Patent US3910078A successfully refreshed from Google Patents.
US3910078A
Expired / Lapsed
US
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Push button lock
Assignee: WRIGHT ENTERPRISES OF WISCONSN Inc A CORP OF WI
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Filing: 1974-04-01
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Granted: 1975-10-07
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Expires: 1994-04-01
Abstract
Abstract A novel push button operated combination lock has a series of plungers on either side of a central channel in which the bolt operates. The plungers are notched differently on their respective sides and the combination may be changed by releasing the plungers and reversing them in their channels. The bolt is not releasable unless the correct plungers and only the correct plungers are depressed and there is no means of knowing from the push buttons which plungers or how many plungers must be depressed. The plungers may be reset by pressing the bolt for a new attempt at the right combination or to lock the mechanism. Although the mechanism is readily reset to change the combination when the cover is removed, the cover may only be removed when the bolt is out of the mechanism, securing it against tampering. A variety of forms are shown in which the mechanism is used on a security chain, a padlock, a window lock, and a dead bolt mechanism.
Inventors
- 👤 Donald A Schulz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:39
CPC Classifications
E; E05; E05B; E05B37/00; E05B37/16; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/283; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/417; Y10T70/435; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5164; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/70; Y10T70/7153; Y10T70/7158; Y10T70/7181; Y10T70/7198; Y10T70/7215; Y10T70/722; Y10T70/7322; Y10T70/80; Y10T70/8297; Y10T70/8324
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
386 words
A push button lock comprising a bolt having a series of recesses in a side of the bolt, a lock body having a channel for axial movement of the bolt, channels for tumblers in the lock body crossing the channel for the bolt, a tumbler movable axially in each said channel, each said tumbler having a rest position and an operated position, each tumbler being provided with a projection adapted to fit into a said recess in said bolt in an engaged position of said tumbler and adapted to be free of the recess of said bolt in another position of said tumbler, the engaged position of the projection being such as to prevent axial movement of the bolt, said engagement occurring in one of the rest position of the tumbler or the operated position of the tumbler, but not both, each side of each said tumbler being provided with a said projection, the projection on one side of each said tumbler being positioned so that its engaged position coincides with the rest position of the tumbler and the projection on the other side of the tumbler being positioned so that its engaged position coincides with the operated position of the tumbler, said tumblers being reversible in their channels to predetermine which projection is engageable with said bolt; a sliding cam plate underlying all of the tumbler channels, the sliding cam plate being movable between a first position and a second position, said cam plate being provided with a cam for each tumbler channel, each said cam underlying said channel in the second position and being spaced from the channel in the first position, each cam being shaped to force the tumbler in said tumbler channel to its rest position when the cam underlies the tumbler channel, whereby operation of the slidable cam plate forces all tumblers to their rest position, the slidable cam plate having an extension into the end of the bolt channel to move the cam plate from the first position to the second position by engagement with the end of the bolt as the bolt moves to the extreme end of the bolt channel, whereby insertion of the bolt to the end of the bolt channel automatically resets all tumblers to their rest position and locks the bolt into the bolt channel.
Claim 2
Dependent Claim
386 words
A push button lock comprising a bolt having a series of recesses in a side of the bolt, a lock body having a channel for axial movement of the bolt, channels for tumblers in the lock body crossing the channel for the bolt, a tumbler movable axially in each said channel, each said tumbler having a rest position and an operated position, each tumbler being provided with a projection adapted to fit into a said recess in said bolt in an engaged position of said tumbler and adapted to be free of the recess of said bolt in another position of said tumbler, the engaged position of the projection being such as to prevent axial movement of the bolt, said engagement occurring in one of the rest position of the tumbler or the operated position of the tumbler, but not both, each side of each said tumbler being provided with a said projection, the projection on one side of each said tumbler being positioned so that its engaged position coincides with the rest position of the tumbler and the projection on the other side of the tumbler being positioned so that its engaged position coincides with the operated position of the tumbler, said tumblers being reversible in their channels to predetermine which projection is engageable with said bolt; a sliding cam plate underlying all of the tumbler channels, the sliding cam plate being movable between a first position and a second position, said cam plate being provided with a cam for each tumbler channel, each said cam underlying said channel in the second position and being spaced from the channel in the first position, each cam being shaped to force the tumbler in said tumbler channel to its rest position when the cam underlies the tumbler channel, whereby operation of the slidable cam plate forces all tumblers to their rest position, the slidable cam plate having an extension into the end of the bolt channel to move the cam plate from the first position to the second position by engagement with the end of the bolt as the bolt moves to the extreme end of the bolt channel, whereby insertion of the bolt to the end of the bolt channel automatically resets all tumblers to their rest position and locks the bolt into the bolt channel.
Claim 3
Dependent Claim
59 words
The device of claim 1 in which the sliding cam plate is provided with openings adjacent the cams, said cam plate being slidable to a third position in which the openings are aligned with the tumbler channels, each said tumbler being removable through a said opening for reversal in the tumbler channel to change the combination of the lock.
Claim 4
Dependent Claim
87 words
The device of claim 1 in which the lock is provided with two mating housing members assemblable to form a complete housing, said respective housing members having respective walls in face contact with one another, and aligned openings in said respective walls aligned with the bolt channel for insertion of said bolt whereby to prevent disassembly of said housing members while said bolt is in said channel, said bolt sufficiently long to extend through said housing openings in any position of the bolt within the bolt channel.
Claim 5
Dependent Claim
34 words
The device of claim 1 in which each tumbler is operated by a push button, the push button being spring mounted to return to its normal position independently of the position of the tumbler.
Claim 6
Dependent Claim
23 words
The device of claim 1 in which each tumbler is held in either the rest or the operated position by a friction member.
