Electronic timer
US4218871A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 6, 1978 |
| Grant date | Aug 26, 1980 |
| Priority date | — |
| Expiry date | Jul 6, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C1/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electronic timer includes a presettable counter for continuously counting clock pulses and which is controlled to selectively count to a desired time count and to continuously count from that desired time count. A storage device stores, upon actuation, a time count counted by the presettable counter. A detection output is produced when the presettable counter has completed the counting from the desired time count therein to a given time count. An alarm is generated in response to the detection output and is thereafter stopped. In response to the stopping of the alarm, the presettable counter is preset with the time count stored in the storage device. In this way the presettable counter is automatically set to an initial time count to enable repeated use without complication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.