US3967846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lock
Assignee: Schlage Lock Co LLC
•
Filing: 1974-04-08
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Granted: 1976-07-06
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Expires: 1994-04-08
Abstract
Abstract A door lock has a frame in which a knob spindle is mounted for rotation about an axis. The spindle can be prevented from rotation on the frame by a bar movable along the axis into and out of a position in which the bar engages both the frame and a slot in the spindle. The bar is moved by a spring and by a manual button mounted in an inside knob on the frame. The spindle can also be prevented from rotation on the frame by a pin radially movable on the frame into and out of a position in which the pin engages both the frame and the spindle slot. The pin is moved by a spring and by an arcuate electromagnet disposed coaxially of the spindle and having a polepiece in position to influence an armature on the pin. The customary key-operated lock is installed in an outer knob fastened onto the spindle.
Inventors
- 👤 Ernest L. Schlage
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:02
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/06; E05B47/0657; E05B47/0665; E05B47/0673; E05B47/0001; E05B47/0002; E05B47/0003; E05B47/0005; Y; Y10; Y10T; Y10T292/00; Y10T292/96; Y10T70/00; Y10T70/50; Y10T70/5611; Y10T70/5757; Y10T70/5765; Y10T70/577; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/713
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
A lock having a frame, a knob spindle mounted on said frame for rotation about an axis, means for preventing said rotation of said spindle including a pin movable on said frame in a direction radial to said axis between a first position holding said spindle against rotation relative to said frame and a second position freeing said spindle from said frame, a spring urging said pin toward one of said positions, an electromagnet substantially arcuate in shape and having a pole positioned to urge said pin against said spring and for urging said pin toward the other of said positions, and means mounting said electromagnet on said frame coaxially around said spindle.
Claim 2
Dependent Claim
113 words
A lock having a frame, a knob spindle mounted on said frame for rotation about an axis, means for preventing said rotation of said spindle including a pin movable on said frame in a direction radial to said axis between a first position holding said spindle against rotation relative to said frame and a second position freeing said spindle from said frame, a spring urging said pin toward one of said positions, an electromagnet substantially arcuate in shape and having a pole positioned to urge said pin against said spring and for urging said pin toward the other of said positions, and means mounting said electromagnet on said frame coaxially around said spindle.
Claim 3
Dependent Claim
26 words
A lock as in claim 1 in which said frame includes a hub coaxially surrounding said spindle and said mounting means surrounds and engages said hub.
Claim 4
Dependent Claim
19 words
A lock as in claim 2 including means for holding said mounting means and said hub against relative rotation.
Claim 5
Dependent Claim
58 words
A lock as in claim 1 including a coaxial hub on said frame and having an axially and radially limited depression therein, an arcuate mounting means of resilient material adapted to surround said hub and having a lug resiliently movable into and out of said depression, and means on said mounting for supporting said pin for radial movement.
Claim 6
Dependent Claim
20 words
A lock as in claim 4 including means on said mounting for supporting said spring in abutment with said pin.
Claim 7
Dependent Claim
85 words
A lock having a frame, a knob spindle mounted on said frame for rotation about an axis, a pin, means on said frame for mounting said pin for radial movement thereon between a first position in engagement with said spindle and holding the same against rotation on said frame and a second position free of said spindle, an armature on said pin, an arcuate electromagnet, means mounting said electromagnet coaxially on said frame, and a pole-piece on said electromagnet in position to influence said armature.
Claim 8
Dependent Claim
85 words
A lock having a frame, a knob spindle mounted on said frame for rotation about an axis, a pin, means on said frame for mounting said pin for radial movement thereon between a first position in engagement with said spindle and holding the same against rotation on said frame and a second position free of said spindle, an armature on said pin, an arcuate electromagnet, means mounting said electromagnet coaxially on said frame, and a pole-piece on said electromagnet in position to influence said armature.
References Cited (Backward Citations)
US2732703A
Cited
US1691528A
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US1956388A
Cited
US2910859A
Cited
US2834194A
Cited
US3456974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |