Combination lock

• US 4,885,923 A
• Filed: 02/29/1988
• Issued: 12/12/1989
• Est. Priority Date: 09/02/1987
• Status: Expired due to Fees

• Current Assignee: Clover Co., Ltd.
• Original Assignee: Clover Co., Ltd.
• Inventors: Nakai, Hatsuo
• Primary Examiner(s): Smith, Gary L.
• Assistant Examiner(s): Dino, Suzanne L.
• Application Number:
  US07/161,570
• Time in Patent Office: 652 Days
• Field of Search: 70/284, 70/285, 70/312, 70/314-318
• US Class Current: 70/284
• CPC Class Codes: E05B 37/0031 Locks with both permutation and key actuation E05B17/145 takes precedence
• CPC Class Codes: E05B 37/02 with tumbler discs or rings arranged on a single axis, each disc being adjustable independently of the others
• CPC Class Codes: Y10T 70/7141 Combination and key
• CPC Class Codes: Y10T 70/7305 Manually operable
• CPC Class Codes: Y10T 70/7316 Combination upsetting
• CPC Class Codes: Y10T 70/7328 Compound tumblers

Abstract

A lock applied to an opening-closing part of a locker for rent or the like includes a combination lock in a movable member of a door or the like with a locking mechanism having a cam plate engaging with and disengaging from a catcher of the main body side and a dial lock for defining operation of the locking mechanism disposed in linkage with this locking mechanism. A mechanism is provided such that the lock-releasing numerals in the dial lock can be arbitrarily set by the user.

Claims

1. A combination lock comprising a key-operated locking means and a dial lock means, said dial lock means having indicia, operable means on said dial lock means engageable with said key-operated locking means to provide for controlling the operation of said key-operated locking means, said dial lock means having a setting means providing for arbitrarily selecting a setting of said indicia for releasing said dial lock means, whereby said indicia for releasing said combination lock means can arbitrarily be selected and set by the user of the lock, said dial lock means comprising a housing and a plurality of rotatably mounted dial means in said housing, said housing access means in the form of holes in said housing which are adapted to receive a manually inserted external guide tool so that a user of the lock can insert said guide tool in said holes to determine the set combination to open the dial lock means in cases where the set combination is unknown to the user.

2. A combination lock according to claim 1 wherein said dial means comprises a plurality of bushings mounted on a shaft and a dial member mounted on each of said bushings, each of said bushings having a hole for receiving said guide tool to thereby determine said set combination.

3. A combination lock comprising a key-operated locking means and a dial lock means, said dial lock means having indicia, operable means on said dial lock means engageable with said key-operated locking means to provide for controlling the operation of said key-operated locking means, said dial lock means having a setting means providing for arbitrarily selecting a setting of said indicia for releasing said dial lock means, whereby said indicia for releasing said combination lock means can arbitrarily be selected and set by the user of the lock, said key-operated locking means comprising a housing having a bearing cylinder, said bearing cylinder having a recess, an outer cylinder rotatable in said bearing cylinder, said outer cylinder having a side bar means radially movable between an engaged position in which said side bar means is engaged in said recess and a disengaged position in which said side bar means is disengaged from said recess such that when in said engaged position, relative rotation of said outer cylinder in said bearing cylinder is precluded and when in said disengaged position, relative rotation of said outer cylinder in said bearing cylinder is permitted, an inner cylinder rotatable in said outer cylinder, said inner cylinder having an operating bar means aligned with said side bar means and radially movable to provide for said radial movement of said side bar means between said engaged and disengaged positions, said inner cylinder also having a clutch bar means radially movable into and out of engagement with said outer cylinder to respectively preclude and permit relative rotational movement between said inner and outer cylinders, a plurality of first disc tumblers disposed on said inner cylinder juxtaposed to said operating bar means for effecting operation of said side bar means between said engaged and disengaged positions and a plurality of second disc tumblers disposed in said inner cylinder juxtaposed to said clutch bar means for effecting operation of said clutch bar means into and out of engagement with said outer cylinder.

4. A combination lock according to claim 3, wherein said operating bar means has an outer radial position and an inner radial position, said operating bar means being in said outer radial position when said side bar means is in said engaged position, said operating bar means being in said inner radial position when said side bar means is in said disengaged position, said operating bar means when in said outer radial position permitting relative rotation between said inner and outer cylinders.

5. A combination lock according to claim 3 further comprising biasing means on said inner cylinder biasing said operating bar means in an outwardly radial direction.

6. A combination lock according to claim 3, wherein said inner cylinder has a longitudinal axis, said clutch bar means being axially spaced from said operating bar means.

7. A combination lock according to claim 3, wherein said plurality of first disc tumblers are axially spaced from said plurality of second disc tumblers.

8. A combination lock comprising a key-operated locking means and a dial lock means, said dial lock means having indicia, operable means on said dial lock means engageable with said key-operated locking means to provide for controlling the operation of said key-operated locking means, said dial lock means having a setting means providing for arbitrarily selecting a setting of said indicia for releasing said dial lock means, whereby said indicia for releasing said combination lock means can arbitrarily be selected and set by the user of the lock, said dial lock means comprising an axially movable shaft movable to one axial lock position and another axial unlocked position, said key-operated locking means comprising a housing having a bearing cylinder and an outer cylinder rotatable in said bearing cylinder, said outer cylinder having a recess for receiving said shaft when said shaft is in said axial lock position, said dial locking means comprising first biasing means biasing said shaft in a direction to engage said recess, said dial locking means further comprising bushings mounted on said shaft and dials mounted on said bushings, said dials having said indicia, said bushings being axially movable relative to said dials, and second biasing means biasing said bushings in an axial direction toward said outer cylinder, said shaft having radial projections, and said bushings having grooves for receiving said projections such that when said grooves are axially aligned with said projections, said shaft is axially slidable relative to said bushings.

9. A combination lock comprising a key-operated locking means and a dial lock means, said dial lock means having indicia, operable means on said dial lock means engageable with said key-operated locking means to provide for controlling the operation of said key-operated locking means, said dial lock means having a setting means providing for arbitrarily selecting a setting of said indicia for releasing said dial lock means, whereby said indicia for releasing said combination lock means can arbitrarily be selected and set by the user of the lock, said dial lock means comprising an axially movable shaft movable to one axial locked position and another axial unlocked position, said key-operated locking means comprising a housing having a bearing cylinder and an outer cylinder rotatable in said bearing cylinder, said outer cylinder having a recess for receiving said shaft when said shaft is in said axial locked position, said dial locking means comprising first biasing means biasing said shaft in a direction to engage said recess, said dial locking means further comprising bushings mounted on said shaft and dials mounted on said bushings, said dials having said indicia, said bushings being axially movable relative to said dials, and second biasing means biasing said bushings in an axial direction toward said outer cylinder, said key-operated locking means having an outer cylinder having a lock-release position, said outer cylinder also having a positioning recess and a juxtaposed operating cam, said dial lock means having an end bushing slidably mounted on said shaft, said shaft engaging said positioning recess when said outer cylinder is in said lock-release position, said end bushing engaging said operating cam when said outer cylinder is in said lock-release position.