Token operated television timer
US5125492A · kind A · utility
Inventors
Key dates
| Filing date | Feb 4, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Feb 4, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F15/12
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A device to control the on/off operation of a television set. It is token activated with each of a number of tokens giving a fixed period of time. The device includes a case with a power cord, an electrical receptacle into which the television set power cord is plugged and secured, a token chute with a mechanism for detecting a passing token, and a token drawer with a lock. Inserted tokens are counted and periods of television time credited. Elapsed time is measured, and periods of elapsed time subtracted from credited time. The set is turned off when net credited time, which is displayed, becomes zero. There is a switch to turn off the set while retaining credited time. There is another switch to allow the set to be used without expending credited time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.