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:
Sep. 07, 1982
Filed:
Jan. 23, 1981
Applicant:
Inventor:
John T Benson, Canoga Park, CA (US);
Assignee:
Mattel, Inc., Hawthorne, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369155 ; 369 63 ;
Abstract
The piston portion of a coupling for a mechanical phonograph is split lengthwise and joined together at a closed end by a living hinge so that the compression spring which biases the piston against the tonearm will exert a spreading force to the piston conforming it to the inside diameter of the cylinder or collar on the speaker cone, thereby achieving the close clearance required to transmit recorded sound vibrations to the speaker cone.