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:
May. 16, 1978
Filed:
Sep. 30, 1976
Applicant:
Inventors:
J Arthur Cencel, Newport Beach, CA (US);
Andrew Voge, Arcadia, CA (US);
Barry W Mullins, Glendora, CA (US);
Assignee:
Becton, Dickinson Electronics Company, Rutherford, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
H01G / ; H01G / ;
U.S. Cl.
CPC ...
361288 ; 361278 ; 428597 ;
Abstract
In a capacitive key for use in a keyboard, an operator depresses a plunger which alters the separation between the plates of a capacitor, thereby altering its capacitance. It is desirable to provide plunger overtravel which permits further depression of the plunger after the capacitor has been altered. In the present invention a portion of the movable capacitor plate is formed into a spring which elastically deforms after the capacitor has been altered, to permit overtravel of the plunger.