Coin receiving apparatus for a vending machine
US4108296A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Mar 22, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D5/02
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin receiving apparatus for a vending machine capable of accurately checking a coin diameter as well as other coin characteristics such as material and a surface pattern for discriminating a true coin from a false one and receiving the former and rejecting the latter. The diameter and other coin characteristics are detected by examining peak values of output waveshapes of coin detectors by means of a window circuit. A single window circuit is provided for each denomination and upper and lower limit values of the window circuit are automatically changed in accordance with a coin characteristic under examination. Frequencies of excitation signals of the various coin detectors are also automatically changed. If a plurality of coins are successively inserted in the coin receiving apparatus without a sufficient time interval, discrimination of the inserted coins is inhibited and the inserted coins are returned.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.