Tone arm lift mechanism

Details Tone arm lift mechanism Tone arm lift mechanism

1976-11-04

1978-04-04

Aegerter, Richard E.

Undertaking

274 15R, G11B 1706

Patent

active

040822923

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.

REFERENCES:
patent: 2031074 (1936-02-01), Scheibell
patent: 2192360 (1940-03-01), Mann
patent: 2952464 (1960-09-01), Stimler
patent: 3272514 (1966-09-01), Heyerdahl
patent: 3429580 (1969-02-01), Hammond
patent: 3563554 (1971-02-01), Hess

Affiliated with

Also associated with

Rating

Tone arm lift mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Tone arm lift mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tone arm lift mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-719655