Combined whistle and environmental instruments

Details Combined whistle and environmental instruments Combined whistle and environmental instruments

1997-11-10

1999-11-02

Hirshfeld, Andrew

Signals and indicators

Horns, whistles and compressional wave generators

446204, 446404, 362253, 374141, 368 10, 73 2902, G01K 500

Patent

active

059750073

ABSTRACT:
A whistle designed particularly for outdoor use, such as in hiking or camping, wherein opposite sidewalls of the whistle are provided with openings having inwardly directed flanges so that closure devices may be press fitted therein and wherein the closure devices preferably comprise a compass, a thermometer or a molded disk, but can also comprise other environmental instruments.

REFERENCES:
patent: 3085150 (1963-04-01), Bautsch
patent: 3919782 (1975-11-01), Vaucher
patent: 4314316 (1982-02-01), Gertler et al.
patent: 4359961 (1982-11-01), Seron
patent: 4449474 (1984-05-01), Mariol
patent: 5002006 (1991-03-01), Ehrenreich
patent: 5251569 (1993-10-01), Seron
patent: 5450298 (1995-09-01), Fells et al.
patent: 5578992 (1996-11-01), Harding

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