US2488052A - Shuttle for sewing machines - Google Patents

Shuttle for sewing machines Download PDF

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Publication number
US2488052A
US2488052A US574661A US57466145A US2488052A US 2488052 A US2488052 A US 2488052A US 574661 A US574661 A US 574661A US 57466145 A US57466145 A US 57466145A US 2488052 A US2488052 A US 2488052A
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US
United States
Prior art keywords
thread
shuttle
pressure
spring
cam
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
US574661A
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English (en)
Inventor
Robert Ramon Casas
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 US2488052A publication Critical patent/US2488052A/en
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
    • 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
    • D05B57/143—Vertical axis type
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2205/00—Interface between the operator and the machine
    • D05D2205/12—Machine to the operator; Alarms
    • D05D2205/16—Display arrangements

Definitions

  • Thisinvention is directed to a shuttle for a sewing. .machine provided. with .a device for ten. sioning of the thread enabling the modification ofsthe traction to ⁇ beexerted ⁇ on the thread during vthe unwinding.
  • the tension-j ing' deviceV generally comprises an 'adjustable ele- ⁇ l ment cooperating with avisual indicator enabling the-marking of its position.
  • the displacement. ofrthis adjustable element eiects through the intermediary of transmission elements, a modication of the pressure of an elastic element acting on the thread in a manner to modify the valueof. .the traction to. be. exerted on it ,during its unwinding.
  • the present invention has for its object a shuttle for sewing machines ofthe above mentioned type and which tends tol eliminate the dis-L advantages mentioned, because the tensioning device has an adjustable element provided in the chain of elementsconnecting the adjustable operating element to the elasticelement, the adjusting-element. being disposed in. a manner to permit a correction of thepressure ofV the elastic element for a given position of the indicator and ofi the calibration of this pressure to the desired value. for the zero of the indicator.
  • Fig. Al is a ,perspective View partly in section
  • Fig. 2 ⁇ is a perspective viewof all the individual parts constituting the regulating device
  • Fig. 3 is a plan-view on an increased scale of a ⁇ part of the shuttle with the regulating device mounted in, place; Y
  • Figqi is a plan View of an-alternative form of construction of: one of the parts of the regulating device. ⁇
  • the shuttle shown is ofthe. rotative type arranged about a horizontal axis, performing twoy revolutions ⁇ for each single stitch, It consists chiefly of a movable part of generallycylindrical shape provided 'with a hook
  • the movablepart H is provided withv a cylindrical rim I8 and two collar-surfaces i9y and. 2i)Y serving as guiding surfaces for the part maintained in a stationary position.
  • the collar I3 is provided with a cylindrical crown 2
  • the regulating device of the tension of the shuttle-thread comprises the following parts:
  • This pressure-platafis, A provided with a hole 25, a slot ⁇ v26, the twov ends 21- and 28 being bent back in order to become engaged in the two openings, 29 and3
  • provided with an opening 32 and having one extremity bent back in such, a. mannerY as; to be held in place by the hole 3D" of the crown 2
  • a lever 33 is provided with a cylindrical hole 34. One end of this lever is curved to forma ngershape cam followerv 35'. The other. end of this 'lever' is -bent downwards as shown at. 36 and engages'with a slot 3l provided in the flangey 22. Because of this bent-down part 36 of the lever, the loop of the needle-thread which ,formsy around the. ⁇ shuttle, cannot become hooked toy this lever. Furthermore, the leverv 33 is provided with a tongue 38, which penetrates the openings 25 and 32A and engages with a slot 39 provided in the crown '2 l, thus assuring the respective positions in the-vertical direction of' the three pieces 24, 3
  • An eccentric regulating device 40 formed of a cylindrical body 4
  • is provided with a slot 45 suitable for inserting a screwdriver and for-holding a spring 46, the latter having a U-shape and being made of piano-wire. This spring -is intended for becoming engaged with:
  • In assembling the spring 46 in the slot 45 of the cylinder 4
  • a regulating cam 48 is provided which is y formed of an upper plate 49, an intermediate cylindrical part 50 of reduced diameter intended for turning in a hole 5
  • the upper plate is provided with a screw-driver slot and the shape of its circumference is a curve with increasing diameters. It is provided with marks which may be completed with markingnumbers (viz. Fig. 3).
  • the Figures 1 and 3 indicate how the diierent elements of the regulating device for regulating the tension of the shuttle-thread are assembled.
  • the lever 33 pivoting around the eccentric pivot 44, bears against the contour of the regulating cam 48 by means of its cam followers 35 and compresses with its other end the pressure spring 3
  • the shuttle-thread 54 coming oi the bobbinreel
  • the pressure-plate 24 bears against the length of thread between the oblique slot 55 and the slot 26.
  • the tension applied to the shuttlethread results from the friction which it encounters over the distance between the two slots and it is a function of the pressure applied upon plate 24 by the spring 3
  • the regulating cam When assembling the regulating device, the regulating cam is placed in the 0position, Viz. that the mark 0 is brought face to face with the nger 35.
  • engaging with one of its ends in the opening 30, acts upon the lever and tends to maintain its finger 35 against the regulating-cam.
  • the regulating cam 48 being placed in an angular position corresponding to zero on its scale, the eccentric 4
  • the shuttle-thread suffers a minimum of friction over its course through the regulating device and as a result thereof, its tension is very weak. If the cam is turned in a clockwise direction such as to reach successively one of the positions 1, 2 and 3, the lever compresses in an increasing manner the pressure spring 3
  • the visual indicating device described and which is provided with marks simplies the use of the sewing-machine due to the fact, that it enables the user to set the regulating device to its most favorable position for each kind of thread and for each kind of needle-work and gives the user the possibility to reset this same and most favorable regulation-position each time the same thread for the same needle-work is again used.
  • the regulating device as well as the visual indicator being located on the upper face of the flange 22, they are accessible from the exterior of the sewing-machine across the opening which permits of placing the bobbin-reel into the shuttle.
  • the regulation of the tension of the shuttle-thread and the control of this tension by means of the marks of the regulating cam constituting the visual indicator are therefore possible without necessitating the dismantling of the shuttle.
  • the circumference of this cam may be provided with a series of notches 51 engaging with the finger 35 of the regulating lever (Fig. 4).
  • the device described has the advantage over all known devices, of enabling a calibration of the pressure of the elastic element and, therefore, an adjustment of the tension to be exerted on the thread during its unwinding.
  • the rigid pressure-plate may be replaced by an elastic piece. This latter may constitute the spring which determines the elastic tension acting upon the thread.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, two adjusting devices cooperating for varying the pressure exerted by the spring, and visual indicating means associated with one of said adjusting devices.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, two adjusting devices cooperating for varying the pressure exerted by the spring, visual indicating means as sociated with one of said adjusting devices, and resilient retaining means associated with the other adjusting device.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, and means for adjusting the pressure exerted by said spring including a lever having three load bearing points, one of said load bearing points being associated with said spring pressed member, and adjustable Y supports cooperating with the other two of said load bearing points of the lever, one of said adjustable supports having visual indicating means associated therewith.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, and means for adjusting the pressure exerted by said spring including a lever having three load bearing points, one of said load bearing points being associated with said spring pressed member, and adjustable supports cooperating with the other two of said load bearing points of the lever, one of said adjustable supports having visual indicating means associated therewith, said adjustable supports including eccentric cams.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, and means for adjusting the pressure exerted by said spring including a lever having three load bearing points, one of said load bearing points being associated with said spring pressed member, and adjustable supports cooperating with the other two of said load bearing points of the lever, one of said adjustable supports having visual indicating means associated therewith, said adjustable supports including eccentric cams, and the indicating means being formed on the respective cam and having at least one reference mark thereon for indicating the angular position of the cam.
  • a sewing machine shuttle comprising a casing for receiving a bobbin, and a thread tensioning device on said casing including a spring pressed thread engaging member, two adjusting devices cooperating for varying the pressure eX-v erted by the spring, and visual indicating means associated with one of said adjusting devices, said spring pressed thread engaging member including a rigid thread engaging shoe.
  • a shuttle for a sewing machine provided with a thread tensioning device comprising a control element with a visual position indicator, a thread engaging member, a lspring for pressing said thread engaging member against a thread, transmission means interposed between said control element and said spring to transmit to said spring variations in the control element to vary the pressure exerted by the spring on the thread engaging member, and means associated with said transmission means to vary the pressure exerted by the spring on the thread engaging member for any given position of said control element.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US574661A 1944-01-27 1945-01-26 Shuttle for sewing machines Expired - Lifetime US2488052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2488052X 1944-01-27

Publications (1)

Publication Number Publication Date
US2488052A true US2488052A (en) 1949-11-15

Family

ID=4569586

Family Applications (1)

Application Number Title Priority Date Filing Date
US574661A Expired - Lifetime US2488052A (en) 1944-01-27 1945-01-26 Shuttle for sewing machines

Country Status (2)

Country Link
US (1) US2488052A (fr)
FR (1) FR909990A (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2742008A (en) * 1953-06-15 1956-04-17 Singer Mfg Co Bobbin-thread cases
US2746408A (en) * 1954-01-25 1956-05-22 White Sewing Machine Corp Sewing machine
DE959791C (de) * 1952-03-22 1957-03-14 W Messerschmitt Dr Ing Greifergehaeuse fuer Naehmaschinen
US2836136A (en) * 1951-09-13 1958-05-27 White Sewing Machine Corp Thread tensioning means for sewing machine bobbin case
US2848965A (en) * 1954-01-25 1958-08-26 White Sewing Machine Corp Sewing machine
US3381642A (en) * 1964-07-31 1968-05-07 Necchi Spa Bobbin case holder for sewing machines
US3570429A (en) * 1968-04-18 1971-03-16 Mefina Sa Thread guide for a rotary-hook-type sewing machine
DE2353335A1 (de) * 1972-10-24 1974-05-02 Manta Fa Rundgreifer fuer naehmaschinen
US4299181A (en) * 1979-12-06 1981-11-10 The Singer Company Bobbin thread tension device
US4542706A (en) * 1982-12-23 1985-09-24 Janome Sewing Machine Industry Co., Ltd. Lower thread tension adjusting device of sewing machine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US58399A (en) * 1866-10-02 Improvement in sewing-machine shuttles
US2181951A (en) * 1936-06-17 1939-12-05 Schenzinger August Shuttle mechanism for ring shuttle sewing machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US58399A (en) * 1866-10-02 Improvement in sewing-machine shuttles
US2181951A (en) * 1936-06-17 1939-12-05 Schenzinger August Shuttle mechanism for ring shuttle sewing machines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836136A (en) * 1951-09-13 1958-05-27 White Sewing Machine Corp Thread tensioning means for sewing machine bobbin case
DE959791C (de) * 1952-03-22 1957-03-14 W Messerschmitt Dr Ing Greifergehaeuse fuer Naehmaschinen
US2742008A (en) * 1953-06-15 1956-04-17 Singer Mfg Co Bobbin-thread cases
US2746408A (en) * 1954-01-25 1956-05-22 White Sewing Machine Corp Sewing machine
US2848965A (en) * 1954-01-25 1958-08-26 White Sewing Machine Corp Sewing machine
US3381642A (en) * 1964-07-31 1968-05-07 Necchi Spa Bobbin case holder for sewing machines
US3570429A (en) * 1968-04-18 1971-03-16 Mefina Sa Thread guide for a rotary-hook-type sewing machine
DE2353335A1 (de) * 1972-10-24 1974-05-02 Manta Fa Rundgreifer fuer naehmaschinen
US4299181A (en) * 1979-12-06 1981-11-10 The Singer Company Bobbin thread tension device
US4542706A (en) * 1982-12-23 1985-09-24 Janome Sewing Machine Industry Co., Ltd. Lower thread tension adjusting device of sewing machine

Also Published As

Publication number Publication date
FR909990A (fr) 1946-05-23

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