Control device and method of making the same

Details Control device and method of making the same Control device and method of making the same

1979-09-17

1981-09-15

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

73705, G01D 534

Patent

active

042899630

ABSTRACT:
A control device having a housing provided with an actuator chamber separated from a pressure differential chamber by a wall having an opening therethrough receiving an axially movable actuator pin that transmits axial movement of a movable part in the pressure differential chamber to the actuator chamber, the actuator pin being separate from and engageable with the movable part. An optical switch unit is disposed in the actuator chamber and the actuator pin has an interrupter vane for actuating the optical switch unit when the movable part axially moves the actuator pin to a certain axial position relative to the housing. The actuator pin has an orientation arrangement that cooperates with an orientation arrangement of the wall opening to maintain the interrupter vane of the actuator pin in proper rotational alignment with the optical switch unit.

REFERENCES:
patent: 3989910 (1976-11-01), Russell et al.
patent: 4122337 (1978-10-01), Okuda et al.

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