US3016032A - Rotary hook for sewing machines - Google Patents
Rotary hook for sewing machines Download PDFInfo
- Publication number
- US3016032A US3016032A US722167A US72216758A US3016032A US 3016032 A US3016032 A US 3016032A US 722167 A US722167 A US 722167A US 72216758 A US72216758 A US 72216758A US 3016032 A US3016032 A US 3016032A
- Authority
- US
- United States
- Prior art keywords
- retaining
- locking
- locking member
- body means
- ring
- 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
- a movable bobbin holder device is connected to the hook body by means of a movable coaxial locking device with that body which can be turned on a common axis so that the disengagement of the parts is obtained by means of rotation.
- FIG. 1 shows an axial section, along a line II (FIG. 3) of the rotary body
- FIG. 2 shows the single parts of the rotary hook in perspective, according to the way they are assembled
- FIG. 3 is a back View of the hook in the normal sewing position
- FIG. 4 shows the same back view after the disengagement has taken place
- FIG. 5 illustrates the rotary hook fitted into the sewing machine.
- the rotary body indicated as 1 and provided with a catching hook 2 is fixed by means of screws 4 on shaft 3, the latter continuously rotating, as is commonly known and therefore not illustrated.
- the rotary body is provided with a circular guide 5 which is partly closed by the retaining ring 6 of the bobbin case holder 8 so as to form a groove which will house the circular rib 7 of the bobbin case holder 8.
- a circular guide 5 which is partly closed by the retaining ring 6 of the bobbin case holder 8 so as to form a groove which will house the circular rib 7 of the bobbin case holder 8.
- Inside the bobbin case holder there is, as usual, an axial pivot 9 onto which the bobbin case 9 (FIG. 5) will be slipped.
- the catching hook 2 instead of being part of the body 1, could be an end of the retaining ring 6.
- the retaining ring 6 has two small axial pins 19 and 11 which match the two grooves 12 and 13 of the hook body 1. These pins have two notches 14 and 15, respectively, designed to receive the locking device.
- the locking device is formed by the two blades 16 and 17 of the elastic plate 18 fixed to the knurled locking ring 19, This locking ring is fitted to the hook body hub 1 and can rotate but its rotation is limited by a pivot 29 (FIGS. 3 and 4) connected to the hook body 1 and which extends into the slot 21 on locking ring 19.
- the locking ring 19 is axially held by retainer 22 by means of washer 23 which provides friction for the locking ring rotation.
- the hook is then positioned as illustrated in FIG. 4. To fix it in that position, the locking ring 19 must be rotated in the direction indicated by the arrow b until it is in the position shown in FIG. 3.
- the bobbin case holder 8 is held in a fixed position by means of the retainer 25 (FIG. 5) corresponding to the slot 26 on the bobbin case holder 8.
- the retainer 25 is a part of the piece 27 fixed on the lower part of the needle plate 28 (FIG. 5). Therefore, when pieces of thread or dirt get stuck between the rib 7 and the guide formed by parts 5 and 6, causing the rotary body to jam in respect of the bobbin case holder 8, the disengaging device of the parts, formed by the locking ring 19 that can be rotated, is particularly handy because it is always possible to move it in whatever position it stops. if the dismantling were to be obtained by moving two pieces situated in determined positions around the rotary body, there would always be the risk of their stopping near the needle plate or near the retainer 25 of the bobbin case holder 8 and the small space available would make it impossible to move them.
- the locking devices are sprung (elastic blades 16-17) so that in the case of lint or dirt getting caught, the retaining ring 6 of the bobbin case holder 8 can move slightly away along its axis, from the rotary body thus avoiding sudden jamming and consequent serious inconveniences in the running of the machine.
- the blades 16 and 17 are slanted in respect to the perpendicular plane of the rotation axis so that the locking motion determines an elastic deformation of the blades and consequently an axial locking load between the parts 1 and 6.
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis: and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking me her, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means.
- a rotary hook for sewing machines co-mrising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said looking member is turned in the opposite direction to disengage from looking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means; and resilient means secured to said body means and abutting said locking member and frictionally engaging the latter so as to permit turning movement of said locking member while frictionally holding said locking member in the locking and releasing positions.
- rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a.
- said second operative engaging component on said looking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means totpermit movement of said retaining means in the axial direction of said body means for removal of said retaining means.
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means and resilient means secured to said body means
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably'mounted on said body means and abutting said body means in axial-direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring and a portion radially projecting from said rotary body means so as to'be adapted to be manually gripped for turning said locking member; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means, said blade means being slanted to
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprisinga first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pin fixedly secured to said retaining ring and extending in said axial direction, said pin engaging a matching portion of said body means to prevent turning of said retaining ring relative to said body means, said pin having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pair of pins fixedly secured to said retaining ring and extending in said axial direction, each of said pins engaging matching portions of said body means to prevent turning of said retaining ring relative to said body means, each of said pins having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second
- a rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mount ed on said body means for turning movement about said axis, said locking member including a manually turnable ring having a knurled surface to facilitate manual operation; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pair of pins fixedly secured to said retaining ring in diametrically opposed positions and extending in said axial direction, each of said pins engaging matching portions of said body means to prevent turning of said retaining ring relative to said body means, each of said pins having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Description
Jan. 9, 1962 BONO 3,016,032
ROTARY HOOK FOR SEWING MACHINES Filed March 18, 1958 2 Sheets-Sheet 1 9 FIG.
V INVENTOR.
Jan; 9, 1962 L. BONO 3,016,032
ROTARY HOOK FOR SEWING MACHINES Filed March 18. 1958 2 Sheets-Sheet 2 FIG. 2
INVENTOR.
, WJ f f k.
j /fl r 7 United States Patent 3,016,032 Patented Jan. 9, 1962 3,616,032 ROTARY HGGK FGR SEWING MACHINES Luigi Bono, Pavia, Milan, Italy, assignor to Necchi S.p.A., Pavia, italy filed Mar. 18, 1953, Ser. No. 722,167 Claims priority, application Italy Mar. 28, 1957 9 Claims. (Cl. 112236} This invention refers to a rotary hook for two threaded, lockstitch sewing machines. The purpose is to introduce a few improvements to the parts connecting the retaining ring of the bobbin case holder to the rotary hook body.
In accordance with the present invention, a movable bobbin holder device is connected to the hook body by means of a movable coaxial locking device with that body which can be turned on a common axis so that the disengagement of the parts is obtained by means of rotation.
in order that the present invention may be readily carried into effect, it will now be described with reference to the accompanying drawing, wherein:
FIG. 1 shows an axial section, along a line II (FIG. 3) of the rotary body;
FIG. 2 shows the single parts of the rotary hook in perspective, according to the way they are assembled;
FIG. 3 is a back View of the hook in the normal sewing position;
FIG. 4 shows the same back view after the disengagement has taken place; and
FIG. 5 illustrates the rotary hook fitted into the sewing machine.
The rotary body indicated as 1 and provided with a catching hook 2, is fixed by means of screws 4 on shaft 3, the latter continuously rotating, as is commonly known and therefore not illustrated.
The rotary body is provided with a circular guide 5 which is partly closed by the retaining ring 6 of the bobbin case holder 8 so as to form a groove which will house the circular rib 7 of the bobbin case holder 8. Inside the bobbin case holder there is, as usual, an axial pivot 9 onto which the bobbin case 9 (FIG. 5) will be slipped.
It must be understood that, without drifting away from the subject, the catching hook 2, instead of being part of the body 1, could be an end of the retaining ring 6. The retaining ring 6 has two small axial pins 19 and 11 which match the two grooves 12 and 13 of the hook body 1. These pins have two notches 14 and 15, respectively, designed to receive the locking device.
The locking device is formed by the two blades 16 and 17 of the elastic plate 18 fixed to the knurled locking ring 19, This locking ring is fitted to the hook body hub 1 and can rotate but its rotation is limited by a pivot 29 (FIGS. 3 and 4) connected to the hook body 1 and which extends into the slot 21 on locking ring 19. The locking ring 19 is axially held by retainer 22 by means of washer 23 which provides friction for the locking ring rotation.
When the hook is in normal sewing position, as in FIGS. 1 and 3, the elastic blades 16 and 17 of the plate 18 will engage in notches and 14 of the small pins 16 and 11, exerting an axial load on them in the direction indicated by the arrows A (FIG. 1), thus efiecting the exact positioning and connecting of the retaining ring 6 to the hook body 1; a slight elasticity between the two parts will prove very useful when dirt or pieces of thread are caught in between. The disengagement of the retaining ring 6 for the ex traction of the bobbin case holder 8 is obtained by rotating the locking ring 19 in the direction indicated by the arrow a (FIG. 3) while shaft 3 is held steady by the other parts of the sewing machine. The locking ring 19 has been provided with m appropriate knurled border 24 to facilitate rotation.
Once the rotation has been effected (FIG. 4), the small pins 19 and 11 will be disengaged from the blades 16 and 17 so that the retaining ring 6 can be easily extracted. When the retaining ring 6 and the bobbin case holder 8 have been removed for cleaning of the circular guide 5, the locking ring 19 will remain in the position indicated in H6. 4, because the elastic washer 23 exerts sufilcient friction between the surfaces in contact of the locking ring 19 and the hook body 1, to avoid a reciprocal rotation of the two parts. This is useful for the reassembling of retaining ring 6. For this operation the bobbin case holder 8 must be inserted with its rib 7 resting on guide 5, then the retaining ring 6 must be reassembled by inserting the two small pins 10 and 11 respectively into the two grooves 12 and 13.
