US3921553A - Lock stitch rotating shuttle - Google Patents
Lock stitch rotating shuttle Download PDFInfo
- Publication number
- US3921553A US3921553A US524864A US52486474A US3921553A US 3921553 A US3921553 A US 3921553A US 524864 A US524864 A US 524864A US 52486474 A US52486474 A US 52486474A US 3921553 A US3921553 A US 3921553A
- Authority
- US
- United States
- Prior art keywords
- shuttle
- thread
- guide sheet
- tip
- lock stitch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B57/00—Loop takers, e.g. loopers
- D05B57/08—Loop takers, e.g. loopers for lock-stitch sewing machines
- D05B57/10—Shuttles
- D05B57/14—Shuttles with rotary hooks
Definitions
- This invention relates in general to the construction of sewing machine shuttles and in particular to a new and useful lock stitch rotating shuttle construction.
- the present invention deals particularly with the construction of a lock stitch rotating shuttle which includes a guide shoulder providing the shuttle tip for the thread.
- the guide shoulder is a portion of the shuttle body and it is covered by the thread guiding sheet.
- the shoulder wall extending perpendicularly to the orbital plane is inclined in order to urge the thread off the sheet.
- it is necessary to prestress and secure the thread guiding sheet so that no gap is formed between the sheet and the contact edge of the guide shoulder. Also these aforementioned conditions can be satisfied only with considerable labor costs and with particular care during the assemblage of the shuttle.
- the present invention provides a lock stitch rotating shuttle construction which is an improvement over the known constructions and is less expensive.
- the guide shoulder for the thread is located on the thread guiding sheet.
- the guide sheet is designed as a guide element which is firmly connected with the thread guiding sheet and has a free end which projects into a recess provided in the shuttle body.
- the guide element is formed by partly cutting out and bending off a portion of the thread guiding sheet.
- a lock stitch rotating thread shuttle which includes a curved shuttle body having a forward oblique edge terminating in a shuttle tip for the thread which has an area adjacent to forward edge of reduced diameter located below a curved thread guide sheet which overlies the shuttle body and which has a tongue which projects into a recess defined in the body.
- a further object of the invention is to provide a lock stitch rotating thread shuttle which is simple in design, rugged in construction and economical to manufac- IUI'C.
- FIG. 1 is an exploded perspective view of a rotating shuttle having a thread guiding sheet which is shown separated from the shuttle body and which is constructed in accordance with the invention
- FIG. 2 is an enlarged partial sectional view taken along the line IIII of FIG. 1..
- the invention in particular the invention embodied therein comprises a lock stitch rotating thread shuttle which includes a shuttle body 1 having a bottom part 2 of a bobbin case which is guided in an annular groove (not shown) of the shuttle body.
- a bobbin 3 is received in a top part 4 of the bobbin case and it is retained on a pin 6 of the bottom part 2 by means of a lid 5.
- the shuttle body 1 includes a peripheral wall having a thick portion 9 and an area of reduced thickness 9a adjacent a forward edge portion.
- the thicker portion 9 terminates in an edge 8 which is located behind a shuttle tip 7 formed on the forward edge portion 9a.
- a thread guiding sheet 11 covers the shuttle body over the thicker portion 9 and is secured thereto by screws I0.
- the forward edge of the guiding sheet 11 terminates in a tip 12 which is positioned approximately at the level of the shuttle tip 7 but laterally thereof. Between the tip 12 and the portion adjacent the edge 8, the thread guiding sheet 11 is provided with a wedge shaped cutout portion 13 leav ing a triangular tongue 14 integral with the sheet.
- the tongue 14 is bent off at a right angle toward the shuttle center and it projects into a bore or recess 15 which is provided in a forward portion 9a of the shuttle body 1 located behind the shuttle tip 7.
- the tongue 14 forms a shoulder for guiding the needle thread after the thread has been picked up by the shuttle tip 7 and it is spaced from the shuttle tip by the same distance as is usual for the guide shoulder in a conventional shuttle.
- the edge 8 is sufficiently spaced from the tongue 14 so that during the sewing operation the needle thread does not come into contact with this edge.
- the edge 8 is followed on the opposite edge by an oblique edge 16 which extends obliquely to the front side of the shuttle and is also located outside the needle thread path.
- a lock stitch rotating thread shuttle comprising a curved shuttle body having a forward oblique edge terminating in a shuttle tip for the thread, a curved thread guide sheet overlying and secured to said shuttle body, said shuttle body including a forward portion containing said shuttle tip of reduced dimension so that it is spaced from and parallel to an overlying portion of said thread guide sheet, a recess defined in said shuttle body forward portion, said thread guide sheet having a tongue portion projecting into the recess of said shuttle body.
- a lock stitch rotating thread shuttle according to claim 1 wherein said tongue is formed as an integral cutaway and bent portion of said guide sheet.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE7402540 | 1974-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3921553A true US3921553A (en) | 1975-11-25 |
Family
ID=6643448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US524864A Expired - Lifetime US3921553A (en) | 1974-01-25 | 1974-11-18 | Lock stitch rotating shuttle |
Country Status (2)
Country | Link |
---|---|
US (1) | US3921553A (ja) |
JP (1) | JPS567252Y2 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5617803A (en) * | 1995-04-27 | 1997-04-08 | Bakron Corp. | Rotary loop taker with replaceable tip |
US20160040341A1 (en) * | 2014-08-05 | 2016-02-11 | Cm Cerliani S.R.L. | Hook for lockstitch sewing machine comprising at least one tension spring to create a stable tension of the bobbin thread |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5822703Y2 (ja) * | 1978-03-03 | 1983-05-14 | 株式会社佐文工業所 | 水平全回転釜の外釜 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2102954A (en) * | 1937-03-02 | 1937-12-21 | Richard K Hohmann | Rotary loop taker |
US2718858A (en) * | 1951-08-28 | 1955-09-27 | Singer Mfg Co | Loop-taker adjusting means for sewing machines |
US2851977A (en) * | 1956-12-31 | 1958-09-16 | Singer Mfg Co | Loop takers for lock stitch sewing machines |
US3381642A (en) * | 1964-07-31 | 1968-05-07 | Necchi Spa | Bobbin case holder for sewing machines |
-
1974
- 1974-11-06 JP JP1974133760U patent/JPS567252Y2/ja not_active Expired
- 1974-11-18 US US524864A patent/US3921553A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2102954A (en) * | 1937-03-02 | 1937-12-21 | Richard K Hohmann | Rotary loop taker |
US2718858A (en) * | 1951-08-28 | 1955-09-27 | Singer Mfg Co | Loop-taker adjusting means for sewing machines |
US2851977A (en) * | 1956-12-31 | 1958-09-16 | Singer Mfg Co | Loop takers for lock stitch sewing machines |
US3381642A (en) * | 1964-07-31 | 1968-05-07 | Necchi Spa | Bobbin case holder for sewing machines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5617803A (en) * | 1995-04-27 | 1997-04-08 | Bakron Corp. | Rotary loop taker with replaceable tip |
US20160040341A1 (en) * | 2014-08-05 | 2016-02-11 | Cm Cerliani S.R.L. | Hook for lockstitch sewing machine comprising at least one tension spring to create a stable tension of the bobbin thread |
US10273615B2 (en) * | 2014-08-05 | 2019-04-30 | Cm Cerliani S.R.L. | Hook for lockstitch sewing machine comprising at least one tension spring to create a stable tension of the bobbin thread |
Also Published As
Publication number | Publication date |
---|---|
JPS50107362U (ja) | 1975-09-03 |
JPS567252Y2 (ja) | 1981-02-17 |
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