Abstract: An indicator device for providing a high-intensity visual indication of an occurrence comprises a flash tube which is fed with a high voltage from a capacitor, the capacitor being charged by means energized from an intrinsically safe supply. Trigger pulses are applied to the flash tube in response to the occurrence, so that the tube emits flashes in response thereto. An annunciator can comprise a plurality of the devices housed in a single unit and fed from a single power supply.

Abstract: An electron beam is used for reading signals in the form of surface modulations on a thermoplastic recording. In order to improve the signal to noise ratio the thermoplastic recording is first charged using a flood beam source of electrons and the surface charge so produced repells scanning reading electrons which are then collected by a detector.

Abstract: A keyboard entry circuitry for calculator purposes is of the key strobing type wherein one each end of respective key of a keyboard is operatively coupled with corresponding digit time signal or key strobing signal while the other ends of the respective keys are connected in common with each other, whereby the identity of a specific actuated key is provided by determining which one of the key strobing signals is developed via that actuated key. Two kinds of digit time signals are placed within a one-word time sequence, one having different timing phases for the respective keys for key strobing purposes set foth above and the other having the same timing phase for all the keys for shortening a period of time required for key determinations. Once there is a equivalency with respect to both the key strobing digit time signals and the common digit time signal, the indication of any actuated key is provided.

Abstract: An alarm unit for a humidity sensor activates an alarm circuit when the relative humidity rises above a certain value or under certain malfunction conditions such as a missing sensor or a cut cable, includes a first circuit for establishing a reference signal, and a second circuit adapted to be connected to a humidity sensor for responding thereto and for generating a humidity out-of-limits signal. A third circuit responds to the reference signal and to the humidity out-of-limits signal to generate an alarm signal. The third circuit includes a level detector, and the first circuit comprises an impedance device which cooperates with the second circuit which in turn connects the sensor to the input of the level detector, the sensor being a variable impedance device.

Abstract: A selective calling receiver comprises a resettable sound circuit for generating an audible calling sound in response to a calling message, a display circuit for visually displaying a message and a control circuit which is manually operable to reset the sound circuit and simultaneously activate the visual display circuit so that the message can be read.

Abstract: A touch controlled switch system operable by human touch inputs includes an intercommunication feature to enable communication between remote touch controlled switch units over a power line. The system comprises a transmitting unit including a first touch receptor operable by touch inputs for applying coded message signals to the power line and a receiving unit including a second touch receptor operable by touch inputs and a control switch circuit for operating a load coupled to the circuit in response to touch inputs applied to the second touch receptor. The receiving unit also includes a message sensing circuit responsive to the coded message signals on the power line for operating the control switch circuit in response to touch inputs applied to the first touch receptor. The system allows devices at remote locations to be operated either by touch inputs applied at remote receiving units or by touch inputs at one or more master transmitting units to generate coded message signals on the power line.

Abstract: A self-contained emergency signaling device is removably mounted to a carrier, such as a fireman's helmet or oxygen tank. While mounted on the carrier, a high-intensity strobe light signals the position of the carrier. When detached from the carrier, a position-fixing sound producer is automatically actuated, in addition to the strobe light.

Abstract: Signals from a high frequency transmitter outside of the biological object are received in a resonant receiving circuit inside the object whose resonant frequency corresponds to the value of the parameter being measured. The signal from the resonant receiving circuit is applied to the input of a frequency multiplier whose output is connected to a second resonant circuit tuned to the multiplied frequency. The second resonant circuit transmits a return signal to a receiver outside of the biological object which is also tuned to the higher frequency. The signal at the receiver will have a maximum amplitude when the transmitter frequency is equal to the frequency of the first resonant circuit as tuned by the value of the parameter. The adjustment of the transmitter frequency required for receiving maximum energy at the receiver is a measure of the value of the parameter in a first embodiment.

Abstract: A device for signaling traffic on highways is disclosed herein and includes an elongated handle fixedly supporting a sign board on one end thereof. The board is provided with a central opening for mounting or placement of a flash tube or bulb so that the light rays radiating from the bulb progress outwardly from both sides of the board. A pair of parabolic reflectors are arranged in back-to-back relationship to increase the illumination of light be radiated. The bulb is carried on a snap-clip which secures a pair of reflectors together and a Fresnel lens covers both reflectors to further enhance the light radiation. The board includes a display area for carrying indicia co-related to warning of the traffic. Batteries in electrical circuits connected to the bulb, a switch and an interruption circuit are carried in the elongated handle.

Abstract: A centralized monitoring system for gas leakage in which a plurality of remote terminal units are connected by a loop line and each remote terminal units is further connected to one or a plurality of gas leakage detectors which produce analog signals representing the degree of gas concentration. Each remote terminal unit converts the analog signals from the gas leakage detectors into digitally coded block data and then transmit the block data together with an address code in time division fashion to a central monitoring station also connected to the loop line for processing the block data to provide display of the status of the gas concentration at the central station. In the transmission of the data through the loop line, a double transmission check system and a loop line switching means are employed to achieve reliable and fast data transmission.

