US2745365A - Spool winder for sewing machines - Google Patents

Description

May 15, 1956 H. ZINK arm. 2,745,365

SPOOL WINDER FOR SEWING MACHINES Filed May 6, 1953 MOTH/m5 ll/JAGENTJ.

tion;

United States Patent SPOOL WINDER FOR SEWING MACHlNES Hermann Zink and Herbert Weuz, Kaiser'slantern, Germany, assiguors to G. M. Pfaif'A.-G., Kaiserslantern, Germany, a corporation of Germany Application May 6, 1953, Serial No. 353,370

Claims priority, application GermanyMay 9,1952

2 Claims. (Cl. 112218) The invention relates tosewing machines,- and relates more particularly to .a novel type .of equipment for windingthread on a spool powered by-thehand-wh'eel .of the sewing machine.

Modern sewing, machines are characterized by a -high degreerofrstreamlining of the upper casing- This not only caters to modern taste, but also has theadvantage spool winding mechanism, the major parts of which. are

concealed, and that can easily be actuated for engagement bythe hand wheel, and'which has provisions for deactivation after a predetermined amount of thread has beenwound onto the spool.

With. the above and other objects ofthe invention in.

view, the invention consists in the novel construction, arrangement and combination of various devices,v elements and parts, as set forth in the claims hereof, certain embodiments of the same being illustrated 'in the accompanying drawings and described in the specification.

The foregoing and other objects of the invention will be best understood from the following description. of exemplifications thereof, reference being had to the accompanying drawings, wherein:

Fig. 1 is an elevational view of .a sewing machine withiaspool'winder in accordance with the invention;

Fig. 2 is a large-scale fragmentary plan view, seen in direction 2-2 ,of Fig. 1, the top cover having been removed, showing the device in the .active, winding, posi- Fig. 3 is a fragmentary sectional view'taken along the irregular secant line 3-3 shown in Fig. 2,.illustrating the device in winding position;

Fig. 4 is a perspective view of the 'device removed from the sewing machine housing;

Fig.6 is an elevational view, partly in section,.taken on line 5-5 of Fig. 2; and

Fig. 6 is a fragmentary plan view, similarto Fig. 2, but showing all the parts in rest position.

Sewing machine.ln carrying the invention into effect in one of @the embodiments which has been selected for illustratiouin the accompanying drawings and for description-in this specification, and referring now particularlygto Fig. 1, there is provided .a sewing machine. 21, foninstanceof the portable type, that has a housing 22.

At the right side of the housing 22, there is disposed a conventional hand wheel 23, and the housing 22 is surmounted by a cover 24. Below the cover 24 there is provided a spool winding mechanism generallyindicated at 26, the major portion of which is concealed below the surface of the cover 24, all as shown in Fig. l.

The spool winding device 26, as best shown in Figs.

. spring v33.

2,745,365 Patented-May 1-956 2-6, comprises-a base plate 27 that is removably mounted on the sewing machine structure 28.

Sizool-carrien-On the base 27 there-is pivotally supportedaspool carrier 29. The spool carrier- 29mmprises an'offset lever 31 that is pivoted with-one end-to the base 27 bymeaus of-a screw 32, anda-spiralspririg 33 (Fig. 3) is provided concentrically withthe-screw-32 which-tends to turn-the lever 31in the-direction 'B. At the freeend of the lever 31 there is secured-a bearingf34 (Fig. 5.) which-journals a-vertical freely rotatable shaft 36. The shaft 36-inc1udes near its lowerenda wheel :37 that is rotatable with the shaft and which carries an annular hand wheel' engaging-member such asa rubber ring/38; the shaft 36 includes near-its upper'endaflan'ge 39that is=rotatable with the-shaft'36 and which carries an-eccentricspool engaging. pin 41- and a =central'spool carrier-pin 42.: A'spool 43 on which there-is-to-be woundea thread 44 may. removably by insertedoverthe pin 42 to rest on the flange 39 while the pin-41engages an aperture-in the spool 43.

Thelever-31has a recess 46 (Figs. 2 and-4 that-faces inwardly of the machine (towards the left in- Fig. 2) and which-is disposed about midway of the length of; the lever and has inclined-surfaces.-- Adjacent theinc'lined surfaces of the recess 46-the lever 31 is providedorr-the inner side with a straight flat surface-47.

The spring .33 normally urges-the lever in- -the direction B towards a-restposition (Fig. 6) -in which the-rubber ring'38-.is-out.of' contact with :the-hand wheel 23;

Control 1 lever.*0n :the base 27 there is efurthermor'e pivoted a control lever a generally indicated at 48, which is pivoted to the base- 27 by means of a-screw:-49&' Concentric with the screw 49 (Fig. 3) there is mounted a Spiral spn'nga5l that issimilar to' the' aforementioned However, the springSl tends :toturn *the lever 48 inthe direction A; oppositely-relative to -the bias that is applied by the spring-33"to the spool carrier 29.

The lever 48 has a hollowzsection SZ-inwhich there is reciprocably slidable -a piston :53 between two opposite end-positions. Theseend positions of the piston 53 are defined by an elongated slot S i -that is formed in the vwall. of the hollow-section :52 and-by a -pin- 56- thaeis lower nose 55, that is formed on the hollow section-'52, 'during movement of the control lever" 48, by the operator,

from the rest position to: the active position for setting the carrier 29.

Furthermore,-the lever 48includes an upright sectio1i58,

that has a "terminal section 59 'which is ben't towards the pin 42 of the spool carrier 29,as -bes't shown in Fig 2, .and the outward bend between the sections and 59:has a recess: 61 for easy grasping by the fiiiger 'of' a harrd'."-

A stop 62 'is provided on the 'base'-27*to 1imit thje of'the lever 48' in direction A, therebfdefining the =rest' po'sition" of the'le'ver '48 (Fig? 6)".

In the active spool winding position, as best shown in Fig. 5, the terminal section 59 of the lever 48-is spaced from the external surface of the pin 42 for a distance b. This distance b corresponds to a certain amount of thread-winding on the spool 43, close to the maximum amount of winding desired, and additional winding of thread 44 will cause the lever 48 to be swung against 7 the lever 31, and thereby enabling the carrier 29 to be :swung by the spring 33 about the pivot of the screw 32. In this manner, all the parts will assume the rest position (Fig. 6);

perati0'n..The operation of the above-describeddevice is as follows i When it is desired to wind thread on a spool, the i spool 43 is inserted over the pin 42 onto the flange 39 of the shaft 36 with a hole of the spool bottom in registry with the pin 41. Thereaftenthe operator will press the lever 48in direction B, for instance by applying finger pressure at the recess 61'. Before the pressure is applied, the apparatus will beat the restposition as 'shownin Fig. 6 wherein the rubber ring 38 is spacedfrom f the' hand wheel 23, and the piston 46 is disposed in the recess 46 of the lever 31. i p

The application of the finger pressure will move the lever 48 in direction B against the bias of the spring 51. During this move, the nose 55 of the hollow section 52 for the piston-53 will. glide along the lateral surface of th lever 31 until the piston 53 engages with its flat'face -the flatsurface 47 thereof-throughout the distance a. During this movement, the spring 57 will be compressed and tensioned by the retraction of-the piston 53 caused by the sliding thereof on the lateral surface of the lever 31. 'This movement will cause the carrier 29 to be swung about its'pivot in direction A against the bias of its spring 33. In the final position, the rubber ring 38 will abut against the hand wheel23, as shown in 'Fig.2. 1 I ,7 V p The springs 33, 51'and 57 are so'dimensionedthatin V "the'active position shown in Fig. 2- the engagement be- .tween the piston 53 and the fiat surface 47 of the lever -31will be maintained until release is effected.

The hand wheel 23' is then started and the winding of the thread44 onto the spool-43 begun and continued in the usual conventional manner. The guiding of the thread 44 onto; thespool 43 may be done in any conventional manner known to the art, such as either manually or, by means ofa reciprocating guide, and since this doesnot form part of the invention this is neither described nor shown in detail. 7 4 gContinued winding will provide the spool 43with a layer of thread windings. When the layer reaches a predetermined thickness, the external surface thereof will member opposite the pivot of said control member and .in-

make contact with the inner surface of the terminal section 59 of the lever 48. Such contact will be made -when the thickness of the thread layer added to the thickness of the spool body reaches the distance b (Fig 5). Further thread winding will result in a push- During this movement of the lever 48, after thepiston 53 has slid ofi the flat'surface 47, the spring 33 will turn the carrier 29 in the direction B, thereby releasing the abutment contact between the rubber ring 38 and the hand wheel 23. The parts will come to rest as shown 'in Fig. 6, and the spool 43 maybe removed offthe pin 42.

This a vmovementis aided by the spring 51. I a

The device shown in Figs. 2-6 may be built separately,

and thereafter mounted on the finished sewing machine.

For, the assembly, there are provided elongated slots 63 in the base 27 so that the base 27 may be adjustably mounted by means of screws 64 that protrude through the slots 63. t

The cover 24 is provided with an aperture 66 through which may protrude, of the entire device 26, only in the pin 42 and the flange 39 as well as the upright section 58 and the terminal section 59 of the'lever 48.

By this arrangement, the streamlined appearanceof the sewing machine head is preserved, and the chances minimized for damage during movement on and off the machine of a cover. 7

It will be apparent to those. skilled in the art that the novel principles, of theinvention disclosed herein in connection with specific exemplifications thereof will suggest various other modifications andapplications of the same. It is accordingly desired that in construing the breadthof the appended claims they shall not be limited to the specific exemplifications of the invention described active position, a control member pivoted for arcuate movement in opposite directions between an active carrier engaging position and airest position wherein fit is disposed substantially perpendicularlyto'said spool car.-

rier, member, resilient means urging said control member towards said rest position, and means intermediate, said members comprising a cam surface formed on said carrier cluding a first flat surface, a second flat surface and an intermediate surface, a follower formed fixedly on said control member and being operable to engage said intermedi ate surface when said control member is moved from the ,rest position towards the engaging positionthereby moving I 7 said carrier from the inactive to the active position, and

a plunger movably'disposed in said control member adjacent said cam follower thereof and being spring pressed towards ejection frorn said control member and having a flat face disposed at an angle to said cam follower and being operable to engage in abutment said first flat surface in the active position and operableto engage in abutment said second flat surface in the rest position.

2. In a device, as claimed in claim 1, said cover ex tending to a height slightly inferior to that ofsaid carrier and of said control lever, the top portion of said carrier and ofsaid control lever protruding through the aperture of said cover and extending beyond the external surfaceof the cover, said cover concealing all other portions of said carrier and control lever.

References Cited in the file of this patent UNITED STATES PATENTS 1,176,434 Corning Mar. 21,1916 'Kelso Mar.'8, 1932 2,056,829 Colegrove et a1 Oct. 6, 1932 Lefeber Oct. 19, 1886 Ivandick Mar. 18,1947

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