Abstract: A remote annunciator system in which the emission of an acoustic signal by a first annunciator is detected by an acoustic signal detector which causes a radio frequency transmitter to transmit a radio frequency signal. A radio frequency receiver which receives the signal operates a second annunciator which is remote from the first annunciator, to cause the second annunciator to emit an audible or visual signal. Preferably, the radio frequency signal is encoded and is decoded at the receiver, and if the first annunciator can emit two different accoustic signals, the transmitted signal is encoded dependent upon which acoustic signal is emitted and the receiver decoder causes the second annunciator to emit an audible signal or a visual signal which depends on the transmitted signal encoding.

Abstract: Push button controlled wireless transmitters send digitally encoded signals to a plug-in receiver/signaling device. The receiver/signaling device has a microprocessor suitably programmed to respond to signals from a transmitter bearing the discrete address of the receiver, and to decode a transmitter identification code. Thereupon the microprocessor supplies an audio output circuit with signals to simulate selectively mechanical front or back door chimes, and supplies signals to energize a strobe lamp to emit bursts of multiple flashes, the number of flashes in a burst identifying the specific transmitter, whereby a person with a hearing deficiency is informed as to which transmitter is being actuated.

Abstract: A language information system in which a patron in a given location, such as at a play, on a train, or bus, or in a hotel room, is provided with information, or a running commentary, or summary of an event taking place in a language of his choice. In a preferred embodiment of the invention, the patron can select any one of a number of languages which are pre-recorded on a magnetic tape. The starting and stopping of the tape is cued by action taking place during the event.

Abstract: A record card having a plurality of bits arranged in a predetermined pattern, where at least one of these bits is adapted to be permanently "debited" by a corresponding apparatus. Each "debit bit" has a constricted neck which is adapted to be burned out by an electrical signal of predetermined magnitude and duration. The apparatus supplies this signal to the "debit bit"0 when the record is properly positioned and subsequently confirms that the bit has been properly debited.

Abstract: There is disclosed an intermittent data tracker that is capable of provid smooth target tracking data from intermittent target range data. The heart of the intermittent tracker is an instantaneous position memory (IPM) which can instantaneously memorize the range of a target video signal, and play it back immediately, or at any later time, with no loss in accuracy. The IPM is updated in accordance with computed target velocity, and corrected as necessary by comparison of the predicted range with the measured target range derived from the tracking radar video.