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:
Dec. 21, 1982
Filed:
Mar. 24, 1980
Applicant:
Inventor:
James Meier, Des Plaines, IL (US);
Assignee:
Norlin Industries, Inc., White Plains, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C / ;
U.S. Cl.
CPC ...
84440 ; 84433 ;
Abstract
A keyboard mechanism for musical instruments which includes a key return spring made from resilient wire bent to form a pair of flexure spring arms connected by a bight. The arms have elbow bends. The ends of the arms have wrist bends, and are trapped in apertures formed in the frame of the instrument. The bight is trapped in one of a plurality of notches on the outer surface of the key. The spring is located close to the fulcrum of the key, in order to reduce the moment arm and spring deflection, both of which contribute to undesirable force build-up.