US2009998A - Sewing machine - Google Patents

Description

SEWING MACHINE Filed Feb. 7, 1929 4 Sheets-Sheet 1 INVENTOR I mziz on A ATTORNEYS l. GONYK SEWING mcnmn Filed Feb. 7, 1929 Aug. 6,1935.

4 Sheets-Sheet 2 4 sheets-sum :s

.4712! Hey;

.l. GONYK SEWING uAcHI NE 1 Filed Feb. 7, 1929 f Aug. 6, 1935.

Aug. 6,- 1935. [.fGONYK SEWING MACHINE Filed Feb. 7, 1929 I 4 She ets-Shoi 4 awed/i1) Patented Aug. 6, .1935

vii-m STATE amen inasa-ufsasstsza e mmmauu iaim comm-. 101. 115 -158) Tim invention relates to sewin machinesand consists essentially in that the'casing and-the work plate are formed of pressed sheet metalas distinguished from cast metal. The casing itself 5 ismadeintwopartsandthemachineissoconstructed that after unscrewing 'a few fastening screws one half of the casing may be removed at once so that the entire mechanism located in the casing isfreely accessible. The machine according to the invention is simpler andcheaper erably the strips I are securedto the stationary half 2 of the casing by welding, but the edges of the removable half I of the casing may be pulled awayv therefrom as occasion demands.

I The working plate 4 as well as the supporting g body ll for the actuating mechanism for the shuttle and the clotli feed and with'the'supporting body II for the shutttle and the cloth feedthemselves are made of pressed sheet metal and'may be connected with each other by weld: 10

to manufacture, has besides a greater mechani- 8 cal strength, better appearance, and is considerably ieasin weight than the sewing machines heret'oforeinuse. r I i The annexed drawings illustrate by way of example a practical embodiment of the invention. Fig. 1 is a side elevation, partly in section, of the present sewing machine, part .ofthe casing being removed. i v I Figs. 2, 3 and 4 are sections on the line 2,2, I, l and 4, 4 respectivelyo! Fig. 1.

Fig. 5 is an inverted planview plate. v v I Figs-6 and I are detail side-andend views of a partofthexhechanism. further parts of the of the working Figs. 8 and 9 show twolink and lever gearing.

As is seen from Figs. 1 and 2, the casing} of the toppart of the sewing machine consists of two hollow bodies I and 2 which aresubstantially symmetrical and formed of pressed sheet metal such as steel or brass sheet; The casing of the sewing machine may be more or less conventional, with a thick, vertical post standing up from the baseor working plate 4 and having a horizontal overhanging arm extending therefrom. Owing to the smooth surface of the two parts of the casing painting or lacqueringthe-same may be dispensed with; if desired these two may be coated with nickel or the like by electric deposition. Upon the upper surface of a working plate or base 4 and located at one end there is provided an annular member or ring I, which is secured to the base by screws i or other suitable means. This ring is irustro conical in shape and has an ovalbase to. snugly fit the bottom part of v the casing. To this ring the rear half 2 ofthe casing is secured by welding while the frontpart I of the casing is fastened to the said ring in a readily detachable manner, "say by a screw 1. The two partsof the casing are connected with each other by means of strip, l, I in transversesection andcurved to snugly iit the edges of the :two parts of the casing, such edgesengaging into the grooves of the said strip. Prefthe rings l2 may. carry screwswhich serve for friction. For causing them to be revolved toreleasing the coupling between the parts such as By making the casing-in two parts it is possible to journal the main shaft 8 of the machine in a plurality of ball type of bearings, two of which, II and N are shown. These bearings are mounted in rings i2 rigidly secured to the stationary part 2 of the The removable part I ofthe casing is'provided with supporting surfaces on which the rings I! rest loosely. One or more of securing in position the removable part of the The inner rings 14 of the ball bearings are capable of being moved along the shaft with moderated gether with the shaftthe parts fixed adjacent to them to the shaft such as the handle disc 22, the cam 15 and so on are provided with teeth 15 en agingintorecesses 16 of the inner rings. 1 After I! etc. mounted in the casing and the shaft 8 the shaft may be drawn out of the casing by pullingthe handle disc 22,the inner rings 14. remaining in their bearings. i

Instead of employing an external fly wheel, a plurality of revolving masses are provided inside the casing and arranged as nearly as possible symmetrically relatively to the bearings, the jar and wear of the latter being greatly reduced thereby. Between the bearings u and u a disc l5 to 40 which is secured the cam l6, (Fig. 4) is mounted on the shaft 8, such cam serving to actuate the cloth feed lever l1, (Fig. 8) also mounted on shaft 8 between bearings I l and and rotated by said shaft is the disc It to which is secured the eccentric I! for the eccentric rod 20, (Fig. 9), for actuating the shuttle. Between the disc .II and the bearing I4 is arranged the clutch 2!, serving also as a revolving mass. Outside the bearings H and 14 are located the handle discs 22 and the coun- 50 terweight 23. Thehandledisc 22 and the revolving 'disc llare in close proximity to the outside of the casing and to the bearing II respectively In the hub 24 of the clutch mechanism is revolubly mounted the coupling disc 25 while the sleeve 26 is keyed thereto and adapted to move thereon axially. The ring 26 rotatably mounted in the rear part of the casing at 21 serves for shifting the sleeve, such ring engaging into the circumferential groove 29 of the sleeve. The ring carries a handle 36 projecting through a slot 3| of the front part of the casing. A spring 32 adapted to engage into suitable recesses in the slot 3| serves to lock the ring 28 in its two extreme positions. The engagement between the sleeve 26 and the disc 25 is brought about by studs 33 parallel to the axis and fast on the sleeve and adapted to engage into holes 34 in the disc. The parts 25 and 26 are journalled on the hub 2| by balls 35, 36; balls 31 are also interposed between the sleeve and the ring 26 and mounted in the intermediate supports 36 rotatable in thering.

The coupling disc 25 serves at the same time for driving the shaft 6 and for this purpose itis provided'with a groove 39 The outer wall .46 of this groove is detachably screwed on the body of the disc in order to permit of inserting fillers 4| of leather or the like into the groove for the purpose of increasing the friction'of the driving element. The fillers are in the shape of ring segments arranged in a series in the grooves 39. On their outside they have cut into them a groove 42 into which is placed the wire rope 43 used for driving and more advantageous than the leather belts heretofore used. This wire rope passes through holes 44, Fig. 3, of an interposed part 45 inserted into a slot of the two parts of the casing and fastened 'to ,the stationary part of the casing so that the removable part of the casing may be drawn off such interposed part. The rear part or half of the casing is provided with'an opening ll, Fig. 3, closed by cover 12 held in position by screws; through this opening the-coupling and actuating mechanism may be inspected.

As already stated the revolving disc I5 carries I the cam 16 for the cloth feed lever IT. For governing the movement of this lever and therefore also the movement of the cloth feed, this lever is pivoted at 41 to an arm 46 adapted to rock around an adjustable pivot pin. For this purpose the arm 46 is pivoted to an arm 46 loosely mounted on a journal pin 56 together with a disc 46 provided with openings. The said pin 56 is carried by a partition 5! screwed to the removable-half of the casing. This partition is provided with an eye 52 in which a journal pin 56 is rotatably mounted, which journal pin carries on the one hand a wheel 54 provided with pins and on the other hand a handle 55 provided with a pointer 56 movable along a scale.

The wheel 54'cooperates with the disc 46 provided with openings in the manner of a bevel wheel gearing permitting adjustment of the arm 46 by the handle 55.

The handles 55 and 36 of the adjusting mechanism for the cloth feed and for the clutch mechanism may be removed from the studs carrying the same by unscrewing. By removing them and unscrewing the fastening screws T and I3 of the removable half I of the casing, this half may be readily removed from the stationary half 2.

The parts I! and 20' of the link and lever gearing and the parts associated therewith and transmitting the movement from the main shaft 8 to the cloth feed and to the shuttle journalled between the pairs of points 51, 56 and 59, are of the usual form.

