Optical waveguides – With optical coupler – Switch
Patent
1994-03-09
1995-04-18
Bovernick, Rodney B.
Optical waveguides
With optical coupler
Switch
385 19, G02B 626
Patent
active
054085500
ABSTRACT:
A remote switch system for controlling electrical devices, such as electrical lights, from a remote switch location using a single optical fiber or thin bundle of optical fibers to communicate the controlling signal from the remote switch to the device. The fiber optic system includes both an emitter and a detector at the first end of a fiber optic. The emitter sends a light signal through the fiber and the detector detects a reflected signal coming back through the fiber. Conventional switching circuits or relays turn the electrical device, e.g. a light, to a different state, such as "on" or "off", different brightness or the like in response to a pulse of light or the presence or absence of a returning signal. The remote switch is located at the second end of the fiber and includes a retroreflector positioned to reflect light exiting the second end back into the fiber and a obstructor panel having at least one pulse generating area with different light transmission characteristics movable past the end of the fiber. The pulse generating area may be an aperture in an opaque obstructor, an opaque area in a transparent obstructor panel. Plural pulse generating areas may be used in a variety of coding patterns. A plurality of switches may be provided at different locations to control a device.
REFERENCES:
patent: 4569569 (1986-02-01), Stewart
patent: 4591231 (1986-05-01), Kaiser et al.
patent: 4596442 (1986-06-01), Anderson et al.
patent: 5046806 (1991-09-01), Kidder et al.
patent: 5163112 (1992-11-01), Lefevre et al.
Lefevre Donald K.
Mulally Daniel J.
Bovernick Rodney B.
Duncan John R.
Gilliam Frank D.
Ngo John
Wireless Control System, Inc.
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