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. 05, 1992
Filed:
Sep. 14, 1990
Junji Tomita, Hamamatsu, JP;
Yamaha Corporation, Hamamatsu, JP;
Abstract
In construction of a tremolo unit for an electric guitar, a bridge is coupled to a swingable bridge base in an arrangement movable in the string direction and provided with a string hole formed there through, a presser piece is received in the string hole for movement in the string direction, and a lock bolt screwed into the bridge forces the presser piece to press a string to the wall of the string hole with a string bead being locked against the lower end of the string hole. A dual fixing mechanism based on string pressing and bead locking well alleviates damage on the string construction caused by pressure application. The bridge and the presser piece are both made of iron-type metal for improvement in tone color of musical tones generated by the electric guitar.