US3903718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door locking device
Assignee: Unican Security Systems Ltd
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Filing: 1974-04-25
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Granted: 1975-09-09
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Expires: 1994-04-25
Abstract
Abstract A high security door locking device comprising first and second interdependent lock mechanisms. The first is a permutation lock having decoding means, a latch bolt, and a control shaft which is rotatable in one direction from a normal position to effect projecting of the latch bolt and resetting of the mechanism, and which can be rotated in the opposite direction from normal only after operation of the decoding means in accordance with a prescribed schedule. The second lock mechanism has a cylinder which serves to prevent access to the control shaft and also serves as an actuator therefor when released for rotation by a proper key.
Inventors
- 👤 Aaron M Fish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:40
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/14; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5531; Y10T70/70; Y10T70/7141; Y10T70/7153; Y10T70/7181; Y10T70/7198; Y10T70/7215; Y10T70/7226; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7655; Y10T70/7667; Y10T70/7706; Y10T70/7723
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
355 words
In combination with a door having adjacent first and second holes therethrough at a zone near one edge of the door, a permutation lock mounted on the door at said zone and having a latch bolt movable from a projected to a retracted position to free the door for opening, a control shaft which is rotatable in one direction out of a normal position to effect retraction of the bolt, decoding means which must be actuated in accordance with a prescribed schedule in order to free the control shaft for such rotation, and said control shaft being at all times rotatable in the other direction out of its normal position to effect resetting of the combination: A. said permutation lock having a rear housing section containing the mechanism thereof and which overlies the inner face of the door at said zone to conceal said holes in the door; B. a front plate secured to the door at the outer face thereof and having first and second holes therein which register with the respective first and second holes in the door; C. said permutation lock having another housing section which projects forwardly from said rear housing section and through said first holes to have a front portion thereof accessible at the outer side of said front plate; D. actuating means for said decoding means mounted on the front portion of said other housing section so as to be accessible from the outer face of the door; E. said control shaft being operatively connected with the mechanism in said rear housing section and projecting forwardly therefrom part way into said second hole in the door; F. a key operable cylinder lock mechanism secured to the front plate in said second hole thereof for actuation of its cylinder by a suitable key from the outer side of the door, said cylinder lock mechanism projecting into said second hole in the door so as to conceal the control shaft, and the cylinder thereof having a portion adjacent to said control shaft; G. and means providing a rotation transmitting connection between said adjacent portions of the cylinder and control shaft.
Claim 2
Dependent Claim
355 words
In combination with a door having adjacent first and second holes therethrough at a zone near one edge of the door, a permutation lock mounted on the door at said zone and having a latch bolt movable from a projected to a retracted position to free the door for opening, a control shaft which is rotatable in one direction out of a normal position to effect retraction of the bolt, decoding means which must be actuated in accordance with a prescribed schedule in order to free the control shaft for such rotation, and said control shaft being at all times rotatable in the other direction out of its normal position to effect resetting of the combination: A. said permutation lock having a rear housing section containing the mechanism thereof and which overlies the inner face of the door at said zone to conceal said holes in the door; B. a front plate secured to the door at the outer face thereof and having first and second holes therein which register with the respective first and second holes in the door; C. said permutation lock having another housing section which projects forwardly from said rear housing section and through said first holes to have a front portion thereof accessible at the outer side of said front plate; D. actuating means for said decoding means mounted on the front portion of said other housing section so as to be accessible from the outer face of the door; E. said control shaft being operatively connected with the mechanism in said rear housing section and projecting forwardly therefrom part way into said second hole in the door; F. a key operable cylinder lock mechanism secured to the front plate in said second hole thereof for actuation of its cylinder by a suitable key from the outer side of the door, said cylinder lock mechanism projecting into said second hole in the door so as to conceal the control shaft, and the cylinder thereof having a portion adjacent to said control shaft; G. and means providing a rotation transmitting connection between said adjacent portions of the cylinder and control shaft.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |