Patent US3640558A successfully refreshed from Google Patents.
US3640558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary lock for swinging doors
Assignee: Ajax Hardware Manufacturing Corp
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Filing: 1970-10-05
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Granted: 1972-02-08
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Expires: 1990-10-05
Abstract
Abstract A combination bolt type and chain lock having an L-shaped frame with an edge part forming a strike plate and extending flatwise along and secured to a door jamb edge surface with a frame side part extending flatwise longitudinally along a door jamb side surface. A bolt opening is formed longitudinally through the juncture between the frame edge and side parts and the frame side part has longitudinally spaced overlying portions, with spaced protuberances acting as guide means for a sheetlike lock bolt, and is separated by intermediate underlying portions longitudinally slidably mounting the lock bolt movable through the frame bolt opening. The lock bolt is provided with spaced protuberances to act as abutment stops for the full open and locked positions thereof. Additional locking means is provided by the combination of a hasp secured to the overlying portions of said frame with a length of chain links sufficient in length to be looped around a doorknob of the door when in the closed position. With the swinging door in the closed position, the lock bolt may be extended overlapping the door side surface acting as a bolt lock, the strike plate of the lock frame edge part may be engaged by a main lock bolt extending from the door edge and the loop of secured chain positioned around the doorknob as an additional locking feature. Disengagement of the bolt lock allows partial opening of the door to the extent of the chain loop.
Inventors
- 👤 Harry R Gewertz
- 👤 George D Read
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:59
CPC Classifications
E; E05; E05C; E05C17/00; E05C17/02; E05C17/04; E05C17/36; E05C17/365; E05C19/00; E05C19/18; E05C19/182; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/283; Y10T292/34; Y10T292/37; Y10T292/379
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
221 words
In a door lock construction for use in locking a swinging door in closed position with vertical edge surfaces of said door and a door jamb facing and vertical side surfaces at a swinging side of said door and a side of said door jamb generally longitudinally aligned, the combination of: a lock frame generally L-shaped in horizontal cross section having an edge part secured to said vertical edge surface of said door jamb facing said door edge surface and a side part extending generally longitudinally along said door jamb side; a lock bolt; mounting means mounting said lock bolt in a friction reducing manner on said lock frame side part, said lock bolt having an abutment stop and a spaced protuberance on the surface thereof opposed to and coacting with said lock frame to thereby be controllably movable between an extended position generally longitudinally overlapping and adjacent said door-swinging side when said door is in said closed position blocking swinging movement of said door from said closed position and a retracted position, defined by said abutment stop longitudinally displaced from said door-swinging side permitting said door-swinging movement; and a hasp and secured chain loop mounted on said lock frame to provide an auxiliary door lock when said lock bolt is in a retracted position and the door is partially open.
Claim 2
Dependent Claim
221 words
In a door lock construction for use in locking a swinging door in closed position with vertical edge surfaces of said door and a door jamb facing and vertical side surfaces at a swinging side of said door and a side of said door jamb generally longitudinally aligned, the combination of: a lock frame generally L-shaped in horizontal cross section having an edge part secured to said vertical edge surface of said door jamb facing said door edge surface and a side part extending generally longitudinally along said door jamb side; a lock bolt; mounting means mounting said lock bolt in a friction reducing manner on said lock frame side part, said lock bolt having an abutment stop and a spaced protuberance on the surface thereof opposed to and coacting with said lock frame to thereby be controllably movable between an extended position generally longitudinally overlapping and adjacent said door-swinging side when said door is in said closed position blocking swinging movement of said door from said closed position and a retracted position, defined by said abutment stop longitudinally displaced from said door-swinging side permitting said door-swinging movement; and a hasp and secured chain loop mounted on said lock frame to provide an auxiliary door lock when said lock bolt is in a retracted position and the door is partially open.
