Back to results
US 4,365,326 AGranted
Record player
AssigneeSony Corporation
InventorsMitsuo Ohsawa, Hiroshi Nakazawa
Life of this patent
Estimating the term…
Abstract
A record player has a turntable, a drive means to turn the turntable, a position detecting means for detecting the rotational position of the turntable and a stopping means for stopping the turntable. The stopping means is operated by a detecting output from the position detecting means so as to stop the turntable at a predetermined position.
Claims6
A record player, comprising:
- a turntable on which a record disk is mounted, marker means on said turntable representative of a plurality of angular positions thereof, a rotary drive means for rotating said turntable with a constant speed, a brake means for stopping the rotation of said turntable, a pick-up means for detecting record signals from said record disk, a vertically movable tone arm, a position detecting means coupled with said turntable to detect the rotational position thereof by sensing said marker means, a stop means for initiating a stopping of play of the record disk, start means for initiating a start of play of the record disk, the position detecting means including storage means for storing a market corresponding to a starting angular position of the turntable when the start means is activated, and said brake means being responsive to an output from said stop means and an output from said position detecting means so as to stop said turntable at said starting angular position.
A record player, comprsing:
- a turntable;
- drive means for rotating the turntable;
- brake means for selectively stopping rotation of the turntable;
- coding means on said turntable representative of a plurality of angular positions thereof;
- a tone arm with pick-up means associated therewith;
- code reader means for reading said coding means;
- turntable rotation start means and turntable rotation stop means;
- data storage means;
- comparator means;
- and circuit means for storing a start-up position coding in said storage means when the start means is activated and for comparing sensed coding in the comparing means with the stored coding in the storage means until coincidence is achieved and activating the brake means at a time of such coincidence corresponding to the angular start-up position of the turntable.
7 more elements
A record player, comprising:
- a turntable;
- marker means on said turntable;
- drive means for rotating the turntable;
- brake means for stopping rotation of the turntable;
- a tone arm with a pick-up associated therewith;
- a frequency generator whose frequency is determined by the marker means on the turntable;
- frequency counter means having a carry output;
- start means for initiating rotation of the turntable and stop means for initiating stopping of rotation of the turntable;
- and circuit means for initiating a count by the counter means of pulses from the frequency generator when the start means is activated, the carry output of the counter means providing a signal corresponding to the start-up angular position of the turntable for each rotation, and activating the brake means after the stop means is activated and when the carry output of the frequency counter indicates that the initial rotational angular position of the turntable occurs.
6 more elements
Dependencies are inferred from the claim text.