Electromechanical door solenoid current surge booster circuit
AssigneeCommand Access Technology, Inc.
InventorMiguel A. 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 mounted on a security door, comprising:
- a transformer that supplies electrical current to a door latch through a transmission wire,
- a mechanical latch bolt actuator that moves a locking bolt that is affixed to a security door, including a capacitor that is electrically connected to a solenoid, the solenoid is mechanically coupled to the locking bolt, and the locking bolt is moved by electrical current supplied to the solenoid by the capacitor, and
- the transformer is located at a distance of more than twenty-five feet away from the capacitor.
An electrical circuit for controlling a powered door latch for mounted on a security door, comprising:
- an electrical circuit controlling a mechanical latch bolt actuator that moves a locking bolt that is affixed to a security door from a closed position to an open position, where the locking bolt is moved by a solenoid that is mechanically coupled to the locking bolt, a capacitor is electrically connected to the solenoid and also to a transformer by a current transmission wire, where the capacitor is adapted to draw electrical current from the transformer and the solenoid is adapted to draw electrical current from the capacitor, and
- the transformer is located at a distance of more than twenty-five feet away from the capacitor.
A method for operating a powered door latch mounted on a security door that is powered by a transformer that supplies electrical current to the door latch through a transmission wire, comprising the steps of:
- providing a door latch that is affixed to a security door having a mechanical latch bolt actuator that moves a locking bolt from a closed position to an open position, where the locking bolt is moved by a solenoid that is mechanically coupled to the locking bolt, a capacitor is electrically connected to the solenoid and also to a transformer by a current transmission wire, wherein the capacitor is adapted to draw electrical current from the transformer and the transformer is located at a distance of more than twenty-five feet away from the capacitor and the solenoid is adapted to draw electrical current from the capacitor;
- supplying electrical current from the transformer to cause the capacitor to charge, and
- causing the solenoid to draw current from the capacitor and thereby move the locking bolt to the open position.
Dependencies are inferred from the claim text.