US3563196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drive arrangement for sewing machines
Assignee: Duerkoppwerke GmbH
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Filing: 1969-06-19
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Granted: 1971-02-16
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Expires: 1989-06-19
Abstract
Abstract A drive arrangement for sewing machines, especially buttonholestitching machines, having a needle drive shaft and a stitchformer drive shaft to be independently rotated. The drive arrangement comprises an electric motor whose countershaft is provided with belt drive sheaves at axially spaced locations thereon. The countershaft is pivoted relating to the motor assembly below the fabric feed table of the machine about an axis laterally offset from the shaft axis but parallel thereto and against a spring establishing belt tension. The machine arm or head is tiltable about a horizontal axis and entrains the countershaft with it to eliminate the need for disconnecting the belts passing around the needle-drive-shaft pulley and one of the sheaves.
Inventors
- 👤 Karl Nicolay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:27
CPC Classifications
D; D05; D05B; D05B69/00; D05B69/10; D05B69/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A sewing machine assembly comprising a support; a needleactuating upper machine portion pivotally mounted on said support for swinging movement about a generally horizontal axis and provided with at least one drive shaft offset therefrom; a motor, a countershaft driven thereby and located below the pivotal axis of said upper portion; a belt drive interconnecting said shaft; and means enabling swinging movement of said countershaft to follow the movement of said upper portion upon the displacement thereof about its axis said electric motor being mounted on said support and including a motor shaft in axial alignment with said countershaft, said means enabling swinging movement of said countershaft including a device connecting one end of said countershaft with said motor shaft and permitting relative flexing movement of the other end of said countershaft; and means supporting said countershaft remote from said device on said support while permitting said flexing movement of the end of said countershaft whereby said belt drive remains interconnected during said movement of said upper portion.
Claim 2
Dependent Claim
168 words
A sewing machine assembly comprising a support; a needleactuating upper machine portion pivotally mounted on said support for swinging movement about a generally horizontal axis and provided with at least one drive shaft offset therefrom; a motor, a countershaft driven thereby and located below the pivotal axis of said upper portion; a belt drive interconnecting said shaft; and means enabling swinging movement of said countershaft to follow the movement of said upper portion upon the displacement thereof about its axis said electric motor being mounted on said support and including a motor shaft in axial alignment with said countershaft, said means enabling swinging movement of said countershaft including a device connecting one end of said countershaft with said motor shaft and permitting relative flexing movement of the other end of said countershaft; and means supporting said countershaft remote from said device on said support while permitting said flexing movement of the end of said countershaft whereby said belt drive remains interconnected during said movement of said upper portion.
Claim 3
Dependent Claim
23 words
The assembly defined in claim 1 wherein said device is a flexible coupling interconnecting an end of said countershaft with said motor shaft.
Claim 4
Dependent Claim
41 words
The assembly defined in claim 2 wherein said supporting means includes a lever fulcrumed about an axis parallel to the axis of said motor shaft but axially spaced therefrom and a spherical self-aligning bearing on said lever rotatably receiving said countershaft.
Claim 5
Dependent Claim
39 words
The assembly defined in claim 2 wherein said belt drive includes a V-belt sheave anchored to said countershaft close to said lever, a V-belt pulley anchored to said drive shaft and a V-belt connecting said pulley with said sheave.
Claim 6
Dependent Claim
29 words
The assembly defined in claim 4, further comprising spring means bearing upon said lever for yieldably resisting movement of said countershaft to follow the movement of said upper portion.
Claim 7
Dependent Claim
47 words
The assembly defined in claim 5 wherein said spring means includes a bolt articulated to said lever, a pivotal eye mounted on said support and slidably receiving said bolt, and a helical compression spring surrounding said bolt and received under precompression between said support and said lever.
Claim 8
Dependent Claim
35 words
The assembly defined in claim 6, further comprising adjustable stop means threaded onto said bolt for varying the resisting force of said spring to movemenT of said countershaft to follow the movement of said portion.
Claim 9
Dependent Claim
47 words
The assembly defined in claim 6 wherein said support is provided with a pair of spaced-apart support blocks, a horizontal pivot shaft received in said blocks and defining the fulcrum for said lever, and a support arm angularly adjustable on said pivot shaft and carrying said motor.
Claim 10
Dependent Claim
93 words
The assembly defined in claim 8 wherein said support is provided with a second drive shaft parallel to the first-mentioned drive shaft, said drive shafts lying in respective vertical planes, said pivot axis including a shaft lying in a vertical plane at an inclination to the vertical planes of said drive shafts, said motor shaft being provided with a V-belt sheave, said second drive shaft being provided with a V-belt pulley, and said assembly further comprising a V-belt interconnecting the pulley of said second drive shaft and the sheave of said motor shaft.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |