US2985127A - Means for mounting the presser foot on sewing machines - Google Patents

Means for mounting the presser foot on sewing machines Download PDF

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Publication number
US2985127A
US2985127A US755519A US75551958A US2985127A US 2985127 A US2985127 A US 2985127A US 755519 A US755519 A US 755519A US 75551958 A US75551958 A US 75551958A US 2985127 A US2985127 A US 2985127A
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US
United States
Prior art keywords
latch
bore
presser foot
lever
support member
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
US755519A
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English (en)
Inventor
Reeber Rudolf
Mall Gunther
Seewald Gerhard
Schonthaler Rubi
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GM Pfaff AG
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GM Pfaff AG
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 GM Pfaff AG filed Critical GM Pfaff AG
Application granted granted Critical
Publication of US2985127A publication Critical patent/US2985127A/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
    • D05B29/00—Pressers; Presser feet
    • D05B29/12—Presser-foot attachment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B39/14—Guiding, positioning or aligning work
    • B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
    • B21B39/165—Guides or guide rollers for rods, bars, rounds, tubes ; Aligning guides

Definitions

  • This invention relates to sewing machines and more particularly to means for mounting the presser foot upon the presser bar of a sewing machine.
  • the presser foot is secured to the presser bar by means of a clamping connection. If a knurled clamping screw is used for this purpose the connection between the presser foot and the presser bar can be established and released without a screw driver being required. However, the strength of the fingers of the seamstress is not sufiicient in all cases for securing the presser foot safely without the aid of a tool.
  • the invention is based on known arrangements where the presser foot is secured to the presser bar by means of a special mounting which is readily releasable.
  • the support member is provided with a rotation opposing cylindrical guide slot extending in the direction of sewing and spring biased latch means, which are self-locking by virtue of wedge action, for a guide member on the shank of the presser foot formed to correspond to and slidingly received in the guide slot in its position which is determined by an abutment.
  • the expression cylindrical guide slot is intended to mean a guiding surface which comprises parallel lines.
  • the latching means is considered to be self-locking by virtue of the fact that frictional forces are developed under a load which are greater than the load and oppose the same.
  • a rotatable latch is provided having its axis of rotation disposed perpendicularly to the axis of the guide means and the engagement planes of the rotary latch and of the guide member have as their generatrixes lines which are parallel to the axis of rotation of the rotary latch so that they engage one another along lines or linearly.
  • the guide means with a partial cylindrical bore adapted to receive a rotatable cylinder having a part serving as rotary latch extending through the guide means and which is recessed in such a manner that in its operative position it wedges the guide member of the presser foot in place while in its inoperative position it frees the cross sectional area of the guide means.
  • a two legged spring may be provided having one leg in a groove of a shoulder of the mounting and retaining the rotatable cylinder in its bearing by engaging the same with its side while its other leg applies pressure in the direction of locking upon one arm of a double armed release lever which is secured to the rotary cylinder and which by' abutting the shoulder at the same time limits the angular displacement or rotation of the rotary cylinder in both directions.
  • the spring serves also simultaneously as the fastening element for the rotary latch.
  • Fig. 1 is a perspective view of the presser foot secured to the presser bar
  • Fig. 2 is an exploded view of the parts of the embodiment in accordance with Fig. 1,
  • Figs. 3 to 5 illustrate subsequent positions of the guide member while being inserted into the mounting which is illustrated in a cross section taken along the axis of the guiding means
  • Fig. 6 is an illustration similar to Figs. 3 to 5 with the guide member unlatched
  • Fig. 7 is a greatly enlarged view of a section of Fig. 5;
  • Fig. 8 illustrates a second embodiment of the mounting; means partly in section along the axis of the guiding means with the guide member inserted half way, and
  • Fig. 9 is a view of the embodiment similar to Fig. 81
  • a support member 3 is secured to the lower end of thepresser bar 1 by means of a screw 2 the construction of which can best be seen in Fig. 2.
  • the support member 3 is provided with two cylindrical bores 4 and 5 which partly intersect one another.
  • the bore 4 connects with a slot 6 defined by vertical planes and which is open at the bottom.
  • the bore 5 is adapted to receive a rotatable cylinder 7 having a portion 8 which extends through the bore 4 and which is recessed as illustrated particularly in Figs. 2 and 7.
  • a double armed release lever 9 and a retaining pin 10 are securely fastened to the rotatable cylinder 7.
  • the pin retains a two legged spring 11 one leg 12 of which rests in a groove 13 against a shoulder 14 of the support member 3.
  • the other leg 15 presses against the arm 16 of the release lever 9 tending to rotate the same together with the rotary cylinder 7 in counter-clockwise direction.
  • the angular movement of the rotatable cylinder 7 is limited in both directions by the release lever 9 abutting the shoulder 14.
  • the spring 11 by laterally engaging rotatable cylinder 7 causes the same to be retained in the bore 5.
  • the cylindrical bore 4 and the slot 6 form in combination a cylindrical guide slot, which prevents rotation and extends inthe direction of sewing, for a cylindrical guide member 19 provided on the shank 17 of the presser foot 18.
  • This guide member 19 is slidingly received from the rear in the bore 4 while the vertical side planes 20 of the shank 17 are guided by the walls of slot 6.
  • a collar 21 which enters a recess 22 in the bore 4 constitutes an abutment limiting the inward movement of the guide member 19.
  • the guide member is also provided with a notch 23 the surface of which is defined by straight lines extending parallel to and in the direction of the axis of the rotatable cylinder 7.
  • the mounting of the presser foot 18 is accomplished by first sliding the guide member 19 upon a plane 224 of portion 8 of the rotatable cylinder (Fig. 3) and rotating the same against the action of spring 11 (-Fig. 4) until portion 8 engages the latching position of guide member 19 shown in Fig. 5.
  • the latching position of the guide member 19 as shown in Fig. 5 is again illustrated in Fig. 7 where it is considerably enlarged.
  • G designates the line of contact of member 8 with the guide member 19.
  • Said straight line G extends in that location perpendicularly to the plane of Fig. 7 of the drawing.
  • the contact plane is indicated at T and N is the vertical plane or normal for the contact plane T through the contact line designated G, while the axis of rotation of rotatable cylinder 7 is indicated at A, the plane passing through the contact line G and through axis of rotation A is designated E, while on represents the angle enclosed by the planes E and N.
  • the angle a is smaller than a predetermined limiting or critical angle, the self-locking becomes operative.
  • the self-locking becomes effective, i.e., the parts no longer can slide one upon the other so that any shortening of the distance between the contact location and the axis of rotation is not possible.
  • the load is absorbed by the bearing of the rotatable latch and the connection is completely rigid in spite of a freely sliding fit.
  • Figs. 8 and 9 illustrate a second embodiment of the invention.
  • a support member 10 3 is secured to the presser bar 1 by means of a screw 2.
  • the support 1113 is provided with a vertical slot 106 which is open at the bottom.
  • the slot 106 extends to a position above a cylindrical bore 104- disposed in the direction of sewing and is located in a plane which passes through the axis of the bore 164.
  • the part of slot 106 which is located below the bore 104 serves for guiding the shank 117 of the presser foot.
  • the slot 106 is provided at one end with a fixed abutment 12-2 which is engaged by an edge 121 of the shank 117 of the presser foot.
  • the abutment 122 furthermore serves for the support of a two legged spring 111.
  • the latter is accommodated in the portion of the slot 106 above the bore 104 and is secured in its position by a pin 11%.
  • a double armed latch lever 1th is mounted for rotation about an axis 107.
  • a cylindrical guide member 1-19 is provided on the shank 117 of the presser foot which member is provided with a cylindrical recess 123 extending transversely of its axis.
  • the cylindrical axis of the recess 123 in this connection is disposed somewhat above the plane through the axis 1d? and point of contact of the latch lever 108 and guide member 119 but still analagous to the conditions in accordance with Fig. 7 so that the device operates in a self-locking manner.
  • the guiding arrangement can be very loosely fitted. The force of the spring is then readily sufficient to completely eject the presser foot.
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidingly received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and hav ing a latch portion adapted to engage said recess and spring means extending endwise of said
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide.
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defininga slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidingly received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and having a latch portion adapted to engage said recess and spring means extending endwise of said lever and bias
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidingly received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and having a latch portion adapted to engage said recess and spring means extending endwise of said lever and bias
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidingly received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and having a latch portion adapted to engage said recess and spring means extending endwise of said lever and bias
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical ,bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidably received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and having a latch portion adapted to engage said recess and spring means extending endwise
  • Means for releasably securing a presser foot to the presser bar of a sewing machine comprising, in combination, a support member adapted to be secured to the presser bar of the machine, and a shank supporting a presser foot at the lower end thereof and extending into said support member; said support member defining a generally horizontally disposed cylindrical bore and having a pair of jaws at its lower end defining a slot extending longitudinally of the cylindrical walls of said bore, and said shank having a guide member at its upper end adapted to be slidingly received in said bore and having an abutment surface at one end for contacting said support member adjacent one end of said bore in the mounted position of said presser foot in locked condition, and said guide member having a recess extending substantially centrally and transversely thereof and presenting a latch surface, and self-locking latch means comprising a lever extending longitudinally of said support member and having a latch portion adapted to engage said recess and spring means extending endwise of said lever and bias
  • said resilient means comprising a spring having a pair of legs biased toward each other and said bore connecting with an upwardly extending groove having parallel sides adapted to receive said lever and one leg of said spring, said one leg of said spring being in engagement with one end of said lever defining said latch portion and said latch portion being in engagement with said latch sure face, and the other leg of said spring being disposed Refe en es Cited the file of th s p en UNITED STATES PATENTS 78,652 Craig June 9, 1868 FOREIGN PATENTS 1,096,141 France o -r-- Dec. 29, 1954

