US3232258A - Rotating sewing machine hook - Google Patents

Rotating sewing machine hook Download PDF

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Publication number
US3232258A
US3232258A US246043A US24604362A US3232258A US 3232258 A US3232258 A US 3232258A US 246043 A US246043 A US 246043A US 24604362 A US24604362 A US 24604362A US 3232258 A US3232258 A US 3232258A
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US
United States
Prior art keywords
hook
hook body
sewing machine
axially
thread
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
US246043A
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English (en)
Inventor
Jr Fritz Gegauf
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.)
Fritz Gegauf AG
Original Assignee
Fritz Gegauf 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 Fritz Gegauf AG filed Critical Fritz Gegauf AG
Application granted granted Critical
Publication of US3232258A publication Critical patent/US3232258A/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

Definitions

  • FIGURE 1 is a front View of a rotating, sewing machine hook.
  • FIGURE 2 is a longitudinal section throughv the hook taken along the line lI-II in FIGURE l;
  • FIGURE 3 is a partial section through the tension ring of the hook
  • FIGURE 4 is a perspective view of a disassembled hook.
  • FIG. 1 illustrates the invention as incorporated in a rotating sewing machine hook such as used in known sewing machines designed for making straight, zig-zag, or ornamental stitches.
  • the particular conventional sewing machine parts illustrated are parts of the universally known BERNINA sewing machine, but are likewise representative, essentially, of corresponding constructions used in other conventional sewing machines.
  • reference numeral 1 designates the hook shaft projecting from the base plate of the sewing machine (not shown). On this shaft is secured the hook 2 with its hub 3 by means of a screw 4. The hook tip 5 takes the upper thread from the needle (not shown). On the side of the hub 3 there is secured a hook disk 6 by means of a screw 7.
  • the hook 2 is formed with an axially extending annular surface 8 and a radially extending annular surface 9 as well as a proled tension ring 11 the plane surface l@ of which forms a second radially extending annular surface.
  • This guiding 8, 9, 10 receives a bobbin case support 12 having a threesided guiding crown 13 and a holding member 14.
  • the split tension ring 11 is lodged in the conical groove formed between a bevelled or conical bearing surface 15 and a horizontal surface 16.
  • a cranked tap i7 engaging a groove 1S in the hook 2 in order to stop the hook, i.e. to prevent the ring l1 from rotating relative to the hook 2.
  • a member i9 destined to deflect the loop.
  • the deector 21 of the member projects beyond the hook tip in order to ascertain a safe loop formation.
  • the stem or tap 22 of the bobbin case support 12 carries the bobbin case 23 having a locking means 24.
  • the hollow space of the bobbin case 23 receives the lower thread bobbin 25.
  • the described hook 2 When the machine is used to sew, the described hook 2 operates in a manner known per se by running about the bobbin case support l2 locked at the holding member 14 and cooperating with the stitch formation elements of the sewing machine (not shown) and more particularly with the needle.
  • the hook tip 5 takes the upper thread from the needle in form lof a loop, widens this loop and guides the thread about the bobbin case 23 whereby the tensioned lower thread is passed through the loop as is well known.
  • the hook disk or washer 6 serves as a support for the upper thread loop.
  • the loop deiiecting member i9 prevents the lower thread from being seized by the hook tip 5.
  • the take-up lever (not represented) so as to terminate the stitch. This cycle is repeated at each stitch.
  • the actual guiding surface 10 -of the tension ring 1l may give way in accordance with the pressure produced and depending on the strength of the thread.
  • the tension ring 11 climbs along the annular bevel surface 15 thereby reducing its diameter and affording for suicient play to permit the jammed thread to be entrained by the hook 2 and to be evacuated at the open point.
  • the tension ring 11 gives way in response to the strength of the used thread. As soon as the thread rests have been removed the proled tension ring 11 comes again to rest with its plane surface 10 on the horizontal surface 16 of the hook 2 since the ring 11 is always and automatically pressed into this base position by the bevelled surface 15.
  • a hook body a lower thread bobbin-case carrier having an annular peripheral bearing rib; an annular track for said bearing rib formed by an internal annular shoulder in said hook body and a guard ring in said hook body cooperable with said shoulder and axially spaced therefrom; said ring forming the axially outer part of said track and being adapted to yield resiliently for axially outward displacement relative to the hook body; said guard ring comprising a split ring mounted axially inwardly of and engaging a conical inner bearing surface in said hook body, said conical bearing surface converging in a direction axially outwardly of said hook body.
  • said split ring having a cross sectional shape such as to provide a line Contact with said conical inner bearing surface of said hook body.
  • said hook body being formed with a radially extending plane bearing surface intersecting said conical inner bearing surface, and said ring having a plane surface engaging said radial plane surface whereby to determine the Width of said track.
  • said hook body being formed with a radial recess; a free end of said split ring being bent for engagement into said radial recess for restraining relative rotation of said hook body and said split ring.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US246043A 1962-01-10 1962-12-20 Rotating sewing machine hook Expired - Lifetime US3232258A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH24962A CH390035A (de) 1962-01-10 1962-01-10 Umlaufender Nähmaschinengreifer

Publications (1)

Publication Number Publication Date
US3232258A true US3232258A (en) 1966-02-01

Family

ID=4182689

Family Applications (1)

Application Number Title Priority Date Filing Date
US246043A Expired - Lifetime US3232258A (en) 1962-01-10 1962-12-20 Rotating sewing machine hook

Country Status (5)

Country Link
US (1) US3232258A (de)
AT (1) AT241253B (de)
CH (1) CH390035A (de)
DE (1) DE1201666B (de)
GB (1) GB1025239A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897740A (en) * 1973-01-22 1975-08-05 Wittenberge Naehmasch Veb Double revolving looper for sewing machines
US3955519A (en) * 1975-06-02 1976-05-11 The Singer Company Needle guard for sewing machine
US4094261A (en) * 1977-03-22 1978-06-13 The Singer Company Adjustable needle guard
US6055919A (en) * 1998-04-29 2000-05-02 Fritz Gegauf Ag Bernina-Nahmaschinenfabrik Spool capsule for a sewing machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1162039B (it) * 1978-09-25 1987-03-18 Necchi Spa Gancio per macchina per cucire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065349A (en) * 1934-04-11 1936-12-22 Free Sewing Machine Co Rotary hook
US2452167A (en) * 1944-10-02 1948-10-26 William H Maxwell Rotary hook
US2743689A (en) * 1954-02-02 1956-05-01 Singer Mfg Co Sewing machine loop-takers
US2773464A (en) * 1953-09-28 1956-12-11 Rabezzama Hector Sewing machine hook and bobbin race assembly
US2857869A (en) * 1955-06-14 1958-10-28 Singer Mfg Co Loop-takers for sewing machines
US3097619A (en) * 1960-07-13 1963-07-16 Cerliani Maurizio Rotary hook devices for sewing machines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE493915C (de) * 1927-09-30 1930-03-17 Mundlos Akt Ges Freilaufender Greifer fuer Naehmaschinen
DE1044572B (de) * 1956-06-13 1958-11-20 Messerschmitt Ag Umlaufender Naehmaschinengreifer
US3016032A (en) * 1957-03-28 1962-01-09 Necchi Spa Rotary hook for sewing machines
DE1053293B (de) * 1957-11-11 1959-03-19 Pfaff Ag G M Frei umlaufender Greifer fuer Naehmaschinen
FR1235214A (fr) * 1958-11-05 1960-07-01 Borletti Spa Dispositif combiné de crochet rotatif et de tambour porte-canette pour machines à coudre
FR1265521A (fr) * 1959-07-20 1961-06-30 Necchi Spa Crochet rotatif pour machines à coudre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065349A (en) * 1934-04-11 1936-12-22 Free Sewing Machine Co Rotary hook
US2452167A (en) * 1944-10-02 1948-10-26 William H Maxwell Rotary hook
US2773464A (en) * 1953-09-28 1956-12-11 Rabezzama Hector Sewing machine hook and bobbin race assembly
US2743689A (en) * 1954-02-02 1956-05-01 Singer Mfg Co Sewing machine loop-takers
US2857869A (en) * 1955-06-14 1958-10-28 Singer Mfg Co Loop-takers for sewing machines
US3097619A (en) * 1960-07-13 1963-07-16 Cerliani Maurizio Rotary hook devices for sewing machines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3897740A (en) * 1973-01-22 1975-08-05 Wittenberge Naehmasch Veb Double revolving looper for sewing machines
US3955519A (en) * 1975-06-02 1976-05-11 The Singer Company Needle guard for sewing machine
US4094261A (en) * 1977-03-22 1978-06-13 The Singer Company Adjustable needle guard
US6055919A (en) * 1998-04-29 2000-05-02 Fritz Gegauf Ag Bernina-Nahmaschinenfabrik Spool capsule for a sewing machine

Also Published As

Publication number Publication date
CH390035A (de) 1965-03-31
AT241253B (de) 1965-07-12
DE1201666B (de) 1965-09-23
GB1025239A (en) 1966-04-06

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