Apparatus is disclosed which includes a preamplifier and a multicoupler and is responsive to VHF input signal received from a device such as an antenna to produce output signals to several independent signal processors. The preamplifier includes at least two stages, with each such stage having two amplifiers paralleled by quadrature hybrid couplers.

An expandable waist construction is disclosed herein for a garment such as a pant, trouser, skirt, or the like which includes a waistband having an elongated section joining the opposite ends of the band and a folded or cut portion joining the opposite edges of the main body of the garment such as the pant leg or skirt. In the case of a trouser or pant, the cut portion extends from the lower edge of the waistband immediately behind the pocket to a length extending to the bottom of the pocket. A ...

An electrode is disclosed having an electroconductive silicide surface on a suitable electroconductive substrate. The silicide surface is electroconductive and electrocatalytic. Also disclosed is an electrolytic cell containing an anode having a silicide surface on a suitable electroconductive substrate and an electrolytic process for the electrolysis of brines by the use of such an anode.

A single-fuselage fixed wing aircraft is provided with a recoilless rifle at the outer portions of the wing. The large caliber recoilless rifle has a rearwardly directed exhaust nozzle which emits a recoil-balancing blast of high velocity propellant gases into an area which is spaced from the tail structure of the aircraft.

The back part of a vehicle seat includes a retractable head rest located in an opening in the upper portion of the back part. When the head rest is in its raised position, an auxiliary cushion covers the opening.

A wheelbarrow having a hopper and a frame with handles at one end is provided with a spherically shaped wheel which is rotatably mounted by means of an axle and bearings at the other end of the frame to support the frame. The spherical wheel permits the frame to be pivoted readily about a vertical axis even when the wheel is engaged in a channel such as between parallel track-rails. In one embodiment, the spherical wheel contains a toroidal inner tube which grips the axle when inflated so that t...

This disclosure describes a microdensitometer having an optical system which collects transmitted light without imaging the sample being analyzed. The sample under analysis is illuminated by an unresolved focused image of the scanning aperture (e.g.: slit or hole) and approximately all of the transmitted light is collected for analysis. This microdensitometer responds linearly to irradiance transmissivity without dependence on the spatial coherence of the illumination. A coherent light source is...

Dentures are coated with a film, preferably 0.25 - 5.0.mu., of a dialkylpolysiloxane of viscosity 300 - 100,000 centipoise at 25.degree.C. The coating improves the retention of the denture in the mouth and minimizes food adhesion.

Brush having adjustable bristle hardness includes a bristle plate having a multiplicity of bristle brushes extending from one side thereof; a perforated plate located on the one side of the bristle plate and formed with a multiplicity of perforations through which the bristle brushes, respectively, extend; a cover member located on the other side of the bristle plate; an adjusting wheel disposed between the bristle plate and the cover member; and threaded connecting means extending between the p...

A photosensitive semiconductor device is disclosed which includes a substrate of N-type semiconductor material, with an area or P-type semiconductor material being embedded a preselected distance beneath the surface of the substrate. An electrical contact is connected to the substrate adjacent the central region of the area of P-type material. The central region of the P-type material provides phototransistor operational characteristics, while the junction formed between the N-type and P-type se...