Claim 7
Dependent Claim
15 words
The device of claim 1, said bolt being attached at one end to a chain.
Claim 8
Dependent Claim
29 words
The device of claim 6, said chain being attached to a slide, said slide being formed to slide on the rail of the anchorage of a door security chain.
Claim 9
Dependent Claim
17 words
The device of claim 6, said chain being secured to a housing for said push button lock.
Claim 10
Dependent Claim
34 words
The device of claim 6, said chain being attached to an anchorage, said anchorage having openings for fasteners to secure said anchorage To a surface selected from an opening frame and an opening closure.
Claim 11
Dependent Claim
20 words
The device of claim 9, said anchorage comprising a pierced base and a loop securing said chain to said base.
Claim 12
Dependent Claim
27 words
The device of claim 1, further comprising a striker for said bolt, and manual means for moving said bolt axially to and from engagement with said striker.
Claim 13
Dependent Claim
36 words
The device of claim 1, said cam plate having side flanges beside said lock body and portions bent from the plane of said side flanges over said lock body to hold the parts in assembled relationship.
Claim 14
Dependent Claim
34 words
The device of claim 1, said lock body having projecting ears touching said housing to position said body, said cam plate having portions engageable with said ears to limit movement of said cam plate.
Claim 15
Dependent Claim
290 words
A push button lock comprising a bolt having a series of recesses in a side of the bolt, a lock body having a channel for axial movement of the bolt, channels for tumblers in the lock body crossing the channel for the bolt, a tumbler movable axially in each said channel, each said tumbler having a rest position and an operated position, each tumbler being provided with a projection adapted to fit into a said recess in said bolt in an engaged position of said tumbler and adapted to be free of the recess of said bolt in another position of said tumbler, the engaged position of the projection being such as to prevent axial movement of the bolt, said engagement occurring in one of the rest position of the tumbler or the operated position of the tumbler, but not both, each side of each said tumbler being provided with a said projection, the projection on one side of each said tumbler being positioned so that its engaged position coincides with the rest position of the tumbler and the projection on the other side of the tumbler being positioned so that its engaged position coincides with the operated position of the tumbler, said tumblers being reversible in their channels to predetermine which projection is engageable with said bolt, each tumbler being held in either the rest or the operated position by a friction member, the friction member comprising a flat plate of spring material over the tumbler channels, and opposed spring leaves struck from the spring material at each tumbler channel, said tumbler extending between said leaves and deflecting said leaves so that said leaves bear on the sides of said tumbler to retain said tumbler in any axial position.
Claim 16
Dependent Claim
290 words
A push button lock comprising a bolt having a series of recesses in a side of the bolt, a lock body having a channel for axial movement of the bolt, channels for tumblers in the lock body crossing the channel for the bolt, a tumbler movable axially in each said channel, each said tumbler having a rest position and an operated position, each tumbler being provided with a projection adapted to fit into a said recess in said bolt in an engaged position of said tumbler and adapted to be free of the recess of said bolt in another position of said tumbler, the engaged position of the projection being such as to prevent axial movement of the bolt, said engagement occurring in one of the rest position of the tumbler or the operated position of the tumbler, but not both, each side of each said tumbler being provided with a said projection, the projection on one side of each said tumbler being positioned so that its engaged position coincides with the rest position of the tumbler and the projection on the other side of the tumbler being positioned so that its engaged position coincides with the operated position of the tumbler, said tumblers being reversible in their channels to predetermine which projection is engageable with said bolt, each tumbler being held in either the rest or the operated position by a friction member, the friction member comprising a flat plate of spring material over the tumbler channels, and opposed spring leaves struck from the spring material at each tumbler channel, said tumbler extending between said leaves and deflecting said leaves so that said leaves bear on the sides of said tumbler to retain said tumbler in any axial position.
Claim 17
Dependent Claim
175 words
The device of claim 14 in which a sliding cam plate underlies all of the tumbler channels, the sliding cam plate being movable between a first position and a second position, said cam plate being provided with a cam for each tumbler channel, each said cam underlying said channel in the second position and being spaced from the channel in the first position, each cam being shaped to force the tumbler in said tumbler channel to its rest position when the cam underlies the tumbler channel, whereby operation of the slidable cam plate forces all tumblers to their rest position, the slidable cam plate having an extension into the end of the bolt channel to move the cam plate from the first position to the second position by engagement with the end of the bolt as the bolt moves to the extreme end of the bolt channel. whereby insertion of the bolt to the end of the bolt channel automatically resets all tumblers to their rest position and locks the bolt into the bolt channel.
Claim 18
Dependent Claim
59 words
The device of claim 15 in which the sliding cam plate is provided with openings adjacent the cams, said cam plate being slidable to a third position in which the openings are aligned with the tumbler channels, each said tumbler being removable through a said opening for reversal in the tumbler channel to change the combination of the lock.
Claim 19
Dependent Claim
88 words
The device of claim 15 in which the lock is provided with two mating housing members assemblable to form a complete housing, said respective housing members having respective walls in face contact with one another, and aligned openings in said respective waLls aligned with the bolt channel for insertion of said bolt whereby to prevent disassembly of said housing members while said bolt is in said channel, said bolt being sufficiently long to extend through said housing openings in any position of the bolt within the bolt channel.
Claim 20
Dependent Claim
36 words
The device of claim 15, said cam plate havng side flanges beside said lock body and portions bent from the plane of said side flanges over said lock body to hold the parts in assembled relationship.
Claim 21
Dependent Claim
34 words
The device of claim 15, said lock body having projecting ears touching said housing to position said body, said cam plate having portions engageable with said ears to limit movement of said cam plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |