Abstract: Hazardous condition warning indications are transmitted from a site to a remote location on a conventional audio communication link. A variety of hazardous conditions including unconsciousness or inebriation of a workman at the site or his exposure to dangerous materials may be sensed and identifying information indicative of the source or location of the irregularity sensed may be transmitted to the remote location. A convention hand-held transceiver equipped with hazardous material sensors and sensors responsive to indications of potential impaired functioning of the individual are illustrated as an exemplary embodiment.

Abstract: A piston rubber with a body of substantially cylindrical exterior shape with one end thereof reinforced with a textile fabric wound into a roll that is arranged generally coaxial with the cylindrical body. The method for making the piston rubber involves winding a length of rubberized fabric around a mandrel and forming a sleeve of desired radial thickness, cutting the sleeve into bands of desired widths, and placing the bands and elastomeric material in a mold and curing the same to define a piston rubber.

Abstract: A piston rubber with a body of substantially cylindrical exterior shape with one end thereof reinforced with a textile fabric wound into a roll that is arranged generally coaxial with the cylindrical body. The method for making the piston rubber involves winding a length of rubberized fabric around a mandrel and forming a sleeve of desired radial thickness, cutting the sleeve into bands of desired widths, and placing the bands and elastomeric material in a mold and curing the same to define a piston rubber.

Abstract: A portable transceiver includes a two-piece transceiver housing which encloses a double-sided printed circuit board. The transceiver housing includes a front surface portion and a control panel portion which is integral with, but recessed below, the front surface portion. Within the control panel portion are four clearance apertures which provide operator access to the operator controls of the printed circuit board. The width and depth of the housing are suitably sized to enable the portable transceiver to be hand held in one hand while the thumb of that same hand is able to manipulate the various operator controls. These controls protrude through the various clearance apertures yet the outermost portions of the controls remain flush with to recessed below the front surface portion. The printed circuit board is a self-contained transceiver such that all wiring is completed prior to installing the printed circuit board into the transceiver housing.

Abstract: A modular aviation NAV/COM radio which is adapted for different mounting orientations and is thereby suitable for use on a variety of aircraft includes an OBS converter-indicator which is removable from the main body receiver portion. The OBS converter-indicator is able to be mounted separately from the main body receiver portion so that it can be positioned directly in front of the pilot when cockpit space is not available to mount the entire radio directly in front of the pilot.

Abstract: A keyboard entry VOR receiver incorporating a phase locked loop frequency synthesizer under processor control is disclosed. In one version a scanning VOR navigation receiver with a multitude of VOR displays operating from that one receiver and under the control of the processor also includes a keyboard for operator entry of information into the processor and a display for viewing frequency and other information during operation of the receiver. The processing means includes a central processing unit, keyboard and display interface circuitry, general input and output circuits and a memory. The display may be a conventional omni bearing selector and course deviation meter arrangement or a plurality of three digit bearing displays may be employed.

Abstract: A modular radio, adapted for different mounting orientations and thereby suitable for use on a variety of water and air crafts. One embodiment pertaining to marine radios includes a head which is removable from the main body and a control panel which is detachable from the head. The main body can be secured within the vessel at virtually any height by means of a U-shaped bracket. When the radio is approximately waist high, the head and control panel are arranged so that the controls read left to right and are in an upwardly-facing orientation, normal to the user's line of sight. When the radio is mounted overhead, the head and control panel are arranged so that the controls read left to right and are in a downwardly-facing orientation, normal to the user's line of sight. The head and main body are adapted to be mounted to the vessel separately from one another. Another embodiment, pertaining to aviation radios, includes a converter indicator which is removable from the main body portion.