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:
Aug. 09, 1988
Filed:
Mar. 27, 1986
Bruce T Williams, Lockport, NY (US);
Other;
Abstract
A sensor for an electrostatic voltmeter comprising an elongated vibratory element supported at one end in the manner of a cantilever beam, a sensitive electrode on the vibratory element near the other end and adapted to be disposed toward an electrical field or potential being measured, a driver chip on the vibratory element for vibrating the element in a direction to vary the capacitive coupling between the electrode and the electrical field or potential being measured, and an amplifier on the vibratory element in direct proximity to the sensitive electrode and having an input connected to the electrode and an output adapted for connection to the electrostatic voltmeter. The amplifier is mounted directly on the vibratory element so as to be in synchronous motion with the electrode. Preferably the electrode is mounted on one side of the vibratory element and the amplifier is mounted on the opposite side. The sensor includes a housing having an operative surface provided with an opening therein, and the vibratory element extends from the surface into the opening and is supported at one end from the surface in the manner of a cantilever beam.