Combination lock with an additional security lock

In a combination lock having a housing, a bolt

• movable relative the housing, a bolt locking mechanism operable between a bolt locking and bolt release condition through entry of a lock opening code by digital input to the locking mechanism, or by entry of a lock opening combination by dial manipulation of the locking mechanism, said locking mechanism including a plurality of tumbler wheels and a bolt release lever having a fence associated with said tumbler wheels, the improvement comprising the provision of:
• an electrically operable solenoid having an armature post normally biased outwardly of a solenoid body;
• mounting means for mounting said solenoid body to said housing with said post positioned normally to block movement of said fence relative said tumbler wheels;
• and
• electrical signal generating means operated by said digital input of a predetermined code for selectively operating said solenoid to retract said post and thereby release said bolt for movement by the associated locking mechanism.

In a combination lock having a housing, a bolt moveable between protracted and retracted positions, a bolt operating mechanism including a lock operable through entry of a predetermined code into said lock to allow retraction movement of said bolt, the improvement comprising the provision of:

• an electrically operable solenoid having an armature post normally biased outwardly of a solenoid body;
• mounting means for mounting said solenoid body to said housing with said post positioned to normally prevent operation of said bolt to its retracted position;
• and
• an electrical signal generator means and associated circuitry operable by entry of each predetermined code for selectively operating said solenoid to retract said post in response to a signal generated by said generator means to allow operation of said bolt to its retracted position by entry of said combination into said lock, wherein:
• said bolt has a recess in a rearward portion thereof;
• and
• said mounting means mounts said solenoid body to position said post normally in engagement with said bolt via said recess.

In a combination lock having a housing, a bolt moveable between protracted and retracted positions, a bolt operating mechanism including a lock operable through entry of a predetermined code into said lock to allow retraction movement of said bolt, the improvement comprising the provision of:

• an electrically operable solenoid having an armature post normally biased outwardly of a solenoid body;
• mounting means for mounting said solenoid body to said housing with said post positioned to normally prevent operation of said bolt to its retracted position;
• and
• an electrical signal generator means and associated circuitry operable by entry of each predetermined code for selectively operating said solenoid to retract said post in response to a signal generated by said generator means to allow operation of said bolt to its retracted position by entry of said combination into said lock, wherein:
• said lock includes a manually operated combination means for opening said lock which includes a plurality of gated tumbler wheels;
• said bolt operating mechanism includes a bolt release lever having a fence receivable in said tumbler wheel gates when the latter are aligned through entry of the predetermined combination;
• and
• said mounting means positions said post normally to block movement of said fence into said gates until said post is retracted against its bias.

In a combination lock having a housing, a bolt moveable relative the housing, a bolt locking mechanism operable between a bolt locking and bolt release condition through entry of a lock opening combination by digital input or dial manipulation of the locking mechanism, said locking mechanism including a plurality of tumbler wheels and a bolt release lever having a fence associated with said tumbler wheels, the improvement comprising the provision of:

• an electrically operable solenoid having an armature post normally biased outwardly of a solenoid body;
• mounting means for mounting said solenoid body to said housing with said post positioned normally to block movement of said fence relative said tumbler wheels;
• electrical signal generating means for selectively operating said solenoid to retract said post and thereby release said bolt for movement by the associated locking mechanism;
• and
• a pivoted plate and means for pivotally mounting said plate within said housing with a first part of said plate normally underlying said fence to prevent said fence from engaging said tumbler wheels, said plate having a second part thereof connected to said armature post whereby said plate first part is pivoted away from said fence when said post is retracted.

In a combination lock having a housing, a bolt moveable between protracted and retracted positions, a bolt operating mechanism including a lock operable through entry of a predetermined combination into said lock to allow retraction movement of said bolt, the improvement comprising the provision of:

• an electrically operable solenoid having an armature post normally biased outwardly of a solenoid body;
• mounting means for mounting said solenoid body to said housing with said post positioned to normally prevent operation of said bolt to its retracted position;
• and
• an electrical signal generator means and associated circuitry for selectively operating said solenoid to retract said post in response to a signal generated by said generator means to allow operation of said bolt to its retracted position by entry of said combination into said lock, wherein:
• said lock includes a plurality of gated tumbler wheels;
• said bolt operating mechanism includes a bolt release lever having a fence receivable in said tumbler wheel gates when the latter are aligned through entry of the predetermined combination;
• said mounting means positions said post normally to block movement of said fence into said gates until said post is retracted against its bias;
• and
• said post is connected to a pivoted plate pivotally mounted within said lock housing, said plate normally engaging said fence to block said movement until said plate is pivoted away from said fence in response to said post being retracted.