Stronghold combination lock

A combination lock for locking a door comprising:

• a combination dial having a shaft for rotation therewith and adapted for extending through an aperture in said door and for sliding movement in said aperture along said door;
• a locking bolt;
• means coupling said bolt to said dial for sliding movement therewith between a latch and a release position, including a wheel post having a bore through which said shaft extends, said bolt being mounted about said post;
• a lock stand adapted to be fixed to said door and having a fence;
• a plurality of locking wheels engaging said shaft for rotation therewith, each of said wheels having a slot and being positioned so that when said slots are aligned adjacent said fence, said bolt, dial, and locking wheels can be moved by manually applied lateral pressure to said dial from said release to said latch position as said aligned slots move into said fence;
• a first spring extending about said post and attached at opposite ends to said stand for urging said dial, bolt and wheels toward said locking position;
• and
• detent means adapted to be pivotably fixed to said door and releasably engaging said bolt in said release position to retain said bolt in said release position, including a pivot pin, a detent member having an upstanding detent portion for engaging a cut-out portion of said bolt, an aperture through which said pin extends to define a pivot point and a cam surface for engaging a rail on the door jamb when the door is closed to pivot said detent member so that said detent portion moves out of engagement with said cut-out portion and said bolt can move to said latch position under the influence of said first spring, and a second spring disposed about said pin for engaging said detent member to urge rotation of said detent member about said pin in a direction causing said detent portion to engage said cut-out portion.