Automatic record changer with cycle delay to facilitate changing of thin, lightweight records
AssigneeJames T. Dennis
InventorJames T. Dennis
Life of this patent
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Abstract
The record changing cycle of an automatic record changer having an umbrella type centering spindle is modified so that a delay is provided at the appropriate point in the cycle when the bottom record is to be released from the record stack. This delay is sufficient that a thin, lightweight bottom record has time to become unstuck from the remainder of the stack and fall downwardly before the record changing cycle is resumed, thereby preventing malfunctioning of the record changer when changing thin, lightweight records.
Claims8
In an automatic record changer, a rotatable turntable, means for rotating said turntable during both playing and record changing cycles, means for supporting a stack of records above said turntable, a driving gear on said turntable, automatic record changing means including a cycling gear, means responsive to rotation of said cycling gear during a record changing cycle for releasing the bottom record of said stack of records to be rotated by said turntable, driving means on said turntable and arranged to be moved in a predetermined path as said turntable rotates, means for connecting said cycling gear to said driving gear to initiate a record changing cycle, means defining a gap in the periphery of said cycling gear so that said cycling gear becomes disengaged from said driving gear at a predetermined point in the record changing cycle, thereby to provide a slight delay in the record changing cycle which is sufficient to allow said bottom record to break free from the remainder of the record stack, and projection means carried by said cycling gear and arranged to be positioned in said predetermined path of said driving means, said projection means being struck by said driving means as said turntable rotates, said driving gear and said cycling gear being thus re-engaged at the end of said delay to complete the record changing cycle.
In an automatic record changer, a rotatable turntable, means for rotating said turntable during both playing and record changing cycles, means for supporting a stack of records above said turntable, a tone arm mounted beyond said turntable, a driving gear on said turntable, automatic record changing means including a cycling gear, means responsive to rotation of said cycling gear during a record changing cycle for moving said tone arm outwardly beyond the edge of said record stack, releasing the bottom record of said stack of records to be rotated by said turntable and then engaging said tone arm with the deposited record, driving means on said turntable and arranged to be moved in a predetermined path as said turntable rotates, means for connecting said cycling gear to said driving gear to initiate a record changing cycle, means defining a gap in the periphery of said cycling gear so that said cycling gear becomes disengaged from said driving gear at a predetermined point in the record changing cycle, thereby to provide a delay of less than three revolutions of said turntable so that said tone arm remains at a point beyond said record stack while the bottom record is deposited on said turntable, and projection means carried by said cycling gear and arranged to be positioned in said predetermined path of said driving means, said projection means being struck by said driving means as said turntable rotates, said driving gear and said cycling gear being thus re-engaged at the end of said delay to complete the record changing cycle.
Dependencies are inferred from the claim text.