Registers – Coded record sensors – Particular sensor structure
Patent
1976-04-23
1977-11-15
Kilgore, Robert M.
Registers
Coded record sensors
Particular sensor structure
235474, 3401463C, 360129, G06K 708, G06K 714, G06K 918, G11B 510
Patent
active
040587061
ABSTRACT:
A magnetic ink character reading system is provided in which multi-element read heads are positioned in a spaced apart and staggered arrangement. Data signals occurring in the analog responses of the read heads are detected, and converted to discrete logic level signals under the control of a dynamically adjustable threshold. The logic level signals of each read head are sampled in response to independent data sample signals which are phase locked to the data rate of the respective read head. NRZ (non-return-to-zero) data signals formed thereby are synchronized to a common fixed frequency, and serialized faithfully to represent the characters appearing on documents passing the read heads.
REFERENCES:
patent: 3104372 (1963-09-01), Rabinow
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patent: 3578953 (1971-05-01), Milford
patent: 3710319 (1973-01-01), Miller
patent: 3806902 (1974-04-01), Drees
patent: 3811033 (1974-05-01), Herrin
patent: 3886521 (1975-05-01), Dobras
patent: 3895350 (1975-07-01), De Vries
patent: 3949363 (1976-04-01), Holm
patent: 3978450 (1976-08-01), Sanner
Kao Charles T.
Lafevers James O.
Walker Donny R.
Demond Thomas W.
Kilgore Robert M.
Recognition Equipment Incorporated
Vandigriff John E.
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