US3680337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety lock
Assignee: Individual
•
Filing: 1971-03-09
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Granted: 1972-08-01
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Expires: 1991-03-09
Abstract
Abstract The lock casing employs a key-operated cylinder having tumblerreceiving passages in line with spring-engaged tumblers in the casing for the cylinder. When unlocking by a key, the latter moves the tumblers into inoperative position, as customary. To prevent ''''picking'''' of the lock, a key-receiving turn button is pivotally held on the casing, and when the turn button-is moved into key-slot exposed position, said movement effects locking of the cylinder. It is only when the turn button abuts the keyopening of the cylinder that the latter can be turned by the key to unlock. Thus when the key-hole of the cylinder is exposed the cylinder is held inoperative.
Inventors
- 👤 Edwin G Krakauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:11
CPC Classifications
E; E05; E05B; E05B17/00; E05B17/14; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915; Y10T70/7932; Y10T70/80; Y10T70/8432; Y10T70/8649
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
In a safety lock comprising a casing having tumbler-receiving passages, a key-operated cylinder having a key-receiving passage and tumbler-receiving passages, tumblers intermediate the casing and cylinder and in register with said receiving passages, of a turN button, means pivotally connecting said turn button to the casing whereby said turn button is adapted to block or expose the key-receiving passage of the cylinder, a cylinder lock member engaged by the turn button and adapted to engage the cylinder for locking the same against rotation when the turn button is pivotally moved from a position in which it blocks insertion of an object into the key-receiving passage of the cylinder, and means for holding the turn button for its rotation.
Claim 2
Dependent Claim
118 words
In a safety lock comprising a casing having tumbler-receiving passages, a key-operated cylinder having a key-receiving passage and tumbler-receiving passages, tumblers intermediate the casing and cylinder and in register with said receiving passages, of a turN button, means pivotally connecting said turn button to the casing whereby said turn button is adapted to block or expose the key-receiving passage of the cylinder, a cylinder lock member engaged by the turn button and adapted to engage the cylinder for locking the same against rotation when the turn button is pivotally moved from a position in which it blocks insertion of an object into the key-receiving passage of the cylinder, and means for holding the turn button for its rotation.
Claim 3
Dependent Claim
59 words
A safety lock constructed in accordance with 1, in which the cylinder is formed with a slot; the cylinder lock member being finger-like and pivotally mounted in such manner as to enter said slot of the cylinder by engagement of the turn button on the raising of the latter from a position blocking the key-receiving aperture of the cylinder.
Claim 4
Dependent Claim
59 words
A safety lock constructed in accordance with 1, in which the cylinder is formed with a slot; the cylinder lock member being finger-like and pivotally mounted in such manner as to enter said slot of the cylinder by engagement of the turn button on the raising of the latter from a position blocking the key-receiving aperture of the cylinder.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |