Power tool theft alarm
First Claim
1. In combination with a plurality of electrical appliances, each enclosing an electrical load adapted to be connected to a power source through a power cord and a plug upon closing of a power switch for operation of the applicance, an anti-theft system for protecting the appliances disconnected from the power source, comprising:
- means for holding the power switches closed, connector means engageable with the plugs for electrically connecting all of the electrical loads and the power switches in series, a power operated alerting device, and sensing means connected to the connector means for activating the alerting device in response to opening of any of the power switches or withdrawal of any of the plugs from engagement with the connector means.
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Accused Products
Abstract
The internal impedance loads of a plurality of electrical appliances on display are directly connected in series through their power switches and power cords by a connector strip to form a detection circuit. Interruption of the detection circuit is sensed by a relay to activate a power operated alerting device. Continuity of the detection circuit is maintained by plugging all of the power cords into the connector strip and holding all of the power switches closed by removable binding tape or the like.
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Citations
10 Claims
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1. In combination with a plurality of electrical appliances, each enclosing an electrical load adapted to be connected to a power source through a power cord and a plug upon closing of a power switch for operation of the applicance, an anti-theft system for protecting the appliances disconnected from the power source, comprising:
- means for holding the power switches closed, connector means engageable with the plugs for electrically connecting all of the electrical loads and the power switches in series, a power operated alerting device, and sensing means connected to the connector means for activating the alerting device in response to opening of any of the power switches or withdrawal of any of the plugs from engagement with the connector means.
- View Dependent Claims (2, 3, 4, 5, 6, 9)
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7. In combination with a plurality of electrical appliances, each having an internal impedance adapted to be connected to a power source through a power cord upon closing of a power switch for operation of the applicance, an anti-theft system for protecting the appliances disconnected from the power source, comprising:
- means for releasably holding the appliance power switches closed, means detachably connected to the power cords for establishing a common series detection circuit through all of the closed power switches and the impedances of the applicances, and means responsive to interruption of said series detection circuit for producing an alarm signal.
- View Dependent Claims (8, 10)
Specification