Joan G Mandell

US Patent:

6784775, Aug 31, 2004

Filed:

Feb 28, 2003

Appl. No.:

10/376434

Inventors:

Joan Golden Mandell - West Hills CA
Lee Jay Mandell - West Hills CA
Richard David Mandell - Marina del Rey CA

Assignee:

LJM Associates, Inc. - Canoga Park CA

International Classification:

H01H 900

US Classification:

335206, 34 96, 392385

Abstract:

A safety switch apparatus for disabling the operation of a hand-held 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 users arm. In a first implementation, a sensor is coupled to control circuitry 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 typically contained within a pad placeable on a work surface, within the work surface, or a wearable piece of clothing. In a second implementation, the converse occurs, i. e. , a sensor is used to sense the presence of a user and to disable operation when the user is no longer present.

US Patent:

7002442, Feb 21, 2006

Filed:

Aug 14, 2004

Appl. No.:

10/918312

Inventors:

Joan Golden Mandell - West Hills CA, US
Lee Jay Mandell - West Hills CA, US
Richard David Mandell - Marina del Rey CA, US

Assignee:

LJM Associates, Inc. - Canoga Park CA

International Classification:

H01H 9/00

US Classification:

335206, 34 96, 392385

Abstract:

A safety switch apparatus for disabling the operation of a hand-held 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 a first implementation, a sensor is coupled to control circuitry 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 typically contained within a pad placeable on a work surface, within the work surface, or a wearable piece of clothing. In a second implementation, the converse occurs, i. e. , a sensor is used to sense the presence of a user and to disable operation when the user is no longer present.

US Patent:

20040041684, Mar 4, 2004

Filed:

Aug 29, 2002

Appl. No.:

10/230749

Inventors:

Joan Mandell - West Hills CA, US
Lee Mandell - West Hills CA, US

International Classification:

H01L043/00

US Classification:

338/03200R

Abstract:

A safety switch apparatus 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, e.g., a hall effect sensor, a magnetoresistive sensor, a reed switch, or the like, is coupled to control circuitry 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 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.