Abstract: The trailer including a main towing device movable by articulation and sliding, from top to bottom, from front to rear and from right to left to facilitate hitching the trailer to the back of a motor vehicle using a conventional ball-type trailer hitch in conformity with international road regulations. The towing device includes a flexible fixing device to fasten the front part of the trailer to the roof of the motor vehicle through a transverse and vertical centering device which slides from front to rear through sliding rails mounted on a roof-rack, or, as an alternative, through sliding rails mounted underneath the front part of the trailer. The combination of the devices enables rapid coupling and uncoupling of the trailer and the motor vehicle, the locking of the sliding motion of the main towing device in road-ready position being automatically performed by means of locks.

Abstract: Disclosed is a Doppler tracking processor and time of closest approach detector for use in active or semi-active radar-guided missiles. A known processor uses a fractional Doppler gate (FDG) to process the Doppler signal to activate the warhead detonation properly at time of closest approach (TCA); it indicates when the Doppler energy has rolled off to, for example, one-half the pre-intercept Doppler frequency. The present invention uses a Doppler tracking processor and TCA detector. The tracking filter can extract the instantaneous value of the Doppler frequency even during roll-off. The system processes the Doppler from the pre-intercept frequency up to an appropriate fractional frequency occurring at TCA, at which time it provides a signal for use in warhead detonation.

Abstract: This invention concerns a boarding installation for vehicles for transporting passengers in air terminals comprising a support equipped with a pivoting plate and a counter-plate which are complementary, of the form of an arc of a circle, and means for controlling the pivoting.

Abstract: A pipe section positioning apparatus may be located partially below ground surface level, for example, in a trench to accurately lower and position heavy pipe sections, for example, concrete drain pipe sections, under control of a single operator who has an unobstructed view of the interior of the apparatus. The apparatus includes a body which may be positioned partially beneath ground level, an operator's platform attached to the body above ground level, an elevator within the body, a pipe cradle which is raised and lowered by the elevator and which temporarily holds a pipe section, a horizontally aligned track which is partially positioned beneath the pipe cradle to receive the pipe section and which is horizontally aligned, a ram which moves the pipe section horizontally on the track, and a pipe clamp assembly which clamps the pipe section and which then may be moved, under operator control, horizontally to accurately position and pipe section so that it may be joined with a previously laid pipe section.

Abstract: Disclosed is a Doppler tracking processor and time of closest approach detector for use in active or semiactive radar-guided missiles. A known processor uses a fractional Doppler gate (FDG) to process the Doppler signal to activate the warhead detonation properly at time of closest approach (TCA); it indicates when the Doppler energy has rolled off to, for example, one-half the pre-intercept Doppler frequency. The present invention uses a Doppler tracking processor and TCA detector. The tracking filter can extract the instantaneous value of the Doppler frequency even during rolloff. The system processes the Doppler from the preintercept frequency up to an appropriate fractional frequency occurring at TCA, at which time it provides a signal for use in warhead detonation.