The hook is then positioned as illustrated in FIG. 4. To fix it in that position, the locking ring 19 must be rotated in the direction indicated by the arrow b until it is in the position shown in FIG. 3.
As is well known, the bobbin case holder 8 is held in a fixed position by means of the retainer 25 (FIG. 5) corresponding to the slot 26 on the bobbin case holder 8.
The retainer 25 is a part of the piece 27 fixed on the lower part of the needle plate 28 (FIG. 5). Therefore, when pieces of thread or dirt get stuck between the rib 7 and the guide formed by parts 5 and 6, causing the rotary body to jam in respect of the bobbin case holder 8, the disengaging device of the parts, formed by the locking ring 19 that can be rotated, is particularly handy because it is always possible to move it in whatever position it stops. if the dismantling were to be obtained by moving two pieces situated in determined positions around the rotary body, there would always be the risk of their stopping near the needle plate or near the retainer 25 of the bobbin case holder 8 and the small space available would make it impossible to move them.
As mentioned, the locking devices are sprung (elastic blades 16-17) so that in the case of lint or dirt getting caught, the retaining ring 6 of the bobbin case holder 8 can move slightly away along its axis, from the rotary body thus avoiding sudden jamming and consequent serious inconveniences in the running of the machine. Moreover, the blades 16 and 17 are slanted in respect to the perpendicular plane of the rotation axis so that the locking motion determines an elastic deformation of the blades and consequently an axial locking load between the parts 1 and 6.
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can by applying current knowledge readily adapt it for vari 0113 applications without omitting features that, from the standpoint of prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention and, therefore, such adaptations should and are intended to be comprehended within the meaning. and range of equivalence of the following claims.
What is claimed as new and desired to be secured by Letters Patent is:
I claim:
1. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis: and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking me her, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means.
2. A rotary hook for sewing machines co-mrising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said looking member is turned in the opposite direction to disengage from looking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means; and resilient means secured to said body means and abutting said locking member and frictionally engaging the latter so as to permit turning movement of said locking member while frictionally holding said locking member in the locking and releasing positions. I
3. -A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a. second operative engaging component on said looking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means totpermit movement of said retaining means in the axial direction of said body means for removal of said retaining means. 7
4. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means and resilient means secured to said body means and abutting said locking member and fric tionally engaging the latter so as to permit turning movement of said locking member while frictionally holding said locking member in the locking and releasing positions. t
5. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably'mounted on said body means and abutting said body means in axial-direction for retaining a bobbin holder in said body means; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring and a portion radially projecting from said rotary body means so as to'be adapted to be manually gripped for turning said locking member; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means and resilient means secured to said body means and abutting said locking member and frictionally engaging the latter so as to permit turning movement of said looking member while frictionally holding said locking member in the iocking and releasing positions. a
6. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means and abutting said body means in axial direction for retaining a bobbin holder in said body means; locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said second operative engaging component comprising resilient blade means secured to said ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means, said blade means being slanted to the axial direction of said body means so that the resilient locking pressure of said blade means on said retaining means increases during turning movement of said locking member toward the locking position.
7. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprisinga first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pin fixedly secured to said retaining ring and extending in said axial direction, said pin engaging a matching portion of said body means to prevent turning of said retaining ring relative to said body means, said pin having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact wherein said blade means engages said cutout to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from looking contact wherein said blade means disengages from said cutout to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means.
8. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mounted on said body means for turning movement about said axis, said locking member including a manually turnable ring; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pair of pins fixedly secured to said retaining ring and extending in said axial direction, each of said pins engaging matching portions of said body means to prevent turning of said retaining ring relative to said body means, each of said pins having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact wherein said blade means engages said cutouts to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact wherein said blade means disengages from said cutouts to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means, said blade means being slanted to the axial direction of said body means so that the resilient locking pressure of said blade means on said retaining means increases during turning movement of said locking member toward the locking position.
