US3830174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tufting machines
Assignee: Philips Road Engineering Ltd
•
Filing: 1973-04-26
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Granted: 1974-08-20
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Expires: 1993-04-26
Abstract
Abstract A tufting machine comprising a framework, a main driving shaft disposed near the bottom of the framework, a needle rocker shaft disposed near the top of the framework, eccentrics on the main driving shaft at opposite sides of the machine, connected rods coupled at their lower ends to the eccentrics and pivoted at their upper ends to arms connected to the rocker shaft and adapted to oscillate the rocker shaft in response to rotation of the main driving shaft, a needle bar disposed below the rocker shaft and mounted for vertical reciprocating movement, means connecting the needle bar and the rocker shaft for imparting reciprocation to the needle bar in response to rocking of the rocker shaft, a control arm pivoted at one end to the upper end of each connecting rod and having its other end adjustable in a quadrant slot in the framework, and means external to the framework for adjusting the control arms in their respective slots and thereby adjusting the stroke of the needle bar.
Inventors
- 👤 L Mellor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:19
CPC Classifications
D; D05; D05C; D05C15/00; D05C15/04; D05C15/08; D05C15/16; D05C15/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
182 words
A tufting machine comprising a framework, a main driving shaft disposed near the bottom of the framework, a needle rocker shaft disposed near the top of the framework, arms connected to the rocker shaft, eccentrics on the main driving shaft at opposite sides of the machine, connecting rods coupled at their lower ends to the eccentrics and pivoted at their upper ends to said arms connected to the rocker shaft and adapted to oscillate the rocker shaft in response to rotation of the main driving shaft, a needle bar disposed below the rocker shaft and mounted for vertical reciprocating movement, means connecting the needle bar and the rocker shaft for imparting reciprocation to the neeceedle bar in response to rocking of the rocker shaft, a quadrant slot in said framework, a control arm pivoted at one end to the upper end of each connecting rod and having its other end adjustable in said quadrant slot in the framework, and means external to the framework for adjusting the control arms in their respective slots and thereby adjusting the stroke of the needle bar.
Claim 2
Dependent Claim
182 words
A tufting machine comprising a framework, a main driving shaft disposed near the bottom of the framework, a needle rocker shaft disposed near the top of the framework, arms connected to the rocker shaft, eccentrics on the main driving shaft at opposite sides of the machine, connecting rods coupled at their lower ends to the eccentrics and pivoted at their upper ends to said arms connected to the rocker shaft and adapted to oscillate the rocker shaft in response to rotation of the main driving shaft, a needle bar disposed below the rocker shaft and mounted for vertical reciprocating movement, means connecting the needle bar and the rocker shaft for imparting reciprocation to the neeceedle bar in response to rocking of the rocker shaft, a quadrant slot in said framework, a control arm pivoted at one end to the upper end of each connecting rod and having its other end adjustable in said quadrant slot in the framework, and means external to the framework for adjusting the control arms in their respective slots and thereby adjusting the stroke of the needle bar.
Claim 3
Dependent Claim
59 words
A tufting machine as claimed in claim 1, wherein each control arm carries a pin at its end remote from the connecting rod, the pin engaging in the arcuate sloT and carrying a washer having tongues which are engageable with slots in the framework alongside the arcuate slot to retain the pin in adjusted position within the arcuate slot.
Claim 4
Dependent Claim
64 words
A tufting machine as claimed in claim 2, in which the tongues in the washer are offset from a centre line through the axis of the washer so that, by rotating the washer through 180* about its centre, the pin may be located in different positions in the arcuate slot by engagement of the tongues in the same pair of slots in the framework.
Claim 5
Dependent Claim
85 words
A tufting machine as claimed in claim 1, in which each of the arms is pivoted by a pin to a rocker arm detachably connected to the rocker shaft and in which the rocker shaft carries, adjacent each rocker arm, a block fixed to the rocker shaft and carrying screws engaging a block on said pin, the screws being adjustable against the block after release of the rocker shaft from the rocker arms, to set the needle bar initially in its bottom dead centre position.
References Cited (Backward Citations)
US2977905A
Cited
US3626878A
Cited
US3748914A
Cited
US3633523A
Cited
US3618544A
Cited
US3749036A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |