Electric alarm clock
US4242748A · kind A · utility
1Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1978 |
| Grant date | Dec 30, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04G13/023
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An alarm clock has a clockwork which drives a 12-hour display and a waking contact which is settable over a 12-hour range. The contact works into a mono-flop or flip-flop to generate a signal in each successive 12-hour cycle at the time set by the contact and this signal is applied to a flip-flop which can energize a signal generator via circuitry ensuring the application of only one signal from the timing flip-flop during each 24-hour period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.