Electrical shock proof fiber optic control system

Details Electrical shock proof fiber optic control system Electrical shock proof fiber optic control system

1985-01-23

1987-04-07

Lee, John

Radiant energy

Ionic separation or analysis

Static field-type ion path-bending selecting means

250227, 350 9610, 350 9624, G02B 642

Patent

active

046555447

ABSTRACT:
An electrical shock proof fiber optic control system is disclosed which provides the equivalent of a multiple contact slide switch in optical form along with a fiber optic decoder/interface. Provision is made for single pole switches and multiple throw switches with any number of switch contacts. A novel proportional controller is also provided which varies the amount of light transmitted to a photo-detector by placing a variable optical density filter in series with the light path at the remote control point. One embodiment uses a sliding filter whose optical density is proportional to the lateral displacement of the filter.

REFERENCES:
patent: 3805048 (1974-04-01), Brennesholtz
patent: 3941485 (1976-03-01), Madden
patent: 4184070 (1980-01-01), McBride
patent: 4193662 (1980-03-01), Hara
patent: 4356395 (1982-10-01), Miller
patent: 4359637 (1982-11-01), Perren

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