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US 5,515,960 AGranted
Coin sensing apparatus
AssigneeCoin Controls Limited
InventorDennis Wood
Life of this patent
Estimating the term…
Abstract
A coin sensor, such as a post acceptance sensor for a coin validator, at a coin sensing station on a coin path having a sidewall, includes optical source and detector pairs that detect the presence of the coin by reflection of source radiation to the detector by the coin's surface. In order to improve sensitivity the side wall has an angled surface configuration which inhibits reflection of radiation from each source to the detectors in the absence of a coin.
Claims8
A coin handling apparatus including a coin sensing device, the coin sensing device including:
- a coin sensing station;
- a station path for coins, extending though the station, the station path including a side wall;
- an optical source for directing radiation across the station path towards the side wall;
- an optical detector for detecting optical radiation returned thereto from the source by a coin when present at the sensing station;
- the side wall including an angled surface configuration which inhibits light incident thereon from the source from being return to the detector by the side wall in the absence of a coin at the sensing station.
2 more elements
Dependencies are inferred from the claim text.