H - Electricity – 03 – B
Patent
H - Electricity
03
B
347/1
H03B 1/00 (2006.01) H03B 5/04 (2006.01) H03H 9/08 (2006.01)
Patent
CA 1148643
TITLE ISOLATING AND TEMPERATURE COMPENSATING SYSTEM FOR CRYSTAL RESONATORS ABSTRACT OF THE DISCLOSURE A mounting structure for crystal resonators used as frequency standards and transducers which maximizes perform- ance and reduces the sensitivity to environmental errors. In one embodiment, force sensitive crystal resonators having in- herent unmounted temperature sensitivities are used in conjunc- tion with reactive spring-like mounting arrangements having predetermined temperature stress characteristics such that the thermally induced mechanical stress of the mounting arrange- ments 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 conjunc- tion with air-tight enclosures which enable forces to be ap- plied to stress-sensitive crystals while isolating the crys- tals from the external force producing environment.
368281
Frayne & Company Robert
Weigh-Tronix Inc.
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