| 摘要 |
<p>A machine for detecting the passage of two or more superimposed banknotes comprises: first (101) and second (102) parallel rotatable shafts mounted between fixed side frame members (103, 104); two pairs of resilient plastics rollers (105 to 108) on each rotatable shaft, the rollers mating to form nips for engaging a banknote; a first plate (112) mounted by means of a bearing (115) on the first shaft (101) for conveying the movement of the shaft to the body (113) of a linear variable differential transformer; a second plate (117) similarly mounted on the second shaft (102) for conveying the movement of the second shaft to an armature (118) of the transformer; and a control circuit responsive to a signal from the transformer (114) for determining the relative deflection of the shafts at their mid points due to the passage of a banknote through one group (105, 107) of cooperating pairs of rollers. The control circuit indicates the presence or absence of single or multiple banknotes.</p> |
