Low pressure differential detecting whistle

Details Low pressure differential detecting whistle Low pressure differential detecting whistle

1978-11-03

1980-08-05

Goldberg, Gerald

Signals and indicators

Alarms

Fluid-pressure variation

116 58R, 116112, 116137R, 116138, 116DIG19, 116DIG25, B60Q 500, G10K 500

Patent

active

042156467

ABSTRACT:
A whistle audibly responsive to extremely small pressure differentials is described. The whistle has a cylindrical inlet portion, a cylindrical outlet portion and a cylindrical constriction that form a passageway between said inlet and outlet portions. The whistle produces audible sound having an intensity of about 80 DB in response to a pressure differential, across the inlet and outlet portions, that is in the range of about 0.005 to 0.02 psi.

REFERENCES:
patent: 1530899 (1925-03-01), Limon
patent: 1540023 (1925-06-01), Kolliner
patent: 1863456 (1932-06-01), Smith

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