US3587080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder mounting plate and alarm actuator
Assignee: 3M Co
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Filing: 1969-06-16
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Granted: 1971-06-22
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Expires: 1989-06-16
Abstract
Abstract The combination of a cylinder lock mounting plate and alarm actuating mechanism whereby attempted removal of the lock cylinder by prying or driving the same out of the door will result in operation of an alarm in response to deformation of the mounting plate caused by the application of a predetermined pressure.
Inventors
- 👤 Paul M Hawkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:37
CPC Classifications
E; E05; E05B; E05B45/00; E05B45/06; E05B45/08; E05B45/12; E05B45/125; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7949
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
In combination, a lock unit comprising a lock cylinder, a first mounting plate to fit over an opening in a building structure and formed with an opening to receive a mounting screw for the lock cylinder, and a second plate positioned generally parallel to said first plate, and spacer means positioned at spaced points between said first plate and said second plate for supporting the plates in a predetermined spaced relationship, said second plate having a screw opening through which extends a mounting screw for supporting said first plate and for engaging said lock cylinder and drawing said cylinder toward said first plate to hold the cylinder on a said building structure, said screw opening in said second plate being positioned between said spacer means defining a moment arm between said screw opening in said second plate and said spacer means when an axially directed force is applied to a said screw causing said second plate to become deformed upon said force exceeding a predetermined value and said predetermined spaced relationship to be changed.
Claim 2
Dependent Claim
174 words
In combination, a lock unit comprising a lock cylinder, a first mounting plate to fit over an opening in a building structure and formed with an opening to receive a mounting screw for the lock cylinder, and a second plate positioned generally parallel to said first plate, and spacer means positioned at spaced points between said first plate and said second plate for supporting the plates in a predetermined spaced relationship, said second plate having a screw opening through which extends a mounting screw for supporting said first plate and for engaging said lock cylinder and drawing said cylinder toward said first plate to hold the cylinder on a said building structure, said screw opening in said second plate being positioned between said spacer means defining a moment arm between said screw opening in said second plate and said spacer means when an axially directed force is applied to a said screw causing said second plate to become deformed upon said force exceeding a predetermined value and said predetermined spaced relationship to be changed.
Claim 3
Dependent Claim
23 words
The combination of claim 1 further comprising signal generating means positioned adjacent said second plate for operation upon deformation of said second plate.
Claim 4
Dependent Claim
26 words
The combination of claim 2 wherein said signal generating means comprises switch means operated by contact with said second plate upon deformation of said second plate.
Claim 5
Dependent Claim
163 words
A mounting structure for mounting a pin-tumbler lock cylinder in a building member, said structure comprising: a first mounting plate to engage a building member on the side opposite the face of a said lock cylinder, said first plate having a generally planar surface and a first opening for receiving a portion of a said lock cylinder and openings for mounting screws, and a second mounting plate having a generally planar surface and opposed end portions, said second plate being formed with openings to correspond with and align with the openings in said first plate and projections which extend from the surface of said plate opposite said planar surface to contact the planar surface of said first mounting plate and space said second plate therefrom, said projections being located along one end of said second plate and intermediate said ends, and said openings for mounting screws in said second plate being positioned between said projection along said one end and intermediate said ends.
Claim 6
Dependent Claim
163 words
A mounting structure for mounting a pin-tumbler lock cylinder in a building member, said structure comprising: a first mounting plate to engage a building member on the side opposite the face of a said lock cylinder, said first plate having a generally planar surface and a first opening for receiving a portion of a said lock cylinder and openings for mounting screws, and a second mounting plate having a generally planar surface and opposed end portions, said second plate being formed with openings to correspond with and align with the openings in said first plate and projections which extend from the surface of said plate opposite said planar surface to contact the planar surface of said first mounting plate and space said second plate therefrom, said projections being located along one end of said second plate and intermediate said ends, and said openings for mounting screws in said second plate being positioned between said projection along said one end and intermediate said ends.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |