G - Physics – 11 – B
Patent
G - Physics
11
B
352/51
G11B 5/80 (2006.01) G06K 1/02 (2006.01) G06K 7/016 (2006.01) G06K 7/08 (2006.01) G06K 13/06 (2006.01) G07F 7/02 (2006.01)
Patent
CA 1157152
1138-13A ABSTRACT OF THE DISCLOSURE An improvement on prior art uses a card having a longi- tudinal strip of magnetic tape encoded with two separate tracks. One track contains a security code and data as to the number of uses remaining on the card. The other track is a control having signals which are read directly proportional to the speed of movement of the card. The card is inserted in a slot in a machine which feeds the card into the machine, reads the data on both tricks, reverses the direction of the card, and impacts the card with a hole to indicate that it has been used one time. The position of impact is controlled by the number of uses of the card prior to the particular use and the control track. While the card is traveling in the reverse direction the first track is re-recorded with the number of remaining uses and security code at a rate determined by the control track, The invention overcomes a problem of prior systems resulting from factors interfering with precise speed of movement of the card, since the control track moves at 8 proportioned speed, the use of oscillators, clocks, phase locked loops and other timing devices is eliminated.
388897
Ridout & Maybee Llp
Service Distributors Inc.
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