US3440987A - Throat plate raising attachments for sewing machines - Google Patents

Throat plate raising attachments for sewing machines Download PDF

Info

Publication number
US3440987A
US3440987A US633438A US3440987DA US3440987A US 3440987 A US3440987 A US 3440987A US 633438 A US633438 A US 633438A US 3440987D A US3440987D A US 3440987DA US 3440987 A US3440987 A US 3440987A
Authority
US
United States
Prior art keywords
throat plate
bed
shim
attachments
bed slide
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
US633438A
Inventor
Lionel J Coulombe
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.)
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Application granted granted Critical
Publication of US3440987A publication Critical patent/US3440987A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • a novel throat plate raising attachment for a sewing machine to render the feed mechanism thereof ineffective.
  • the attachment comprises a shim shiftably disposed across the slide way with at least one throat plate engaging projection extending outwardly therefrom. Closing of the opened bed slide will force the throat plate engaging projection under the throat plate to permit the shim to raise the throat plate above the feed mechanism.
  • An object of the present invention is to provide an improved throat plate raising device which overcomes the prior art disadvantages; which is simple, reliable, and economical; which is operated by the closing of the bed slide; which is an individual attachment; which is positively supported on and shiftable along a slideway to raise the throat plate without interfering with the operation of the loop forming means; which will raise the yieldably held throat plate sufficiently to render the feed mechanism inefiective; which will permit substantial uniform raising of the throat plate; which will enable the maintenance of a continuous substantially at working surface; which permits easy operator handling of said device.
  • FIGURE 1 is a plan view of the novel throat plate raising device disposed on the slideway of an open bed slide
  • FIGURE 2 is a plan view of the novel throat plate raising device, shown mostly in dotted lines, after it has been slid under the throat plate to raise the same on the closing of the bed slide,
  • FIGURE 3 is a sectional view taken along line 33 of FIGURE 2,
  • FIGURE 4 is an enlarged view, part in section, taken along line 44 of FIGURE 1,
  • FIGURE 5 is an enlarged view, part in section, taken along line 5-5 of FIGURE 2,
  • FIGURE 6 is an enlarged perspective view of the novel throat plate raising device.
  • the sewing machine shown may be of any conventional type using a yieldably held throat plate abutted by a bed slide.
  • FIGURES l-S the novel throat plate raising attachment designated generally as 10 is associated with a sewing machine having a bed 11 formed in a frame 12 in which is disposed a four motion feeding mechanism including a feedbar 14 to which is connected a feed dog 16.
  • the usual lift and drive mechanism is associated with the bar 14, only a part of which is shown by the drive bar 18.
  • a flat working surface 20 is formed at the top of bed 11 with the feed dog 16 being the only part of the feed mechanism that intermittently rises above the normal level of surface 20, the highest point of rising being shown in FIGURES 3, 4 and 5.
  • the bed 11 is provided with an opening 22 that is partially bounded by the feeding mechanism and has a centrally disposed loop forming means 24 of the stitch forming instrumentalities otherwise not shown.
  • a substantially U shaped recess ledge or slideway 26 is formed about opening 22 with the base thereof adjacent the dog 16.
  • a throat plate 28 covers the base end of the opening 22 and is partially supported by slideway 26 but principally supported by two bosses 30 and 32.
  • Throat plate 28 is provided with a needle aperture 34 and apertures 36, 38 and 40 through which the feed dog 16 intermittently extends.
  • a large headed positioning pin 42 illustrated best in FIGURE 3, is placed in hole 44 of boss 32.
  • a larger pin 46 is resiliently connected to the underside of boss 30 after passing through hole 48 therein.
  • a snap ring 50 is connected to the lower end of the shank of pin 46 and serves to hold a coil spring 52 in slight compression about the shank so as to urge pin 46 downwardly at all times.
  • Pin 46 has a large head 54 immediately below which is a shank portion 56 of reduced diameter.
  • Throat plate 28 has a substantially straight leading edge 58 and a slot 60 extending inwardly from one side thereof of a width slightly larger than the diameter of shank portion 56 but substantially smaller than head 54. Across from slot 60 throat plate 28 has a hole 52 of slightly larger diameter than the head of pin 42.
  • Throat plate 28 is yieldably connected to bed 11 by placing the slot 60 under head 54 so that shank portion 56 may pass therein on shifting of throat plate 28 across the slideway. Since pin 46 is yieldably held by spring 52 the mounting of throat plate 28 is readily accomplished. Once slot 60 has shank portion 66 therein hole 63 is disposed over the head of pin 42.
  • Leading edge 58 is beveled as at 64 on either side immediately above and overlaping slideway 26 for purposes more fully explained hereinafter.
  • a bed slide 66 having a straight forward face 68 is slideably disposed on slideway 26 to open or close the portion of opening 22 not covered by throat plate 28.
  • a suitable winged spring member 70 is connected to bed slide 66 to permit sliding movement thereof while preventing accidental removal of bed slide 66 from slideway 26.
  • the upper surface of the throat plate 28 and bed slide 66 is substantially at the same level as working surface 20 thus permitting feed dog 16 to function in the conventional manner. However, whenever it is desired to render the feed dog 16 ineffective the novel throat plate raising attachment may be used.
  • FIGURE 6 shows the novel throat plate raising attachment 10 which may be defined generally as a shim and including a base or transverse member 72 having projections or legs 74 and 76 extending outwardly from either end thereof.
  • the legs 74 and 76 may extend on one side of transverse member 72 to define a substantially U shaped shim 10; or extend on both sides of transverse member 72 so as to define the substantially H shaped shim 10 shown in the drawings.
  • Adjacent the legs 74 a web 78 is formed on transverse member 72 to permit a hole 80 to be formed therein, which hole 80 provides clearance for the passage of thread from loop forming means 24 during the sewing operation.
  • Leg 76 has bifurcated leading edges 82, 82 formed thereon to define a slot 84 of similar dimensions as slot 60.
  • the word UP may be stamped inwardly of the bifurcated edges 82 as shown only in FIGURE 6.
  • Each of the leg edges has a taper 86 with a thickness that decreases in a downwardly and outwardly direction away from transverse member 72.
  • Shim 10 lies in a single plane except for a substantially perpendicular flat upturned portion or flange 88 formed at the rear of transverse member 72 that terminates in a flat upper edge 90.
  • Flange 88 may serve as gripping means, and extends substantially the length of transverse member 72 terminating a short distance before legs 74 and 86.
  • Leading edge 82, forward face 68 and flange 88 will be parallel to each other when placed on slideway 26. Also the total height of flange 88 is approximately twice the thickness of shim 10.
  • shim 10 Whenever the operator desires to perform such sewing functions as darning or embroidering shim 10 will be placed under throat plate 28 so as to raise throat plate 28 an amount equal to the thlCkneSs of shim 10 or approximately .045 inch, which is higher than the maximum rise of feed dog 16. This may be accomplished by opening bed slide 66 as shown in FIGURES 1 and 4. The width of shim 10 is substantially equal to the width of bed slide 66. After opening bed slide 66, shim 10 is placed on slideway 26 in the UP position with the and force the same to rise as shown in FIGURES 2, 3 and 5. The throat plate 28 rises simultaneously at three 66 so as to form a continuous fiat surface. The cooperating bevel 64 and taper 86 facilitate insertion of shim 10 under throat plate 28.
  • An attachment throat plate and bed slide raising device for use with a sewing macine having a bed in which a throat plate and a bed slide span a bed opening and are mounted across oppositely facing recessed ledges at each side of said opening to cover a portion of a feed mechanism and loop forming means and to form part of a flat work supporting surface along which work is fed in a prescribed line, the attachment is adapted to e placed across said ledge upon opening of the bed slide and comprises:
  • each of the legs having a front portion and a back portion extending outwardly in opposite directions away from the base member
  • the means for enhancing is a taper at the outermost extremities of the legs.
  • a web extends between one of said base member and an opening formed wherein: legs and said in said web.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

A ril 29, 1969 1.. J. COULOMBE I THROAT PLATE RAISING ATTACHMENTS FOR SEWING MACHINES Filed April 25, 1967 Sheet INVENTOR. Llonel J. Coulombe RNEY WITNESS:
April 29, 1969 1.. J. COULOMBE THROAT PLATE RAISING ATTACHMENTS FOR SEWING MACHINES Filed April 25, 1967 Sheet INVENTOR. Llonel J. Coulombe ATS ORNEY WITNESS: oleicb' m w g United States Patent US. Cl. 112-260 3 Claims ABSTRACT OF THE DISCLOSURE A throat plate raising attachment for a sewing machine comprising a shim that is slideably disposed in the slideway of the bed slide, the closing of which will force the shim under the throat plate to raise the same above the feed mechanism to enable the machine to be used for such sewing operations as darning or embroidering.
Background of the invention Summary of the invention In accordance with the present invention a novel throat plate raising attachment is provided for a sewing machine to render the feed mechanism thereof ineffective. The attachment comprises a shim shiftably disposed across the slide way with at least one throat plate engaging projection extending outwardly therefrom. Closing of the opened bed slide will force the throat plate engaging projection under the throat plate to permit the shim to raise the throat plate above the feed mechanism.
An object of the present invention is to provide an improved throat plate raising device which overcomes the prior art disadvantages; which is simple, reliable, and economical; which is operated by the closing of the bed slide; which is an individual attachment; which is positively supported on and shiftable along a slideway to raise the throat plate without interfering with the operation of the loop forming means; which will raise the yieldably held throat plate sufficiently to render the feed mechanism inefiective; which will permit substantial uniform raising of the throat plate; which will enable the maintenance of a continuous substantially at working surface; which permits easy operator handling of said device.
Other objects and advantages will be apparent from the following description of one embodiment of the invention and the novel features will be particularly pointed out hereinafter in the claims.
Brief description of the drawings This invention is illustrated in the accompanying drawings in which:
FIGURE 1 is a plan view of the novel throat plate raising device disposed on the slideway of an open bed slide,
FIGURE 2 is a plan view of the novel throat plate raising device, shown mostly in dotted lines, after it has been slid under the throat plate to raise the same on the closing of the bed slide,
3,440,987 Patented Apr. 29, 1969 FIGURE 3 is a sectional view taken along line 33 of FIGURE 2,
FIGURE 4 is an enlarged view, part in section, taken along line 44 of FIGURE 1,
FIGURE 5 is an enlarged view, part in section, taken along line 5-5 of FIGURE 2,
FIGURE 6 is an enlarged perspective view of the novel throat plate raising device.
Description of the invention In the illustrated embodiment of the invention the sewing machine shown may be of any conventional type using a yieldably held throat plate abutted by a bed slide.
In FIGURES l-S the novel throat plate raising attachment designated generally as 10 is associated with a sewing machine having a bed 11 formed in a frame 12 in which is disposed a four motion feeding mechanism including a feedbar 14 to which is connected a feed dog 16. The usual lift and drive mechanism is associated with the bar 14, only a part of which is shown by the drive bar 18. A flat working surface 20 is formed at the top of bed 11 with the feed dog 16 being the only part of the feed mechanism that intermittently rises above the normal level of surface 20, the highest point of rising being shown in FIGURES 3, 4 and 5.
The bed 11 is provided with an opening 22 that is partially bounded by the feeding mechanism and has a centrally disposed loop forming means 24 of the stitch forming instrumentalities otherwise not shown. A substantially U shaped recess ledge or slideway 26 is formed about opening 22 with the base thereof adjacent the dog 16. A throat plate 28 covers the base end of the opening 22 and is partially supported by slideway 26 but principally supported by two bosses 30 and 32. Throat plate 28 is provided with a needle aperture 34 and apertures 36, 38 and 40 through which the feed dog 16 intermittently extends.
A large headed positioning pin 42, illustrated best in FIGURE 3, is placed in hole 44 of boss 32. A larger pin 46 is resiliently connected to the underside of boss 30 after passing through hole 48 therein. A snap ring 50 is connected to the lower end of the shank of pin 46 and serves to hold a coil spring 52 in slight compression about the shank so as to urge pin 46 downwardly at all times. Pin 46 has a large head 54 immediately below which is a shank portion 56 of reduced diameter. Throat plate 28 has a substantially straight leading edge 58 and a slot 60 extending inwardly from one side thereof of a width slightly larger than the diameter of shank portion 56 but substantially smaller than head 54. Across from slot 60 throat plate 28 has a hole 52 of slightly larger diameter than the head of pin 42.
Throat plate 28 is yieldably connected to bed 11 by placing the slot 60 under head 54 so that shank portion 56 may pass therein on shifting of throat plate 28 across the slideway. Since pin 46 is yieldably held by spring 52 the mounting of throat plate 28 is readily accomplished. Once slot 60 has shank portion 66 therein hole 63 is disposed over the head of pin 42.
Leading edge 58 is beveled as at 64 on either side immediately above and overlaping slideway 26 for purposes more fully explained hereinafter. A bed slide 66 having a straight forward face 68 is slideably disposed on slideway 26 to open or close the portion of opening 22 not covered by throat plate 28. A suitable winged spring member 70 is connected to bed slide 66 to permit sliding movement thereof while preventing accidental removal of bed slide 66 from slideway 26.
Normally, the upper surface of the throat plate 28 and bed slide 66 is substantially at the same level as working surface 20 thus permitting feed dog 16 to function in the conventional manner. However, whenever it is desired to render the feed dog 16 ineffective the novel throat plate raising attachment may be used.
FIGURE 6 shows the novel throat plate raising attachment 10 which may be defined generally as a shim and including a base or transverse member 72 having projections or legs 74 and 76 extending outwardly from either end thereof. The legs 74 and 76 may extend on one side of transverse member 72 to define a substantially U shaped shim 10; or extend on both sides of transverse member 72 so as to define the substantially H shaped shim 10 shown in the drawings. Adjacent the legs 74 a web 78 is formed on transverse member 72 to permit a hole 80 to be formed therein, which hole 80 provides clearance for the passage of thread from loop forming means 24 during the sewing operation. Leg 76 has bifurcated leading edges 82, 82 formed thereon to define a slot 84 of similar dimensions as slot 60. To prevent shim 10 from being incorrectly positioned the word UP may be stamped inwardly of the bifurcated edges 82 as shown only in FIGURE 6. Each of the leg edges has a taper 86 with a thickness that decreases in a downwardly and outwardly direction away from transverse member 72. Shim 10 lies in a single plane except for a substantially perpendicular flat upturned portion or flange 88 formed at the rear of transverse member 72 that terminates in a flat upper edge 90. Flange 88 may serve as gripping means, and extends substantially the length of transverse member 72 terminating a short distance before legs 74 and 86. Leading edge 82, forward face 68 and flange 88 will be parallel to each other when placed on slideway 26. Also the total height of flange 88 is approximately twice the thickness of shim 10.
Whenever the operator desires to perform such sewing functions as darning or embroidering shim 10 will be placed under throat plate 28 so as to raise throat plate 28 an amount equal to the thlCkneSs of shim 10 or approximately .045 inch, which is higher than the maximum rise of feed dog 16. This may be accomplished by opening bed slide 66 as shown in FIGURES 1 and 4. The width of shim 10 is substantially equal to the width of bed slide 66. After opening bed slide 66, shim 10 is placed on slideway 26 in the UP position with the and force the same to rise as shown in FIGURES 2, 3 and 5. The throat plate 28 rises simultaneously at three 66 so as to form a continuous fiat surface. The cooperating bevel 64 and taper 86 facilitate insertion of shim 10 under throat plate 28.
It will be understood that various changes in the details, materials, arrangements of parts and operating conditions which have been herein described and illustrated in order to explain the nature of the invention may be made by those skilled in the art within the principles and scope of the invention as expressed in the claims.
Having thus set forth the nature of the invention, what I claim herein is:
1. An attachment throat plate and bed slide raising device for use with a sewing macine having a bed in which a throat plate and a bed slide span a bed opening and are mounted across oppositely facing recessed ledges at each side of said opening to cover a portion of a feed mechanism and loop forming means and to form part of a flat work supporting surface along which work is fed in a prescribed line, the attachment is adapted to e placed across said ledge upon opening of the bed slide and comprises:
(a) an elongated base member having a length adapted to span said bed opening and to extend between the ledges upon retraction of the bed slide,
(b) a pair of legs integrally formed on opposite ends of the base member and adapted to be separately carried by the opposite ledges parallel to the line of feed,
(c) each of the legs having a front portion and a back portion extending outwardly in opposite directions away from the base member,
(d) one edge of the base member having an upturned portion in a plane perpendicular to said legs and extending above the top surface of said base member a predetermined amount which does not exceed the thickness of the throat plate or bed slide,
(e) means for enhancing the insertion of the legs 'beneath the throat plate and bed slide,
(f) the upturned edge adapted to 'be abutted by the bed slide upon the closing thereof whereby the throat plate and the bed slide each can be raised an equal amount along a line parallel to the line of feed to maintain a substantially smooth Work supporting surface.
2. The combination claimed in claim 1 wherein:
(a) the means for enhancing is a taper at the outermost extremities of the legs.
3. The combination claimed in claim 1 (a) a web extends between one of said base member and an opening formed wherein: legs and said in said web.
References Cited UNITED STATES PATENTS 2,808,797 10/1957 Ayres 112260 2,911,929 11/1959 Caldwell FOREIGN PATENTS 241,569 12/1911 Germany.
US633438A 1967-04-25 1967-04-25 Throat plate raising attachments for sewing machines Expired - Lifetime US3440987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US63343867A 1967-04-25 1967-04-25

