Photoelectric control structure for linear transmission devices

Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems

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Details

25023113, 341 31, G01J 132, G01D 534

Patent

active

055699065

ABSTRACT:
A photoelectric control structure for a linear transmission device, including a mount, a transmission gear mounted on the mount and coupled to a motor, a photoelectric circuit board mounted on the mount and having a phototransistor and an infrared light emitting diode which controls the phototransistor, a light chopper turned by the transmission gear to intermittently block light from the light emitting diode toward the phototransistor, and a chopper cover fastened to the mount and covering the light chopper and the photoelectric circuit board for protection, wherein when the motor is started, the transmission gear is driven to turn the light chopper, causing light to intermittently pass through to the phototransistor, and therefore the infrared light emitting diode intermittently drives the phototransistor to send a pulse wave signal to the signal input terminal of a satellite antenna allocator.

REFERENCES:
patent: 4041483 (1977-08-01), Groff
patent: 4071131 (1978-01-01), Turek et al.
patent: 4634859 (1987-01-01), Martell
patent: 4792677 (1988-12-01), Edwards et al.

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