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US 6,026,665 AGranted
Door lock combination chambers
AssigneeIlco Unican Inc.
InventorPaul Raybary
Life of this patent
Estimating the term…
Abstract
The present invention provides new door lock combination chambers for use with door locks, particularly pushbutton door locks. The combination chamber includes rotary keys which are actuated by pressing pushbuttons when entering an unlocking code into the combination chamber. The rotary keys rotate and engage idler gears which are engaged with a timing gear and code gears. The code gears have pockets which become aligned with an unlocking slide when the proper unlocking combination is entered into the combination chamber. The unlocking slide can be slide into the pockets on the code gears, and thus allow a corresponding locking mechanism retract a latch bolt in a door.
Claims22
A lock combination chamber comprising:
- a rotatable timing gear having a plurality of gear sections;
- a plurality of rotary keys mounted on the timing gear and rotatable relative to the timing gear, each one of the rotary keys associated with one of the gear sections of the timing gear;
- an idler gear shaft having a plurality of rotatable idler gears, each one of the idler gears engaged with one of the rotary keys and with one of the gear sections of the timing gear after rotation of the idler gear by contact with one of the rotary keys rotating on the timing gear;
- a code gear shaft having a plurality of rotatable code gears, each one of the code gears engaged with one of the idler gears and defining a pocket;
- and
- an unlocking slide having a plurality of legs inserted into the pockets of the code gears when the pockets are located at a predetermined position by rotation of the code gears and the unlocking slide is actuated.
3 more elements
A pushbutton lock combination chamber comprising:
- a rotatable timing gear having a plurality of gear sections;
- a plurality of rotary keys mounted on the timing gear and rotatable relative to the timing gear, each one of the rotary keys associated with one of the gear sections of the timing gear;
- an idler gear shaft having a plurality of rotatable idler gears, each one of the idler gears engaged with one of the rotary keys and with one of the gear sections of the timing gear after rotation of the idler gear by contact with one of the rotary keys rotating on the timing gear;
- a code gear shaft having a plurality of rotatable code gears, each one of the code gears in engaged with one of the idler gears and defining a pocket;
- a rotatable reset cam connected to the timing gear, the reset cam rotating the timing gear to a starting position after the timing gear is rotated by the idler gears;
- a top end plate and a bottom end plate supporting the timing gear, the idler gear shaft and the code gear shaft;
- a rotary key guide connected to the top and bottom end plates, the rotary key guide having a plurality of key slots in which each one of the rotary keys extends through one of the key slots;
- a plurality of biasing members in which each one of the biasing members is attached to one of the rotary keys such that the rotary key is biased towards a particular rotary key position;
- and
- an unlocking slide having a plurality of legs inserted into the pockets of the code gears when the pockets are located at a predetermined position by rotation of the code gears and the unlocking slide is actuated.
7 more elements
A method of unlocking a lock combination chamber comprising the steps of:
- rotating a plurality of rotary keys mounted on a timing gear and rotatable relative thereto in a predetermined sequence;
- rotating a plurality of idler gears by contacting each idler gear with one of the rotating rotary keys;
- engaging each idler gear with the timing gear and rotating the timing gear by rotating each of the idler gears;
- rotating a plurality of code gears in which each code gear is engaged with one of the idler gears by rotating the idler gears;
- positioning a pocket on each of the code gears at a predetermined location by rotation of the code gears;
- and
- sliding an unlocking slide having a plurality of legs and inserting each of the legs into one of the pockets on the code gears to unlock the combination chamber.
4 more elements
A method of unlocking a lock combination chamber comprising the steps of:
- rotating a plurality of rotary keys mounted on a timing gear in a predetermined sequence;
- rotating a plurality of idler gears by contacting each idler gear with one of the rotating rotary keys;
- engaging each idler gear with the timing gear and rotating the timing gear by rotating each of the idler gears;
- rotating a plurality of code gears in which each code gear is engaged with one of the idler gears by rotating the idler gears;
- positioning a pocket on each of the code gears at a predetermined location by rotation of the code gears;
- and
- sliding an unlocking slide having a plurality of legs and inserting each of the legs into one of the pockets on the code gears to unlock the combination chamber;
- wherein the steps of rotating a plurality of rotary keys and rotating a plurality of idler gears further comprises the steps of:
- removing a fixing leg on each of the rotary keys from an index pocket on each of the idler gears;
- contacting a pushing leg on each of the rotary keys with a key contact area on each of the idler gears;
- and
- rotating each of the idler gears by pushing on each of the idler gears with each of the pushing legs.
9 more elements
Dependencies are inferred from the claim text.