US3731506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Theft-preventive attachment for locks
Assignee: Individual
•
Filing: 1971-05-10
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Granted: 1973-05-08
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Expires: 1991-05-10
Abstract
Abstract A theft-preventive attachment for locks of the rim type which are mounted on sliding doors and movable into engagement with a keeper mounted on the door jamb, both lock and keeper having interfitting bolting fingers or projections. The attachment is in the form of a tube which fits snugly around the projections on the lock body and is carried thereby toward the keeper as the door is slid closed. When the door is closed and the lock bolted, the tube encloses the interfitting bolting projections so that they are not exposed or accessible from the front of the lock and cannot be tampered with. The front wall of the attachment also extends beyond the tube and covers over the mounting bolts of the lock body.
Inventors
- 👤 O Greene
- 👤 R Pelz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:24
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/20; E05B17/2084; E05B63/00; E05B63/12; E05B63/122; Y; Y10; Y10T; Y10T292/00; Y10T292/79; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5173; Y10T70/5177; Y10T70/5181
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
A theft-preventive attachment for use with a rim type lock having a lock body mounted on a sliding door for movement parallel to the plane of the door toward and away from an engaged position with a keeper mounted on the door jamb, said lock body having laterally-projecting bolting fingers which interfit with laterally-projecting fingers on the keeper when the lock body is in said engaged position; said theft-preventive attachment comprising a cover made of heavy-gauge metal and including a tubular portion of rectangular cross Section sized to be inserted upon the bolting fingers of said lock body when the latter is out of its engaged position with said keeper, said tubular portion being of sufficient length that when said lock body is moved to its engaged position with said keeper, the tubular portion is brought to an operative position enclosing said interfitting fingers and the front wall of said tubular portion overlies said interfitting fingers to prevent exposure thereof from the front of the lock, said cover having a pair of side walls, a rear wall and a front wall, said front wall and side walls being substantially longer than said rear wall and defining with the latter the rectangular cross section of said tubular portion.
Claim 2
Dependent Claim
207 words
A theft-preventive attachment for use with a rim type lock having a lock body mounted on a sliding door for movement parallel to the plane of the door toward and away from an engaged position with a keeper mounted on the door jamb, said lock body having laterally-projecting bolting fingers which interfit with laterally-projecting fingers on the keeper when the lock body is in said engaged position; said theft-preventive attachment comprising a cover made of heavy-gauge metal and including a tubular portion of rectangular cross Section sized to be inserted upon the bolting fingers of said lock body when the latter is out of its engaged position with said keeper, said tubular portion being of sufficient length that when said lock body is moved to its engaged position with said keeper, the tubular portion is brought to an operative position enclosing said interfitting fingers and the front wall of said tubular portion overlies said interfitting fingers to prevent exposure thereof from the front of the lock, said cover having a pair of side walls, a rear wall and a front wall, said front wall and side walls being substantially longer than said rear wall and defining with the latter the rectangular cross section of said tubular portion.
Claim 3
Dependent Claim
67 words
A theft-preventive lock attachment according to claim 1 in which said front and side walls have extension portions projecting laterally beyond said tubular portion, said extension portions being sufficiently long that when said tubular portion is in its operative position, the extension portion of the front wall overlies the front surface of the lock body and shields said surface from exposure at the front of the lock.
Claim 4
Dependent Claim
25 words
A theft-preventive lock attachment according to claim 2 in which said tubular portion is sized to fit snugly about the fingers of said lock body.
Claim 5
Dependent Claim
73 words
A theft-preventive lock attachment according to claim 2 in which said rear wall is made of such length that in the operative position of said tubular portion one end edge of the rear wall is proximate to a portion of the lock body and the other end edge of the rear wall is proximate to a portion of said keeper, whereby said tubular portion is restrained from movement out of its operative position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |