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:
Jan. 20, 1998
Filed:
Dec. 22, 1995
Gerard Vincent Weber, Jr, Saugerties, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
An accelerometer having a pair of spaced apart planar electrodes in a housing wherein one of the planar electrodes is made of a thin film and has a mass attached to one side such that acceleration causes the thin film to flex. A solid state amplifier is located in the housing attached to one of the planar electrodes to measure the change in capacitance caused by the flexing of the thin film. The solid state amplifier may be an NPN transistor. The mass may be a 4.5 mm steel airgun shot, and the thin film may be 1 mil polyester aluminized metallic film. The output of the accelerometer is connected to one input of a operational amplifier, and the other input of the operational amplifier is connected to a transducer measuring ambient noise such that the ambient noise is removed from the signal from the accelerometer.