US3862556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door lock attachment
Assignee: MOSES RUBY F
•
Filing: 1973-10-02
•
Granted: 1975-01-28
•
Expires: 1993-10-02
Abstract
Abstract A clamping attachment for a lock bolt thumb knob for preventing the lock from being opened from the outside, consisting of a Ushaped wire bracket which can be snapped onto the door knob hub which acts as an anchor for the attachment. The closed end of the attachment is bent to form a claw for gripping the wings of the thumb knob and preventing the lock from being opened from the outside by a pass key or other device. It can be shifted on the lock to an inoperative position or pulled off entirely leaving the door unmarred.
Inventors
- 👤 Adolph Moses
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:16
CPC Classifications
E; E05; E05B; E05B13/00; E05B13/04; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7915
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
91 words
A snap on and off attachment for optionally restraining rotation of the thumb knob of a lock having a door knob comprising: a bracket having at one end means to optionally embrace the thumb knob consisting of a pair of siamese inverted substantially V-shaped hooks straddling the thumb knob axis to restrain the rotation relative to the bracket; and at the opposite end means for demountably embracing the door knob hub consisting of a pair of spring legs so as to anchoR the bracket against rotation about the thumb knob axis.
Claim 2
Dependent Claim
91 words
A snap on and off attachment for optionally restraining rotation of the thumb knob of a lock having a door knob comprising: a bracket having at one end means to optionally embrace the thumb knob consisting of a pair of siamese inverted substantially V-shaped hooks straddling the thumb knob axis to restrain the rotation relative to the bracket; and at the opposite end means for demountably embracing the door knob hub consisting of a pair of spring legs so as to anchoR the bracket against rotation about the thumb knob axis.
Claim 3
Dependent Claim
20 words
The attachment as recited in claim 1, wherein the hooks can adapt themselves to a range of thumb knob dimensions.
Claim 4
Dependent Claim
61 words
The attachment as recited in claim 1, wherein one or both of said legs has a concave portion located with respect to the hooks so that when the concave portion is aligned with the door knob hub, the hooks are held out of engagement with the thumb knob wings but may be engaged with the wings by pushing the bracket down.
Claim 5
Dependent Claim
40 words
The attachment is recited in claim 3, wherein the upper contact point of said concave portion with the door knob hub is farther from the door than the lower contact point of said concave portion with the door knob hub.
Claim 6
Dependent Claim
69 words
The attachment is recited in claim 1, wherein one or both of said spring legs has a concave or angled portion located so that when the bracket is pushed down to engage the thumb knob wings, said angled portion contacts the door knob hub below its axis, thus urging the hooks to grip the wings and to resist the hooks from being jarred out of engagement with the wings.
Claim 7
Dependent Claim
36 words
The attachment as recited in claim 5, wherein said angled portion is of sufficient length to accommodate the desired range of door knob to thumb knob center distances and the desired range of thumb knob dimensions.
Claim 8
Dependent Claim
32 words
The attachment as recited in claim 1, wherein each of said legs just below the lowest thumb knob gripping tip is bent towards the centerline of the V portions of the hooks.
Claim 9
Dependent Claim
17 words
The attachment as recited in claim 1, wherein each of said leg ends are rounded or hemispherical.
Claim 10
Dependent Claim
22 words
The attachment as recited in claim 1, wherein the end of each of said legs is curled outward to form an eye.
Claim 11
Dependent Claim
20 words
The attachment as recited in claim 1, wherein each of said legs has an end portion which is spread outward.
Claim 12
Dependent Claim
18 words
The attachment as recited in claim 1, wherein said bracket is formed from a single piece of material.
Claim 13
Dependent Claim
24 words
The attachment as recited in claim 5, wherein the legs are coiled or flared outward just below the said angled portion and then terminated.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |