The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 18, 1978
Filed:
Mar. 12, 1976
Johan T Farstad, Sunbury, OH (US);
IRD Mechanalysis, Inc., Columbus, OH (US);
Abstract
A piezo electric transducer employs a stack of piezo electric crystals interposed between electrodes and maintained under compression to develop an electrical charge which instantaneously corresponds to the acceleration of the device. One or two electrical resistors in series with the piezo electric crystal stack output develops a charge which instantaneously corresponds to the velocity of the device. The velocity responsive charge is delivered to a charge converter which may be located remotely from the piezo electric transducer. The charge converter generates an electrical signal having a voltage which is proportional to the instantaneous velocity of the device. The assembly permits use of high-sensitivity piezo electric crystals.