US3769925A - Loop taker lubrication for sewing machines - Google Patents

Loop taker lubrication for sewing machines Download PDF

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Publication number
US3769925A
US3769925A US00198377A US3769925DA US3769925A US 3769925 A US3769925 A US 3769925A US 00198377 A US00198377 A US 00198377A US 3769925D A US3769925D A US 3769925DA US 3769925 A US3769925 A US 3769925A
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US
United States
Prior art keywords
lubricant
loop taker
inlet
fan
drive shaft
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
US00198377A
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English (en)
Inventor
Hagen W Von
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.)
Union Special GmbH
Original Assignee
Union Special GmbH
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 Union Special GmbH filed Critical Union Special GmbH
Application granted granted Critical
Publication of US3769925A publication Critical patent/US3769925A/en
Assigned to BT COMMERCIAL CORPORATION reassignment BT COMMERCIAL CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: UNION SPECIAL CORPORATION
Assigned to UNION SPECIAL CORPORATION reassignment UNION SPECIAL CORPORATION RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BT COMMERCIAL CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B71/00—Lubricating or cooling devices

Definitions

  • the invention relates to a loop taker lubrication system for sewing machines of the general type disclosed in the application of Gunter Rohr, Ser. No. 1,000, entitled Loop Taker Lubrication System, now U.S. Pat. No. 3,624,763, granted Nov. 30, 1971.
  • the lubricant is fed into the channel by way of an annular groove in the exterior of the bolt and through-radial bores with the lubricant being supplied through the main shaft of the sewing machine from the normal lubricant supply thereof.
  • the loop taker will receive a quantity of lubricant which increases proportionately with the r.p.m. of the sewing machine and the quantity of the lubricant delivered to the loop taker can be regulated by the axial shifting of the bolt.
  • the lubricant is supplied under pressure to the channel in the bolt and reaches the intake stack of the fan through the channel.
  • this flow of lubricant is conveyed to the loop taker shaft or is centrifuged off by way of the fan.
  • the quantity of lubricant flowing to the loop taker in each adjusted position of the bolt changes in proportion to the r.p.m. of the machine.
  • FIG. 1 is a fragmentary vertical sectional view through a base of a sewing machine taken along the drive shaft for the loop taker.
  • FIG. 2 is a bottom plan view of the mechanism of FIG. 1, partially in section, with the usual bottom cover removed.
  • a base of a sewing machine 1 is provided with antifriction bearings for journalling a loop taker drive shaft 2 for rotation and for driving a conventional loop taker 3, in the conventional manner.
  • a main shaft 6 of the sewing machine drives the loop taker drive shaft 2 in a conventional manner through a drive gear 7 mounted on the main shaft 6 and a driven gear 5 secured to the loop taker drive shaft 2.
  • the loop taker drive shaft 2 is provided with a concentric bore 8 through which lubricant flows to the loop taker 3.
  • the bore 8 includes an inlet port 10.
  • the sewing machine 1 includes a fan 12 which is secured to the loop taker drive shaft 2 and which is provided with radial blades 13.
  • the fan 12 also has an axially extending intake opening or stack 14, the size of the inlet opening 14 being adjustable by the provision of a conical end 15 of an axially displaceable bolt 16 being located in the opening 14 in concentric relation thereto.
  • the bolt 16 is journaled for axial displacement in the base of the sewing machine 1 and includes an annular groove 17 into which engages an eccentrically arranged pin or stud l8 projecting from the end face of an adjusting shaft 19.
  • the bolt 16 is provided with an axial bore 21 opening at one end into a nozzle-likebore 22 in the conical end 15 of the bolt.
  • the other end of the bore 21 is closed by a plug 23.
  • the axial bore 21 is in communication with the annular groove 17 by means of radial bores 24.
  • the base of the sewing machine 1 is provided with a lubricant chamber 25 which is formed by a continuation of the bore receiving the adjusting shaft 19.
  • the lubricant chamber 25 extends to a bushing type bearing 26 for the main shaft 6.
  • the main shaft 6 of the sewing machine is provided in a conventional manner with an axial bore 27 which is in constant communication .with an annular groove 29 formed in the bearing 26 through radial bores 28 formed in the shaft 6.
  • a further radial bore 30 is formed in the bearing 26 and leads from the annular groove 29 into the lubricant chamber 25.
  • the radial bores 28 formed in the main shaft 6 of the sewing machine function as pump elements and centrifuge lubricants from the axial bore 27 into the annular groove 29.
  • the lubricant passes into the chamber 25 and moves from there through the bore or channel 21 and nozzle 22 into the intake stack or opening 14 of the fan 12.
  • Lubrication apparatus for a sewing machine comprising a loop taker driven by a loop taker drive shaft and said loop taker drive shaft having a bore therethrough for a lubricant, a fan carried by said loop taker drive shaft, said fan having an axial inlet and being of the radial discharge type, said loop taker drive shaft having an end terminating within said fan in alignment with said inlet and in the path of axial flow through said fan with said bore being positioned for forming a continuation of said inlet, an air flow controlling member positioned within said inlet, lubrication supply means for supplying lubricant into said inlet both to and around said loop taker driving shaft bore, said lubricant supply means including a lubricant supply passage opening axially through said air flow controlling member into said inlet with lubricant supplied thereby in part being received within said loop taker drive shaft bore and in part expelled radially by said fan, said air flow controlling member forming means for varying the flow of air into said inlet and the relative proportion of lubric
  • the lubrication apparatus of claim 1 together with adjusting means for axially adjusting the position of said air flow controlling member in said fan inlet to vary the flow of air into said inlet and thereby vary the relative proportion of lubricant flowing into said loop taker drive shaft and lubricant being expelled by said fan.
  • the lubrication apparatus of claim 4 wherein said sewing machine includes a main shaft, drive means connecting said loop taker drive shaft to said main shaft, and said lubricant supply means further includes said main shaft having supply means for supplying lubricant under pressure to said lubricant supply passage.
  • said lubricant supply means includes means for supplying lubricant to said supply passage under pressure and in accordance with the operating speed of said sewing machine.
  • lubrication apparatus of claim 9 wherein said lubricant supply means includes means for supplying lubricant to said supply passage under pressure and in accordance with the operating speed of said sewing machine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US00198377A 1970-11-25 1971-11-12 Loop taker lubrication for sewing machines Expired - Lifetime US3769925A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702057916 DE2057916A1 (de) 1970-11-25 1970-11-25 Greiferschmierung fuer Naehmaschinen

Publications (1)

Publication Number Publication Date
US3769925A true US3769925A (en) 1973-11-06

Family

ID=5789048

Family Applications (1)

Application Number Title Priority Date Filing Date
US00198377A Expired - Lifetime US3769925A (en) 1970-11-25 1971-11-12 Loop taker lubrication for sewing machines

Country Status (5)

Country Link
US (1) US3769925A (enExample)
DE (1) DE2057916A1 (enExample)
FR (1) FR2115994A6 (enExample)
GB (1) GB1339336A (enExample)
IT (1) IT988042B (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350105A (en) * 1979-07-12 1982-09-21 Pfaff Industriemaschinen Gmbh Sewing machine with a device for lubricating the looper
US4487143A (en) * 1983-05-25 1984-12-11 Axia Incorporated Self-oiling bag-closing sewing machine with improved lubrication system for drive shaft and feed dog assembly
US4577572A (en) * 1983-09-06 1986-03-25 Hirose Manufacturing Company Limited Fully rotating hook for a lock stitch sewing machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531362A (en) * 1948-04-13 1950-11-21 Singer Mfg Co Lubricating device for sewing machine loop takers
US2762325A (en) * 1953-12-29 1956-09-11 Union Special Machine Co Hook lubrication system for sewing machines
DE1902000A1 (de) * 1969-01-16 1970-08-27 Union Special Maschinenfab Greiferschmierung fuer Naehmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531362A (en) * 1948-04-13 1950-11-21 Singer Mfg Co Lubricating device for sewing machine loop takers
US2762325A (en) * 1953-12-29 1956-09-11 Union Special Machine Co Hook lubrication system for sewing machines
DE1902000A1 (de) * 1969-01-16 1970-08-27 Union Special Maschinenfab Greiferschmierung fuer Naehmaschinen
US3624763A (en) * 1969-01-16 1971-11-30 Union Special Maschinenfab Loop taker lubrication system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4350105A (en) * 1979-07-12 1982-09-21 Pfaff Industriemaschinen Gmbh Sewing machine with a device for lubricating the looper
US4487143A (en) * 1983-05-25 1984-12-11 Axia Incorporated Self-oiling bag-closing sewing machine with improved lubrication system for drive shaft and feed dog assembly
US4577572A (en) * 1983-09-06 1986-03-25 Hirose Manufacturing Company Limited Fully rotating hook for a lock stitch sewing machine
US4671196A (en) * 1983-09-06 1987-06-09 Hirose Manufacturing Company Limited Fully rotating hook for a lock stitch sewing machine
USRE32809E (en) * 1983-09-06 1988-12-27 Hirose Manufacturing Company Limited Fully rotating hook for a lock stitch sewing machine

Also Published As

Publication number Publication date
FR2115994A6 (enExample) 1972-07-07
DE2057916A1 (de) 1972-06-08
IT988042B (it) 1975-04-10
GB1339336A (en) 1973-12-05

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Legal Events

Date Code Title Description
AS Assignment

Owner name: BT COMMERCIAL CORPORATION, STATELESS

Free format text: SECURITY INTEREST;ASSIGNOR:UNION SPECIAL CORPORATION;REEL/FRAME:004610/0215

Effective date: 19851220

Owner name: BT COMMERCIAL CORPORATION

Free format text: SECURITY INTEREST;ASSIGNOR:UNION SPECIAL CORPORATION;REEL/FRAME:004610/0215

Effective date: 19851220

AS Assignment

Owner name: UNION SPECIAL CORPORATION

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BT COMMERCIAL CORPORATION;REEL/FRAME:004754/0102

Effective date: 19870707