Abstract: A motorized latch retraction assembly for installation within a door latch system is provided. The motorized latch retraction assembly comprising an electromechanical actuator, a gear assembly, and a rack and pinion drive mechanism. The gear assembly includes first and second gears. The first gear is operably coupled to the electromechanical actuator and the second gear. The rack and pinion drive mechanism includes a drive arm and a pinion gear. The drive arm defines a rack member and is configured to be operably coupled to the actuating assembly. The pinion gear includes a pinion shaft operably coupled to the second gear. The pinion gear further includes a rack gear operably coupled to the rack member. The electromechanical actuator operates the gear assembly and the pinion gear to move the drive arm in a linear direction such that the actuation assembly moves the latch between the extended position and the retracted position.

Abstract: A novel and useful solid-state degauss circuit for use with electromagnetic door locks. The door lock circuit is configured to provide a current to the electromagnetic coil load. A pulse width modulation (PWM) controller varies the frequency and/or duty cycle to a switch in series with the coil. An active, solid-state degauss circuit in line with the current flowing through the coil is provided. When triggered either in an uncontrolled or controlled manner, the active degauss circuit composed of a solid-state device, creates a short circuit across the coil after current reversal is achieved thereby degaussing.

Abstract: A door strike assembly includes a strike housing and latch release assembly. The door strike assembly is used in conjunction with a lockset which includes a door latch moveable from a latched condition when a door is closed and an unlatched condition where the door may be opened. The lockset includes a deadlatch to prevent unauthorized movement of the door latch when the door is closed. The latch release assembly is received within the strike housing and includes a latch ejector which engages the deadlatch when the door is closed. A motor is coupled to the latch ejector where actuation of the motor rotates the latch ejector to disengage the latch ejector from the deadlatch. Further rotation of the latch ejector causes the latch ejector to engage the door latch to move the door latch to the unlatched condition such that the door may be opened.

Abstract: An electric strike for use with a door is provided. The strike comprises a housing including first and second walls defining first and second slots, respectively. The second slot defines a plurality of slot teeth. A keeper is disposed within the housing and movable between latched and unlatched positions. The keeper includes a first end having a keeper pin disposed in the first slot, and a second end having a pinion gear disposed in the second slot with pinion teeth configured to engage the slot teeth. A blocking member is pivotably mounted to the housing and includes first and second portions. The second portion of the blocking member is engaged with the keeper pin when the first portion of the blocking member is selectively engaged with a plunger of an actuating mechanism in an engaged position to place the keeper in the latched position.

Abstract: A cabinet lock for securing a door panel to a cabinet housing comprising a latching component, an electromechanical component, and a communications module. The latching component has a latch housing and latch member reciprocally translatable between locked and unlocked orientations to selectively secure the door panel to the cabinet housing. The electromechanical component includes an actuator operably coupled to a drive member that is coupled to the latch member whereby powering of the actuator translates the latch member to at least one of the unlocked or locked orientations. The communications module is configured for communication with a remote device of a municipal traffic control agency and/or a utilities worker. The communications module is configured to receive a control signal from the remote device for moving the latch member to the at least one of the unlocked orientation or the locked orientation.

Abstract: A modular surface mounted electric strike system for use with a door latch assembly to selectively secure a door in a closed position within a door frame is provided. The system includes a base plate configured to be mounted to a surface of the door frame. The base plate includes at least one slot extending along a longitudinal axis of the base plate. An electric strike module has a keeper and a housing to receive a door latch of the door latch assembly. The electric strike module includes a mating feature configured to engage the slot to position the electric strike module along the longitudinal axis of the base plate. The electric strike module is configured to be fixedly positioned to the base plate. The keeper is positioned on the base plate to align with the door latch when the door is in the closed position.

Abstract: A constant-current control circuit comprising a switching circuit including a source voltage, and primary and secondary switches is provided. The primary GaNFET switch is connected with a solenoid assembly coil. The secondary switch is connected with the coil which has an inductance. From t0 to ton, the primary GaNFET switch is closed and the secondary switch is open, the source voltage is applied across the coil, and a counter EMF decays until the voltage across the coil equals the source voltage at ton, thereby allowing current to flow through the coil. From ton to T, the primary GaNFET switch is open and the secondary switch is closed, and a positive EMF equal to the source voltage is applied across the coil until the positive EMF decays to zero at T, such that the current continues to flow through the coil without the source voltage being applied across the coil.

