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US 4,027,508 AGranted
Push-button combination lock
OwnerThomas K. McGourtyinventor
Life of this patent
Estimating the term…
Abstract
A push-button combination lock for doors or the like having buttons which must be pushed in a prescribed combination and prescribed number of times to release the lock. The lock may be reset to a new combination by use of the same pushbuttons when operated in accordance with the newly desired combination. No tools or dismantling of the lock is required to change the combination. A bypass feature enables one to bypass the lock from the inside of the door.
Claims14
A combination lock comprising
- a locking device movable from a first position to a second position,
- a plurality of rotatable locking elements in the path of said device,
- each of said elements having a notch therein for permitting movement of said device to said second position when all said notches are in predetermined positions,
- a plurality of push buttons for corresponding ones of said locking elements,
- setting means operable by each of said push buttons upon actuation thereof for incrementally rotating all of said elements except the said element corresponding to the actuated push button,
- an additional rotatable locking element in the path of said device,
- said additional element having a notch therein for permitting movement of said device to said second position when said last mentioned notch is in a predetermined position, and
- means operable by each of said push buttons upon actuation thereof for invariably incrementally rotating said additional element.
5 more elements
A combination lock comprising
- a locking device including a sensing slide movable from a first position to a second position,
- a plurality of coaxially extending rotatable locking elements in the path of said sensing slide,
- each of said elements having a first gear and having a notch therein for permitting movement of said slide to said second position when all said notches are aligned with said sensing slide,
- a plurality of push buttons for corresponding ones of said locking elements,
- setting means including coaxially extending setting gears in mesh with said first gears,
- means operable by each of said push buttons upon actuation thereof for incrementally rotating all of said setting gears except the said setting gear corresponding to the actuated push button,
- an additional rotatable locking element in the path of said slide,
- said additional element having an additional first gear and having a notch therein for permitting movement of said slide to said second position when said last mentioned notch is aligned with said slide,
- an indexing gear in mesh with said additional first gear,
- means operable by each of said push buttons upon actuation thereof for invariably incrementally rotating said indexing gear, and
- means for selectively demeshing said first gears from said setting and indexing gears.
8 more elements
A combination lock for attachment to a door having a rockable shaft,
- means including a bolt retractable by said shaft upon rocking thereof, and
- a manually operable actuator attached to said shaft on one side of said door,
- comprising
- a locking device connectable to said shaft intermediate said actuator and said door,
- said device being movable from a first position to a second position by rocking said shaft to retract said bolt,
- a plurality of rotatable locking elements in the path of said device,
- each of said elements having a notch therein for permitting movement of said device to said second position when all said notches are in a predetermined position,
- a plurality of push buttons,
- setting means operable by each of said push buttons upon actuation thereof for incrementally rotating all of said locking elements except the said locking element corresponding to the actuator push button,
- an additional rotatable locking element in the path of said device,
- said additional element having a notch therein for permitting movement of said device to said second position when said last mentioned notch is in a predetermined position, and
- means operable by each of said push buttons upon actuation of for invariably incrementally rotating said additional element.
9 more elements
A combination lock comprising
- a plurality of coaxially extending rotatable locking elements,
- a locking device including a sensing slide movable from a first position to a second position radially of said locking elements,
- each of said elements having a first gear and having a notch therein for permitting movement of said slide to said second position when all said notches are aligned with said sensing slide,
- a plurality of push buttons for corresponding ones of said locking elements,
- setting means including coaxially extending setting gears in mesh with said first gears,
- means operable by each of said push buttons upon actuation thereof for incrementally rotating all of said setting gears except the said setting gear corresponding to the actuated push button,
- an additional rotatable locking element coaxial with said first mentioned locking elements,
- said additional element having an additional first gear and having a notch therein for permitting movement of said slide to said second position when said last mentioned notch is aligned with said slide,
- an indexing gear in mesh with said additional first gear,
- means operable by each of said push buttons upon actuation thereof for invariably incrementally rotating said indexing gear, and
- means for selectively demeshing said first gears radially from said setting and indexing gears.
8 more elements
Dependencies are inferred from the claim text.