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:
Oct. 31, 1978
Filed:
Mar. 14, 1977
Applicant:
Inventor:
Donald I Gonser, Forest Park, OH (US);
Assignee:
Dentsply Research and Development Corporation, Milford, DE (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
307326 ; 12830313 ; 12830314 ;
Abstract
A control circuit for an electrical device which includes a switch that is electrically isolated from other components. The switch is connected in series with a photovoltaic cell and relay means. The photovoltaic cell is illuminated so that closing of contacts of the switch causes actuation of the relay means. The relay means is connected to actuate the electrical device. Voltage at the switch is limited by the voltage produced by the photovoltaic cell.