Dynamic magnetic information storage or retrieval – Recorder control of an external device
Patent
1987-02-20
1989-06-27
Faber, Alan
Dynamic magnetic information storage or retrieval
Recorder control of an external device
369 63, 446301, G11B 3100
Patent
active
048434973
ABSTRACT:
A talking and animated doll, toy animal or the like in which speech sounds have simulated muscle movement of eyes, jaws, etc. synchronized thereto. Sound and multiplexed motion control signals are recorded on separate recording medium channels. Sound signals are conventionally detected, amplified and applied to a speaker within the doll. The motion representing signals are digitized and applied to a microprocessor to de-multiplex and provide a plurality of motion signals corresponding to a separate desired motion. These motion signals are each applied to a corresponding servomechanism through a digital-to-analog converter. The servomechanisms each comprise a motor and a driven lead screw having a spiral groove, a carriage having a groove follow, and a thrust rod attached to the carriage to provide an output motion. A linear potentiometer responsive to the position of the carriage provides a servo feedback signal. In a variation, the servo is operated as a velocity servo to simulate the operation of an air cylinder and is responsive to a bi-polar step function control signal. A tachometer coupled to the motor provides the appropriate feedback to maintain servo velocity under varying loading of the thrust rod.
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Faber Alan
Garland Steven R.
Hertz Harvey S.
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