| 摘要 |
A construction adapted to receive coins, tokens and other checks for the purchase of articles or services, the construction including means for detecting fraudulent checks. First and second engaging means are provided upon insertion of a check with the spacing of the engaging means being such that proper checks are supported while slugs of lesser diameter and thickness are not held so that subsequent purchasing functions will not take place. A third engaging means spaced a like distance from the first engaging means provides a second means of detecting slugs that vary in diameter and thickness from coins. The check carrier or other mechanism defining some of the engaging surfaces also includes sensing means which detect the presence of a washer and thin slugs to disable the purchasing mechanisms. This detecting arrangement is held out of operating position until after the aforementioned diameter check is accomplished. The combination is particularly useful in a parking meter and may include means for the purchase of free time wherein the check carrier can be used to advance time purchasing means without the presence of a check in the check carrier. |
