Signals and indicators – Alarms – Fluid-pressure variation
Patent
1993-04-26
1994-07-05
Cuchlinski, Jr., William A.
Signals and indicators
Alarms
Fluid-pressure variation
116112, 116DIG25, G08B 2100
Patent
active
053258096
ABSTRACT:
A warning system for a hair dryer to warn the user when the air inlet of the dryer has become clogged with hair or other particles, the dryer including an air filter in the inlet, an air-actuated whistle having an air inlet end and an air outlet end, the whistle being mounted in the air inlet with the air inlet end outside the filter and the air outlet end inside the filter. Air will pass through the whistle when the inlet has become clogged, causing it to blow, and thereby warning the user that the inlet has become clogged. This occurs when the air pressure differential between the two sides of the filter reaches a predetermined level.
REFERENCES:
patent: 2753831 (1956-07-01), Davies
patent: 3699749 (1972-10-01), Nowicki
patent: 4215646 (1980-08-01), Williams
patent: 4254324 (1981-03-01), Vrtaric
patent: 4321070 (1982-03-01), Bede
patent: 4634839 (1987-01-01), Gilbertson
patent: 4896021 (1990-01-01), Poweleit et al.
Conair Corporation
Cuchlinski Jr. William A.
Johnson Haynes N.
Worth W. Morris
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