US2569091A - Sewing machine throat plate retaining means - Google Patents

Sewing machine throat plate retaining means Download PDF

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Publication number
US2569091A
US2569091A US65827146A US2569091A US 2569091 A US2569091 A US 2569091A US 65827146 A US65827146 A US 65827146A US 2569091 A US2569091 A US 2569091A
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US
United States
Prior art keywords
throat plate
plate
opening
seat
sewing machine
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
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English (en)
Inventor
Casas-Robert Ramon
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 US2569091A publication Critical patent/US2569091A/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
    • D05B81/00—Sewing machines incorporating devices serving purposes other than sewing, e.g. for blowing air, for grinding
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/0876—Double acting
    • Y10T292/088—Spring arm

Definitions

  • throat plate made integral with the shuttle cover plate, the securing of this plate being effected by a spring secured in its central portion to the lower face of said plate and whose two ends are adapted to cooperate with the edges of a closing cover plate fixed rigidlyto the framework of the machine.
  • a throat plate In sewing machines equipped with such a throat plate the latter must be withdrawn, by causing it to slide in its seat, in order to cause the ends of the spring to escape the edges of the cover plate.
  • the throat plate can only be removed after it has been caused to rock in order to become disengaged from the teeth provided to produce the feed of the fabric. In fact, in order to do this, it is necessary to lift the sewing machine from its support and act on the under face of said throat plate.
  • An object of the present invention is to provide an improved device for holding a removable throat plate member on a seat about an opening in a frame member of the sewing machine including a plug carried by one of said members, the other of said members having a circular socket opening for receiving said plug and cooperating spring and cam means carried by the plug and socket opening to releasably retain the plug in the socket and said throat plate member on the seat of the frame member.
  • Another object of the invention is to provide a device of this class, wherein the stationary part of the machine has a recessed seating for the throat plate.
  • the stationary member consists of a plug in the form of a screw with cylindrical head provided with a circular groove, the throat plate having a through pocket opening provided with a conical seat and a conical guiding surface, and a spring in the shape of a split ring, located in the circular groove of the pin, becoming engaged together with the pin in the through socket opening when a pressure is exerted on the throat plate and wherein the conical guiding surface causes the centering of the screw head in the through socket opening and a compression of the spring when a pressure is exerted on the throat plate, a further pressure exerted on the throat plate permitting the split ring to expand and become applied to the conical seat in the through opening of the plate, the spring exerting thus the forces necessary to hold the throat plate.
  • a further object of the invention is to provide a throat plate equipped with a device of this class and provided with means for allowing a force to be exerted on this plate for disengaging and removing same.
  • Still another object of the present invention is to provide a removable throat plate to be held on a cover plate fastened to the frame of the machineequipped with two devices of the above class consisting chiefly in two stationary spaced screws with cylindrical head serving as plugs, two spaced through holes or socket openings in the throat plate to receive the two screw heads, a recessed seating in the cover plate of the machine and two split-ring springs, this throat plate being further provided with an opening adapted to receive a tool by means of which a force may be exerted on the throat plate for disengaging and removing same.
  • Fig. l is a perspective view of the assembly.
  • Fig. la is a perspective view of a modified form of throat plate.
  • Fig. 2 is a partial view in section of the device.
  • Fig. 3 is a plan view of a part of the device.
  • FIG. 3 indicates the framework of the machine a portion of which only is shown. In the interior of this framework are mounted the shuttle, the teeth carrying member producing the fabric feed and the actuating. members therefor.
  • a cover plate 2 is secured in a stationary manner by two members I having a cylindrical head such as shouldered pins or screws with cylindrical head as shown.
  • the cover plate 2 is provided with a seat 8 adapted to receive a throat plate.
  • the latter may be formed by a plate 5, Fig. 1, for sewing or by a plate 5, Fig. 1A, provided with a teeth guard for darning work.
  • These plates 5, 6 are selectively held and maintained in position in the seat 8 by means of two spring latches the parts of which are brought into engagement, that is to say into the locked position (position shown), or disengaged from one another by a simple pressure of a pull respectively exerted on the throat plate.
  • each of the latches is mounted on the free end of two securing screws I.
  • these screws have a cylindrical head 9 and a circular groove I8 with which engages a split ring spring 4.
  • Another part of this latch is formed by a conical seat a which projects into the interior of a circular through hole or socket opening I I provided in the plates and 6. The position of this seat relatively to the inner face of the throat plate is such that when this is in position in its recessed seat (Fig.
  • the spring 4 cooperates with the conical surface a in such a manneras'to exerttwo opposed forces, one on the screw, the other on the throat plate, urging the latter into position and maintaining its lower resting face in contact with the bottom surface of the seat 8, the latter acting as a rest for this plate.
  • the smallest diameter of the through hole or socket H is only slightly greater than that of the head 9 of the screw I.
  • the cylindrical portions 2) of the two holes ll cooperating with the cylindrical portions c of the heads 9 of the screws prevent movements of translation of the plate within its seat 8.
  • the throat plate is enclosed completely in its seat so that it is necessary to provide a device enabling a pull to be exerted thereon for disengaging and removing it.
  • This device is formed by an opening I2 with at least one straight or slightly under cut edge; enabling the tip of a screwdriver I or other tool to be introduced.
  • each through hole I! is provided with a conical portion It.
  • This conical portion guides the end of the head of the screw I in the through hole II and causes a radial compression of the spring under the action of a light push exerted on the plate for the purpose of setting it in place.
  • the device described has numerous advantages as compared with known holding devices. In the first instance it allows of a rapid and easy replacement of a sewing throat plate 5 by a darning throat plate.
  • burrs are not liable to be produced as a result of the slipping of the screw driver out of the slot of a screw head so that no risk of damage to the fabric being worked upon is to be feared from such burrs.
  • the opening shown for exerting a moment on the plate for producing its disengagement may naturally be replaced by any other equivalent means.
  • a sewing machine having a needle and a frame provided with an opening in its upper surface, said surface having a seat about said opening to receive a throat plate, a throat plate having a circular through opening therein, an annular projection of triangular cross section intermediate the ends of the through opening to provide a restricted portion, a screw threaded into the frame and provided with a cylindrical head having an annular recess in the circumferential surface thereof, and a split resilient ring loosely mounted in said annular recess and cooperating with the projection in said through opening to detachably retain and urge the plate on its seat.
  • a sewing machine having a needle and a frame provided with an opening in its upper surface, said surface having a seat about said opening to receive a throat plate, a throat plate having a circular through opening.
  • an annular projection of triangular cross section intermediate the ends of the through opening to provide a restricted portion, a screw threaded into the frame and provided with a cylindrical head having an annular recess in the circumferential surface thereof, and a split resilient ring loosely mounted in said annular recess and cooperating with the projection in said through opening to detachably retain and urge the plate on its seat, said annular projection in the through opening and cylindrical screw head being of substantially the same diameter to definitely locate the plate relatively to the frame.
  • a sewing machine having a needle and a frame provided with an opening in its upper surface, said surface having a seat about said opening to receive a throat plate, a throat plate having a needle opening and a pair of circular through openings therein disposed on opposite sides of the needle opening, an annular projection of triangular cross section intermediate the ends of each through opening to provide a restricted portion, a screw for each through opening threaded into the frame and provided with a cylindrical head having an annular recess in the circumferential surface thereof, and a split resilient ring loosely mounted in each annular recess and cooperating with the projection in said through opening to detachably retain and urge the plate on its seat, said annular projections in the through openings and cylindrical screw heads being of substantially the same diameter to definitely locate theplate relatively to the frame, said plate having a tool receiving opening for rocking the plate to release the same.
  • a cover plate member for the hollow work support and provided with an access opening in its upper surface, said upper surface of said cover plate memher having a seat about said opening to receive a throat plate member, a throat plate member mounted on said seat, means for securing the throat plate member on its seat including a plug carried by one of said members, the other of said members having a socket opening defined by a cylindrical wall for receiving said plug and having upper and lower extremities, said socket opening wall having projection means, at a region intermediate the upper and lower extremities of said socket opening, of substantially triangular shape in cross section, said plug having a protruding part of cylindrical shape provided with an annular recess in the circumferential surface thereof, and a split resilient ring loosely mount- 6 ed in said annular recess and cooperating with said projection means acting as camming surfaces for engaging and contracting the split resilient ring upon placement and removal of the throat plate.
  • a plug carried by one of said members, the other of said members having a socket opening defined by a cylindrical wall for receiving said plug and having upper and lower extremities, said socket opening wall having projection means, at a region intermediate the upper and lower extremities of said socket opening, of substantially triangular shape in cross section, said plug having a protruding part of cylindrical shape provided with an annular recess in the circumferential surface thereof, and a split resilient ring loosely mounted in said annular recess and cooperating with said projection means acting as camming surfaces for engaging and contracting the split resilient ring upon placement and removal of the throat plate, the cylindrical part of the plug having an external diameter substantially the same as the internal diameter of the projecting means in the socket to definitely locate the throat plate relatively to the seat.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US65827146 1945-08-08 1946-03-29 Sewing machine throat plate retaining means Expired - Lifetime US2569091A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH250346T 1945-08-08

Publications (1)

Publication Number Publication Date
US2569091A true US2569091A (en) 1951-09-25

Family

ID=4570188

Family Applications (1)

Application Number Title Priority Date Filing Date
US65827146 Expired - Lifetime US2569091A (en) 1945-08-08 1946-03-29 Sewing machine throat plate retaining means

Country Status (9)

Country Link
US (1) US2569091A (xx)
AT (1) AT176095B (xx)
BE (1) BE462990A (xx)
CH (1) CH250346A (xx)
DK (1) DK68822C (xx)
ES (1) ES172730A1 (xx)
FR (1) FR922012A (xx)
GB (1) GB607452A (xx)
NL (1) NL63917C (xx)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066627A (en) * 1959-02-02 1962-12-04 Gritzner Kayser Ag Sewing machines
US3373709A (en) * 1965-12-23 1968-03-19 Singer Co Sewing machine throat plate locating and securing means
FR2225985A5 (xx) * 1973-04-13 1974-11-08 Manufrance
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US722236A (en) * 1901-04-15 1903-03-10 Hermann A Klemm Loop-holder for sewing-machines.
US863491A (en) * 1905-12-04 1907-08-13 Edwin J Toof Company Sewing-machine throat-plate fastening.
US1262114A (en) * 1917-05-09 1918-04-09 Domestic Sewing Machine Co Inc Sewing-machine.
US1290924A (en) * 1918-04-10 1919-01-14 Edward G Davis Attachment for shoe-stitching machines.
US2087001A (en) * 1935-02-23 1937-07-13 Alvar N Johnson Door catch

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US722236A (en) * 1901-04-15 1903-03-10 Hermann A Klemm Loop-holder for sewing-machines.
US863491A (en) * 1905-12-04 1907-08-13 Edwin J Toof Company Sewing-machine throat-plate fastening.
US1262114A (en) * 1917-05-09 1918-04-09 Domestic Sewing Machine Co Inc Sewing-machine.
US1290924A (en) * 1918-04-10 1919-01-14 Edward G Davis Attachment for shoe-stitching machines.
US2087001A (en) * 1935-02-23 1937-07-13 Alvar N Johnson Door catch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3066627A (en) * 1959-02-02 1962-12-04 Gritzner Kayser Ag Sewing machines
US3373709A (en) * 1965-12-23 1968-03-19 Singer Co Sewing machine throat plate locating and securing means
FR2225985A5 (xx) * 1973-04-13 1974-11-08 Manufrance
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

Also Published As

Publication number Publication date
CH250346A (fr) 1947-08-31
DK68822C (da) 1949-03-28
AT176095B (de) 1953-09-10
ES172730A1 (es) 1946-04-01
FR922012A (fr) 1947-05-27
NL63917C (xx) 1949-08-15
GB607452A (en) 1948-08-31
BE462990A (xx) 1946-03-30

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