Self-locking electronic lock

An electrically operated lock having a housing and comprising:

• a spring biased bolt and mounting means for mounting said bolt to said housing for movement inward and outward of said housing, said bolt being normally biased outwardly of said housing;
• an electric motor and connecting means between said motor and bolt for moving said bolt inwardly of said housing against its bias by operation of said motor;
• electrical means for selectively operating said motor to move said bolt via said connecting means;
• and
• blocking means for normally blocking inward movement of said bolt after it has moved outward under its bias to impede unauthorized movement of said bolt;
• and
• release means associated with said connecting means and said blocking means to cause said blocking means to release said bolt for authorized inward movement of said bolt when said electrical means selectively operates said motor and connecting means.

A self locking electronic lock system for use with safe doors having a door locking bolt works manipulated between door open and door locked positions by a door mounted handle, said lock system comprising:

• an electronic lock combination entry means for receiving a predetermined lock opening combination and signal generating means for generating an electrical signal when said lock opening combination is entered;
• a lock bolt and means for mounting said lock bolt for movement into and out of a bolt works locking position;
• electric motor means operable by said signal and connecting means between said motor and bolt for moving said bolt on operation of said motor;
• and
• blocking means for normally blocking unauthorized movement of said lock bolt out of said bolt works locking position, said blocking means being operable to allow movement of said lock bolt out of said bolt works locking position only when said electric motor means is operated by said signal and said connecting means is operated to move said bolt.

An electronic door lock for use with a human passage door having a spring biased cam bolt which deflects inwardly of the door on closing of the door relative an associated door jamb and which moves under its spring bias into a bolt receiving receptacle in the jamb when the door is in its closed position, said electronic door lock comprising:

• electrical motor means for withdrawing said cam bolt against its bias inwardly of said door and out of said receptacle on actuation thereof;
• an electronic code entry means on an accessible side of said door for manual entry of a predetermined code;
• and
• circuit board means electrically connected to said code entry means and to said electrical motor means for actuating said motor means to withdraw said cam bolt from said receptacle upon entry of said predetermined code via said code entry means.

An electrically operated spring bolt lock for controlled access door having a fixed handle which is not connected to said bolt, comprising:

• a cam bolt and means for mounting it in said door for movement inwardly and outwardly of said door;
• spring means for normally biasing said bolt outwardly of said door;
• electrically driven means for moving said bolt inwardly of said door against the bias of said spring means for a given time interval to allow opening of said door by said fixed handle and for releasing said bolt after the expiration of said time interval;
• and
• code entry means for actuating said electrically driven means upon entry therein of a predetermined code.

An automatically operated electronically controlled door unlocking and locking system comprising:

• a bolt having a cam end face and means for mounting said bolt for movement inwardly and outwardly of said door with said cam end face opposing an adjacent door jamb as said door is closed;
• spring biasing means for biasing said bolt outwardly of said door, while allowing deflective movement of said bolt inwardly of said door as it is closed relative said jamb, whereby said bolt is receivable in a receptacle in said jamb;
• an electric motor and connecting means between said motor and bolt for moving said bolt inwardly of said door against its bias by operation of said motor to a bolt withdrawn position and for releasing said bolt to a bolt protracted position;
• and
• electrical means, including a code entry means for entry of a predetermined code, for operating said motor to initially withdraw said bolt inwardly of said door on entry of said code to allow opening of said door and automatically, subsequent thereof, to release said bolt.