Skew compensation for a magnetic card reading-writing unit

Details Skew compensation for a magnetic card reading-writing unit Skew compensation for a magnetic card reading-writing unit

1974-12-06

1976-07-27

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

235 6111D, 360 47, G06F 1100, G11B 509, G06F 1304

Patent

active

039720276

ABSTRACT:
In an electronic computer, a magnetic card is recorded along two tracks for storing information. The relative delay between the sequential records on the tracks is controlled by two reference bits simultaneously written on the tracks of the card. During the reading, the first sensed reference bit starts a count which is stopped upon sensing the second reference bit. All data bits following the anticipated bits are transferred to the internal memory only after a delay proportional to the count.

REFERENCES:
patent: 2952008 (1960-09-01), Mitchell
patent: 3495222 (1970-02-01), Perotto
patent: 3636523 (1972-01-01), DeSandre
patent: 3665432 (1972-05-01), Kimura
patent: 3685015 (1972-08-01), Bocek
patent: 3708783 (1973-01-01), Hedin
patent: 3789379 (1974-01-01), Breikss
patent: 3852810 (1974-12-01), McGrath

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