Electronic chime
US4001816A · kind A · utility
13Cited by
1References
10Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 19, 1976 |
| Grant date | Jan 4, 1977 |
| Priority date | — |
| Expiry date | Jan 19, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10H1/30
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An electronic chime wherein at least two different audible frequency signals forming chime sound are generated by a frequency divider oscillated by an oscillating circuit capable of adjusting its output standard frequency clock pulse. These audible frequency signals are respectively amplitude modulated so as to be attenuated stepwise, and the chime sound is generated by such modulated signals and caused to disappear at attenuated state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.