Abstract: A standard format keyboard provides a paralleled, binary-coded output corresponding to an alphanumeric character or a function when the appropriate key head is depressed. A signal is coupled through the key mechanism to a set of parallel conductors which are positioned to be approached by a portion of the key mechanism. The conductors have minimum or maximum areas corresponding to binary zeros and ones, whereby the level of signal coupled also corresponds to a binary code (such as ASCII) for the character or function key depressed.

Abstract: A lighted display board or sign has a viewing face subdivided into 25 squares arranged five by five simulating a Bingo playing card and having a separate light positioned behind each square. An unusual circuit and switching arrangement makes it possible by merely closing a single switch to cause the lights on the board to indicate to the players what particular design, such as an "X", cross, square, etc., must be attained to obtain a "Bingo" or winner for the particular game then in progress. An on and off flashing light spelling out the words Bingo forms a part of the basic circuit.

Abstract: A hand safety flasher for use in directing traffic by construction workers, at school crossings, by police, and so forth, comprises a hand-held receptacle for containing a plurality of flashlight cells together with a double lens safety structure having a light bulb contained therein and a flasher structure between the series connected flashlight cells and the bulb for intermittently flashing said bulb when the device is switched to the "on" position. One side of the lens may be amber, the other side red, and an indicating directional arrow may also be provided.

Abstract: A conventional lens system projects an image on a planar array of light sensitive elements of a charge coupled device from which digital signals containing the picture information are produced and stored for reproduction by a mechanical printer.

Abstract: An emergency detection alarm and evacuation system adapted for use in a multi-storied building comprises a plurality of spatially distributed fire/smoke detectors and a plurality of exit signalling units respectively located adjacent the emergency exit doors on each building floor. A control panel on the lobby floor of the building includes lighted indicators which respectively indicate the actuation of particular fire/smoke detectors and lighted pushbutton switches operative to selectively actuate specific signalling units to thereby direct the building occupants to particular exit doors. Also disclosed is a closed circuit television system for visually monitoring the fire/smoke conditions in particular floor areas, for use in conjunction with said exit signalling units.

Abstract: An aircraft take-off and landing system, wherein a symbol of a specified configuration is employed as an instrument means for take-off and landing.This symbol is formed by directed extended references made up of electromagnetic pencil beams with a wavelength which is within atmospheric windows, produced by at least one source of electromagnetic radiation, positioned on a flight platform. The electromagnetic pencil beams are oriented in space so that they determine the configuration of a symbol and, simultaneously, indicate the course and glide slope of an aircraft take-off and landing path, set a spatical take-off and landing corridor wherein this path lies, and show additionally various limits of a take-off and landing platform or various marker points of an estimated take-off and landing path.

Abstract: A monitoring system is disclosed that is particularly well suited for use in connection with combustion in a cloud seeding generator. The monitoring system includes an indicator light the energization of which indicates a specific combustion state and normally indicates that combustion has occurred. Energization of the indicator light is controlled by a comparator which has one input connected with a thermocouple positioned in the combustion chamber to monitor the combustion state. The cloud seeding generator is preferably mounted in an aircraft and, when so mounted, the indicator light may be remotely located as, for example, on the aircraft instrument panel to indicate combustion and/or ignition as well as proper operation of the cloud seeding generator.

Abstract: An adapter unit converts a standard traffic controller system for operation to a pedestrian clearance mode where a DONT-WALK signal flashes during the interval when the green traffic signal is nearing the end of its period. The unit counts down line frequency to provide an on-off flash signal producing in the order of 55 flashes per minute and is interspersed in the connecting line between the standard controller switch and the pedestrian lamps. It operates with solid state circuits which are isolated from the controller's a-c voltage phases operating the traffic and pedestrian signal lamps.

Abstract: A current carrier communication system for selectively transmitting binary electrical signals from a first location to a second location over the AC power lines in a AC power distribution network in a building comprising a first tone generating means operatively connected to a first source of binary electrical signals for generating a first tone signal at a first frequency, a second tone generating means operatively connected to a second source of binary electrical signals for generating a second tone signal at a second frequency, linear tone summing means operatively connected to the first and second tone generating means for generating a modulating signal output that is a linear sum of the first and second tone signals, a source of RF signals connected to said linear tone summing means to produce a modulated RF output signal modulated by the modulating signal output of the linear tone summing means to the AC power lines, receiver coupling means at said second location directly coupled to receive said modula

Abstract: An aircraft instrument with a reflective screen on which the pilot views a collimated head up display of flight guidance information against a background of the outside world, for low altitude maneuvers. The guidance information includes a pitch stabilized reference indicia and a flight path indicia. The pitch reference and flight path indicia are positioned on the screen in accordance with aircraft operating parameters and pilot inputs to provide for a flare maneuver to touchdown or to direct the pilot in a path parallel with the surface of the ground, as for ejecting cargo.