US4736970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically controlled door lock
Assignee: Individual
•
Filing: 1987-03-09
•
Granted: 1988-04-12
•
Expires: 2007-03-09
Abstract
Abstract A latch bar is connected to the plunger of a solenoid and is movable endwise to release an exterior knob spindle to enable the spindle to actuate a latch bolt retractor. A latch carried by the latch bar is held by the retractor to maintain the latch bar open until the retractor is later actuated by the spindle, thereby enabling a single electric pulse to effect release of the lock bar.
Inventors
- 👤 Thomas K. McGourty
- 👤 Lawrence R. McGourty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:58
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/06; E05B47/0657; E05B47/0661; E05B47/0001; E05B47/0002; E05B47/0003; E05B47/0004; Y; Y10; Y10T; Y10T292/00; Y10T292/96; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5394; Y10T70/5403; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/713
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
143 words
An electrically controlled door lock comprising a lock frame for mounting in said door, a knob spindle rotatably supported by said frame, a lock bolt retractor supported by said frame, means on said spindle for actuating said retractor upon rotation of said spindle, means for preventing said spindle from rotating including a locking element movable between a spindle locking position and a spindle unlocking position; spring means urging said locking element into said locking position, electromagnetic means for moving said locking element into said unlocking position, a latch carried by said locking element, and said spring means urging said latch into engagement with said retractor whereby to latch said locking element in said unlocking position, said retractor being effective upon actuation by said spindle to release said latch whereby to enable said spring means to move said locking element to said locking position.
Claim 2
Dependent Claim
143 words
An electrically controlled door lock comprising a lock frame for mounting in said door, a knob spindle rotatably supported by said frame, a lock bolt retractor supported by said frame, means on said spindle for actuating said retractor upon rotation of said spindle, means for preventing said spindle from rotating including a locking element movable between a spindle locking position and a spindle unlocking position; spring means urging said locking element into said locking position, electromagnetic means for moving said locking element into said unlocking position, a latch carried by said locking element, and said spring means urging said latch into engagement with said retractor whereby to latch said locking element in said unlocking position, said retractor being effective upon actuation by said spindle to release said latch whereby to enable said spring means to move said locking element to said locking position.
Claim 3
Dependent Claim
40 words
An electrically controlled door lock as defined in claim 1 comprising means supporting said locking element for movement lengthwise of said spindle, and means on said locking element pivotally supporting said latch for movement into latching engagement with said retractor.
Claim 4
Dependent Claim
51 words
An electrically controlled door lock as defined in claim 1 comprising a second knob spindle rotatably supported by said frame, means on said second spindle for actuating said retractor independently of said first mentioned spindle upon rotation of said second spindle, and means on said second spindle supporting said electromagnetic means.
Claim 5
Dependent Claim
135 words
An electrically controlled door lock comprising a rotatable door knob spindle, means for preventing said spindle from rotating including a locking element movable lengthwise of said spindle from a spindle unlocking position to a spindle locking position, spring means urging said locking element into said locking position, electromagnetic means including a plunger movable lengthwise of said spindle; means pivotally connecting said plunger to said locking element whereby energization of said electromagnetic means causes said plunger to move said locking element to said unlocking position, a spring biased latch for latching said locking element in said unlocking position upon movement of said locking element into said unlocking position, and means operable by said spindle upon rotation thereof for releasing said latch whereby to enable said spring means to move said locking element to said locking position.
Claim 6
Dependent Claim
135 words
An electrically controlled door lock comprising a rotatable door knob spindle, means for preventing said spindle from rotating including a locking element movable lengthwise of said spindle from a spindle unlocking position to a spindle locking position, spring means urging said locking element into said locking position, electromagnetic means including a plunger movable lengthwise of said spindle; means pivotally connecting said plunger to said locking element whereby energization of said electromagnetic means causes said plunger to move said locking element to said unlocking position, a spring biased latch for latching said locking element in said unlocking position upon movement of said locking element into said unlocking position, and means operable by said spindle upon rotation thereof for releasing said latch whereby to enable said spring means to move said locking element to said locking position.
Claim 7
Dependent Claim
167 words
An electrically controlled door lock comprising a lock frame for mounting in said door, an exterior door knob spindle rotatably supported by said frame, an interior door knob spindle rotatably supported by said frame, a lock bolt retractor supported by said frame, means on said exterior spindle for actuating said retractor, means on said interior spindle for actuating said retractor independently of said exterior spindle, a locking element for preventing rotation of said exterior spindle, means supporting said locking element for movement lengthwise of said spindles between a spindle locking position and a spindle unlocking position, spring means urging said locking element into said locking position, solenoid means carried by said interior spindle for moving said locking element into said unlocking position, and a latch pivotally supported by said locking element, said spring means urging said latch into latching engagement with said retractor whereby to latch said locking element in said unlocking position, said retractor being effective upon actuation by said exterior spindle to release said latch.
Claim 8
Dependent Claim
167 words
An electrically controlled door lock comprising a lock frame for mounting in said door, an exterior door knob spindle rotatably supported by said frame, an interior door knob spindle rotatably supported by said frame, a lock bolt retractor supported by said frame, means on said exterior spindle for actuating said retractor, means on said interior spindle for actuating said retractor independently of said exterior spindle, a locking element for preventing rotation of said exterior spindle, means supporting said locking element for movement lengthwise of said spindles between a spindle locking position and a spindle unlocking position, spring means urging said locking element into said locking position, solenoid means carried by said interior spindle for moving said locking element into said unlocking position, and a latch pivotally supported by said locking element, said spring means urging said latch into latching engagement with said retractor whereby to latch said locking element in said unlocking position, said retractor being effective upon actuation by said exterior spindle to release said latch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-12 | 1991-10-12 | 1992-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-12 | 1995-10-12 | 1996-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-12 | 1999-10-12 | 2000-04-12 | $7700.00 | Window Closed / Lapsed |