Patent US3296196A successfully refreshed from Google Patents.
Patent US3596014A successfully refreshed from Google Patents.
US3596014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Burglarproof lock
Assignee: Individual
•
Filing: 1969-04-25
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Granted: 1971-07-27
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Expires: 1989-04-25
Abstract
Abstract A burglarproof Yale-type lock includes a conductive strip positioned in the lock to be contacted by the tumblers when the wrong key is inserted in the lock to complete a circuit to energize an alarm. A second conductive strip may also be positioned in the lock which is normally in contact with the tumblers. A switch which is closed by opening the door or the like is positioned in the circuit between the second strip and the alarm such that if the wrong or no key is inserted in the lock and the door is opened the alarm will be energized, but if the correct key is inserted the alarm will not be energized.
Inventors
- 👤 Uriel Erez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:54
CPC Classifications
E; E05; E05B; E05B45/00; E05B45/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
136 words
A lock of the Yale type having a rotatable cylinder and a plurality of key retractable pin tumblers normally extending from the cylinder and positioned in a lock housing, said lock comprising in combination therewith: an elongated axially extending contact strip mounted in the housing and insulated therefrom, said strip extending below the ends of the pin tuMblers at the side of the tumblers toward the lock-opening direction such that said strip is contacted by the tumblers when the tumblers are rotated in the lock-opening direction but are not retracted by the proper key, and electrical circuit means connecting said contact strip to a signal, said cylinder and the poles of a power source, whereby when said contact strip is contacted by at least one of said pin tumblers the circuit to said signal is completed.
Claim 2
Dependent Claim
136 words
A lock of the Yale type having a rotatable cylinder and a plurality of key retractable pin tumblers normally extending from the cylinder and positioned in a lock housing, said lock comprising in combination therewith: an elongated axially extending contact strip mounted in the housing and insulated therefrom, said strip extending below the ends of the pin tuMblers at the side of the tumblers toward the lock-opening direction such that said strip is contacted by the tumblers when the tumblers are rotated in the lock-opening direction but are not retracted by the proper key, and electrical circuit means connecting said contact strip to a signal, said cylinder and the poles of a power source, whereby when said contact strip is contacted by at least one of said pin tumblers the circuit to said signal is completed.
Claim 3
Dependent Claim
66 words
The lock of claim 1, including a second contact strip mounted adjacent the first-mentioned contact strip and insulated therefrom, said second contact strip touching the ends of the pin tumblers in their normal extended position, said second contact strip being connected to said signal by a switch which is normally open and is closed by opening of the structure which the lock is adapted to lock.
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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |