US2869496A - Bobbin supporting device - Google Patents

Bobbin supporting device Download PDF

Info

Publication number
US2869496A
US2869496A US552880A US55288055A US2869496A US 2869496 A US2869496 A US 2869496A US 552880 A US552880 A US 552880A US 55288055 A US55288055 A US 55288055A US 2869496 A US2869496 A US 2869496A
Authority
US
United States
Prior art keywords
bobbin case
flap
retainer
bobbin
support
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
Application number
US552880A
Other languages
English (en)
Inventor
Adam Hermann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US2869496A publication Critical patent/US2869496A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D05B57/18—Shuttles with bobbin casings held by removable caps

Definitions

  • the invention relates to a bobbin case gripping or holding device for sewing machines. It is known, for the purpose of insuring relatively silent operation of sewing machines, to provide only such a clearance or gap between the bobbin case support or stay, and the bobbin case, that the thread can slide through between them. For this purpose it is likewise known to make the flap of the gripping device, which is pivoted on the support, adjustable relative to the bobbin case. These known adjustment means do not satisfy this purpose sufiiciently, or the manipulation of these adjusting means is more or less difiicult, so that setting up of the proper adjustment requires adequate skill and extensive testing.
  • This ball joint is centrally mounted so that the bobbin case support is universally movable in the ball joint support or hearing of the pivot member. In this manner it is achieved that the bobbin case support can adapt itself so accurately to the corresponding opposite surface on the bobbin case that the desideratum of a small air gap between case and bobbin case support or stay can be obtained evenly.
  • the position of the bobbin case support with respect to its pivotable member is suitably made to be fastened by means of a screw connection.
  • a particularly simple embodiment is provided if the bobbin case support and the pivot member are connected in the ball joint by means of a head screw which is adjustably mounted in the pivot member with tolerance.
  • another object of the invention provides that the bobbin case support is not turned radially as the fastening means are loosened.
  • a suitable supporting device is to be provided which does not interfere with the universal movability of the bobbin case support in the pivot members.
  • the device can also be arranged in a manner that the bobbin case support or stay is simultaneously constructed as a pivot member in the form of a face ring having a spherically shaped surface adapted to be turned in all directions and mounted inside the flap.
  • an additional securing means for the face ring may be provided on the flap.
  • the face ring is journalled directly in the flap with its spherically shaped surface, a separate mounting of a bobbin case support beside the actual flap is eliminated. This affords first of all a simplification of the gripping or stay device as compared to the embodiments described above.
  • the securing means serves for the purpose of locking the attained adjusted setting of the face ring with respect to the bobbin case.
  • the face ring is provided with three projecting beads at its surface which faces the bobbin case. This insures that the thread sweeps only along these three points and need no longer to slide along the entire circumference of the embossed disk as heretofore.
  • the face ring is first set to the position cor responding to the front surface of the bobbin case by means of the spherical bearing surface of this face ring. Thereupon the attained position of the face ring can be secured by the fastening means. Subsequently the particular thread gap is set by operation of the aforementioned eccentric screw. if the eccentric screw is rigidly set the position of the support on the plate of the machine is secured by tightening the associated fastening screw.
  • Fig. 1 shows a front view of a bobbin case supporting arrangement looking upon the stay support and the pivot member;
  • Fig. 2 shows a side view of the supporting arrangement in accordance with Fig. 1 with a partial cross section along line IIII of Fig. 1;
  • Fig. 3 is a view substantially as in Fig. 2, also in section of a different embodiment of a device;
  • Fig. 4 illustrates a third embodiment of a bobbin case support looking at the front of the support
  • Fig. 5 is a sectional view of the bobbin case support in accordance with Fig. 4, taken along the line V-V,
  • Fig. 6 is a detail illustrating the open position of the support.
  • Fig. 7 illustrates the relationship of parts 31, 33 and 36.
  • the gripping arrangement comprises the bobbin gripper support or retainer 1 with the pivot member 2.
  • the pivot member 2 is pivotally mounted on the support 3 by means of stud 4.
  • the bobbin gripper support or retainer is connected with the pivot member 2 by means of head screw 5.
  • the central portion of the bobbin case support 1 is provided at the outer surface of the support and the pivot member 2 at its coordinated inner surface with a spherical surface arrangement.
  • the thread portion 6 of the head screw 5 is guided in the pivot member 2 with tolerance.
  • the head screw 5 has also a base or washer 8. Upon loosening the head screw 5 the bobbin case support can thus be moved in different directions in this ball joint.
  • the embossed ring 9 on the bobbin case support 1 can evenly adjust itself with respect to the front surface 1d of the bobbin case 11.
  • an eccentric ball head screw 12 is provided having a nut 13 for securing the ball head in position.
  • the ball head 14 is disposed in a slot 15 of the bobbin case support 1.
  • This form of securing the bobbin case support or retainer against turning with respect to pivot member 2 is chosen for the pr of avoiding interference with the universal movabiiity oi the bobbin case retainer l-l relative to the pivot member 2 in the ball joint 5, e.
  • the securing of the bobbin case against displacement with respect to the bobbin case retainer is achieved in a known manner by means of 1: lug 16 which engages a corresponding slot in the bobbin case.
