Mark O Moss

US Patent:

42764696, Jun 30, 1981

Filed:

Aug 17, 1979

Appl. No.:

6/067285

Inventors:

Mark W. Moss - Irvine CA

International Classification:

G06K 710
G06K 2100
G06K 1906

US Classification:

235458

Abstract:

A card reader capable of accurately reading a data card inserted in any of four possible orientations includes a card with two data tracks, a card reader producing two corresponding data pulse trains, and two differentiation networks for producing two differentiated data pulse trains. The differentiated data pulse trains are combined to form a clock pulse train and, further, are latched to produce two latched data trains. A first selector circuit assigns a first binary code value to the latched data train exhibiting the first appearing pulse and a second selector circuit sets a storage direction flag dependent upon the position of a subsequent data pulse. The latched data train assigned a first binary code value, the clock pulse train, and the storage direction flag are received by a serial to parallel converter which stores least significant digit first or most significant digit first dependent upon the flag.

US Patent:

41846320, Jan 22, 1980

Filed:

Jul 28, 1978

Appl. No.:

5/928803

Inventors:

Mark W. Moss - Irvine CA

International Classification:

G06K 714
G06K 1906
G08C 906

US Classification:

235458

Abstract:

A data card and data card reader combination including a data card incorporating two data tracks consisting of a plurality of perforations spatially arranged to represent encoded data. A card reader incorporates at least one radiant energy source, two radiant energy detectors, and guide means for guiding the movement of the data tracks between the radiant energy source and the radiant energy detectors whereby a first data pulse train and a second data pulse train corresponding to the perforations of said data tracks may be produced. An "OR" circuit receives the first data pulse train producing a clock pulse train, which in turn is fed to a holding shift register. A selector circuit selects the data pulse train exhibiting the first appearing pulse and in turn feeds the selected data pulse train to the holding shift register.