Abstract: A coadunate emitter/detector assembly for use with fiber optics. A housing has a socket for receiving an end face of a fiber optic or thin bundle of fiber optics. A detector is mounted in the socket for receiving light from a portion of the end face. An emitter is mounted close to the detector for directing light into another portion of the end face. The detector can respond to changes in the light received, which is generally varied by a device at the opposite end of the fiber optic that reflects more or less of the emitter generated light back to the detector. A condensing lens may be placed between the emitter and the fiber optic end face to maximize emitted light that enters the fiber optic. The emitter and detector may be placed in a single plain with a light barrier between them, may be stacked or may be axially spaced. The emitter may be located in a can with upstanding walls to reduce light scatter.

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.

Abstract: A remote switch system for controlling electrical devices, such as electrical lights, from a remote switch location using a single optical fiber to communicate the controlling signal from the remote switch to the device. Typically, the remote switch may be added to a normal switch near the device during modification or remodeling of a building, automobile or the like or installed in during original construction. 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" in response to a pulse of light or the presence or absence of a returning signal.