Abstract: A modular surface mounted electric strike system is provided. The system comprises a universal base plate configured to be mounted to a door frame and including first and second mounting points. The system further includes an electric strike module configured to receive the door latch and includes a keeper assembly and an actuator assembly. The actuator assembly is configured for moving between a first mode for preventing the keeper assembly from moving toward an unlatched position and a second mode for permitting the keeper assembly to move toward the unlatched position. When the door latch is in a first position relative to the door frame, the electric strike module is attached to the first mounting point. When the door latch is in a second position relative to the door frame, the electric strike module is attached to the second mounting point of the universal base plate.

Abstract: A locking mechanism associated with a keeper of an electric strike is provided. The mechanism comprises a dual shaft actuator, first and second worm cams coupled to respective shafts, and first and second plungers. A first end portion of first and second resilient members are operably engaged with first and second worm cams, and a second end portion is fixedly coupled with respective first and second plungers. When the actuator rotates the shafts in a first rotational direction, the first and second worm gears move the first and second resilient members toward one another to place the first and the second plungers in a retracted position. When the actuator rotates the first and second shafts in a second rotational direction, the first and second worm gears move the first and second resilient members away from one another to thereby place the first and second plungers in an extended position.

Abstract: A locking mechanism for an electric strike comprises an outer body including first and second openings each including distal edges, and a blocking drum movable between blocking and unblocking positions. The blocking drum includes an outer surface having first and second recesses. First and second blocking members are disposed within the first and second openings, respectively. When the blocking drum is in the blocking position, the first and second blocking members are engaged with the outer surface of the blocking drum, and at least a portion of the first and second blocking members extend outwardly from the respective first and second distal edges to place the electric strike in a locked position. When the blocking drum is in the unblocking position, at least a portion of the first and second blocking members are disposed within the first and second recess, respectively, to place the electric strike in an unlocked position.

Abstract: An electric strike comprising a housing, keeper, actuator module, and actuator. The module comprises a keeper support bracket coupled with the actuator and configured to move between blocking and unblocking positions, and first and second keeper supports extending from opposite ends of the bracket. When the actuator is in a first position, the bracket is in the blocking position so that the first and second keeper supports are coupled to respective first and second ends of the keeper such that a load placed on the keeper when in a locked position is transferred through the keeper supports to a back housing wall. When the actuator is moved to a second position, the bracket is in the unblocking position so that the first and second keeper supports are decoupled with the respective first and second ends of the keeper to allow the keeper to rotate to an unlocked position.

Abstract: An electric strike for use with a sliding door is provided. The strike comprises a housing defining a cavity including first and second walls, each having first and second slots defined therein. A keeper is disposed within the cavity and movable between latched and unlatched positions. The keeper includes first and second ends, wherein each includes respective outwardly extending first and second keeper pins. The first and second keeper pins extending from each end of the keeper are disposed in the respective first and second slots. A blocking member is pivotably mounted to the housing and includes first and second portions. The second portion of the blocking member is engaged with the first keeper pin when the first portion of the blocking member is selectively engaged with a plunger of an actuating mechanism in the first engaged position to selectively maintain the keeper in the latched position.

Abstract: A surface mounted electric strike for selectively retaining a door latch of a door is provided. A strike housing defines a cavity and is mounted to a door frame surface. A keeper is mounted within the housing and rotatable between a latched position and an unlatched position. The keeper includes a keeper stop face that is disposed at an angle relative to a keeper face to limit the rotation of the keeper about the axis of rotation between about 45-60 degrees when the keeper moves between latched and unlatched positions. An actuating assembly is configured for moving between a first mode and a second mode, wherein when the actuating assembly is in the first mode the keeper is prevented from moving toward the unlatched position, and wherein when the actuating assembly is in the second mode the keeper is permitted to move toward the unlatched position.

Abstract: A power control system for use with an electric lock mechanism including an actuator having a coil with a particular coil impedance. The power control system comprises a power supply configured to provide an output voltage having a drive current to the actuator, a credential device powered by the power supply and configured to signal the power supply to provide the output voltage upon receiving an authorized access code, an actuator driver including a multiple-gain current-sensing circuit, and a microcontroller configured to monitor and control the power supply, credential device, actuator driver, and actuator, and determine the impedance of the coil. The microcontroller is populated by a look-up table having performance data for a plurality of coils such that the microcontroller selects a duty ratio to establish the optimum magnitude of drive current to the coil based only on the determined impedance of the coil.

