Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1986-09-12
1987-12-15
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250237G, G01D 534
Patent
active
047135395
ABSTRACT:
A controller device for supplying power from a power source to a load including an assembly mounted for rotation, a motor for rotating the assembly, the assembly having relatively conductive and high resistance portions and an annular flange with an opening formed therethrough, a photocell or other position detector having a light producing portion located on one side of the flange and a light sensitive portion located on the opposite side thereof, a pair of spaced brushes positioned to make contact with the assembly during rotation thereof, at least one of the brushes periodically making contact with the high resistance portion thereof, a gated current conducting element having a gate electrode operatively connected to the light sensitive portion of the photocell to produce a conducting condition therein when light from the light producing portion of the photocell reaches the light sensitive portion thereof during rotation of the rotating assembly, circuitry including connections to the brushes and the current conducting element for causing current to flow through a load device in the circuit during operation of the controller device, and an operator member movable to change the position of the photocell or detector to change the times during each rotation of the rotating assembly when the opening in the flange moves between the light producing and light sensitive portions of the photocell. The controller device may have more than one photocell, more than one gated current conducting element and more than one high resistance portion on the rotating assembly.
REFERENCES:
patent: 3831169 (1974-08-01), Raser
Nelms David C.
Seo Chung K.
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