  • the bobbin case retainer is made of a noise suppressing artificial material, chosen preferably from the group of the polyamides.
  • this bobbin case retainer there is a steel insert '7 having a central portion which corresponds to the spherical surface of the retainer but which is also provided With a thread to receive the thread of the head screw the pivot member 2 may be made of the same material and may likewise be provided with a steel insert 13.
  • the bobbin casc support 25 is made of steel as is the pivot member 26,
  • a contact disk 27 made of any suitable material such as metal or synthetic resin is provided in the bobbin case support which is held in position against an intermediate felt ring 23 and a spring 29.
  • the construction of the embodiment in accordance with Fig. 3 corresponds to the embodiment in accordance with Figs. 1 and 2 described above.
  • the bobbin case supporting means comprise the flap 31 which is pivotably mounted on the base 32 by means of a pin 33.
  • the base 32 is secured by means of head screw 34 to the plate 35 of the sewing machine.
  • a pressure ring disk 36 is disposed in front of the flap 3 which is adjusted to the correct position by means of shoulder screws 37, 38 to permit substantially universal movement of face ring 59 as the face ring 39 is held between disk 36 and flap 31
  • the central portion of the flap 3?. and of the pressure ring disk 36 present a spherical surface 4% in the manner of a bearing shell which is engaged by the face ring 39 which presents a corresponding outer spherical surface 41.
  • the rockable face ring 39 can position itself evenly by means of the three beads d2, 43 and 4-4 against the front surface 45 of the bobbin case 46.
  • the face ring or rockablc member 39 is first placed in the flap 31, whereupon the ring disk 36 is placed on the other side and drawn up by means of screws 37, 3% in a manner that the face ring 39 is free to adapt itself with its beads 42, 43 and 44 to the surface 45 of the bobbin case 46.
  • An eccentric screw 48 is provided which is guided in the base 32 to provide sufiicient clearance for the thread to slide behind the bobbin case 46. Turning the screw 48 after loosening head screw 34 permits adjustment of the proper clearance. The head screw 34 is tightened again after correct adjustment is made. The head screw 34 is guided in a slot 47 of the base 32.
  • the face ring 39 is preferably madeof a noise suppressing substance, preferably one of the polyamides.
  • the bobbin case 46 is secured against rotating by means of a suitably shaped steel wire spring 49 which is secured to the flap 31 by means of head screw 53 and engages a corresponding slot in the bobbin case with its projecting end 51.
  • the arcuate shaping of this spring provides at the same time for elastic yielding in the slot of the bobbin case during sewing and contributes considerably to the noise suppression.
  • these pins 58, 59 extend. at right angles to the disk 36 and below the bobbin case. It the flap 31 is moved into the position shown in Fig. 6 these pins extend obliquely upward and the bobbin case rests likewise in oblique position on the face ring 39, supported by pins 58, 59.
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said fiap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said fiap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said flap in a manner permitting accurate seating of said retainer 0n the adjacent surface of said bobbin case.
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said flap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said flap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said bobbin case retainer defining a slot and an eccentric ball head screw being secured to said flap and having its ball head disposed in said slot for adjustment
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said flap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting screw means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said fiap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said retainer being made of a noise suppressing artificial material and including a metal insert provided with a thread to receive said other end of said connecting
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said flap and said bobbin case, said retainer and said fiap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said flap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said retainer being defined by an annular member presenting a spherical surface and said flap having a corresponding spherical
  • a bobbin supporting device of the type having a fiap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said flap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said fiap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said retainer being defined by an annular member presenting a spherical surface and said flap having a corresponding sp
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally of said retainer intermediate said flap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said fiap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said retainer being defined by an annular member presenting a spherical surface and said flap having a corresponding spherical
  • a bobbin supporting device of the type having a flap pivotally supported on a base proximate the lower peripheral portion of the bobbin case for pivotal movement relative thereto, said flap carrying a bobbin case retainer, means supporting said bobbin case retainer on said flap in nested relationship with said flap centrally I of said retainer intermediate said flap and said bobbin case, said retainer and said flap presenting spherical surfaces defining an adjustable joint therebetween, and connecting means presenting at one end a shoulder portion freely seated rearwardly of said flap and at the other end a portion extending freely through said flap and having firm engagement with said retainer to provide for sliding engagement between said spherical surfaces and supporting said retainer upon said flap in a manner permitting accurate seating of said retainer on the adjacent surface of said bobbin case, said retainer being defined by an annular member presenting one said spherical surface, said flap having an abutment conformation and said base

