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US2983531A - Means for automatic locking and releasing rechangeable work guiding cams in zig-zag sewing-machines - Google Patents

Means for automatic locking and releasing rechangeable work guiding cams in zig-zag sewing-machines Download PDF

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Publication number
US2983531A
US2983531A US625400A US62540056A US2983531A US 2983531 A US2983531 A US 2983531A US 625400 A US625400 A US 625400A US 62540056 A US62540056 A US 62540056A US 2983531 A US2983531 A US 2983531A
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US
United States
Prior art keywords
cam
levers
zig
machines
releasing
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
US625400A
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English (en)
Inventor
Moro Antouio
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Borletti SpA
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Borletti SpA
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Filing date
Publication date
Application filed by Borletti SpA filed Critical Borletti SpA
Application granted granted Critical
Publication of US2983531A publication Critical patent/US2983531A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/46—Rod end to transverse side of member

Definitions

  • the device for automatic locking and releasing of said cams which ⁇ forms the object of the present invention, responds to these requirements.
  • Said device comprises releasable clutch means for the cam, acting against the cam expulsion means, both carried by supports driven in rotation by the shaft of the cam.
  • the device is characterized in that said releasable clutch means consists of a pair of spring hook levers pivoted behind the mounted cam, in diametrically opposed points of the relative support, said levers having projections on their free ends bearing against the front face of the cam in such a manner as to make it possible to disengage them by the direct action of two lingers, while the cam expulsion means consist of springs placed behind the cam itself, between the latter and the relative support.
  • the hook levers are pivoted upon a sleeve fixed, in an easily removable manner, on the front of a cam-supporting liange, projecting from a means driven, in rotation, by the cam-carrying shaft, upon which the sleeve is so centered as to be possible to compose the device according to the invention, independently of the machine on which it has to be applied, in a group standing by itself, apt to be rapidly and easily applied on the machine, if necessary.
  • the hook levers can however be also directly mounted on said flange.
  • Fig. 1 is a longitudinal section of an embodiment of the invention, of which Fig. 2 is a front view with cam partially broken in order to show the expulsion spring placed behind said cam;
  • iFig. 3 is a view similar to the one in Fig. 1 of an embodiment of the invention.
  • Fig. 4 is a perspective view of the different detached members of Fig. 3 being disposed in mounting order.
  • Fig. 5 is a perspective view of an embodiment of the cam-supporting ange.
  • shaft 1, carrying cam 2 provided with two radial diametrically opposed openings 3 and 4 is caused to rotate, through a gear or belt transmission (not shown), by the driving shaft of the zig-Zag sewing-machine with a determined speed-ratio.
  • hub 6 On the end ⁇ of shaft 1 disposed towards the outside of the machine frame 5 is fixed hub 6 having a disc flange 7 designed to carry cam 2, with the interposition of a flat spring S, which pushes the cam outwards.
  • Flange 7 has two openings 9 and 10 corresponding to openings 3 and 4 of cam 2, through which pass the two small levers 11 and 12 with outward ends shaped as teeth having plain surfaces 13 and 14, adapted to engage the front surface 32 of cam 2.
  • the two levers 11 and 12 are mounted on pivots 15 and 16 respectively, about which they can swing.
  • the two pivots 15 and 16 are held by suitable recesses 17, 18 formed in a ring 19 firmly fixed lon llange 7.
  • the two levers 11 and 12 are pushed outwards by springs 21, 22 respectively, which in fact make the lever action elastic.
  • the displacement of 4lever 11 is limited on the outside by side 23 of spring 8, said spring being adapted to be displaced and adjusted according to arrow 24 by lunscrewing screw 25, which locks it; the similar displacement of lever 12 is limited by means of the small adjustable plate 26 adapted to be locked by screw 27.
  • the holes, through which the respective screws 25 and 27 pass, are oblong.
  • Cam '2 is placed and locked in correct position by introducing it on shaft 1, by which it is centered, and then by causing its eccentric hole 29 to coincide with pin 36 fixed to flange 7, said pin determining the exact angular orientation of the cam.
  • the cam When the cam is in correct position, in its seat, it keeps wings 23 and .28 of spring 8 pressed, said wings maintaining the cam constantly pushed outwards.
  • the two small levers 11 and 12 will stop against the stops 23 and 26 predisposed in such a position that the ends 33 and 34 of said levers may be within a circumference with a diameter suitably smaller than the one of surfaces 3S-36 of the corresponding openings 3 and 4 of cam 2.
