US3762723A — Automatic record changer

Claim 1

Independent Claim 335 words

In a phonograph record changer of the type including a motor board supporting a rotatable turntable, a spindle adapted to support a stack of records to be played, the record stack being steadied by a stabilizer arm which is vertically movable and is mounted to a stabilizer arm stab shaft extending through the motor board, and a power switch having a switch operator for closing and opening the switch contacts to electrically energize and de-energize said phonograph record changer to control the rotation of said turntable, the improvement comprising: a cycling gear having major surfaces and adapted to rotate during a record changing cycle of operation; a shut-off stud secured for rotation with said cycling gear and projecting from a major surface of said gear; a cycling slide coupled to said cycling gear to be driven in a reciprocating movement toward and away from the central axis of said turntable during a record changing cycle of operation; a landing lever rotatably mounted beneath said motor board; said cycling slide positioned to engage said landing lever during its movement toward the central axis of said turntable such that said landing lever is rotated in a first direction; spring means coupled to said landing lever to bias said lever for rotation in a second direction; a shut-off lever coupled to said landing lever; said stab shaft positioned to block said landing lever from rotating in said second direction after a last record in said stack has been played and said cycling slide has disengaged from said landing lever during its movement away from the central axis of said turntable; said shut-off lever positioned to interfere with said shut-off stud path of travel when said stab shaft blocks said landing lever; said shut-off stud contacting said shut-off lever after said last record has been played to move said shut-off lever; and a function lever coupled to said power switch operator and responsive to the movement of said shut-off lever to manipulate said operator to open the switch contacts.

Claim 2

Dependent Claim 335 words

In a phonograph record changer of the type including a motor board supporting a rotatable turntable, a spindle adapted to support a stack of records to be played, the record stack being steadied by a stabilizer arm which is vertically movable and is mounted to a stabilizer arm stab shaft extending through the motor board, and a power switch having a switch operator for closing and opening the switch contacts to electrically energize and de-energize said phonograph record changer to control the rotation of said turntable, the improvement comprising: a cycling gear having major surfaces and adapted to rotate during a record changing cycle of operation; a shut-off stud secured for rotation with said cycling gear and projecting from a major surface of said gear; a cycling slide coupled to said cycling gear to be driven in a reciprocating movement toward and away from the central axis of said turntable during a record changing cycle of operation; a landing lever rotatably mounted beneath said motor board; said cycling slide positioned to engage said landing lever during its movement toward the central axis of said turntable such that said landing lever is rotated in a first direction; spring means coupled to said landing lever to bias said lever for rotation in a second direction; a shut-off lever coupled to said landing lever; said stab shaft positioned to block said landing lever from rotating in said second direction after a last record in said stack has been played and said cycling slide has disengaged from said landing lever during its movement away from the central axis of said turntable; said shut-off lever positioned to interfere with said shut-off stud path of travel when said stab shaft blocks said landing lever; said shut-off stud contacting said shut-off lever after said last record has been played to move said shut-off lever; and a function lever coupled to said power switch operator and responsive to the movement of said shut-off lever to manipulate said operator to open the switch contacts.

Claim 3

Dependent Claim 47 words

A phonograph record changer as defined in claim 1 wherein said motor board has notched cut-out portions and including a detent lever coupled between said shut-off lever and said function lever, said detent lever having a projection adapted to cooperate with said motor board notched cut-out portion.

Claim 4

Dependent Claim 36 words

A phonograph record changer as defined in claim 2 including a shut-off latch rotatably secured to said landing lever, said stab shaft in the blocking position held captive between said shut-off latch and said landing lever.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1976-10-01	1977-04-02	1977-10-02	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1980-10-01	1981-04-02	1981-10-02	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1984-10-01	1985-04-02	1985-10-02	$7700.00	Window Closed / Lapsed

Automatic record changer

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