Electronic whistle device

Details Electronic whistle device Electronic whistle device

1997-09-30

1998-12-08

Mullen, Jr., Thomas J.

Communications: electrical

Condition responsive indicating system

Specific condition

3403843, 340693, G08B 1300

Patent

active

058476520

ABSTRACT:
An electronic whistle device (10) comprising a casing (12). A whistle producing circuit (14) is carried within the casing (12). A manually operated switch (16) is remote from the casing (12). An assembly (18) is for electrically connecting the manually operated switch (16) to the whistle producing circuit (14) within the casing (12). When the manually operated switch (16) is closed, the whistle producing circuit (14) will be activated to make a whistle sound (20).

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patent: 4041394 (1977-08-01), Pate
patent: 4587516 (1986-05-01), Hiraki
patent: 4665389 (1987-05-01), Clendening
patent: 4739990 (1988-04-01), Aguirre et al.
patent: 5005002 (1991-04-01), Halperin
patent: 5079679 (1992-01-01), Chin-Fa
patent: 5629679 (1997-05-01), Cranford et al.

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