  • flange 107 with hub 106 is fixed on the rotating shaft 101 as described for the first embodiment.
  • plain zones 139 which serve as supports for the demountable cam 102.
  • the locking hook levers 112 and 133 are mounted by means of pivots 141i on the small ears of a sleeve 141, which is adapted to be introduced on hub 106 and xed by screws 142, said screws entering holes 143 of sleeve 141 and being screwed in the threaded holes 144 ⁇ of ange 107.
  • Hook levers 112 and 133 are guided in hollows 145 of sleeve 141 and pushed outwards by springs 121 and 122.
  • Ring 146 which is centered on band 147 ofsleeve 141 and is held between projection 148 and plain surface 149 of flange 107.
  • Ring 146 can, if desired, be substituted by two small plates 246 (see Fig. 5) adjustably mounted on flange 107 supporting the cam near leversl 112 and 133, and cooperating with said levers by means of their edges.
  • the axial push of the cam outwardly is effected by two springs 128 which are held between plain sectors 151 and plain surface 149 by screws 142 passing through the respective holes 152.
  • cam 102 moves in an outward direction, when hooks 112 and 133 are pushed towards axis 101, in similar manner to the one described for the first embodiment.
  • cam 102 can have more than one reference hole 155 which must coincide with pin 156 located centrally on support zones 139; consequently cam 102 can be inserted into as many angular positions as are the number of holes 155 provided in the cam, so as to allow one cam various different angular positions and therefore as many combinations for different cyclic seams.
  • cam locking and unlocking levers instead of being rigidly pivoted by one end and made elastic by a spring, can be levers formed by a flexible plate xed by one end and provided with a hooking tooth at the opposite free end.
  • improved means for the automatic locking and releasing of rechangeable cams comprising releasable clutch means for the cam acting against cam expulsion means, a cam shaft, support means carried by and driven in rotation by the shaft and supporting said clutch means and cam expulsion means, and said releasable clutch means consisting of a pair of spring hook levers pivoted behind the mounted cam on diametrically opposed points of the support, said levers projecting with their free ends from the front face of the cam in such a manner as to make it possible to disengage them by the direct action of two fingers', while the cam expulsion means consists of springs placed behind the cam itself, between the latter and the support, orienting means on said support for engagement with corresponding means on the cam to orient the cam with respect to said shaft, and adjustable limiting means to limit the outward movement of said levers.
  • said spring means for the expulsion of the cam from its seat consist of a horse-shoe-shaped lflat spring, adjustably fixed to said ange, so as to act by a portion of its inner edge as a stop for limiting the opening of one of said hook levers, when the cam is removed, the stop of the other lever consisting of the edge of a small plate adjustably fixed on the cam-supporting flange in a position diametrically opposed to the one fixing the spring.
  • said support means comprising a sleeve removably fixed on a cam abutting flange, said sleeve having a pair of diametrically opposed openings therein, said cam abutting flange positioned rearwardly of said sleeve and drivingly connected with said shaft, said levers each being pivoted in one of said openings and extending generally axially forwardly, said sleeve having a radially extending hole therein connected with each opening, springs in said holes yieldingly urging said levers outwardly, and spring means for the expulsion of the cam from said support means.
  • Mechanism for locking and releasing exchangeable cam discs for zig-zag sewing machines comprising a shaft, a support on said shaft, a pair of hook levers pivotally mounted on said support at diametrically opposite points, said levers extending forwardly, a cam disc mounted on said shaft forwardly of said support and having a pair of diametrically opposed apertures therethrough, the free ends of said levers extending through said apertures, each hook lever having a hook surface extending transversely of the axis of the shaft and engaging the front surface of the cam disc and forwardly projecting finger engageable parts in advance thereof, orienting means on said support and said cam disc, spring means mounted on said support for urging the cam disc away from said support, further spring means mounted on said support for urging the hook levers radially outwardly, and adjustable limiting means to limit the outward movement of said levers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
US625400A 1955-12-20 1956-11-30 Means for automatic locking and releasing rechangeable work guiding cams in zig-zag sewing-machines Expired - Lifetime US2983531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT2983531X 1955-12-20

Publications (1)

Publication Number Publication Date
US2983531A true US2983531A (en) 1961-05-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
US625400A Expired - Lifetime US2983531A (en) 1955-12-20 1956-11-30 Means for automatic locking and releasing rechangeable work guiding cams in zig-zag sewing-machines

