Abstract: In an alarm system utilizing a bidirectional wired television system, there are provided a plurality of alarm signal generators which are located on the subscribers' side, the signal generators generating low frequency alarm signals of the frequencies common to respective group units, the frequencies being different for respective subscribers in respective group units, each alarm signal generator being provided for each subscriber's modulators for respective group units; modulators for respective group units for modulating the low frequency alarm signals from the alarm signal generators with different high frequency carrier signals, and a receiving panel for receiving the modulated alarm signals.

Abstract: A hand held pager is disclosed which displays a transmitted message in hard copy form on a tape to permit a written record of the message for readout at the convenience of the recipient of the message. The hard copy pager is provided with a printing system in which the printing medium is continually moved past the printing head without significant degradation of the information recorded so that indexing of either the head or the printing medium is avoided. In one embodiment, the pager package includes a cover which is slipped over the main body of the package for providing part of the tape threading channel, with at least a portion of the sliding cover being transparent so that characters imprinted on the tape are readily visible through the cover. Also in this embodiment, a unique address and group call decoder includes a number of normally-off timer decoding elements which are actuated upon receipt of a decoded tone and are cross-inhibited to provide improved shock protection.

Abstract: In a vehicle, an insulated multi-turn vehicle loop arranged to form a traormer with any roadway loop when said loops are in proximity; means for tuning the vehicle loop to form a vehicle loop circuit resonant at a first frequency; and means for modulating the vehicle loop circuit at a second frequency; whereby, in use, a signal modulated at said second frequency can be induced from the vehicle loop into any said roadway loop for the identification of said vehicle; and vehicle identification means comprising a roadway loop upon or in the surface of a roadway; means for tuning the roadway loop; means for energizing the roadway loop at a first frequency at least near to the resonant frequency of the tuned roadway loop; and a vehicle identification circuit having demodulation means and frequency detection means arranged to detect in the roadway loop any signal at the first frequency modulated at a second frequency, said second frequency being produced for the identification thereof by a vehicle as aforesaid and t

Abstract: A pulse amplifier with its input across the power supply leads to an automobile radio receiver to be protected against pulse interference is used to operate a blanking gate interposed between the demodulator of the receiver and the low-frequency circuits thereof. One of the power supply leads is grounded to the vehicle body. A resistor in the ungrounded lead increases the sensitivity of the pulse interference suppression circuit without impairing receiver operation. The circuit provides interference suppression that is not dependent upon the receiver band width and therefore usable both for AM reception and for FM reception.

Abstract: A portable apparatus providing for a temporary installation of a traffic control signal meeting the visual display requirements as specified by government authorities for standard traffic control lights.

Abstract: In a two-way cable television communications system wherein a central or master station is coupled to a plurality of remote stations through a coaxial cable network, each remote unit is provided with means for decoding an emergency alert transmission signal from the master station to generate an internal signal to sound an annunciator, alerting a subscriber or viewer at the remote station that an emergency communication is forthcoming, switching on a television receiver at the remote station, if the television receiver is not on, and tuning the television receiver through a converter to a predetermined television channel to condition the television receiver to receive emergency communications from the master station.

Abstract: A remote adding and reading device useful in reading a utility meter is disclosed. The device includes a main totalizing register having a first decade counter adapted to be driven by the measuring device of the meter and an auxiliary totalizing register having a second reversible decade counter respectively contained in two distinct cases. The case containing the auxiliary totalizing register is removable, and the auxiliary totalizing register is driven by the main totalizing register through a contactless drive. Reading is accomplished by means of a portable apparatus which plugs into the case containing the auxiliary totalizing register. The portable apparatus causes the second decade counter to be reset to zero and, in the process, the quantity accumulated by the auxiliary totalizing register since the preceding reading is read out.

Abstract: A combination alarm and lighting system for being installed in a home so that when a person steps upon a door mat outside of the door home it closes an electrical circuit to a door bell and an electric lamp; the system accordingly including electrical circuit that includes in addition to the bell and lamp also a novel electrical switch contained within the interior of the door-mat.

Abstract: A signaling device for health care to indicate when the occupant of a bed is restless or out of bed incorporated into and operating in response to a specially designed array including at least two deflection elements having a crossed, "X" configuration and a control detection device transverse to the bed, the array being under the spring structure of the bed and operatively connected thereto for activating detection and circuit completing apparatus responsive to detect the deflections produced by movements of the occupant of the bed and producing a signal indicative of the movement on or from the bed.

Abstract: A generator of single wall domains, i.e., bubbles, for a bubble memory system is disclosed. The generator includes a closed feed ring, constructed of a repetitive pattern of magnetically soft chevrons, having merging input and output channels of similar chevron design. A nucleator in the input channel, driven at one-half the frequency of the rotating in-plane field, generates a bubble every other cycle of the in-plane field frequency such that only alternate positions along the input channel, and correspondingly the feed ring, are initially filled with bubbles. The bubbles, as driven around the four 90.degree. corners of the feed ring, are delayed one complete cycle of the in-plane field frequency such that the generated bubbles from the input channel and the bubbles in the feed ring fill alternate positions along the feed ring. Thus, after the first generated bubble completes two complete cycles of the feed ring, the feed ring is filled.

Abstract: A radio frequency FM repeater system receives and retransmits at the same frequency, the retransmitted signal having the same deviation as the received signal. To accomplish this the IF filter is notched at its center frequency and the receiver feedback loop is inhibited when the received IF is within the notch, i.e., at the IF center frequency. In addition, the system is stabilized and the deviations of the received and retransmitted signals are kept equal by using positive feedback within the FM receiver, the feedback loop having a gain of 0.5.

Abstract: A vehicle location system for vehicles travelling over a predetermined route in which equipment in the vehicle derives information concerning the distance travelled from predetermined junctions and the turns made and computing means within the vehicle computes the route between road junctions on which the vehicle is travelling. Each vehicle carries transmitter means for transmitting computed location information to a base station when interrogated by the same.

Abstract: A remote touch-pad control panel for a domestic appliance coordinated with a sound system for selecting domestic appliance functions whereby a different sound is audible for each function pad touched by the operator. The touch control panel has an imporforate flexible plastic skin coextensive therewith having indicia pads with the skin superimposed on a rigid outer insulating sheet having a plurality of spaced apart apertures arranged in a preselected pattern therein. The flexible skin pads have contacts on their inner surface paired with fixed contacts on an inner rigid sheet spaced by an intermediate frame from the outer sheet whereby a deflecting touch control force through the flexible plastic skin pad establishes electrical connection between the paired contacts to operate the appliance function selected and energize the sound associated therewith.

Abstract: Traffic signal apparatus utilizing a cathode ray tube to provide traffic control signals. The incandescent lamps and color filters associated with the conventional traffic control signal are replaced by a cathode ray tube and associated circuitry connected to emit desired traffic control signal colors, such as red, amber, and green. A characteristic traffic information indicium is also displayed on the cathode ray tube along with the color signal. Other signalling effects, such as directional control arrows, are also provided.

Abstract: A roadside, overspeed signal indicator is operated by a moving vehicle. Two vehicle-responsive, detectors are spaced in the direction of travel of the vehicle in a traffic lane and are preferably loop detectors embedded in the traffic lane. An adjustable first timer is in an electrical circuit responsive to the first detector and this electrical circuit, once energized, becomes and remains non-responsive to the first detector until the first timer times out. A signal, electrical circuit is responsive to the second detector if it is energized before the first timer times out. This signal, electrical circuit includes a second timer, so its length of operation in response to a signal from the second detector can be predetermined regardless of the time length of such signal. A counter is provided for counting the number of vehicles operating the first timer and another counter is provided for counting the number of operations of the signal indicator.

Abstract: An alarm transmitter device includes a storage element which stores electrical charge and which energizes an output transmitting circuit upon the occurrence of an alarm condition. To maintain the storage element at full charge or in ready standby mode, a trickle charging circuit is provided which includes an energy conversion device for converting solar energy, broadcast electromagnetic energy, heat energy or the like into an electrical current suitable for trickle charging the storage element. After the storage element is substantially discharged, subsequent to an occurrence of an alarm condition, a battery or other source of electrical energy is connectable to terminals connected to the storage element for initially rapidly recharging the storage element to the fully charged state.

Abstract: A seven character segment display assembly with each assembly including a rotatable drum carrying a character display adapted to be viewed at a window of a stationary mask. The drum includes a permanent magnet which is adapted to be attracted by the poles of a stationary wire coil wound as a bifilar center tapped winding on a core. The control circuit provides a D. C. voltage to the center tap of the coil. The circuit includes first and second invertors having outputs connected to the opposite ends of the coil. The output of the first invertor is connected to the input of the second invertor. A decoder generating logic signal pulses has an output connected to the input of the first invertor.

Abstract: There is disclosed a method and apparatus for communicating in multi- and single story building structures and parts thereof wherein a signal voltage source is connected to a metallic building structural member which is an integral part of the building. Multi-story buildings at least as high as fifty stories have been excited by utilizing a structural member such as a vertically extending stand pipe and like structural members. In such multi-story structures and in smaller structures such as one story frame, masonry and metal building structures, one of the terminals from the voltage source may be connected to earth ground by stakes or rods driven in the ground. Resistance means are inserted in the lines to limit the short circuit current and to provide a degree of impedance match.

Abstract: Circuit conduction test arrangement for emergency alarm systems having a receiving panel for a group of several sections to be supervised and including common alarm means, and a plurality of relay panels installed in the respective sections; comprising in each relay panel a sensor and an alarm device connected in parallel, said relay panels including a test switch, a reset switch and an impedance network; the receiving panel including means responsive to the variation of the input impedance, having first and second responsive devices connected in a particular manner so as to provide safe operation for the circuit conduction tests. In the test operation, the common alarm means does not operate, and only the alarm device of the relaying panel operates which has its text switch activated.

Abstract: A safety transmitting device for warning a motor vehicle at a railroad crossing of the approach of a train includes a tuning fork mechanically communicating with the tracks, wherein the vibrations of the tracks causes the fork to transmit sound waves. The sound waves are converted to the electro-magnetic waves by a transmitter unit. The fork and transmitter unit are positioned at a predetermined distance from the crossing. The electromagnetic waves are picked up by a receiver unit in the motor vehicle and converted to the electrical energy which causes activation of a sound device and flashing light unit in the interior of the motor vehicle as well as activation of an electrical pump in the brake line assembly of the vehicle which causes automatic slow application of the brakes.