Underwater signalling device
US4635242A · kind A · utility
27Cited by
6References
17Claims
0Family size
Inventor
Key dates
| Filing date | Jul 20, 1984 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Jul 20, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S367/91
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A portable, self-contained underwater signalling device adapted to be worn by a diver. A waterproof housing has contained therein an acoustic sound generator, a power source and a three-position switch and circuit board connected in circuit between the power source and sound generator. The three-position switch provides an off or open position, a momentary on position and a full on position. The circuit board may vary the frequency of the signal output of the sound generator when the switch is in the constant on position to generate a pulsed frequency or a constant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.