Automatic power control module for battery powered devices
First Claim
1. A small thin disc configured and sized for insertion in a battery cavity between a load device and the battery having an automatic shut off timing device whose action is inhibited by a motion detector, the automatic shut off timing device further comprising:
- an electronic switch operable between a conductive and a non-conductive state to selectively connect the battery to the load device;
a timer operable to initiate a timing interval in response to motion sensed by the motion detector; and
a control circuit responsive to signals from the timer to operate the electronic switch to connect the battery to the load device only during the timing interval.
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Abstract
A power control module which can be used to automatically open a power circuit for electrically operated devices, particularly battery operated devices, during predetermined periods of non-use. A timer is reset by a motion detector indicating continuing use. The timer controls a transistor switch which closes and opens the power circuit as required. The timing interval can be user-selected e.g., by programming a microprocessor controller. The transition time between conductive and non-conductive states of the transistor can also be controlled to prolong the life of incandescent bulbs or other sensitive load devices.
51 Citations
3 Claims
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1. A small thin disc configured and sized for insertion in a battery cavity between a load device and the battery having an automatic shut off timing device whose action is inhibited by a motion detector, the automatic shut off timing device further comprising:
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an electronic switch operable between a conductive and a non-conductive state to selectively connect the battery to the load device; a timer operable to initiate a timing interval in response to motion sensed by the motion detector; and a control circuit responsive to signals from the timer to operate the electronic switch to connect the battery to the load device only during the timing interval. - View Dependent Claims (2, 3)
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Specification