Magnetic disc coder-decoder
AssigneeThe United States of America as represented by the Secretary of the Army
InventorVesper A. Schlenker
Life of this patent
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Abstract
1. A magnetic disc coder-decoder comprising a rotatable magnetic disc mea said disc means being adapted to have a code comprising a plurality of tone bursts recorded thereon, means for rotating said disc means, means for taking said tone bursts from said disc means and transmitting said code in the form of pulses of radiant energy, means for receiving transponder reply pulses in the form of coded infrared flashes, means for converting said infrared flashes to tone bursts, means for recording said tone bursts on said disc means, a coincidence detector, means for taking said tone bursts from said disc means and means for applying said tone bursts to said coincidence detector, said coincidence detector providing a single pulse output only upon simultaneous application thereto of a predetermined number tone bursts.
Claims8
A magnetic disc coder-decoder comprising a rotatable magnetic disc means, said disc means being adapted to have a code comprising a plurality of tone bursts recorded thereon, means for rotating said disc means, means for taking said tone burst from said disc means and transmitting said code in the form of pulses of radiant energy, means for receiving transponder reply pulses in the form of coded infrared flashes, means for converting said infrared flashes to tone bursts, means for recording said tone bursts on said disc means, a coincidence detector, means for taking said tone bursts from said disc means for applying said tone bursts to said coincidence detector, said coincidence detector providing a single pulse output only when simultaneous application thereto of a predetermined number tone bursts.
A magnetic disc coder-decoder comprising a rotatable disc having first and second sound tracks adjacent the rim thereof, means for rotating said disc, a first magnetic head positioned adjacent said first sound track, a plurality of second magnetic heads positioned adjacent said second track, said first sound track having a single tone burst recorded thereon, means connecting said first magnetic head to each of said second magnetic heads whereby said single tone burst is simultaneously recorded by each of said second magnetic heads on said second sound track, a third magnetic head positioned adjacent said second sound track and means connecting said third magnetic head to a radio transmitter whereby a series of pulses of radiant energy representing said tone bursts are transmitted.
A magnetic disc coder-decoder comprising a constant speed motor, a plurality of coder discs affixed to the shaft of said motor and rotating therewith, each of said coder discs having a sound track adjacent the rim thereof, each of said sound tracks having a tone burst recorded thereon at a different sector thereof, a magnetic head adjacent each of said coder discs, means connecting each of said heads to a radio transmitter whereby pulses of radiant energy representing said sound bursts are transmitted, a decoder disc having a sound track adjacent the rim thereof affixed to said motor shaft and rotating therewith, receiver means for receiving coded infrared flashes and converting said flashes to tone bursts, a recording head, means connecting said recording head to said receiver means whereby said tone bursts are recorded on said decoder disc sound track, a plurality of pickup heads adjacent said decoder disc sound track at sectors corresponding to said different sectors of said coder discs, a coincidence detector and means connecting each of said pickup heads to said coincidence detector, said coincidence detector providing a single pulse output only upon receiving simultaneously a predetermined number of tone bursts from said pickup heads.
Dependencies are inferred from the claim text.