Trigger and latch bolt assembly

A lock mechanism including a casing structure adapted to be mounted to one of a door and a door frame for cooperation with an apertured strike plate mounted to the other of said door and door frame, said lock mechanism further comprising;

• at least one aperture in said casing structure;
• a latch bolt retractably mounted with respect to said casing structure and biased to an extended, first position wherein a latching portion thereof extends from said casing aperture for engagement with said strike plate aperture, and movable to a second retracted position;
• said latching portion of said latch bolt having a beveled leading surface located for engagement with said strike plate only when said latch bolt is moved a predetermined amount toward said retracted position;
• and latch bolt-retracting means located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved toward a closed position and operatively coupled with said latch bolt for effecting said predetermined amount of movement toward said retracted position;
• wherein said latch bolt retracting means comprises a biased trigger bolt mounted to said casing structure and located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved toward a closed position, said trigger bolt being biased to an extended position from a second aperture in said casing and movable to a retracted position;
• means for releasably coupling said trigger bolt with said latch bolt for effecting said predetermined amount of movement of said latch bolt toward said retracted position in response to a predetermined amount of movement of said trigger bolt toward said retracted position thereof, so as to bring said beveled surface of said latch bolt into position for engagement with said strike plate;
• and further including a deadlock member pivotally mounted to said casing for movement between a blocking position wherein said deadlock member will prevent retraction of the latch bolt and a non-blocking position wherein said latch bolt is free to move to a retracted position;
• and cooperating means on said deadlock member and said trigger bolt for moving the deadlock member to the non-blocking position when the trigger bolt is in its extended position.

A lock mechanism including a casing structure adapted to be mounted to one of a door and a door frame for cooperation with an apertured strike plate mounted to the other of said door and door frame, said lock mechanism further comprising;

• at least one aperture in said casing structure;
• a latch bolt retractably mounted with respect to said casing structure and biased to an extended, first position wherein a latching portion thereof extends from said casing aperture for engagement with said strike plate aperture, and movable to a second retracted position;
• said latching portion of said latch bolt having a beveled leading surface located for engagement with said strike plate only when said latch bolt is moved a predetermined amount toward said retracted position;
• and latch bolt-retracting means located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved toward a closed position and operatively coupled with said latch bolt for effecting said predetermined amount of movement toward said retracted position;
• wherein said retracting means comprises a biased trigger bolt mounted to said casing structure and located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved toward a closed position, said trigger bolt being biased to an extended position from a second aperture in said casing and movable to a retracted position;
• means for releasably coupling said trigger bolt with said latch bolt for effecting said predetermined amount of movement of said latch bolt toward said retracted position in response to a predetermined amount of movement of said trigger bolt toward said retracted position thereof, so as to bring said beveled surface of said latch bolt into position for engagement with said strike plate;
• and further including release means for disengaging said releasably coupling means from said latch bolt following said movement thereof and of said trigger bolt respectively said predetermined amount toward said retracted positions thereof.

A lock mechanism including a casing structure adapted to be mounted to one of a door and a door frame for cooperation with an apertured strike plate mounted to the other of said door and door frame, said lock mechanism further comprising;

• at least one aperture in said casing structure;
• a latch bolt retractably mounted with respect to said casing structure and biased to an extended, first position wherein a latching portion thereof extends from said casing aperture for engagement with said strike plate aperture, and movable to a second, fully retracted position to permit opening and closing of the door;
• said latching portion of said latch bolt having a beveled leading surface located for engagement with said strike plate only when said latch bolt is moved a predetermined amount toward said retracted position;
• and latch bolt-retracting means located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved an initial amount from its open position toward a closed position;
• and means operatively coupling said retracting means with said latch bolt for effecting said predetermined amount of movement toward said retracted position to thereby retract said latch bolt sufficiently to position the beveled surface thereof for engagement with the strike plate to permit full retraction of said latch bolt by the strike plate upon further movement of the door toward its closed position;
• wherein said retracting means comprises a biased trigger bolt mounted to said casing structure and located for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved toward a closed position, said trigger bolt being biased to an extended position from a second aperture in said casing and movable to a retracted position;
• means for releasably coupling said trigger bolt with said latch bolt for effecting said predetermined amount of movement of said latch bolt toward said retracted position in response to a predetermined amount of movement of said trigger bolt toward said retracted position thereof, so as to bring said beveled surface of said latch bolt into position for engagement with said strike plate.

A lock mechanism including a casing structure adapted to be mounted to one of a door and a door frame for cooperation with an apertured strike plate mounted to the other of said door and door frame, said lock mechanism further comprising;

• at least one aperture in said casing structure a latch bolt retractably mounted with respect to said casing structure and biased to an extended, first position wherein a latching portion thereof extends from a first casing aperture for engagement with said strike plate aperture, and movable to a second, fully retracted position to permit opening and closing of the door;
• said latching portion of said latch bolt having a beveled leading surface located for engagement with said strike plate only when said latch bolt is moved a predetermined amount toward said retracted position;
• and trigger bolt means located extending from a second casing aperture for engagement with said strike plate prior to engagement thereof by said latch bolt when said door is moved an initial amount from its open position toward a closed position;
• and means operatively coupling said trigger bolt means with said latch bolt for effecting said predetermined amount of movement toward said retracted position to thereby retract said latch bolt sufficiently to position the beveled surface thereof for engagement with the strike plate to permit full retraction of said latch bolt by the strike plate upon further movement of the door toward its closed position.