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Title:
PROXIMITY SAFETY SWITCH SUITABLE FOR USE IN A HAIR DRYER FOR DISABLING OPERATION
Document Type and Number:
WIPO Patent Application WO2004019721
Kind Code:
B1
Abstract:
A safety switch apparatus (200) for disabling operation of a hand-carried appliance, e.g., a hair dryer, during periods of nonuse such as when the appliance is put down on a prescribed surface or placed in a non functional position such as being held under a user's arm. In preferred embodiments, a sensor (200), e.g., a hall effect sensor, a magnetoresistive sensor, a reed switch, or the like, is coupled to control circuitry (202) within the appliance to remove power from portions of the device, e.g., its motor and/or heater, when the appliance is proximate to an externally-provided magnetic field preferably provided from a magnetic element (116) typically contained within a pad placeable on a work surface, within the work surface, or a wearable piece of clothing. In a further feature of a preferred embodiment, power is restored when the apparatus is removed from the magnetic field. However after a sustained detection period, operation ceases.

Inventors:
MANDELL JOAN GOLDEN
MANDELL LEE JAY
MANDELL RICHARD DAVID
Application Number:
PCT/US2003/026611
Publication Date:
September 10, 2004
Filing Date:
August 25, 2003
Export Citation:
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Assignee:
LJM ASSOCIATES INC (US)
International Classes:
A45D20/12; A45D20/30; F16P3/14; H03K17/95; H01H36/00; (IPC1-7): H01H9/00
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