Abstract: In a fixed-site radio transceiver station, information about a tower-mounted radio frequency amplifier apparatus can be automatically transferred from the tower-mounted radio frequency amplifier apparatus to another portion of the fixed-site radio transceiver station. The information is transferred by modulating a power supply current that is drawn from the other portion by the tower-mounted radio frequency amplifier apparatus.

Abstract: The present invention relates to a method and an apparatus for removing and recovering organic substances, primarily solvents, from industrial ventilation air contaminated with such substances. The invention is based on the adsorption of solvent in an adsorbent comprising macroporous polymeric particles upon passage of the air through a movable, so-called fluidized bed (2, 3) of the polymeric particles. These particles are fed continuously through the bed under the influence of the air and are then fed continuously into a desorption column (8), in which the solvent is desorbed from the adsorbent, stripped with the aid of heated air and drawn off to a cooler (14).

Abstract: An error-checking system in which two substantially identical modules are checked by comparing the outputs (43, 63) from the chip logic (41, 61) on each modules with each other. One module is designated a master and the other module is designated a checker. The compare logic (46 or 66) is functional only when the module that it is on is designated as the checker. A control bit designates a module as either a master or a checker. A second control bit indicates when in a first state, that a module designated as a master drives the bus, and when in a second state that a module designated as a master and a module designated as a checker alternately drive the bus. Circuitry distinguishes a warm initialization from a cold initialization. A bit in a register causes a module designated as a master to become a checker upon every alternate warm initialization, so that the module alternates between being a master and a checker only each time a warm initialization occurs.

Abstract: In a motion transmitting mechanism comprising a linearly moveable member (3) operating to and from an end stop, a compressible spring (9) is arranged between the linearly moveable member (5) and a supporting surface (10), whereby the spring is compressed when the member (5) approaches the end position and gives a force on the member (5) directed away from the supporting surface when the member is in its end position.

Abstract: A sharpening device for steel edge strips on skis which comprises a generally straight file blade and a holder for bending this blade, to limit its cutting action to a few teeth at a time.

Abstract: An operating system for trailer brakes, where the pull and pressure on the coupling unit between the tractor and trailer vehicles are utilized to control the braking power of the trailer by sensing the pull and pressure on the coupling unit and regulating the supply of braking power via an amplifier.