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US755519A 1957-08-24 1958-08-18 Means for mounting the presser foot on sewing machines Expired - Lifetime US2985127A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE881623X 1957-08-24

Publications (1)

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US2985127A true US2985127A (en) 1961-05-23

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US755519A Expired - Lifetime US2985127A (en) 1957-08-24 1958-08-18 Means for mounting the presser foot on sewing machines

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US (1) US2985127A (ja)
BE (1) BE570463A (ja)
CH (1) CH363224A (ja)
DE (1) DE1065255B (ja)
DK (1) DK93165C (ja)
FR (1) FR1209550A (ja)
GB (1) GB881623A (ja)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204593A (en) * 1962-12-19 1965-09-07 Singer Co Presser foot adjusting device
US3259090A (en) * 1962-10-04 1966-07-05 Unique Zipper Distributing Co Zipper foot attachment for sewing machines
US3270695A (en) * 1964-02-11 1966-09-06 Singer Co Screwless-type presser-foot clamp
US4461227A (en) * 1981-09-18 1984-07-24 Union Special Corporation Quick release mechanism for an automatic sewing machine workholder
WO1991005900A1 (fr) * 1989-10-13 1991-05-02 Mefina Sa Ensemble pour monter amoviblement un outil sur un organe menant
US20120097085A1 (en) * 2010-10-22 2012-04-26 Brother Kogyo Kabushiki Kaisha Sewing machine presser attaching mechanism and sewing machine provided therewith
CN103437077A (zh) * 2013-08-13 2013-12-11 吴江市中盛机械有限公司 一种压板连接安装夹
US10676848B1 (en) * 2017-08-29 2020-06-09 Suzuki Manufacturing, Ltd. Sewing machine needle clamping device
US20240060223A1 (en) * 2022-08-18 2024-02-22 Singer Sourcing Limited Llc Sewing machine ankle assemblies having a resilient member for attaching a presser foot

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT292777B (de) * 1968-06-12 1971-09-10 Maschf Augsburg Nuernberg Ag Antrieb für zwei- oder mehrachsige Triebdrehgestelle von Schienenfahrzeugen

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US78652A (en) * 1868-06-09 Improvement in braces foe bits
FR1096141A (fr) * 1953-07-30 1955-06-09 Gegauf Fritz Ag Dispositif de fixation du pied-presseur à la barre de pied-presseur d'une machine à coudre
DE1019149B (de) * 1956-07-07 1957-11-07 Karl Friedrich Mueller Einrichtung zum Befestigen des Stoffdrueckers an der Stoffdrueckerstange von Naehmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US78652A (en) * 1868-06-09 Improvement in braces foe bits
FR1096141A (fr) * 1953-07-30 1955-06-09 Gegauf Fritz Ag Dispositif de fixation du pied-presseur à la barre de pied-presseur d'une machine à coudre
DE1019149B (de) * 1956-07-07 1957-11-07 Karl Friedrich Mueller Einrichtung zum Befestigen des Stoffdrueckers an der Stoffdrueckerstange von Naehmaschinen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3259090A (en) * 1962-10-04 1966-07-05 Unique Zipper Distributing Co Zipper foot attachment for sewing machines
US3204593A (en) * 1962-12-19 1965-09-07 Singer Co Presser foot adjusting device
US3270695A (en) * 1964-02-11 1966-09-06 Singer Co Screwless-type presser-foot clamp
US4461227A (en) * 1981-09-18 1984-07-24 Union Special Corporation Quick release mechanism for an automatic sewing machine workholder
WO1991005900A1 (fr) * 1989-10-13 1991-05-02 Mefina Sa Ensemble pour monter amoviblement un outil sur un organe menant
US5143006A (en) * 1989-10-13 1992-09-01 Mefina S.A. Assembly for detachably mounting a tool on a driving member
US20120097085A1 (en) * 2010-10-22 2012-04-26 Brother Kogyo Kabushiki Kaisha Sewing machine presser attaching mechanism and sewing machine provided therewith
US9297103B2 (en) * 2010-10-22 2016-03-29 Brother Kogyo Kabushiki Kaisha Sewing machine presser attaching mechanism and sewing machine provided therewith
CN103437077A (zh) * 2013-08-13 2013-12-11 吴江市中盛机械有限公司 一种压板连接安装夹
US10676848B1 (en) * 2017-08-29 2020-06-09 Suzuki Manufacturing, Ltd. Sewing machine needle clamping device
US20240060223A1 (en) * 2022-08-18 2024-02-22 Singer Sourcing Limited Llc Sewing machine ankle assemblies having a resilient member for attaching a presser foot

Also Published As

Publication number Publication date
BE570463A (ja)
DE1065255B (ja)
FR1209550A (fr) 1960-03-02
DK93165C (da) 1962-04-02
CH363224A (de) 1962-07-15
GB881623A (en) 1961-11-08

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