US 4,398,711 A · Currency dispenser monitor

Abstract

An apparatus for monitoring the performance of a currency dispenser by detecting the displacement of a roller caused by the thickness of a record member. This displacement is measured by the movement of a graded density translucent member between the photodiode and sensor of a detector. Electronic circuitry associated with the detector indicates the presence of a record member between the rollers, and also the presence of multiple record members. The fabrication of the member allows the circuitry to detect only the displacement from the static position of the rollers, eliminating the necessity for adjustment due to wear, temperature, and other mechanical factors.

Claims30

Dependent claims

An apparatus for detecting the passing of record members in a transport system, said apparatus comprising:

means for gauging the thickness of record members as said members move along a predetermined path;
means for detecting a displacement of said gauging means;
means, coupled to said gauging means, for modulating said detecting means relative to the magnitude of displacement from the static position of said gauging means in a manner which allows for variation of said static position;
and
circuit means responsive to said detecting means for generating a plurality of signals which are utilized to indicate certain conditions when said record members pass through said gauging means, said circuit means including means for inhibiting a voltage representative of the static position of said gauging means and producing a voltage representative of the differential movement of said gauging means.

2 more elements

Dependencies are inferred from the claim text.

Currency dispenser monitor

Life of this patent

Currency dispenser monitor

Life of this patent

Abstract

Claims30