Current sensing circuit disconnect device and method
First Claim
1. A method for disconnecting a charging device including a transformer, comprising:
- providing a first switch in the primary-side circuit of the primary coil of the transformer; and
opening the first switch when a current sensing device determines a decrease of current flow in the secondary-side circuit of the transformer, andmanually actuating a switching element to permit current flow in the primary-side circuit.
1 Assignment
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Accused Products
Abstract
A device and method are provided for saving power and electricity in a charging device such for external power supplies and battery chargers having a primary circuit and a secondary circuit where a switch is located in the primary circuit and a current sensing device in the secondary circuit to sense when there is a drop in current in the secondary circuit or no current in the secondary circuit because the load or a cell phone is charged and when this occurs the switch in the primary circuit is opened and the primary circuit no longer draws power from the source of power until the switch in the primary circuit is closed by activation of a user of the charging device.
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Citations
20 Claims
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1. A method for disconnecting a charging device including a transformer, comprising:
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providing a first switch in the primary-side circuit of the primary coil of the transformer; and opening the first switch when a current sensing device determines a decrease of current flow in the secondary-side circuit of the transformer, and manually actuating a switching element to permit current flow in the primary-side circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A charging device, comprising:
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a transformer including a primary-side circuit and a secondary-side circuit; the primary-side circuit including a first switch having an open state that opens said primary-side circuit to current flow and a closed state that permits current flow through said primary-side circuit; the secondary-side circuit including a connector for connection to a load for charging an energy storage device in said load; a switching device in said secondary-side circuit for switching the first switch to its open state when the current drawn by said load is below a preset threshold; a manual switch actuable to switch said first switch from an open state to its closed state. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification