Protective circuit for coin operated vending machines
US4264000A · kind A · utility
5Cited by
4References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 3, 1979 |
| Grant date | Apr 28, 1981 |
| Priority date | — |
| Expiry date | Apr 3, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F1/045
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A coin operated vending machine has a pair of spaced conductors mounted on a coin chute and in position to be bridged by any electrically conductive liquid squirted into the coin slot. Bridging of the conductors by the liquid completes a circuit which disconnects vending circuitry from its power source. The spaced conductors are mounted on a non-conductive support which prevents a coin itself from contacting and bridging the conductors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.