Emergency whistle

Signals and indicators – Horns – whistles and compressional wave generators

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G10K 500

Patent

active

055468870

ABSTRACT:
An emergency signalling whistle which simultaneously emits high- and low-pitched whistle tones so as to be detectable from relatively long distances and localizable from relatively short distances. A mouthpiece contains first and second air passages which discharge across openings into chambers of different sizes. The whistle also incorporates cylindrically concave grip surfaces which align with the ends of the person's thumb and forefinger in the grip position. In addition, there is an enlarged flange at the end of the mouthpiece which is retained in the person's mouth by the incisor teeth, and a second flange around the mouthpiece which forms a seal against the outer surface of the person's lips.

REFERENCES:
patent: 2454105 (1948-11-01), Thompson
patent: 4709651 (1987-12-01), Lance
patent: 4821670 (1989-04-01), Foxcroft et al.
patent: 5086726 (1992-02-01), Sharp

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Emergency whistle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Emergency whistle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Emergency whistle will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2323261

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.