Check-actuated control mechanisms – Control mechanism actuated by check – other than coin – which... – Having means to read magnetically encoded check
Patent
1990-03-27
1992-06-09
Bartuska, F. J.
Check-actuated control mechanisms
Control mechanism actuated by check, other than coin , which...
Having means to read magnetically encoded check
194317, G07D 508, G07F 700
Patent
active
051199165
ABSTRACT:
An improved magnetic field sensor for detecting tokens is disclosed which has one Hall effect sensor located between a magnet and an inclined token track base and another Hall effect sensor located between another magnet and the inclined token track base. The Hall effect sensors are placed at distances above the inclined token track base which optimize their accuracy in detecting tokens which have two concentric regions with different magnet characteristics.
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patent: 4319674 (1982-03-01), Riggs et al.
patent: 4326621 (1982-04-01), Davies
patent: 4334604 (1982-06-01), Davies
patent: 4460080 (1984-07-01), Howard
patent: 4483431 (1984-11-01), Pratt
patent: 4823928 (1989-04-01), Speas
Carmen Ralph H.
Van Horn John W.
Bartuska F. J.
Duncan Industries Parking Control Corp.
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