Security lock

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside said housing to lock said door with respect to said jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means and means supporting the dead-locking means for pivoting about a pivot point;
• and
• control means for pivoting the deadlocking means to a locking position for blocking retracting movement of said bolt means when the door is locked and pivoting the deadlocking means to an unlocking position for allowing the bolt means to be retracted within said housing to unlock the door;
• said control means including means for holding said deadlocking means in spaced relation to said bolt means when the bolt means is retracted to its unlocking position so that the deadlocking means will not interfere with sliding extending movement of the bolt means when the bolt means moves from an unlocking to a locking position.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to lock said door with respect to said jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means supported at a pivot point for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door, the deadlocking means including a front blocking portion and a rear blocking portion with said pivot point positioned therebetween, said front and rear blocking portions for jointly blocking retracting movement of said bolt means and said rear blocking portion including means for blocking retracting movement of said bolt means by itself;
• release lever means for controlling the pivotal movement of said deadlocking means;
• operating lever means;
• means for pivotally mounting the operating lever means;
• lost motion means for connecting an end of said operating lever means to said bolt means in a lost motion relation;
• means for slidingly connecting an opposite end of said operating lever means to said release lever means for controlling the movement of the release lever means in response to pivotal movement of the operating lever means;
• and
• means for selectively pivotally moving said operating lever means to control the extension and retraction of said bolt means and the pivotal locking and unlocking movement of said deadlocking means.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to lock said door with respect to said jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means supported for movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means connected to said deadlocking means for moving to one position to hold the deadlocking means in said locking position when the door is locked and for moving to another position to hold the deadlocking means in spaced relation to said bolt means when said door is unlocked;
• operating lever means connected at one end to said bolt means and at an opposite end to said release lever means for moving to control the extension and retraction of said bolt means and the movement of said release lever means;
• lock operation means for selectively applying an actuating force to move said operating lever means for locking and unlocking said door with respect to said jamb;
• and
• operating mode means for determining the position of said bolt means with respect to the housing in the absence of said actuating force.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to lock said door with respect to said jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means supported for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means pivotally supported and connected to said deadlocking means for pivoting the deadlocking means between its locking and unlocking positions;
• holding means for biasing the release lever means to maintain the locking and unlocking positions of said deadlocking means;
• operating lever means pivotally supported and having lost motion means at one end connected to said bolt means for extending said bolt means a predetermined throw length and for retracting the bolt means when said dead-locking means is in its unlocking position;
• said operating lever means including cam means at its opposite end connected to said release lever means for controlling the pivotal movement of the release lever means;
• a solenoid connected to said operating lever means for selectively pivoting the operating lever means;
• means for energizing and de-energizing said solenoid to selectively control the pivotal movement of said operating lever means;
• and
• spring means for biasing said operating lever means to provide a particular positioning of said bolt means when said solenoid is de-energized.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to an operational position for locking said door with respect to said jamb and for retracting within said housing to an operational position for unlocking the door and jamb;
• deadlocking means supported for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means pivotally supported and connected to said deadlocking means for pivoting the deadlocking means between its locking and unlocking positions;
• operating lever means pivotally supported and including means for connecting one end to said bolt means and an opposite end to said release lever means;
• a solenoid connected to said operating lever means and responsive to energization and de-energization for selectively pivoting the operating lever means to extend and retract said bolt means and pivot said release lever means;
• spring means for biasing said operating lever means so that the operating lever means pivots to move the bolt means to a predetermined one of said operational positions when the solenoid is de-energized;
• and
• control means for selectively energizing said solenoid with a predetermined bolt actuation current to move the bolt means to the other of said operational positions against the bias of said spring means and for energizing the solenoid with a holding current less than the bolt actuation current to hold the bolt means at said other operational position against the bias of said spring means.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to lock said door with respect to said jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means supported for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means pivotally supported and connected to said deadlocking means for pivoting the deadlocking means between into its locking and unlocking positions;
• operating lever means pivotally supported and including means for connecting one end to said bolt means and an opposite end to said release lever means, the operating lever means pivoting to extend and retract said bolt means and to selectively pivot said release lever means;
• lock operation means for selectively applying an actuating force to pivot said operating lever means for locking and unlocking the door with respect to the jamb;
• triggerbolt means slidingly supported within said housing and biased for extending outside the housing when the door is open, the triggerbolt means being pressed into said housing when the door is closed;
• said triggerbolt means including a backplate for engaging said deadlocking means and biasing the deadlocking means to its unlocked position when the door is open, the backplate disengaging from said deadlocking means to allow locking movement of the deadlocking means when the door is closed;
• and
• holding means for biasing the release lever means to maintain the locking and unlocking positions of said deadlocking means.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to lock said door with respect to said door jamb and for retracting within said housing to unlock the door and jamb;
• deadlocking means supported for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means pivotally supported and connected to said deadlocking means for pivoting the deadlocking means between its locking and unlocking positions;
• operating lever means pivotally supported and including means for connecting one end to said bolt means and an opposite end to said release lever means;
• a solenoid connected to said operating lever means for selectively pivoting the operating lever means to extend and retract said bolt means and pivot the release lever means;
• and
• means for selectively biasing said operating lever means at one of two positions, biasing at one position causing said bolt means to extend to its locked position when said solenoid is de-energized and biasing at the other position causing said bolt means to retract to its unlocked position when said solenoid is de-energized.