9. A rotary hook for sewing machines comprising, in combination, rotary body means having an axis; retaining means non-rotatably mounted on said body means including a retaining ring for retaining a bobbin holder in said body means, said retaining ring abutting said body means in axial direction; a locking member mount ed on said body means for turning movement about said axis, said locking member including a manually turnable ring having a knurled surface to facilitate manual operation; and locking means comprising a first operative engaging component on said retaining means and a second operative engaging component on said locking member, said first operative component comprising a pair of pins fixedly secured to said retaining ring in diametrically opposed positions and extending in said axial direction, each of said pins engaging matching portions of said body means to prevent turning of said retaining ring relative to said body means, each of said pins having at the free end thereof a cutout, said second operative engaging component comprising resilient blade means secured to said manually turnable ring and extending transverse to said axial direction so as to be resilient in said axial direction, said first and second operative engaging components being positioned when said locking member is turned in one direction to engage in locking contact wherein said blade means engages said cutouts to lock said retaining means to said body means and when said locking member is turned in the opposite direction to disengage from locking contact wherein said blade means discngages from said cutouts to release said retaining means from said body means to permit movement of said retaining means in the axial direction of said body means for removal of said retaining means, said blade means being slanted to the axial direction of said body means so that the resilient locking pressure of said blade means on said retaining means increases during turning movement of said locking member toward the locking position.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT853348X | 1957-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3016032A true US3016032A (en) | 1962-01-09 |
Family
ID=11327040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US722167A Expired - Lifetime US3016032A (en) | 1957-03-28 | 1958-03-18 | Rotary hook for sewing machines |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3016032A (en) |
| DE (1) | DE1116520B (en) |
| FR (1) | FR1193578A (en) |
| GB (1) | GB853348A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3381642A (en) * | 1964-07-31 | 1968-05-07 | Necchi Spa | Bobbin case holder for sewing machines |
| CN113622108A (en) * | 2021-09-13 | 2021-11-09 | 绍兴雷亮纺织有限公司 | Shuttle peg and shuttle shell for embroidery machine |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1235214A (en) * | 1958-11-05 | 1960-07-01 | Borletti Spa | Combination device of rotary hook and bobbin holder drum for sewing machines |
| CH390035A (en) * | 1962-01-10 | 1965-03-31 | Gegauf Fritz Ag | Circulating sewing machine gripper |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE493748C (en) * | 1930-03-14 | Mundlos Akt Ges | Exchangeable gripper track with removable cover on your basket | |
| US2469517A (en) * | 1948-03-08 | 1949-05-10 | Gellman Mfg Company | Sewing-machine loop taker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE493915C (en) * | 1927-09-30 | 1930-03-17 | Mundlos Akt Ges | Free-running gripper for sewing machines |
-
1958
- 1958-03-18 US US722167A patent/US3016032A/en not_active Expired - Lifetime
- 1958-03-24 GB GB9378/58A patent/GB853348A/en not_active Expired
- 1958-03-25 FR FR1193578D patent/FR1193578A/en not_active Expired
- 1958-03-26 DE DEN14863A patent/DE1116520B/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE493748C (en) * | 1930-03-14 | Mundlos Akt Ges | Exchangeable gripper track with removable cover on your basket | |
| US2469517A (en) * | 1948-03-08 | 1949-05-10 | Gellman Mfg Company | Sewing-machine loop taker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3381642A (en) * | 1964-07-31 | 1968-05-07 | Necchi Spa | Bobbin case holder for sewing machines |
| CN113622108A (en) * | 2021-09-13 | 2021-11-09 | 绍兴雷亮纺织有限公司 | Shuttle peg and shuttle shell for embroidery machine |
Also Published As
| Publication number | Publication date |
|---|---|
| GB853348A (en) | 1960-11-02 |
| FR1193578A (en) | 1959-11-03 |
| DE1116520B (en) | 1961-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3016032A (en) | Rotary hook for sewing machines | |
| US1316444A (en) | A cokpobatiomt | |
| US4453624A (en) | Handwheel clutch for sewing machines | |
| US2034506A (en) | Sewing machine | |
| US3437284A (en) | Smooth tension sewing machine bobbin case and bobbin | |
| US3338528A (en) | Bobbin supporting apparatus | |
| US3490402A (en) | Apparatus for use in replenishing bobbin underthread in a lock stitch sewing machine | |
| US3095765A (en) | Two-speed drive for sewing machines | |
| GB906398A (en) | Stitch-forming mechanism for lock stitch sewing machines | |
| US2594523A (en) | Bobbin casing retaining means | |
| GB704037A (en) | Improvements in textile ring spinning and analogous machines | |
| US2742008A (en) | Bobbin-thread cases | |
| US3049086A (en) | Loop taker for sewing machines | |
| US2869495A (en) | Rotary hook for sewing machines | |
| GB538841A (en) | Improvements in thread-winding machines | |
| US2983455A (en) | Bobbin winder mechanism for sewing machines | |
| US3090335A (en) | Rotary hook for sewing machines | |
| US3067703A (en) | Combination rotary hook and bobbinholding basket device for sewing machines | |
| US1940435A (en) | Bobbin-winding device for sewing machines | |
| US2420695A (en) | Sewing machine | |
| US2664059A (en) | Spool box for sewing machines | |
| US2557844A (en) | Sewing machine | |
| GB900823A (en) | Improvements in or relating to bobbin winding devices for sewing machines | |
| US1409668A (en) | Sewing awl | |
| US2974618A (en) | Thread carriers for sewing machine loop takers |