Electromechanical door solenoid current surge booster circuit
AssigneeCommand Access Technology, Inc.
InventorMiguel Escobar
Life of this patent
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Abstract
An apparatus, circuit and method for operating a solenoid-actuated electromechanical door latching mechanism that includes a capacitor to meet the power surge requirements needed to move a door latching mechanism. A power supply at one end of a transmission line is coupled with a capacitor adjacent the solenoid at the other end of the transmission line to reduce the need for a larger capacity power, heavy gauge transmission lines and increases the distance at which a power supply may be located from a door latching device.
Claims18
A powered door latch for a door, comprising:
- a mechanical latch bolt actuator assembly affixed to a door that moves a locking bolt, wherein a capacitor is electrically connected to a solenoid, the solenoid having a coil moving a piston, the piston is mechanically coupled to the locking bolt, and the locking bolt is moved by the solenoid piston with electrical current supplied to the coil by that stored in the capacitor.
A power supply circuit for a mechanical latch bolt actuator assembly affixed to a door that moves a locking bolt from a closed position to an open position, where the locking bolt is moved by a solenoid, the solenoid having a coil moving a piston and the piston is mechanically coupled to the locking bolt, comprising:
- a capacitor electrically connected to the solenoid coil and to a power supply by a current transmission wire,
- wherein the capacitor is adapted to draw electrical current from the power supply and the coil is adapted to draw electrical current from the capacitor.
A method for operating a powered door latch for a door, comprising the steps of:
- providing a mechanical latch bolt actuator assembly affixed to a door having a power supply circuit that moves a locking bolt in the assembly from a closed position to an open position, where the locking bolt is moved by a solenoid, the solenoid having a coil moving a piston and the piston is mechanically coupled to the locking bolt, a capacitor is electrically connected to the solenoid coil and to a power supply by a current transmission wire, and wherein the capacitor is adapted to draw electrical current from the power supply and the coil is adapted to draw electrical current from the capacitor;
- supplying electrical current from the power supply to cause the capacitor to charge;
- causing the coil to draw current from the capacitor.
Dependencies are inferred from the claim text.