Abstract: A wearable transmitter assembly includes a housing containing a radio frequency transmitter and tamper detecting circuit that are attached to an appendage of an individual with a buckle and strap. A light emitter and a light sensor are disposed in the housing and extend to the outside of the housing through one or more apertures. The strap includes an embedded optical fiber. Attachment of the housing to the buckle positions the emitter and sensor adjacent the ends of the optical fiber in the strap to complete an optical path or circuit from the emitter around the appendage to the sensor. The housing is sealed closed, including sealant between the emitter, the sensor and the aperture, providing a water tight enclosure for said transmitter from the time of its manufacture. Attachment of the housing to the buckle completes a seal blocking contaminates, such as water, water vapor, and soap from the ends of the optical fiber, the emitter and the sensor.

Abstract: The invention is a gas mixture for a diffuse discharge switch which is capable of changing from a conducting state to an insulating state in the presence of electrons upon the introduction of laser light. The mixture is composed of a buffer gas such as nitrogen or argon and an electron attaching gas such as C.sub.6 H.sub.5 SH, C.sub.6 H.sub.5 SCH.sub.3, CH.sub.3 CHO and CF.sub.3 CHO wherein the electron attachment is brought on by indirect excitation of molecules to long-lived states by exposure to laser light.

Abstract: This safety monitoring system for punch press operators is designed to prevent the operators from being injured by such presses or other factory equipment. Primarily, it consists of a pair of wrist units which are strapped to the wrists of the operators, and which include optical fiber cables and a latching assembly, and the optical fiber cables are used in cooperation with a pair of identical electronic circuits employing LED's, a light sensitive transistor, a pair of other transistors, a zener diode, and a relay, for instantly shutting a punch press on or off.

Abstract: A contact probe arranged to detect dislodgement of the probe from a body to which it has been attached. Probe dislodgement is detected by sensing an increased radiation level falling on a main sensor (14) located in the contact surface (10a) of the probe. The main sensor cooperates with a reference sensor (16) located in another surface (10b) of the probe which receives radiation reflected from the skin of the body to which the probe is attached. The reference sensor (16) provides a floating reference for the main sensor (14). In addition to providing an indication of probe dislodgement, the two sensors cooperate to develop an indication when they are shielded from the radiation source, thereby rendering the probe inoperative to sense probe dislodgement.

Abstract: A probe having a contact surface adapted to be placed on a body surface to monitor or control a body function. When the probe is dislodged from the body, an increased radiation level impinging on the contact surface is sensed and an indication of probe dislodgement is provided.

Abstract: An apparatus for detecting and signalling the presence and absence of movement of an object moving randomly in space and time has a portable transmitter carried by the moving object, such as a human operator. The transmitter transmits a carrier frequency signal so long as the operator continues his random movements. A detector associated with the transmitter detects the random movements and has sensing means which is a sensor that responds to the operator's movements and is movable randomly in three dimensions in response to the movements. The detector has a photo-responsive switch activated by the movement sensor which interrupts the emission of the carrier frequency signal when the human operator is substantially immobile and permits the transmission once the operator renews his movement. A receiver is positioned in an area for receiving the carrier frequency signal.

Abstract: A non-duplicative switching arrangement for controlling a video or radio frequency switch is used in a cable television system for controlling the application of a distant station signal to the cable system to eliminate duplication in programming. A clock provides an output indicative of the day and time while a timing means, responsive to the output of the clock provides timing signals. Switching is programmed on a transparent matrix disc which has a plurality of concentric circular rows of matrix positions. Each row corresponds to a day of the week and the matrix positions are aligned radially with respect to the disc in columns which correspond to daily time segments. The light transmitting characteristics of selected ones of the matrix positions are altered impermanently in order to program the switching arrangement. A stepping motor is provided for rotating the disc at predetermined times and an optical reader determines the light transmitting characteristics at each successive matrix position.