Patent US3769822A successfully refreshed from Google Patents.
US3769822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door lock
Assignee: General Lock Co
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Filing: 1972-06-12
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Granted: 1973-11-06
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Expires: 1992-06-12
Abstract
Abstract In a door lock which has a casing, a face plate, a lock cylinder with rotatable cam, a spring-biased retractible latch bolt, and inner and outer manually rotatable hubs with the inner hub in operative engagement with said latch bolt for retracting the same, the improvement which includes a clutch pivoted upon the latch bolt and normally spring-biased to a position disengaged from the outer hub. An upper transmission bar is pivotally mounted within the casing adapted for operative engagement with a lower transmission bar pivoted within the casing with the latter in operative engagement with the clutch. The upper transmission bar is normally positioned in the path of rotation of the cylinder cam so that when engaged thereby acting through the lower transmission bar and the clutch is adapted to retract the latch bolt, and is also adapted to rotate the clutch for operative engagement by the outer hub.
Inventors
- 👤 L Yulkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:00
CPC Classifications
E; E05; E05B; E05B59/00; E05B55/00; E05B55/12; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5226; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5394; Y10T70/5465; Y10T70/5478; Y10T70/5496; Y10T70/55; Y10T70/5513
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
171 words
In a door lock having a casing, an apertured face plate, a lock cylinder with rotatable cam, a spring-biased retractible latch bolt guidably mounted on said casing and face plate, and opposed inner and outer manually rotatable spring-biased hubs journalled within and upon said casing, the inner hub being in operative engagement with said latch bolt; the improvement comprising: an S-shaped clutch within said casing pivotally mounted intermediate its ends upon said latch bolt; a spring anchored in the casing normally biasing said clutch counter-clockwise to a position disengaged from said outer hub; a lower transmission bar at its upper end pivoted within said casing with its lower end in operative engagement with said clutch; and an upper transmission bar at its lower end pivoted within said casing operatively engaging the lower transmission bar, with its upper end normally positioned in the path of rotation of said cam and when operatively engaged thereby, pivotally rotating the lower transmission bar, in turn, operatively engaging said clutch, adapted to retract said latch bolt.
Claim 2
Dependent Claim
171 words
In a door lock having a casing, an apertured face plate, a lock cylinder with rotatable cam, a spring-biased retractible latch bolt guidably mounted on said casing and face plate, and opposed inner and outer manually rotatable spring-biased hubs journalled within and upon said casing, the inner hub being in operative engagement with said latch bolt; the improvement comprising: an S-shaped clutch within said casing pivotally mounted intermediate its ends upon said latch bolt; a spring anchored in the casing normally biasing said clutch counter-clockwise to a position disengaged from said outer hub; a lower transmission bar at its upper end pivoted within said casing with its lower end in operative engagement with said clutch; and an upper transmission bar at its lower end pivoted within said casing operatively engaging the lower transmission bar, with its upper end normally positioned in the path of rotation of said cam and when operatively engaged thereby, pivotally rotating the lower transmission bar, in turn, operatively engaging said clutch, adapted to retract said latch bolt.
Claim 3
Dependent Claim
37 words
In the door lock of claim 1, said clutch adapted to be thus rotated clockwise into operative reactive engagement with said outer hub, so that rotation of the outer hub is effective to retract said latch bolt.
Claim 4
Dependent Claim
62 words
In the door lock of claim 1, a lock button pivoted upon and within said casing having a manually operable front face within said face plate, and an inwardly extending clutch support plate in ''''unlocked position'''' supportably holding said clutch in a clockwise rotated position so that said outer hub is adapted to operatively engage said clutch to retract said latch bolt.
Claim 5
Dependent Claim
24 words
In the lock of claim 3, said lock button being manually pivoted to a ''''locked position'''' with its support plate disengaged from said clutch.
Claim 6
Dependent Claim
22 words
In the lock of claim 4, ball detent means on said lock button registerable with said casing in ''''unlock'''' and ''''lock'''' positions.
Claim 7
Dependent Claim
68 words
In the door lock of claim 1, said clutch adapted to be rotated clockwise; a horizontally disposed locking lever pivotally mounted on said casing and normally spring-biased to a position blocking retraction of said latch bolt when the door is closed; a lateral pin on said locking lever; said clutch on such clockwise rotation adapted to operatively engage said pin lifting said locking lever to a non-blocking position.
Claim 8
Dependent Claim
79 words
In the door lock of claim 6, a horizontally disposed stop button guidably mounted on said casing and normally biased outwardly of said face plate and adapted for retraction on closing of the door; cam on and depending from said stop button adapted on opening of the door and forward movement of said stop button to operatively engage said locking lever pin lifting said locking lever to a non-blocking position, said stop button when retracted disengaging said locking lever.
Claim 9
Dependent Claim
62 words
In the door lock of claim 6, a thumb-turn hub journalled upon said casing and adapted for manual rotation from the door inside, and a pin on said hub adapted on rotation thereof to engage and rotate said clutch clockwise into engagement with the outer hub and also so that one end thereof operatively engages said locking pin, lifting said locking lever.
Claim 10
Dependent Claim
85 words
In the door lock of claim 1, a dead bolt slidably mounted on and nested in said casing and adapted for projection through said face plate and including a hub having a cam slot therethrough; a thumb-turn hub journalled upon said casing adapted for manual rotation from the door inside; a cam pin on said thumb-turn hub operatively nested in said cam slot whereby rotation of the thumb-turn hub in one direction advances said dead bolt, and in the other direction retracts said dead bolt.
Claim 11
Dependent Claim
105 words
In the door lock of claim 9, said upper transmission bar being pivotally mounted on said dead bolt hub; said lower transmission bar being pivotAlly mounted on said thumb-turn hub; spaced cams on said thumb-turn hub, said lock cylinder cam being normally positioned between said thumb-turn hub cams adapted for key-operated engagement with said cams selectively for advancing and retracting said dead bolt; continued rotation of said cylinder cam after retraction of said dead bolt bringing said cylinder cam into operative engagement with said upper transmission bar rotating the same, in turn, rotating the lower transmission bar engaging said clutch and retracting said latch bolt.
Claim 12
Dependent Claim
67 words
In the lock of claim 10, said clutch adapted to be rotated clockwise; a horizontally disposed locking lever pivotally mounted on said casing and normally spring-biased to a position blocking retraction of said latch bolt when the door is closed; a lateral pin on said locking lever; said clutch on such clockwise rotation adapted to operatively engage said pin, lifting said locking lever to a non-blocking position.
Claim 13
Dependent Claim
80 words
In the door lock of claim 11, a horizontally disposed stop button guidably mounted on said casing and normally biased outwardly of said face plate and, adapted for retraction on closing of the door; a cam on and depending from said stop button adapted on opening of the door and forward movement of said stop button to operatively engage said locking lever pin, lifting said locking lever to a non-blocking position, said stop button when retracted disengaging said locking lever.
Claim 14
Dependent Claim
46 words
In the door lock of claim 4, said latch bolt adapted to be retracted so that with the lock button successively returned to ''''unlocked position'''' its support plate is elevated to lie in the path of and retainingly engage said clutch, holding said latch bolt retracted.
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) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |