Abstract: A device is provided, associated with the accelerator pedal of motor cars adapted to cause the lighting of the brake lights shortly before the brake pedal is applied in case of braking in an emergency. In one version of the device, it comprises a bellows mounted on the accelerator pedal. During normal driving, the bellows is pressed down to minimum volume thereof. When abruptly released, a sub-pressure is developed which is used to momentarily lift a metal flap which closes the brakelights circuit. The lights remain on until the light circuit is taken over by the brake pedal switching circuit. According to another version, the operation is based on the relative abrupt movement of a magnetic core surrounded by an induction coil. The electromotive force will generate a current effective to close the brakelights circuit.

Abstract: The system includes a plurality of sensor devices each arranged to monitor a respective physical or operating magnitude of apparatus, a device or a member of the vehicle, and to provide corresponding electrical signals. An acoustic signal generator provides a plurality of acoustic characterizing signals, indicative of corresponding predetermined operating conditions, and a plurality of acoustic level signals indicative of corresponding predetermined levels of importance attributable to the operating conditions. A processing unit detects on the basis of signals provided by the sensor devices the operating conditions of the vehicle and attaches in a predetermined manner, a level of importance to each operating condition identified, and supplies to the acoustic signal generator electrical control signals for causing the output of an acoustic signal comprising, in succession, the level signal and the characterizing signal associated with the operating condition detected.

Abstract: An alarm system for a vehicle is disclosed. The alarm system is responsive to theft of the vehicle either by pulling the lock mechanism or by starting of the vehicle through the forced entry of the bowl plate. The alarm system further includes a signal system remote from the detection system for emitting a single frequency for detection remote from the vehicle. The detector may include distance and direction detection from the detector to the vehicle.

Abstract: Apparatus for measuring mass flow of a fluid in a conduit by which the fluid passes through a moveable chamber which establishes a constant velocity profile of the flowing fluid at the outlet opening of the chamber. Measurement of momentum force at the control surface defined by the outlet opening of the chamber permits accurate mass flow measurements by application of the momentum equation.

Abstract: An overfill sensing system uses a capacitive sensor (12) on the interior of a tank for sensing the presence of a liquid to cease the filling process. The capacitive sensor (12) includes a sensing capacitor (16) and a reference capacitor (18) on separate arms of a bridge circuit (22). An oscillator (28) supplies an AC signal to the bridge circuit (22) divided by a variable resistor (30 ) to balance the bridge (22). A comparator (24) receives the output on each arm of the bridge (22) to sense a differential therebetween. When a liquid reaches the sensing capacitor (16), the capacitance changes from a predetermined capacitance, thereby changing the differential. A control circuit (14) is responsive to the differential at the output of the comparator (24) for visually indicating the status of the filling process and ceasing the filling process from the filling facility when a liquid has been detected.

Abstract: An image change detection system for observing an environment to be monitored, such as a region proximate a vehicle, by sensing energy from the region and generating a plurality of pixels which form an image of the region. The system stores a first image of the region and matches pixels of a subsequent image of the region with pixels of the first image to detect deviations between corresponding pixels. The system indicates when the pixel deviations exceed a preselected threshold to detect an abnormal condition in the region. Also a method of monitoring the environment about a vehicle by sensing a first image, sensing a subsequent image, matching the pixels of the subsequent image with the pixels of the first image to detect deviations between corresponding pixels, and indicating when pixel deviations exceed a preselected threshold.

Abstract: A remote indicator for displaying the position of a power control switch whether or not power is applied to the switch. An auxiliary DC power supply provides a reference potential to a plurality of voltage dividers. One voltage divider provides a first reference potential to a comparator. A second voltage divider and the reference power supply are connected through the power control switch so that a second reference potential is applied to the comparator when the power switch is closed. Differences of the two reference potentials corresponding to the open and closed switch positions are sensed by the comparator and used to activate an indicator accordingly.

Abstract: An automobile burglary detecting circuit for use with an automobile electrical system having an electrical accessory activated by a switch. The detecting circuit also includes a signal generator for imposing an oscillating signal on the electrical system, and a signal detector which detects the signal from the system. An alternative embodiment includes a further signal generator which is responsive to the signal detector, and which imposes a second oscillating signal on the electrical system. The second oscillating signal is detected by a filter which activates an alarm.

Abstract: A wavelength division method and system employing a radiation transmissive planar waveguide provided with collimating and focusing lenses and with a periodic radiation transmissive diffraction grating incorporating radiation reflecting elements in spaced array, preselected, in demultiplexing service, to separate into individual entities an optical signal input constituting a multiplicity of coherent radiation signals of different characteristic wavelengths transmitted simultaneously via the waveguide and, in multiplexing service, to consolidate a multiplicity of coherent radiation signals individually introduced to the grating via the waveguide along angular courses substantially coincident with the angular courses taken by individual radiation signals of corresponding wavelengths exiting the grating during demultiplexing service, and means directing the signals to dedicated receptors.

Abstract: A low liquid level sensor fabricated on a silicon substrate having four temperature dependent elements formed thereon in a Wheatstone Bridge configuration. A thin, wire-like extension of the substrate between two openings within the substrate provides a mounting member for the fourth element. The other three elements are spacially separated from the fourth element such that the fourth element becomes exposed to air during a low liquid level condition while the other three elements remain submerged within the liquid. Accordingly, the Wheatstone bridge configuration and relative positioning of the elements on the substrate eliminates the need for corrections due to temperature variations and power supply fluctuations.

Abstract: A unitary element for use in measuring the total and static pressure of a gas flowing through a duct is disclosed in a preferred embodiment. The element is elongated and hollow, having a continuous, impermeable wall dividing the interior into total and static pressure chambers. In cross section, the element is of aerodynamic or airfoil shape, having a curved forward edge and converging toward the trailing edge adjacent which the outer surfaces are parallel for a short distance. Spaced openings along the forward edge and the upper and lower portions of the rearwardly converging wall portions communicate with the total and static pressure chambers, respectively. Separate manifolds communicate with the total and static pressure chambers of a plurality of such members arranged across an air flow duct to obtain average pressure readings across the cross section of the duct.

Abstract: A non-verbal communication system for work stations characterized by a work station for the assembly of parts by an assembly operator into a workpiece which work bench includes a plurality of bins for storage of various parts; a punch card reader at the work station including a light source and an array of separate aperture areas disposed in juxtaposed columns and rows, and a plurality of fiber-optic cables having first terminal ends disposed at the aperture areas and having second terminal ends located in the several parts bins, thereby illuminating indicators at the bins of specific parts to be selected by an assembly operator for assembly into a workpiece.

Abstract: A blown circuit breaker indicator utilizing an illuminating device such as a light-emitting diode for indicating whether either a thermal electrical or magnetic circuit breaker has been tripped. The indicating device is provided in a circuit parallel to the main switch of the circuit breaker and includes a reactive element such as a capacitor. The value of the capacitor is less than or equal to 11,000 picofarads.

Abstract: Apparatus for recording the opening or closing of a closure member, comprising a device for providing an electrical signal on opening or closing of the closure member or on actuation of an ancillary device associated with opening or closing of the closure member, an electronic circuit adapted to generate one of a number of unique codes on receipt of the electrical signal and to store the generated code, and a display device for displaying the generated code. In one form of the invention a reusable seal for a vehicle or container comprises a housing, and a cable secured at one end to the housing and releasably attached to the housing at the other end by a locking mechanism. Operation of the locking mechanism causes an electronic circuit in the housing to generate a random number, which is displayed by an LED display when a button is pressed. Any change in the number displayed indicates that the cable has been released. The seal can be used in the same way and can be repeatedly re-used.

Abstract: A door closer which is capable of issuing a selected sound or remaining silent when the associated door is opened and which can be mounted on an existing door opener mechanism. Two covers are provided which are mounted on opposite ends of a door closer mechanism body. One of the two covers carries a speaker, while the other carries a sound generating circuit, sensors, and a changeover switch. The changeover switch is used for selecting among, for instance, an alarm sound, a melody chime, and silence. An operating lever for the changeover switch extends through the cover to the outside for ease of selection.

Abstract: A passive type forward/aft indicator for mounting on an aircraft refueling tanker. The indicator providing the appearance of an ascending liquid thermometer for guiding an aircraft to be refueled. The indicator providing proper longitudinal positioning underneath the tanker. The indicator can be used equally well for space docking and other types of rendezvous missions.

Abstract: The motor chamber of an automotive vehicle horn is vented to the atmosphere through a hole in the diaphragm. The hole is located on a vibratory portion of the diaphragm and is laser drilled to obtain an accurately dimensioned hole with smooth edges.

Abstract: A security installation comprises sensors arranged in and around a building which transmit digital information to a central station by radio, in each case preceded by an access code specific to the particular installation; signals inadvertently received from the sensors of an adjacent installation are rejected. The information is transmitted by encoding a multiple bit word incorporating the access code, a code identifying the particular sensor, and the actual data, using Manchester II coding on an FSK transmission. Each such word is sent several times to form a data packet. The master station tests the received data for the correct format and for the correct access code. Recognition is only complete when within a particular packet, at least two (say) sequential words and at least two other words are recognized.

Abstract: A means and method for detecting the presence of electrically conducting fluid whereby a signal is actuated upon the presence of fluid. The method of the invention includes placing two conducting members at the location to be monitored. A gating device having an electrical pathway to the signal device is actuated upon receiving sufficient biasing voltage. A voltage dividing network allows sufficient bias in voltage in two ways, either by the shorting of the two conducting members of the probe by electrically conducting fluid, or by the breaking of the circuit path between the electrical power source and the probe ends. The means of the invention utilizes a gating device having a biasing input connected to the middle of a voltage dividing network. Two conducting elements of a probe are attached to a point before the voltage dividing network and in the middle of the voltage dividing network respectively.

Abstract: A separation type light blocking smoke detector detects smoke present between a light emitting section and a light receiving section spaced therefrom by detecting blocking of light between the light emitting section and the light receiving section. The detector includes a light emitting section driving circuit, a counting circuit, and a storage circuit. The light emitting section driving circuit changes the emission intensity of the light emitting section in accordance with a predetermined changing mode for every repetitive cycle. The counting circuit includes a first comparator and an updating signal generator, and counts a physical amount corresponding to a period during which an output from the light emitting section falls in a predetermined range for each repetitive changing cycle. The storage circuit includes a second comparator and an AND gate, and stores a count value of the counting circuit in an arbitrary repetitive cycle.