US3901171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thread wiper
Assignee: Clinton Ind Inc
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Filing: 1974-08-05
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Granted: 1975-08-26
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Expires: 1994-08-05
Abstract
Abstract A sewing machine thread-wiping mechanism includes a pair of vertically extending parallel guide arms disposed rearwardly and above the reciprocating path of the sewing needle tip, one of the guide arms having a linear first slot and the other arm having a slot with an upper portion parallel to the first slot and an angulated lower portion. A pneumatic cylinder reciprocated slide member is located between the guide arms and carries a first follower engaging the first slot and a transverse rockable shaft provided with a crank arm carrying a second follower engaging the second slot. A picker arm extends radially from the shaft and terminates in a hook which, with the lowering and raising of the slide member, moves downwardly, forwardly, and rearwardly across the needle path, and then upwardly.
Inventors
- 👤 Salvatore Rosa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:39
CPC Classifications
D; D05; D05B; D05B65/00; D05B65/06; D05D; D05D2207/00; D05D2207/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
In a sewing machine including a needle reciprocatable along a path between a raised and a lowered position, a thread wiping mechanism comprising a picker member including a hook element having a rearwardly directed opening and actuating means disposed rearwardly and above said needle path and supporting said picker member for successively lowering said picker member toward said needle path, rocking said picker member to advance and retract said hook member across said needle path and then retracting and raising said picker member above the path of the lower end of said needle.
Claim 2
Dependent Claim
93 words
In a sewing machine including a needle reciprocatable along a path between a raised and a lowered position, a thread wiping mechanism comprising a picker member including a hook element having a rearwardly directed opening and actuating means disposed rearwardly and above said needle path and supporting said picker member for successively lowering said picker member toward said needle path, rocking said picker member to advance and retract said hook member across said needle path and then retracting and raising said picker member above the path of the lower end of said needle.
Claim 3
Dependent Claim
78 words
The thread wiping mechanism of claim 1 wherein said actuating means comprises a slide member reciprocatable between raised and lowered positions, said picker member being swingably supported by said slide member, a stationary member and a follower coupled to said picker member and engaging said stationary member along the lower path of said slide member to swing said picker member forwardly and rearwardly with the lowering and raising of said slide member proximate the bottom of its path.
Claim 4
Dependent Claim
27 words
The thread wiping mechanism of claim 2 wherein said picker member includes an elongated arm extending downwardly from said slide member and terminating in said hook element.
Claim 5
Dependent Claim
41 words
The thread wiping mechanism of claim 3 wherein said actuating means comprises a transverse shaft journalled to said slide member and supporting said picker member, and a crank arm secured to said shaft and supporting said follower eccentrically to said shaft.
Claim 6
Dependent Claim
134 words
The thread wiping mechanism of claim 1 wherein said actuating means comprises a pair of transversely spaced parallel vertically extending side arms disposed rearwardly and above said needle path and having formed therein first and second guide slots having parallel linear upper sections, said first slot having a cam defining lower section angularly related to said slot upper section, a slide member slidably disposed between and movable along said tracks, a transverse shaft journalled to said slide member, a crank arm mounted on said shaft, a first follower located on said crank arm and engaging said first slot, a second follower located on said slide member and engaging said second slot, said picker member including an arm extending from said shaft and terminating in said hook member, and means for reciprocating said slide member.
Claim 7
Dependent Claim
26 words
The thread wiping mechanism of claim 5 wherein said slide member reciprocating means comprises a pneumatic cylinder having a piston rod connected to said slide member.
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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |