US3133168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door latch and switch operating mechanism
Assignee: General Electric Co
•
Filing: 1962-05-25
•
Granted: 1964-05-12
•
Expires: 1982-05-25
Abstract
No abstract record available.
Inventors
- 👤 Chester F Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:10
CPC Classifications
A; A47; A47L; A47L15/00; A47L15/42; A47L15/4251; A47L15/4257; A47L15/4259; Y; Y10; Y10S; Y10S292/00; Y10S292/69; Y10T; Y10T292/00; Y10T292/08; Y10T292/0863
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
174 words
A MECHANISM FOR LATCHING A DOOR TO AN ADJACENT DOOR JAMB, COMPRISING: A PLUNGER SHAFT EXTENDING THROUGH AND SECURED TO THE DOOR FOR ROTATION ABOUT THE AXIS OF SAID SHAFT, A PLUNGER RECEIVING STRUCTURE AFFIXED TO THE DOOR JAMB ADJACENT SAID PLUNGER SHAFT, DETENT MEANS IN SUCH STRUCTURE, MEANS FOR RESILIENTLY BIASING SAID DETENT MEANS TO A POSITION NORMALLY OBSTRUCTING SAID SHAFT AS THE DOOR IS MOVED TOWARD SAID JAMB, MEANS ON SAID SHAFT ENGAGEABLE WITH SAID DETENT MEANS AND EFFECTIVE IN OPPOSITION TO THE BIASING MEANS THEREOF TO DISPLACE SAID DETENT MEANS TO PERMIT PASSAGE OF SAID SHAFT THEREBY DURING SAID DOOR MOVEMENT, A REDUCED-DIAMETER NECK PORTION ON SAID SHAFT CONFIGURATED FOR ENGAGEMENT BY SAID DETENT MEANS TO HOLD THE DOOR AS SAID DOOR IS MOVED TO A FIRST CLOSED POSITION, AND A PLURALITY OF CAM SURFACES ON SAID PLUNGER SHAFT, SAID CAM SURFACES POSITIONED TO MAINTAIN ENGAGEMENT WITH SAID DETENT MEANS WHILE EFFECTIVE UPON ROTATION OF SAID SHAFT RELATIVE TO SAID DETENT MEANS TO DRAW SAID DOOR TO A SECOND CLOSED POSITION.
Claim 2
Dependent Claim
174 words
A MECHANISM FOR LATCHING A DOOR TO AN ADJACENT DOOR JAMB, COMPRISING: A PLUNGER SHAFT EXTENDING THROUGH AND SECURED TO THE DOOR FOR ROTATION ABOUT THE AXIS OF SAID SHAFT, A PLUNGER RECEIVING STRUCTURE AFFIXED TO THE DOOR JAMB ADJACENT SAID PLUNGER SHAFT, DETENT MEANS IN SUCH STRUCTURE, MEANS FOR RESILIENTLY BIASING SAID DETENT MEANS TO A POSITION NORMALLY OBSTRUCTING SAID SHAFT AS THE DOOR IS MOVED TOWARD SAID JAMB, MEANS ON SAID SHAFT ENGAGEABLE WITH SAID DETENT MEANS AND EFFECTIVE IN OPPOSITION TO THE BIASING MEANS THEREOF TO DISPLACE SAID DETENT MEANS TO PERMIT PASSAGE OF SAID SHAFT THEREBY DURING SAID DOOR MOVEMENT, A REDUCED-DIAMETER NECK PORTION ON SAID SHAFT CONFIGURATED FOR ENGAGEMENT BY SAID DETENT MEANS TO HOLD THE DOOR AS SAID DOOR IS MOVED TO A FIRST CLOSED POSITION, AND A PLURALITY OF CAM SURFACES ON SAID PLUNGER SHAFT, SAID CAM SURFACES POSITIONED TO MAINTAIN ENGAGEMENT WITH SAID DETENT MEANS WHILE EFFECTIVE UPON ROTATION OF SAID SHAFT RELATIVE TO SAID DETENT MEANS TO DRAW SAID DOOR TO A SECOND CLOSED POSITION.
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) | 1967-05-12 | 1967-11-11 | 1968-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-12 | 1971-11-11 | 1972-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-12 | 1975-11-11 | 1976-05-12 | $7700.00 | Window Closed / Lapsed |