Electricity: motive power systems – Automatic and/or with time-delay means – Radiant energy
Patent
1977-09-22
1979-01-02
Dobeck, B.
Electricity: motive power systems
Automatic and/or with time-delay means
Radiant energy
318446, 274 15R, H02P 506
Patent
active
041329350
ABSTRACT:
When the user presses a touch-activated switch a first time, a first digital storage device becomes set and furnishes a platter-motor-start signal to the control electronics of the platter drive motor. If the touch-activated switch is pressed a second time, the first digital storage device becomes reset, and the signal commanding that the platter drive motor operate terminates. A second digital storage device likewise assumes its set and reset states in response to the first and second pressing of the touch-activated switch. Sensors ascertain various operating conditions during the course of turntable operation, such as the swinging of the tone arm to the position corresponding to the lead-in groove of a phonograph record. The states of the digital storage devices are additionally dependent upon the conditions sensed by the sensors. Logic circuitry interprets the combinations of states of the digital storage devices and causes the requisite turntable operations to be performed, e.g., lifting and lowering of the tone arm, inward and outward swinging of the tone arm, initiation and termination of rotation of the platter, audio muting, and the like.
REFERENCES:
patent: 3525028 (1970-08-01), Ruoss et al.
patent: 3662363 (1972-05-01), Chertok
patent: 3993315 (1976-11-01), Hansen et al.
patent: 4027217 (1977-05-01), Harman
patent: 4085940 (1978-04-01), Hoshimi
Gaus Harry
Johnson Jeffrey
Milutziki Udo
Schotte Dietwald
Braun Aktiengesellschaft
Dobeck B.
Striker Michael J.
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