Claim 3
Dependent Claim
285 words
In a door lock construction for use as an additional door lock in locking a swinging door in closed position with vertical edge surfaces of said door and a door jamb facing and vertical side surfaces at a swinging side of said door and a side of said door jamb generally longitudinally aligned, the combination of: a lock frame generally L-shaped in horizontal cross section having an edge part secured to said vertical edge surface of said door jamb facing said door edge surface and a side part extending generally longitudinally along said door jamb side; a lock bolt; said lock frame edge part of said additional door lock includes a strike plate secured to said vertical edge surface of said door jamb facing said door edge surface having means thereon engageable by a main door bolt extendable from said door edge surface; mounting means mounting said lock bolt in a friction reducing manner on said lock frame side part and comprising a plurality of spaced projections on said lock frame in the area of the mounting of said lock bolt, said lock bolt having an abutment stop and a spaced protuberance coacting with said lock frame to thereby be controllably movable between an extended position generally longitudinally overlapping and adjacent said door swinging side when said door is in said closed position blocking swinging movement of said door from said closed position and a retracted position, defined by said abutment stop longitudinally displaced from said door-swinging side permitting said door-swinging movement; and a hasp and secured chain loop mounted on said lock frame to provide an auxiliary door lock when said lock bolt is in a retracted position and the door is partially open.
Claim 4
Dependent Claim
285 words
In a door lock construction for use as an additional door lock in locking a swinging door in closed position with vertical edge surfaces of said door and a door jamb facing and vertical side surfaces at a swinging side of said door and a side of said door jamb generally longitudinally aligned, the combination of: a lock frame generally L-shaped in horizontal cross section having an edge part secured to said vertical edge surface of said door jamb facing said door edge surface and a side part extending generally longitudinally along said door jamb side; a lock bolt; said lock frame edge part of said additional door lock includes a strike plate secured to said vertical edge surface of said door jamb facing said door edge surface having means thereon engageable by a main door bolt extendable from said door edge surface; mounting means mounting said lock bolt in a friction reducing manner on said lock frame side part and comprising a plurality of spaced projections on said lock frame in the area of the mounting of said lock bolt, said lock bolt having an abutment stop and a spaced protuberance coacting with said lock frame to thereby be controllably movable between an extended position generally longitudinally overlapping and adjacent said door swinging side when said door is in said closed position blocking swinging movement of said door from said closed position and a retracted position, defined by said abutment stop longitudinally displaced from said door-swinging side permitting said door-swinging movement; and a hasp and secured chain loop mounted on said lock frame to provide an auxiliary door lock when said lock bolt is in a retracted position and the door is partially open.
Claim 5
Dependent Claim
38 words
A door lock construction in accordance with claim 2 wherein said plurality of spaced projections are integrally formed with said lock frame and provide point, as opposed to surface contact, between said lock frame and said lock bolt.
Claim 6
Dependent Claim
44 words
A door lock construction in accordance with claim 3 wherein said lock frame comprises portions overlying said lock bolt and spaced discontinuous underlying portions and said plurality of spaced projections are spaced on the interior surface of said overlying portions adjacent said lock bolt.
Claim 7
Dependent Claim
39 words
A door lock constrUction in accordance with claim 4 wherein said protuberance on said lock bolt engages one of said underlying portion for a majority of the travel of said lock bolt from the extracted to the retracted position.
Claim 8
Dependent Claim
29 words
A door lock construction in accordance with claim 5 wherein said protuburence disengages said one of said underlying portion when said lock bolt is in the fully extended position.
Claim 9
Dependent Claim
29 words
A door lock construction in accordance with claim 6 wherein said abutment stop has an abutment shoulder to engage an edge wall of said one of said underlying portions.
Claim 10
Dependent Claim
22 words
A door lock construction in accordance with claim 7 wherein said hasp is secured on said lock frame adjacent said edge part.
Claim 11
Dependent Claim
39 words
A door lock construction in accordance with claim 8 wherein said chain loop is of sufficient size to loop around the doorknob of said door and to allow partial opening of said door with said chain loop engaged thereon.
Claim 12
Dependent Claim
22 words
A door lock construction in accordance with claim 9 wherein said hasp is secured to said overlying portions of said lock frame.
References Cited (Backward Citations)
US1409152A
Cited
US2726112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |