| 摘要 |
A counting mechanism for a motor vehicle washing plant. A vertically movable switching member is located in the track in the washing plant and in the path of the vehicle wheel located in the track. The switching member is movable vertically upon engagement by a vehicle wheel and is urged downwardly into engagement with the bottom of the track. After the wheel has passed over the switching member, structure is provided for returning the switching member to its initial position. The second vehicle wheel will then engage the switching member a second time and urge it downwardly into engagement with the bottom of the track. This second engagement will produce an indexing of a stroke counter to register a counting unit thereon. As a result, it will not be possible to control or thwart, in an unauthorized manner, the counting mechanism for counting cars actually washed in the washing plant.
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