Coin mechanism having coin level sensor

Details Coin mechanism having coin level sensor Coin mechanism having coin level sensor

G - Physics

07

D

G07D 9/00 (2006.01) G07D 1/00 (2006.01)

Patent

CA 2120773

2120773 9308544 PCTABS00021 A coin mechanism having a coin storage tube (102) and an optical sensor for sensing the level of coins in the tube, the sensor comprising a light source (108) arranged to direct a light beam across the tube, means for returning the beam across the tube and a light detector (112) for detecting the returned beam, characterised in that the means for returning the beam is a concave mirror (114) having a curvature such as to give the beam an area, where it approaches the detector, substantially greater than the effective area of the detector. This enables, in a compact sensor, the light intensity at the detector to be enhanced and at the same time the sensivity to misalignment of components to be reduced.

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