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US552880A 1954-12-17 1955-12-13 Bobbin supporting device Expired - Lifetime US2869496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP13224A DE1021693B (de) 1954-12-17 1954-12-17 Brillengreiferanordnung fuer Naehmaschinen

Publications (1)

Publication Number Publication Date
US2869496A true US2869496A (en) 1959-01-20

Family

ID=6699478

Family Applications (1)

Application Number Title Priority Date Filing Date
US552880A Expired - Lifetime US2869496A (en) 1954-12-17 1955-12-13 Bobbin supporting device

Country Status (5)

Country Link
US (1) US2869496A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE543710A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE1021693B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR1140487A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB788522A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539859A (en) * 1923-02-15 1925-06-02 Standard Sewing Machine Compan Bobbin-case latch for sewing machines
US2219308A (en) * 1939-04-24 1940-10-29 United Shoe Machinery Corp Wax thread sewing machine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE915059C (de) * 1950-05-16 1954-07-15 Betr Smittelbau G M B H Naehmaschine mit Stofftragarm und Brillengreifer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1539859A (en) * 1923-02-15 1925-06-02 Standard Sewing Machine Compan Bobbin-case latch for sewing machines
US2219308A (en) * 1939-04-24 1940-10-29 United Shoe Machinery Corp Wax thread sewing machine

Also Published As

Publication number Publication date
BE543710A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB788522A (en) 1958-01-02
FR1140487A (fr) 1957-07-23
DE1021693B (de) 1957-12-27

Similar Documents

Publication Publication Date Title
US2869496A (en) Bobbin supporting device
US2721604A (en) Adjustable tractor seat
US2567068A (en) Camera mounting or dolly
US2961213A (en) Adjustable lock for iris valve
US2378638A (en) Adjustable rotary operative fastener stud
US2347406A (en) Gun mounting
US2186751A (en) Attachment plug cap
US3090335A (en) Rotary hook for sewing machines
CN205085172U (zh) 检具的翻转卡板检测机构及检具
US2595424A (en) Angle computer and work holder
US2424025A (en) Sewing machine attachment
JPS5856635Y2 (ja) ミシン等の給油量調節装置
CN205091620U (zh) 悬臂结构
US2035621A (en) Circuit breaker
US2341201A (en) Contour cutting machine
JPS58163808A (ja) 軸の支持機構
US1953403A (en) Universally adjustable bearing box
US1645384A (en) Radiator cap
US1548348A (en) Headrest
JPS628690Y2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
US136184A (en) Improvement in adjustable nuts
JPS5811883Y2 (ja) ドアクロ−ザ−の開放保持装置
US1573856A (en) Truss pad
US918198A (en) Joint.
US1011401A (en) Saddle.