Check-actuated control mechanisms – Control mechanism actuated by check – other than coin – which... – By pliant currency
Patent
1992-11-25
1994-10-25
Bartuska, F. J.
Check-actuated control mechanisms
Control mechanism actuated by check, other than coin , which...
By pliant currency
360113, G07D 700
Patent
active
053580885
ABSTRACT:
An apparatus and method for detecting magnetic data on media is disclosed which utilizes an array or arrays of horizontal magnetoresistive sensors. The present invention detects the pitch or separation of magnetic transition data on the magnetic medium under test, and generates a signal that is independent of the velocity of the medium. In one embodiment, the magnetoresistive sensors employed in an array are spaced apart a distance which corresponds to the separation of magnetic transition data of interest, and the output of each sensor is connected to a voltage adder. The signal from the voltage adder is at a maximum when the separation of the magnetic transition data corresponds to the sensor separation. A comparator is connected to the output of the voltage adder, and compares the voltage adder output to a predetermined threshold voltage before indicating that a medium having a particular magnetic transition data pattern is detected. Alternate embodiments contemplate connecting linear circuitry, digital circuitry, fuzzy logic or other electronic circuitry to the array of magnetoresistive sensors. An apparatus according to the present invention is accurate, requires a minimum of parts, is simple and inexpensive to manufacture, and may be employed in a currency validator, magnetic card reader or the like.
REFERENCES:
patent: 4473799 (1984-09-01), Favre
patent: 4487306 (1984-12-01), Nao et al.
patent: 4523330 (1985-06-01), Cain
patent: 4588292 (1986-05-01), Collins
patent: 4628194 (1986-12-01), Dobbins et al.
patent: 4703378 (1987-10-01), Imakoshi et al.
patent: 4749087 (1988-06-01), Buttifant
patent: 4916295 (1990-04-01), Chominski
patent: 4988850 (1991-01-01), Masuda et al.
patent: 5014325 (1991-05-01), Moritomo
patent: 5155643 (1992-10-01), Jones et al.
patent: 5159513 (1992-10-01), Dieny et al.
patent: 5166849 (1992-11-01), Fedeli
patent: 5180903 (1993-01-01), Shigeno et al.
patent: 5216561 (1993-06-01), Jagielinski
Schwarz, "Signal Sampling of Pulse-Biased MR Head", IBM Technical Bulletin, vol. 19, No. 8, Jan., 1977.
Cheatham et al., "Magnetoresistive Head Element", IBM Technical Bulletin, vol. 19, No. 7, Dec., 1976.
Barnes Elwood E.
Kryder Mark H.
Mountfield Keith R.
Bartuska F. J.
Mars Incorporated
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