US3141432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread-trimming mechanism for sewing machines
Assignee: GM Pfaff AG
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Filing: 1963-04-25
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Granted: 1964-07-21
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Expires: 1983-04-25
Abstract
No abstract record available.
Inventors
- 👤 Reeber Rudolf
- 👤 Wenz Herbert
- 👤 Hedegaard Kristen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:19
CPC Classifications
D; D05; D05B; D05B65/00; D05B57/00; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18288
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN COMBINATION WITH A SEWING MACHINE HAVING A RECIPROCATING NEEDLE, A DRIVE SHAFT OPERABLY CONNECTED THERETO, AND AN OSCILLATING CUTTING DEVICE TO TRIM THE THREAD AT THE END OF A SEWING OPERATION, OPERATING MECHANISM FOR SAID DEVICE COMPRISING A FIRST ROCKSHAFT, LINKAGE MEANS OPERABLY CONNECTING THE SAME WITH SAID DEVICE, A SECOND ROCKSHAFT COUPLED WITH SAID FIRST ROCKSHAFT IN AXIALLY SLIDABLE RELATION THERETO, DRIVE MEANS COMPRISED OF AN ELASTIC BELT, A DRIVING MEMBER THEREFOR CONNECTED TO SAID SHAFT AND A DRIVEN MEMBER, RELEASABLE COUPLING MEANS OPERABLE BY AXIAL SHIFTING OF SAID SECOND ROCKSHAFT, TO CONNECT THE SAME WITH AND TO DISCONNECT IT FROM SAID DRIVEN MEMBER, SAID COUPLING MEANS ADAPTED TO CONVERT ROTARY MOTION OF SAID DRIVE SHAFT INTO OSCILLATING MOTION OF SAID ROCKSHAFTS WITH THE OSCILLATING PHASE PREDETERMINATELY RELATED TO THE ROTATION OF SAID DRIVE SHAFT, FIRST RESILIENT BIASING MEANS TO NORMALLY URGE SAID SECOND ROCKSHAFT TO A POSITION OF DISENGAGEMENT FROM SAID DRIVEN
Claim 2
Dependent Claim
155 words
IN COMBINATION WITH A SEWING MACHINE HAVING A RECIPROCATING NEEDLE, A DRIVE SHAFT OPERABLY CONNECTED THERETO, AND AN OSCILLATING CUTTING DEVICE TO TRIM THE THREAD AT THE END OF A SEWING OPERATION, OPERATING MECHANISM FOR SAID DEVICE COMPRISING A FIRST ROCKSHAFT, LINKAGE MEANS OPERABLY CONNECTING THE SAME WITH SAID DEVICE, A SECOND ROCKSHAFT COUPLED WITH SAID FIRST ROCKSHAFT IN AXIALLY SLIDABLE RELATION THERETO, DRIVE MEANS COMPRISED OF AN ELASTIC BELT, A DRIVING MEMBER THEREFOR CONNECTED TO SAID SHAFT AND A DRIVEN MEMBER, RELEASABLE COUPLING MEANS OPERABLE BY AXIAL SHIFTING OF SAID SECOND ROCKSHAFT, TO CONNECT THE SAME WITH AND TO DISCONNECT IT FROM SAID DRIVEN MEMBER, SAID COUPLING MEANS ADAPTED TO CONVERT ROTARY MOTION OF SAID DRIVE SHAFT INTO OSCILLATING MOTION OF SAID ROCKSHAFTS WITH THE OSCILLATING PHASE PREDETERMINATELY RELATED TO THE ROTATION OF SAID DRIVE SHAFT, FIRST RESILIENT BIASING MEANS TO NORMALLY URGE SAID SECOND ROCKSHAFT TO A POSITION OF DISENGAGEMENT FROM SAID DRIVEN
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) | 1967-07-21 | 1968-01-20 | 1968-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-21 | 1972-01-20 | 1972-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-21 | 1976-01-20 | 1976-07-21 | $7700.00 | Window Closed / Lapsed |