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:
Apr. 04, 1978
Filed:
Nov. 04, 1976
Donald K Fletchic, Arlington Heights, IL (US);
Howard J Morrison, Deerfield, IL (US);
Ralph H Baer, Manchester, NH (US);
Marvin Glass & Associates, Chicago, IL (US);
Abstract
A tone arm lift mechanism for a programmable phonograph device includes a selectively actuatable solenoid mounted on the free end of the tone arm. The coil of the solenoid includes a movable armature and is mounted on the tone arm in a position so that the armature moves in a generally vertical direction, perpendicular to the surface of a record on the phonograph device. A resilient pad is provided on the lower end of the solenoid armature for engagement with the top surface of the record. A selectively actuatable control energizes the solenoid coil and moves the armature downwardly with respect to the coil, so that, as the resilient pad engages the record surface, the tone arm is moved upwardly so that the stylus moves out of engagement with the record grooves for transverse movement of the tone arm and stylus with respect to the record. In one embodiment, the armature includes a portion of permanently magnetized material which provides a controlled, linear response of the armature after enegization of the coil. A further embodiment provides a biasing leaf spring secured to the tone arm at one end and extending beneath the end of the solenoid armature. A resilient pad is mounted to the opposite side of the leaf spring so that the armature flexes the leaf spring downwardly moving the resilient pad into engagement with the record surface and lifting the tone arm off of the record.