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. 11, 1994
Filed:
Oct. 28, 1992
Applicant:
Inventors:
Takeyuki Takagi, Nagoya, JP;
Yoshitsugu Sato, Kuwana, JP;
Makoto Watanabe, Nagoya, JP;
Isao Mochizuki, Gifu, JP;
Assignee:
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
200513 ; 200344 ;
Abstract
A keyswitch assembly is provided with a scissors-type lever positioned over a rubber spring having the shape resembling an asymmetrical inverted cup. The thickness of a portion of the side wall of the rubber spring on one side is greater than the thickness of a side wall on the opposed side of the rubber spring. Also, the top surface of the rubber spring is inclined so that the height of a portion of the outer surface of the upper wall of the rubber spring nearer to one side of the lever is smaller than that of the height of the spring nearer to the other side of the lever.