702, 73729, H01L 4108
Patent
active
044069669
ABSTRACT:
A mounting structure for crystal resonators used as frequency standards and transducers which maximizes performance and reduces the sensitivity to environmental errors. In one embodiment, force sensitive crystal resonators having inherent unmounted temperature sensitivities are used in conjunction with reactive spring-like mounting arrangements having predetermined temperature stress characteristics such that the thermally induced mechanical stress of the mounting arrangements changes, compensates, and optimizes the overall combined temperature characteristics. In another embodiment crystal resonators are isolated from the external environment so that they are capable of sensing forces while operating in a vacuum or inert atmosphere. Environmental isolation is provided by bellows and/or diaphragm arrangements used alone or in conjunction with air-tight enclosures which enable forces to be applied to stress-sensitive crystals while isolating the crystals from the external force producing environment.
REFERENCES:
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patent: 3247711 (1966-04-01), Howatt
patent: 3437849 (1969-04-01), Treatch
patent: 3470400 (1969-09-01), Weisbord
patent: 3505880 (1970-04-01), Riordan
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patent: 4020448 (1977-04-01), Corbett
patent: 4067241 (1978-01-01), Corbett
patent: 4190782 (1980-02-01), Guess
patent: 4215570 (1980-08-01), Nisse
Budd Mark O.
Paroscientific, Inc.
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