US2879732A - Device for the automatic fixing of control cams on their shaft in a zig-zag stitch sewing machine - Google Patents

Device for the automatic fixing of control cams on their shaft in a zig-zag stitch sewing machine Download PDF

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Publication number
US2879732A
US2879732A US532930A US53293055A US2879732A US 2879732 A US2879732 A US 2879732A US 532930 A US532930 A US 532930A US 53293055 A US53293055 A US 53293055A US 2879732 A US2879732 A US 2879732A
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US
United States
Prior art keywords
cam
hub
shaft
ejector
cams
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
US532930A
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English (en)
Inventor
Casas-Robert Ramon
Fresard Marcel
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.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Application granted granted Critical
Publication of US2879732A publication Critical patent/US2879732A/en
Anticipated expiration legal-status Critical
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines

Definitions

  • the subject of the present invention is a device for the automatic fixing of control cams of a zig-zag stitch sewing machine, on their shaft for the lateral movements of the needle bar and those of the feeder, char acterized in that the cam shaft carries a support for the cams, said shaft having a hub on which the cams are placed, said hub comprising at least a spring locking member which recedes automatically into the hub whilst a cam is placed in position on the latter and coming into engagement with the central part of the cam, for maintaining it in position, when it is in position, a control member being located on the hub for controlling the withdrawal of the locking member against the action of its spring, for the purpose'of removing the cams.
  • Fig. l is a view in vertical section.
  • Fig. 2 is a view in perspective.
  • Fig. 3 is a view of a detail to a larger scale.
  • the cam-carrying shaft 1 is mounted in a support 2 adapted to be secured to the framework of the machine by screws 3.
  • Said shaft carries at its lower end a helicoidal wheel 4 gearing with a worm 5 mounted on the driving shaft 6 of the machine.
  • a cam support 7 provided with a hub 8 on which the cams 9 slide freely.
  • the cams 9 slide freely.
  • the two control cams form a single part, the cam A actuating the oscillating support of the needle bar through the medium of a lever 12, whilst the cam B actuates the feeder through the medium of a control shaft 13.
  • the device for securing the cams AB comprises three oscillating locking members 14, subjected to the action of springs and located in radial and longitudinal slots 16 of the hub 8.
  • Each member 14 is formed by a lever hinged at one of its ends, located in one of the Patentedv Mar. 31, 1959 2.
  • slots 16, to the hub, the other end thereof being urged, outwardly by a spring 15
  • the part of the lever 14 projecting from the slot 16 of the hub 8 has an inclined portion 17.
  • the arrangement is such that when one pair of cams AB is. placed on the hub 8, it comes into contact with the inclined part 17 of the'bolts 14 and repels them into the interior of the slots 16'until its lower face is in contact with that of the cam support 7. At this moment, the ends of the bolts come into engagement with the edge of the upper face of the pair of cams and hold it in position.
  • a control member is provided, formed by a sleeve 18 sliding freely on the hub and of whichv the edge comes into contact with the inclined portion 17 of the bolts.
  • a base' having in its central portion a depression with an opening. Through the latter passes freely the stem of a screw 19 screwed into the end of the shaft 1 and of which the head is sunk into the said depression.
  • cam means for automatically oscillating said needle bar and for automatically actuating said fecder'member, a cam shaft, a hub mounted about said cam shaft, said cam'means being mounted about said hub, and means for both automatically fixing said cam means about said hub and ejecting said cam means therefrom, said means including a cam ejector slidable axially with respect to said huh and said cam shaft, said cam ejector positioned about said hub and engaging the lower face of said cam means, said cam ejector member having a top portion annular with respect to the cam shaft, said top portion being spaced from the top surface of said hub, spring means positioned about said cam shaft between and engaging the top surface of said hub and the bottom surface of said top portion of said cam ejector for moving said cam ejector axially of said hub, at least one spring-loaded cam locking means pivotally mounted in the outer surface of said hub,
  • cam means for automatically oscillating said needle bar and forautomatically actuating said feeder member said cam means being operatively connected to both said needle bar and said feeder, a cam shaft support member, a cam shaft member on said cam shaft support member, a hub member mounted about said cam shaft member, said cam means being mounted about said hub member, said hub member hating a plurality of radially spaced longitudinal grooves on its outer surface and at least one radially spaced longitudinal slot therein, and means for both automatically fixing said cam means about said hub member and eject ing said cam means therefrom, said means being operatively associated with both said cam shaft member and said hub member, said means including a cam ejector member having a top portion annular with respect to the cam shaft member and radially spaced right angle arms each depending from said top portion and slidably engaging each of the said plurality of radially spaced longitudinal grooves on the outer surface of said hub memeaih of said.
  • cam locking means pivotally mounted in said radially spaced longitudinal slot for engaging said cam means, said cam locking means having a portion outwardly inclined with respect to the outer surface of said hub member, a sleeve member positioned about said hub member and the arms of said cam ejector member and operatively connected to said cam shaft member, said sleeve member being slidable axially of said hub member and said cam shaft member and said cam ejector member, the bottom edge of said sleeve member engaging said cam locking member at its outwardly inclined portion, whereby said springloaded cam locking member recedes into said hub slot while the cam means is positioned about the shaft memher and hub member and then engages said cam means to lock said cam means in position about said hub member and whereby said sleeve member, upon being actuated against said cam locking member, causes said locking member
  • cam means for automatically oscillating said needle bar and for automatically actuating said feeder member, a cam shaft, said cam means being mounted about and spaced from said shaft;
  • the improved means for both automatically fixing the cam means about and spaced from the shaft and ejecting the cam means therefrom including a hub mounted about said cam shaft, a cam ejector slidable axially with respect to the hub and cam shaft, said hub being positioned between said shaft and said cam means, said cam ejector being positioned about the hub and engaging the lower face of the cam means, said cam ejector member having a top portion annular with respect to the cam shaft, said top portion being spaced from the top surface of the hub, spring means positioned about the cam shaft between and engaging the top surface of the hub and the bottom surface of said top portion of said cam ejector for moving said cam ejector axially of said hub, at least one spring-loaded cam locking means pivotally
  • a zig-zagstitch sewing machine comprising a laterally oscillative needle bar, a feeder member, cam means for automatically oscillating said needle bar and for automatically actuating said feeder member, said cam means being operatively connected to both said needle bar and said feeder, a cam shaft member on said cam shaft support'member, said cam means being mounted about and spaced from said cam shaft; the improved means for both automatically fixing said cam means means therefrom including a cam, ejector having a top portion annular with respect to the camshaft member and radially spaced right angle arms each depending from said top portion, a hub member mounted about the cam shaft and positioned between said cam shaft and said cam means, said hub member having a plurality of radially spaced longitudinal grooves on its outer surface and at least one radially spaced longitudinal slot therein, said radially spaced right angle arms slidably engaging each of said plurality of radially spaced longitudinal grooves on the outer surface of said hub member, each of said right angle arms having an outwardly turned

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US532930A 1954-11-03 1955-09-07 Device for the automatic fixing of control cams on their shaft in a zig-zag stitch sewing machine Expired - Lifetime US2879732A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH779038X 1954-11-03

Publications (1)

Publication Number Publication Date
US2879732A true US2879732A (en) 1959-03-31

Family

ID=4536042

Family Applications (1)

Application Number Title Priority Date Filing Date
US532930A Expired - Lifetime US2879732A (en) 1954-11-03 1955-09-07 Device for the automatic fixing of control cams on their shaft in a zig-zag stitch sewing machine

Country Status (6)

Country Link
US (1) US2879732A (fr)
BE (1) BE539906A (fr)
CH (1) CH320267A (fr)
DE (1) DE953213C (fr)
FR (1) FR1128332A (fr)
GB (1) GB779038A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457887A (en) * 1967-02-07 1969-07-29 Singer Co Cam removing device for a sewing machine
US3628478A (en) * 1970-08-17 1971-12-21 Singer Co Mechanism for selectively retaining or removing an exchangeable pattern
US4178863A (en) * 1978-12-20 1979-12-18 The Singer Company Feed cam rephasing device
US5243923A (en) * 1991-08-09 1993-09-14 Husqvarna Sewing Machines Aktiebolag Zigzag setter with slider and coaxial controls and adjustor cams

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE552746A (fr) * 1955-12-20

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009371A (en) * 1934-06-12 1935-07-23 J E Reinecker A G Change gear mechanism
US2251470A (en) * 1939-08-04 1941-08-05 United Shoe Machinery Corp Rotary toolholder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2009371A (en) * 1934-06-12 1935-07-23 J E Reinecker A G Change gear mechanism
US2251470A (en) * 1939-08-04 1941-08-05 United Shoe Machinery Corp Rotary toolholder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457887A (en) * 1967-02-07 1969-07-29 Singer Co Cam removing device for a sewing machine
US3628478A (en) * 1970-08-17 1971-12-21 Singer Co Mechanism for selectively retaining or removing an exchangeable pattern
US4178863A (en) * 1978-12-20 1979-12-18 The Singer Company Feed cam rephasing device
US5243923A (en) * 1991-08-09 1993-09-14 Husqvarna Sewing Machines Aktiebolag Zigzag setter with slider and coaxial controls and adjustor cams

Also Published As

Publication number Publication date
FR1128332A (fr) 1957-01-04
CH320267A (fr) 1957-03-31
GB779038A (en) 1957-07-17
BE539906A (fr)
DE953213C (de) 1956-11-29

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