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US (1) US2983531A (sv)
BE (1) BE552746A (sv)
DE (1) DE1039814B (sv)
FR (1) FR1161897A (sv)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207454A (en) * 1963-09-12 1965-09-21 North American Aviation Inc Tape reel and hub
US3278132A (en) * 1963-10-31 1966-10-11 Ht Res Inst Reel lock
US3367596A (en) * 1966-12-16 1968-02-06 Vm Corp Reel mounting and reel mounting assembly
US3649057A (en) * 1970-09-10 1972-03-14 Singer Co Easy pattern disc removal devices
US3854830A (en) * 1973-11-12 1974-12-17 Int Shoe Machine Corp Quick-release mechanism for clamping a tool on a hub
US3927845A (en) * 1974-02-19 1975-12-23 Ralph E Simpson Tape handling means
US4014426A (en) * 1975-03-20 1977-03-29 Siemens Aktiengesellschaft Paper support roll mechanism for use in a teletypewriter or other such printing device
US5683058A (en) * 1996-03-05 1997-11-04 Minnesota Mining And Manufacturing Company Roll supporting hub

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US173126A (en) * 1876-02-08 Improvement in securing saws to spindles
US285303A (en) * 1883-09-18 Edge-setting machine
US505490A (en) * 1893-09-26 Rufus g
US653397A (en) * 1899-11-13 1900-07-10 William H Bush Coupling.
US812784A (en) * 1905-01-05 1906-02-13 Reeves & Co Band-cutter.
US2116735A (en) * 1935-12-04 1938-05-10 Twentieth Cent Fox Film Corp Spool spindle for film magazines
US2251470A (en) * 1939-08-04 1941-08-05 United Shoe Machinery Corp Rotary toolholder
GB557113A (en) * 1942-06-10 1943-11-04 Linen Ind Res Ass Improvements in machines for winding weft cops
FR992267A (fr) * 1944-06-07 1951-10-16 Dispositif de fixation de bobines de cinéma ou analogues
US2615643A (en) * 1951-04-23 1952-10-28 Jr Arthur Barsam Reel and adapter therefor
US2617165A (en) * 1951-05-01 1952-11-11 Stanley Safety snap
US2652989A (en) * 1950-07-13 1953-09-22 British Insulated Callenders Mounting for reels, bobbins, and the like

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE539906A (sv) * 1954-11-03

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US173126A (en) * 1876-02-08 Improvement in securing saws to spindles
US285303A (en) * 1883-09-18 Edge-setting machine
US505490A (en) * 1893-09-26 Rufus g
US653397A (en) * 1899-11-13 1900-07-10 William H Bush Coupling.
US812784A (en) * 1905-01-05 1906-02-13 Reeves & Co Band-cutter.
US2116735A (en) * 1935-12-04 1938-05-10 Twentieth Cent Fox Film Corp Spool spindle for film magazines
US2251470A (en) * 1939-08-04 1941-08-05 United Shoe Machinery Corp Rotary toolholder
GB557113A (en) * 1942-06-10 1943-11-04 Linen Ind Res Ass Improvements in machines for winding weft cops
FR992267A (fr) * 1944-06-07 1951-10-16 Dispositif de fixation de bobines de cinéma ou analogues
US2652989A (en) * 1950-07-13 1953-09-22 British Insulated Callenders Mounting for reels, bobbins, and the like
US2615643A (en) * 1951-04-23 1952-10-28 Jr Arthur Barsam Reel and adapter therefor
US2617165A (en) * 1951-05-01 1952-11-11 Stanley Safety snap

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3207454A (en) * 1963-09-12 1965-09-21 North American Aviation Inc Tape reel and hub
US3278132A (en) * 1963-10-31 1966-10-11 Ht Res Inst Reel lock
US3367596A (en) * 1966-12-16 1968-02-06 Vm Corp Reel mounting and reel mounting assembly
US3649057A (en) * 1970-09-10 1972-03-14 Singer Co Easy pattern disc removal devices
US3854830A (en) * 1973-11-12 1974-12-17 Int Shoe Machine Corp Quick-release mechanism for clamping a tool on a hub
US3927845A (en) * 1974-02-19 1975-12-23 Ralph E Simpson Tape handling means
US4014426A (en) * 1975-03-20 1977-03-29 Siemens Aktiengesellschaft Paper support roll mechanism for use in a teletypewriter or other such printing device
US5683058A (en) * 1996-03-05 1997-11-04 Minnesota Mining And Manufacturing Company Roll supporting hub

Also Published As

Publication number Publication date
BE552746A (sv)
DE1039814B (de) 1958-09-25
FR1161897A (fr) 1958-09-05

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