Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1981-06-26
1983-09-27
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
250205, 340600, G08B 2100
Patent
active
044069960
ABSTRACT:
An optical detection device particularly suitable for use in a bank note counting apparatus is provided. By the use of the optical detection device of this invention, the influence of dust or change in power of the light emitting element due to change in temperature or other factors is excluded to maintain the quantity of light received by the light receiving element at a constant level. The control circuit incorporated in the device of this invention includes a comparator for comparing the quantity of light actually received or sensed by the light receiving element with the pre-set value to generate an output signal instructing to stepwisely lower the power of the light emitting element. In actual operation, the power of the light emitting element is firstly raised to the maximum value and then stepwisely lowered to the same value as that pre-set by the operator. The control circuit further includes a control for controlling the power of the light emitting element to an optimum level in response to the output signal generated from the comparator. The device of this invention may have an alarm signal generator and an alarm signal display device for indicating the occurrence of jamming of any bank note.
REFERENCES:
patent: 3670202 (1972-06-01), Paine et al.
patent: 4260882 (1981-04-01), Barnes
patent: 4268746 (1981-05-01), Schroeder
Laurel Bank Machine Co. Ltd.
Swann III Glen R.
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