Publications (1)

Publication Number Publication Date
US3440987A true US3440987A (en) 1969-04-29

Family

ID=24539631

Family Applications (1)

Application Number Title Priority Date Filing Date
US633438A Expired - Lifetime US3440987A (en) 1967-04-25 1967-04-25 Throat plate raising attachments for sewing machines

Country Status (1)

Country Link
US (1) US3440987A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269129A (en) * 1979-08-06 1981-05-26 The Singer Company Retractable retaining device for sewing machine support plate
US4646665A (en) * 1984-09-04 1987-03-03 Mefina S.A. Cover for a loop catch mechanism of a sewing machine
US4694763A (en) * 1980-08-20 1987-09-22 Ssmc Inc. Sewing machine bed slide retention
US4876975A (en) * 1987-07-24 1989-10-31 Pfaff Industriemaschinen Gmbh Sewing machine with a needle plate insert
US5596942A (en) * 1993-09-21 1997-01-28 The Singer Company N.V. Feeding support for a sewn product
US7267062B1 (en) * 2005-08-31 2007-09-11 Cyp Technologies, Llc Adjustable pile height mechanism and method for adjusting the pile height of a tufted floor covering

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241569C (en) *
US2808797A (en) * 1955-01-19 1957-10-08 White Sewing Machine Corp Needle plate latch
US2911929A (en) * 1958-04-01 1959-11-10 Greist Mfg Co Feed dog cover for zigzag and like attachments

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE241569C (en) *
US2808797A (en) * 1955-01-19 1957-10-08 White Sewing Machine Corp Needle plate latch
US2911929A (en) * 1958-04-01 1959-11-10 Greist Mfg Co Feed dog cover for zigzag and like attachments

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4269129A (en) * 1979-08-06 1981-05-26 The Singer Company Retractable retaining device for sewing machine support plate
US4694763A (en) * 1980-08-20 1987-09-22 Ssmc Inc. Sewing machine bed slide retention
US4646665A (en) * 1984-09-04 1987-03-03 Mefina S.A. Cover for a loop catch mechanism of a sewing machine
US4876975A (en) * 1987-07-24 1989-10-31 Pfaff Industriemaschinen Gmbh Sewing machine with a needle plate insert
US5596942A (en) * 1993-09-21 1997-01-28 The Singer Company N.V. Feeding support for a sewn product
US7267062B1 (en) * 2005-08-31 2007-09-11 Cyp Technologies, Llc Adjustable pile height mechanism and method for adjusting the pile height of a tufted floor covering

Similar Documents

Publication Publication Date Title
US3440987A (en) Throat plate raising attachments for sewing machines
US4356781A (en) Thread handling arrangement for sewing machines
US2836134A (en) Loop guard for tufting machine
US2955552A (en) Sewing machine
US3125049A (en) Sewing machine
US3517631A (en) Needle threader
US3046918A (en) Circular stitching device for sewing machines
US3060878A (en) Sewing machine throat plate fastening means
US4437421A (en) Variable pull off for bobbin thread
JPH0532068Y2 (en)
US5050514A (en) Satin stitch presser foot having thread and fabric guides
US2911929A (en) Feed dog cover for zigzag and like attachments
US3415210A (en) Attachment for sewing machines
US2642022A (en) Darning attachment for sewing machines
US2355904A (en) Blind-stitch sewing machine
US4183311A (en) Snap-on presser foot plate
US1966870A (en) Workholder for sewing machines
US1726450A (en) Darner foot for sewing machines
US2871808A (en) Sewing machine spool-pin supports
US2841105A (en) Sewing machines
US3047193A (en) Article feeding device
US2652798A (en) Needle stripper foot for sewing machines
US2573146A (en) Cloth-holding device for buttonhole attachments
US2095080A (en) Embroidering and cording attachment for sewing machines
US4308813A (en) Device for forming a hem on fabric edges with the use of a sewing machine