Automatic deadbolt

A door bolt assembly comprising;

• a bolt housing for mounting in a door with a first outer end thereof substantially flush with the edge of the door, said bolt housing having a first portion adjacent said first outer end thereof;
• a bolt slidable within said first portion of said bolt housing between a bolt withdrawn position, through a latch bolt extended position to a deadbolt extended position, said bolt being adapted to cam to the withdrawn position when engaging a striker plate from the bolt extended position;
• a sensing pin within and slidable with respect to said first portion of said bolt housing and said bolt between sensing pin extended and sensing pin retracted positions corresponding to said latch bolt extended and bolt withdrawn positions, respectively, said sensing pin being limited in motion with respect to said bolt so as to be forced to said sensing pin retracted position when said bolt is moved to the bolt withdrawn position, said sensing pin having a cam surface;
• a bolt spring means yieldably encouraging said bolt to the deadbolt extended position;
• a sensing pin spring means yieldably encouraging said sensing pin to the sensing pin extended position;
• a cam member rotatably supported in said bolt housing by cam member support means adjacent a second opposite end of said bolt housing, said cam member, when in a first position preventing said bolt from extending beyond one of said bolt extended and said bolt withdrawn positions, said cam member being rotatable in a first direction to withdraw said bolt to the bolt withdraw position and rotatable in a second direction toward a second position to allow said bolt to move to said deadbolt extended position and to retain the same at said last named position until said cam member is again rotated in said first direction;
• and,
• a bolt retaining member operatively connected to said bolt housing, said retaining member having a first portion adapted to engage said sensing pin cam surface such that said retaining member engages said bolt preventing said bolt from extending beyond the extended position when said sensing pin is in the extended position, said retaining member further having a second portion adapted to engage said sensing pin cam surface such that said retaining member is disengaged from said bolt when said sensing pin is in said retracted position allowing said bolt to extend into the deadbolt position.

A door latch assembly comprising;

• a latch bolt housing for mounting in a door with a first outer end thereof substantially flush with the edge of the door, said latch bolt housing having a first portion adjacent said first outer end thereof;
• a latch bolt slidable within said first portion of said latch bolt housing between a latch bolt withdrawn position, through a latch bolt extended position to a deadbolt extended position;
• a sensing pin within and slidable with respect to said first portion of said latch bolt housing and said latch bolt between a sensing pin extended and sensing pin retracted positions corresponding to said latch bolt extended and withdrawn positions, respectively, said sensing pin being limited in motion with respect to said latch bolt so as to be forced to said sensing pin retracted position when said latch bolt is moved to the latch bolt withdrawn position, said sensing pin having a cam surface;
• a latch bolt spring means yieldably encouraging said latch bolt to the deadbolt extended position;
• a sensing pin spring means yieldably encouraging said sensing pin to the sensing pin extended position;
• a cam member rotatably supported in said latch bolt housing by cam member support means adjacent a second opposite end of said latch bolt housing, said cam member being rotatable in a first direction to withdraw said latch bolt to the latch bolt withdrawn position and rotatable in a second direction toward a second position to allow said latch bolt to move to said deadbolt position and to retain the same at said last named position until said cam member is again rotated in said first direction;
• and,
• a latch bolt retaining member operatively connected to said latch bolt housing, said retaining member having a first portion adapted to engage said sensing pin cam surface such that said retaining member engages said latch bolt preventing said latch bolt from extending beyond the extended position when said sensing pin is in the extended position, said retaining member further having a second portion adapted to engage said sensing pin cam surface such that said retaining member is disengaged from said latch bolt when said sensing pin is in said retracted position allowing said latch bolt to extend into the deadbolt position.

A door bolt assembly comprising;

• a bolt housing for mounting in a door with a first outer end thereof substantially flush with the edge of the door, said bolt housing having a first portion adjacent said first outer end thereof;
• a bolt slidable within said first portion of said bolt housing between a bolt withdrawn position, through a latch bolt extended position to a deadbolt extended position, said bolt being adapted to cam to the withdrawn position when engaging a striker plate from the latch bolt extended position;
• a sensing pin within and slidable with respect to said first portion of said bolt housing and said bolt between sensing pin extended and sensing pin retracted positions corresponding to said latch bolt extended and bolt withdrawn positions, respectively, said sensing pin being limited in motion with respect to said bolt so as to be forced to said sensing pin retracted position when said bolt is moved to the bolt withdrawn position, said sensing pin having a cam surface;
• a bolt spring means yieldably encouraging said bolt to the deadbolt extended position;
• a sensing pin spring means yieldably encouraging said sensing pin to the sensing pin extended position;
• a cam member rotatably supported in said bolt housing by cam member support means adjacent a second opposite end of said bolt housing, said cam member being rotatable in a first direction to withdraw said bolt to the bolt withdrawn position and rotatable in a second direction toward a second position to allow said bolt to move to said deadbolt extended position and to retain the same at said last named position until said cam member is again rotated in said first direction;
• and,
• a bolt retaining member operatively connected to said bolt housing, said retaining member having a first portion adapted to engage said sensing pin cam surface such that said retaining member engages said bolt preventing said bolt from extending beyond the extended position when said sensing pin is in the extended position, said retaining member further having a second portion adapted to engage said sensing pin cam surface such that said retaining member is disengaged from said bolt when said sensing pin is in said retracted position allowing said bolt to extend into the deadbolt position.