Camera having an acoustic indicator for generating sounds to indicate the status of certain operating conditions
US4272176A · kind A · utility
15Cited by
7References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1978 |
| Grant date | Jun 9, 1981 |
| Priority date | — |
| Expiry date | Oct 12, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/089
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera includes a circuit which determines the level of a supply voltage and a self-timer delay circuit associated with an electrical shutter. The camera also includes an acoustic indicator which includes a pulse oscillator and a small size acoustic alarm unit and which operates to produce a sound substantially continuously to indicate the level of the supply voltage and to produce a sound intermittently in order to indicate that the self-timer is in operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.