Audible signal valve knob

Details Audible signal valve knob Audible signal valve knob

1977-12-12

1979-01-16

Swisher, S. Clement

Signals and indicators

Alarms

Fluid-pressure variation

116137R, G01L 1912

Patent

active

041343581

ABSTRACT:
A knob for a cooking vessel is a whistle which gives an audible signal that cooking temperature has been reached, and has a valve slide for shutting off the whistle. Supporting inside and outside knob parts incorporate halves of a resonance chamber, which makes the knob extremely simple to mold, assemble, clean, and disassemble. The valve slide rests in guides which make it impossible to assemble incorrectly, and overlaid by a knob cover.

REFERENCES:
patent: 700864 (1902-05-01), Weinberg
patent: 716568 (1902-12-01), Moore
patent: 777538 (1904-12-01), Puckett
patent: 875310 (1907-12-01), Ayer
patent: 957663 (1910-05-01), Emslie
patent: 999567 (1911-08-01), Kallstrom
patent: 3459218 (1969-08-01), Cranage

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