A security lock for locking and unlocking a door with respect to a doorjamb, comprising:

• a housing;
• bolt means slidingly supported within said housing for extending outside the housing to an operational position for locking said door with respect to said jamb and for retracting within said housing to an operational position for unlocking the door and jamb;
• deadlocking means supported for pivotal movement between a locking position for blocking retracting movement of the bolt means to lock the door and an unlocking position for allowing the bolt means to be retracted within the housing to unlock the door;
• release lever means pivotally supported and connected to said deadlocking means for pivoting the deadlocking means between its locking and unlocking positions;
• operating lever means pivotally supported and including means for connecting one end to said bolt means and an opposite end to said release lever means;
• a solenoid connected to said operating lever means and responsive to energization and de-energization for selectively pivoting the operating lever means to extend and retract said bolt means and pivot the release lever means;
• control means for selectively energizing said solenoid at one magnitude of current to move the bolt means to one of said operational positions and for energizing the solenoid at a second reduced magnitude of current to hold the bolt means at said one operational position, said control means including means for de-energizing the solenoid to allow said bolt means to move to the other of said operational positions;
• and
• thermal protector means for operating said control means to energize the solenoid at said reduced magnitude of current for as long as the temperature of the solenoid exceeds a predetermined temperature.

A security lock, comprising:

• a housing;
• bolt means for extending outside said housing to a locking position and for retracting into said housing to an unlocking position;
• a solenoid for controlling the movement of said bolt means between its locking and unlocking positions;
• and
• means for selectively applying electric current to energize and de-energize said solenoid and thereby control the movement of said bolt means;
• said solenoid including a primary coil, a secondary coil and switch means for shunting the secondary coil to allow a predetermined actuation current to flow through the primary coil and provide an actuating force for moving said bolt means to one of said positions, said switch means including means for connecting the primary and secondary coils in series to provide a holding current less than said actuation current for holding the bolt means at said one position.

In a door lock having a housing and a triggerbolt which extends outwardly of the housing when a door is open and which is pressed inwardly into the housing when the door is closed, the improvement comprising:

• a triggerbolt head extending from said housing;
• a shaft slidingly supported within said housing and engaged at one end with said triggerbolt head;
• an end plate threadingly engaged with the opposite end of said shaft;
• means for biasing said triggerbolt head outwardly of the housing;
• and
• stop means within said housing for engaging said end plate to fix the extended position of the triggerbolt head;
• said shaft being rotatable for selectively adjusting the axial position of the end plate on said shaft and thereby selectively adjusting the extension of said triggerbolt head from said housing.