Abstract: An electromechanical component for a locking mechanism is provided. The locking mechanism includes a latching component having a latch member reciprocally movable between a locked orientation and an unlocked orientation. The electromechanical component comprises a drive member configured to be coupled to the latch member, an actuator operably coupled to the drive member, a temperature sensor for sensing an ambient temperature associated with the locking mechanism; and a printed circuit board (PCB) in communication with the temperature sensor and the actuator. When the PCB receives a control signal to move the latch member between the locked orientation and the unlocked orientation, and the temperature sensor senses that the ambient temperature is below a predetermined threshold temperature, the PCB is configured to direct a pulsed current signal to the actuator to move the latch member between the locked orientation and the unlocked orientation.

Abstract: A surface mounted electric strike for selectively retaining a door latch of a door is provided. A strike housing defines a cavity and is mounted to a door frame surface. A keeper is mounted within the housing and rotatable between a latched position and an unlatched position. The keeper includes a keeper stop face that is disposed at an angle relative to a keeper face to limit the rotation of the keeper about the axis of rotation between about 45-60 degrees when the keeper moves between latched and unlatched positions. An actuating assembly is configured for moving between a first mode and a second mode, wherein when the actuating assembly is in the first mode the keeper is prevented from moving toward the unlatched position, and wherein when the actuating assembly is in the second mode the keeper is permitted to move toward the unlatched position.

Abstract: An actuator-controlled strike comprising a housing disposable within a doorframe and including a cavity for a spring latch and a dead latch of a mortise-type lockset. A keeper is pivotably mounted within the chamber to engage the spring latch. A pivotably mounted kicker cooperates with the keeper. A pivotably mounted dead latch release is supported by the keeper when the spring latch is within the strike. The keeper is released by the actuator and rotates into a position to ramp the spring latch out of the strike, also allowing the dead latch release to release the dead latch into the cavity, allowing the spring latch to be ramped out of the strike. Pivoting the keeper causes the kicker to urge the spring latch onto an exit ramp on a face of the keeper. The dead latch release can be installed in a plurality of different locations in the housing.

Abstract: An actuator-controlled electric strike for operating in conjunction with a latch and deadbolt of a lockset. The strike comprises a housing, keeper, and deadbolt bracket. The housing includes a longitudinal length, a back wall extending along the longitudinal length, and side walls defining an entry chamber. The keeper is disposed in the entry chamber about an axis of rotation parallel with the back wall. The keeper is rotatable about the axis of rotation between locked and unlocked positions. The back wall is disposed opposite the keeper when the keeper is in the locked position. The deadbolt bracket is adjustably positioned in the entry chamber along the housing longitudinal length, wherein the deadbolt bracket includes a first wall, a second wall, and a bracket side wall connecting the first wall and the second wall. The deadbolt bracket defines at least a portion of a deadbolt receiving chamber for the deadbolt.

Abstract: An electric strike for use with a sliding door is provided. The strike comprises a housing defining a cavity including first and second walls, each having first and second slots defined therein. A keeper is disposed within the cavity and movable between latched and unlatched positions. The keeper includes first and second ends, wherein each includes respective outwardly extending first and second keeper pins. The first and second keeper pins extending from each end of the keeper are disposed in the respective first and second slots. A blocking member is pivotably mounted to the housing and includes first and second portions. The second portion of the blocking member is engaged with the first keeper pin when the first portion of the blocking member is selectively engaged with a plunger of an actuating mechanism in the first engaged position to selectively maintain the keeper in the latched position.

Abstract: An actuator controlled electric strike for operating in conjunction with a latch of a lockset. The strike comprises a keeper support bracket movable between first and second positions. When the bracket is in the first position a keeper is held in either a locked or unlocked position, and when the bracket is in the second position the keeper is movable to the other position. An actuating mechanism is operatively connected to the bracket and is configured to allow the bracket to move between the first and second positions. First and second biasing mechanisms apply a net force to the bracket. The first biasing mechanism applies a first force to the bracket in the first direction, and the second biasing mechanism applies a second force to the bracket in the second direction. When the bracket is in the first position, the net force of the biasing member is approximately zero.