US3748914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tufting machines
Assignee: Singer Co Ltd
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Filing: 1971-08-12
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Granted: 1973-07-31
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Expires: 1991-08-12
Abstract
Abstract In a tufting machine, the needle-stroke drive-transmission mechanism is adjustable to provide a facility for varying the length of the stroke of the needle, such mechanism comprising an oscillating drive-input member, an adjustmemt-plate mounted for limited pivotal motion about a fixed axis and connected with the said drive-input member for movement thereby, and a connectinglink means coupling together the adjustment plate and the needlestroke shaft, that end of the connecting-link means secured to the adjustment-plate being variable as to position upon the adjustment plate to provide the adjustment in needle stroke.
Inventors
- 👤 R Parsons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:33
CPC Classifications
D; D05; D05C; D05C15/00; D05C15/04; D05C15/08; D05C15/16; D05C15/20; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18184
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
157 words
A drive transmission mechanism for the needle-stroke shaft of a tufting machine comprising a drive input member, means for oscillating said drive input member in a cyclical manner, an adjustment-plate mounted for pivotal motion about a fixed axis and drivingly connected with said drive input member for imparting a cyclical motion to said adjustment-plate, said adjustment-plate having an arcuate formaTion therein, a connecting-link means having one end thereof mounted in said arcuate formation and being adjustable and pivotable relative to said arcuate formation, said connecting-link means being pivotally coupled to the needle-stroke shaft with the pivot axis of the coupling between said connecting-link means and the needle-stroke shaft lying at the center of curvature of said arcuate formation at a relative disposition thereof at one extreme position of movement of the mechanism such that said one extreme position of movement of the mechanism remains constant for different adjusted positions of said connecting-link means in said arcuate formation.
Claim 2
Dependent Claim
157 words
A drive transmission mechanism for the needle-stroke shaft of a tufting machine comprising a drive input member, means for oscillating said drive input member in a cyclical manner, an adjustment-plate mounted for pivotal motion about a fixed axis and drivingly connected with said drive input member for imparting a cyclical motion to said adjustment-plate, said adjustment-plate having an arcuate formaTion therein, a connecting-link means having one end thereof mounted in said arcuate formation and being adjustable and pivotable relative to said arcuate formation, said connecting-link means being pivotally coupled to the needle-stroke shaft with the pivot axis of the coupling between said connecting-link means and the needle-stroke shaft lying at the center of curvature of said arcuate formation at a relative disposition thereof at one extreme position of movement of the mechanism such that said one extreme position of movement of the mechanism remains constant for different adjusted positions of said connecting-link means in said arcuate formation.
Claim 3
Dependent Claim
31 words
A drive-transmission mechanism as claimed in claim 1 further including spaced side-plates between which the adjustment-plate and the connecting-link means are disposed, the said adjustment-plate being pivotally supported from such side-plates.
Claim 4
Dependent Claim
49 words
A drive-transmission mechanism as claimed in claim 1 wherein the pivot axis of the coupling means between the connecting-link means and the needle-stroke shaft lies at the centre of curvature of the arcuate formation at a relative disposition of parts appropriate to a ''bottom-centre'' position of the needle-stroke shaft.
Claim 5
Dependent Claim
21 words
A drive-transmission mechanism as claimed in claim 1 wherein the drive- input member comprises a yoke driven from an eccentric mechanism.
Claim 6
Dependent Claim
17 words
A drive-transmission mechanism as claimed in claim 1 further including a linear scale adjacent the arcuate formation.
References Cited (Backward Citations)
US2413832A
Cited
US2489513A
Cited
US3108553A
Cited
US3494077A
Cited
GB1222792A
Cited
US3593922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |