Abstract: A brake control system for towed vehicles is disclosed which provides for controlled application of hydraulic brakes in a towed vehicle in response to the application of the brakes of the towing vehicle. The system is designed in two preferred embodiments. The first embodiment is a self-contained design adapted for use with rental trailers, for example, where a plurality of towed vehicles will be associated with a particular trailer. The second embodiment is intended for hard wiring in connection with the towed and towing vehicles. In each case, superior performance is obtained because the system operates the brake system of the towed vehicle in a unique manner.

Abstract: A lamp finding particular application in boat trailers and other vehicular applications is provided with a generally unbreakable lens structure. The lamp preferably is provided with a plurality of LEDS arranged with rows and columns on a circuit card or board. The lamp is constructed by encapsulating the board and LED arrangement in a moldable lens material, which after removal from a suitable mold at least partially defines the lamp housing.

Abstract: A brake control system for towed vehicles is disclosed which provides for controlled application of hydraulic brakes in a towed vehicle in response to the application of the brakes of the towing vehicle. The system is designed in two preferred embodiments. The first embodiment is a self-contained design adapted for use with rental trailers, for example, where a plurality of towed vehicles will be associated with a particular trailer. The second embodiment is intended for hard wiring in connection with the towed and towing vehicles. In each case, superior performance is obtained because the system operates the brake system of the towed vehicle in a unique manner.

Abstract: A method and system for tracking the position of at least one moving object, such as, an airborne meteorological instrument from a ground processing station by intercepting wideband spread spectrum signals transmitted from a plurality of satellites in which the code sequence of the signals is not known comprises a receiver circuit in the moving object which compresses the wideband signals received into a narrow band, removes any frequency bias with a reference oscillator having a frequency offset value, forms a narrow analog base-band and transmits to the processing station at which spectral lines are produced and compared with synthetic spectrum values to determine the identity of each satellite, the reference oscillator frequency offset value is estimated, and the location and velocity of the moving object is determined.

Abstract: A relative humidity sensor includes a printed circuit board having a central passageway therethrough and a dielectric film extending across the passageway with electrodes mounted on that portion of the film in the passageway so as to generate a capacitance which will vary directly with the amount of moisture content in the film.

Abstract: A radiosonde has a novel and improved measuring circuitry for measuring atmospheric conditions, such as, temperature, humidity and pressure through the direct conversion of resistance and capacitance values into binary numbers. The binary numbers are transmitted in digital form along with calibration coefficients to a remote ground station. The measuring circuitry can be mounted on the same substrate with the pressure transducer, and the electrical connections between the pressure transducer and measuring circuitry are simplified by utilization of an offset diaphragm, pressure cell arrangement.