Abstract: A radio navigation and digital communication system is used for the transmission of navigation modulation and digital data. A modulation locked loop, which may be constructed with three channels, is used to develop synchronization signals for the digital data signals and to ensure a high level of communication reliability and accuracy of navigation measurement using pseudo random navigation code.

Abstract: A venetian blind with a heat-absorptive surface on one side of the slats distributes solar heat into the ambient air of a room. For space heating the vertically-oriented, highly heat-absorptive surface of the blind has its temperature increased as solar radiation generally in the form of direct sunlight passes through the glass of the window sash and impinges on the energy-absorbing surface. Ambient air from the room moving by natural convective action, enters the air space between the window sash and venetian blind through openings in the bottom rail and between slats of the blind, passes over the heated surface in heat exchange relationship thereto, is warmed, leaves the air space through openings in the head rail of the blind and re-enters the enclosure at an elevated temperature. The other side of each slat of the blind has a reflective surface which when turned to receive the solar radiation, as in the summer, reduces heat entry into the room.

Abstract: An energy absorbing bumper system for protection of moving vehicles uses a pneumatic container that is partially flexible and partially rigid. The functional volume of air necessary on a specific bumper is enclosed within the flexible and rigid sections which are interconnected and contain air normally at the same pressure. Impact energy is absorbed by deflection of the flexible section and compression of the air. In order to limit rebound, means may be provided to control the air flow from the rigid section to the flexible section. The flexible section is contoured for a generally flat impact surface to provide efficient operation and compact size, and to yield an aesthetically pleasing shape, and is held in shape by dividing the flexible section or bag into a large number of compartments lying adjacent to each other along the direction of the surface to be protected.

Abstract: A violin has a body in the form of a tube, is constructed of inexpensive materials, such as paperboard, and with low cost and mass production manufacturing techniques. A hook on the top surface at the end of said tube can be attached to a band around the violinist's body for playing the instrument without supporting it under the chin.

Abstract: A distribution of solar heat into the ambient air of an enclosed space and a reduction of thermal energy loss from said ambient air and from said enclosed space is provided by means of a box attached to the inner side of a conventional window sash. A vertically-oriented, highly heat absorptive surface within the box has its temperature increased as solar radiation generally in the form of direct sunlight passes through the glass of the window sash, enters the front of the attached box and impinges on the energy absorbing surface. Ambient air from the enclosed space moving by natural convective action enters the box through side and bottom openings in said box, passes over the heated surface in heat exchange relationship thereto, is warmed, leaves the box at or near the top and re-enters the enclosed space at an elevated temperature.

Abstract: A suspension brassiere has an inner suspension section formed of flannel panels having perforations and connected directly to an anchor band that encircles the rib cage. The outer section is formed with cups whose outer seams coincide with the outer seams of the inner suspension panels.

Abstract: A wand hair cutter device includes an elongated handle with a razor blade holder attached to the end thereof in end-to-end relation. The blade seats between two flat portions of the device and is retained in position by means of a clasp in the end thereof for easy removal and replacement. Wedge-shaped teeth control light trimming of the hair, and the razor blade is exposed on another face of the device for shaving and sharp line cutting.

Abstract: Municipal solid waste is treated by a method in which pollution of air, water and soil is minimized. Light, long fiber paper pulp which is in great demand and fertilizer which controllably releases its nutrients are recovered which render the treatment efficient and economical. The solid waste after removal of ferrous and non-ferrous metals, glass and other aggregates, is sonically pulped to prevent shearing of fibers using such chemicals that when subsequently phosphated, and xanthated if desired, will cause salts to precipitate with inks, coatings and waxes removed from the fibers to provide fertilizers with controlled nutrient release on the one hand and high quality paper pulp on the other.