Abstract: A video signal transceiver has a triax port, a baseband port, a demodulator for converting a HF video signal received at said triax port into a baseband video signal for outputting at said baseband port and at least one modulator for converting a baseband control signal received at said baseband port into a HF control signal for outputting at said triax port, a fibre-optical port, an optical receiver for converting an optical video signal received at said fibre-optical port into a baseband video signal, a switch for connecting either an output of said demodulator or of said optical receiver to a video signal line of said baseband port, and an optical transmitter for transmitting, via said fibre-optical port, an optical control signal derived from said baseband control signal.

Abstract: A triax transmitter interface for transmitting a video signal on a triax cable comprises a video signal input port, a first modulator for modulating a luminance component of a video signal received at said input port onto a first carrier and a second modulator for modulating a chrominance component of the video signal onto a second carrier, and a triax output port for outputting said modulated carriers to a triax cable. The first modulator is a quadrature modulator adapted to modulate luminance components of two video image lines simultaneously and in quadrature onto said first carrier. A receiver interface has a quadrature demodulator for restoring the luminance component.

Abstract: A precision sharpening tool is disclosed, having an opposing sharpening elements arranged to form a generally “V” shaped sharpening slot and first and second elongate guide members arranged on opposite sides of the sharpening slot which comprise mating toothed spur gears arranged so that turning the guide pin element of the first guide member simultaneously turns the guide pin element of said second guide member in aligned mirrored movement.

Abstract: A precision sharpening tool is disclosed, having opposing sharpening elements arranged to form a generally “V” shaped sharpening slot and first and second guide members arranged on opposite sides of the sharpening slot which comprise tensioned spring means arranged to urge a guiding surface against a side of a blade being drawn through the sharpening slot.

Abstract: A video signal transceiver has a triax port, a baseband port, a demodulator for converting a HF video signal received at said triax port into a baseband video signal for outputting at said baseband port and at least one modulator for converting a baseband control signal received at said baseband port into a HF control signal for outputting at said triax port, a fibre-optical port, an optical receiver for converting an optical video signal received at said fibre-optical port into a baseband video signal, a switch for connecting either an output of said demodulator or of said optical receiver to a video signal line of said baseband port, and an optical transmitter for transmitting, via said fibre-optical port, an optical control signal derived from said baseband control signal.

Abstract: A triax transmitter interface for transmitting a video signal on a triax cable comprises a video signal input port, a first modulator for modulating a luminance component of a video signal received at said input port onto a first carrier and a second modulator for modulating a chrominance component of the video signal onto a second carrier, and a triax output port for outputting said modulated carriers to a triax cable. The first modulator is a quadrature modulator adapted to modulate luminance components of two video image lines simultaneously and in quadrature onto said first carrier. A receiver interface has a quadrature demodulator for restoring the luminance component.

Abstract: A foldable hand sharpening tool is disclosed, having an elongate body/handle with a first sharpening member pivotally mounted at one end which folds into the body when not used, and at the other end having a “V” shaped sharpening slot formed by opposing sharpening members with pivotable elongate guide members which pivot into place to retain the blade in alignment in the “V” slot during sharpening and fold into the body when not used.

Abstract: This invention relates to an improved impeller puller where a first jaw is arranged proximate a first end of an elongate support frame and a second jaw, is movably mounted along the support frame spaced from the first jaw, with both jaws extending radially outwardly from the support frame in general alignment with each other, and an extraction screw member is slidably mounted along the support member so as to be variably extended in general radial alignment with the first and second jaw members, the extraction screw member being arranged to engage a shaft so as to extract the impeller from its mounting shaft.

Abstract: A foldable hand sharpening tool is disclosed, having an elongate body/handle with a first sharpening member pivotally mounted at one end which folds into the body when not used, and at the other end having a “V” shaped sharpening slot formed by opposing sharpening members with pivotable elongate guide members which pivot into place to retain the blade in alignment in the “V” slot during sharpening and fold into the body when not used.

Abstract: This invention relates to an improved impeller puller where a first jaw is arranged proximate a first end of an elongate support frame and a second jaw, is movably mounted along the support frame spaced from the first jaw, with both jaws extending radially outwardly from the support frame in general alignment with each other, and an extraction screw member is slidably mounted along the support member so as to be variably extended in general radial alignment with the first and second jaw members, the extraction screw member being arranged to engage a shaft so as to extract the impeller from its mounting shaft.

Abstract: This invention relates to an improved puller, wherein notch and slot means are arranged for adjustably engaging a mating slot and shoulder of gripping jaws to provide improved resistance to wear and misalignment through use, and reversible jaws enable adaption of use to removal of seals and the like from housings.

Abstract: This invention relates to an improved flexible impeller puller, wherein notch and slot means are arranged for adjustably engaging a mating slot and shoulder of gripping jaws to provide improved resistance to wear and misalignment through use, and engaging teeth of the jaws are arranged at an angle to the centerline to assure center hub removal with minimal damage to the hub.

Abstract: A novel product display case is disclosed having detachable and separately functional upper and lower units. The upper unit comprises a plurality of slidable display panels on which items can be secured for inspection, and can be slid aside to reveal shelves for the secure storage of items corresponding to the items on display. The lower unit comprises a display box which encases items secured for display and inspection, and is hingedly movable to reveal a plurality of shelves for the secure storage of items corresponding to items in the display box.

Abstract: This invention relates to a sheath for a knife having a handle and a fixed blade, the sheath being provided with a spring metal band which includes a resiliently displaceable arched portion extending downwardly into the sheath pocket to bear against the flat surface of the knife blade, the arched portion being supported from an intermediate portion snugly registered within a slot located in one of the sheath walls and anchored therein by a portion extending exteriorily of said sheath and at an angle to the intermediate portion, the anchor portion carrying a clip for securing the sheath to a support and the handle for the knife having a shoulder formation with a shaping corresponding to and complementary with the shaping of the upper edges of the sheath pocket for snug registration therein.