A video controlled solid state range finding system includes an opto-electric camera and a helium neon laser. The laser applies coherent light to a beam splitter which applies a reference beam to the camera and an outgoing beam to a first angularly variable reflector which directs the outgoing beam to the object. An incoming beam from the object is reflected to a second angularly variable reflector and thus to the camera via the beam splitter. The first and second reflectors are configured with ...

This invention is directed to a device for holding an object such as a microwave oven above the burner area of a kitchen stove or range of the type commonly used in homes. The disclosed invention includes a platform for holding the object which is rigidly secured to a support. The support is adapted to engage the drip rails on both sides of the burner area of the range to hold the platform at a predetermined height above the burner area. A stiffening member is secured to the platform and to the ...

An active type of range finder includes a beam projection lens which is formed by a number of parts each having a different optical axis for use in a beam projection optical system, and a beam receiving optical system for widening the range finding angular field without lowering range finding accuracy.

An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.

A range ventilator is provided in a space with a heat exchanging partition between the contaminated exhaust air and the inflowing outside air. A duct for the exhaust air is formed between the heat exchanging partition constructed in the form of a cylinder of curved corrugated sheet metal and a cylindrical cover which can be disassembled into two halves, around the middle section of the sheet metal cylinder.

An apparatus for use in a firing range, in which transducers located adjacent the target area detect the airborne shock wave from supersonic projectiles. The position at which each projectile passes through the target plane is determined from the relative time of arrival of the associated shock wave at the transducers. A visual display of the target and the projectile position is provided for the use of range personnel.

A dryer range and the like wherein improved air flow means are provided for retaining heated air in contact with the web for maximum utilization of the heated air and for facilitating return of the spent air for reheating or for exhausting into the atmosphere to remove excess moisture or volatile material such as knitting oil and the like from the range. A pair of opposed air flow retaining baffles are carried by spaced plenums adjacent the fabric or web for thus retaining the air directed in st...

The present invention relates to a range finder of the double image coincidence system type consisting of a first optical system and a second optical system being in the light path, one of which being an optical system of variable image magnification consisting of a convex lens and a concave lens relatively moveable to each other. By moving the convex lens and the concave lens relatively to each other the coincidence image is formed in such a manner that the visibility and the magnification powe...

An apparatus for determining the distance on the earth between (a) a point below an observation point at a known height, and (b) the base of an object of a known height. The apparatus includes a stadimeter having two pivots spaced from one another and two levers mounted for pivotal rotation with a mirror on each lever which face one another and are in parallel. An object height adjustment assembly is included which has a carriage with guide means and a member for movement perpendicular to the ce...

A range guard is formed of a length of transparent resilient plastic shaped to rest on a range top and provide an upstanding wall along the front edge of the range and rearwardly extending side walls which can be resiliently flexed outwardly and have slots adapted to fit over retaining flanges on brackets secured to the range top so that the guard may be selectively mounted on the range or removed therefrom.