Fig. 5 shows the bottom side of the working serve for' iournalling.

plate 4 of the sewing machine with the gearing mounted thereon. It is thought that the description of the arrangement and operation of this gearing may be dispensed with, these being old in the art, but the construction of the parts of the link and lever gearing is novel. Figs. 6 and 7 show by way of example the part iournalled between the points 51. It consists of a sleeve 66 of pressed sheet metal. Fillers 6| inserted in the sleeve and having athroughgoing bore 62' Such bore is provided with an enlargement 66 serving for journalling and on its inside with another enlargement 64 closed by a plug 65; this latter enlargement serves as a receptacle for a lubricant. A cam 66 and two. arms 61, 66 are rigidly secured to the sleeve, preferably by welding.' Forks cooperating with cams and as shown for instance on the arm 66 and on the cloth feed lever l'l, Fig. 8, are provided with linings 69 of bronze or the like for reducing the wear.

The shaft 11, Fig. 5, for driving the shuttle is provided with a special lubricating device. This shaft has two bearings 16, T9 with the lubricating points 66, 8| which are connected with the lubricating device located approximately in the middle of the shaft by a longitudinal bore 62 of the shaft and transverse bores 61. The lubricating device consists of two parts 63, 64 enclosing a chamber 65 for the lubricant, one of these parts, 63, is fast on the shaft while the other part 84 may be screwed on'the former. .These two parts carry packing rings 66 for preventing leakage of the lubricant along the shaft.

The part 13 of the machine located beyond the bearing H of the main shaft is of known construction and therefore not shown in section.

What I claim is:

1. In a sewing machine, a casing for the top part thereof, said casing comprising an overhanging arm and consisting of two substantially symmetrical halves pressed of sheet metal and meeting in a substantially vertical plane, each halfof the arm having two edges meeting corresponding edges of the other half, and curved bars which are I-shaped in transverse section, the edges of one of the said halves engaging into one side of the said bars and being permanently fixed thereto, the adjacent edges of the other half of the casing snugly fitting into the other side of the said bar but being removable therefrom.

2. In a sewing machine, a casing for the top part thereof, the said casing consisting of two substantially symmetrical halves pressed of sheet metal and meeting in a substantially vertical plane, and means for detachably securing the said two halves to each other, a working plate, an upwardly projecting ring secured to said working plate, said ring engaging and fitting into the bottom part of the said two part casing, one half of the said casing being permanently secured to the said ring, the other half being detachably secured to the said ring.

3. In a sewing machine a casing for the top part thereof, said casing consisting of two substantially symmetrical halves pressed of sheet metal, a working plate, a ring secured to said working plate, said ring engaging and fitting into the bottom part of the said two part casing, one of the halves of the casing being welded to said ring, the other half of the casing being detachably secured to said ring, a main shaft of the sewing machine, bearings for said main shaft, said bearings being permanently secured to one half only ring, the other half of the casing being detach- 0! said casing, and snugly iitting the other half of said casing.

4. In a sewing machine a casing for the top part thereof said casing consisting of two substantially symmetrical halves pressed of sheet metal, a working plate, a ring secured to said working plate, said ring engaginz and fitting into the bottom part of the said two part casing, one of the halves of the casing being welded to said ring, the other half of the casing being detachably secured to said ring, in combination with the main shaft of the sewing machine, ball bearings for said main shaft, said bearings being permanently secured to one half only at the casing and snugly fitting the other half of said casing, said ball bearings comprising inner rings longitudinally slidable relatively to the said main shaft and means for releasably coupling said inner rings with the said main shaft for rotation.

5. Ina sewing machine a casing for the top part thereof, said casing consisting of two substantially symmetrical halves pressed of sheet metal, a working plate, a ring secured to said working plate, said ring engaging and fitting into the bottom part 0! the said casing, one oi the halves of the casing being welded to said ably secured to said ring, in combination with a main shaft, ball bearings for 'said main shaft, said bearings being permanently secured to one half only of the casing, and snugly fitting the other half of said casing, said ball bearings comprising inner rings longitudinally slidable relatively to the said main shaft, and means for releasably coupling said inner rings with the said main shaft for rotation, the last named means comprising elements located adjacent to the said inner rings, the said inner rings and elements adjacent thereto being provided with clutching parts engaging with each other.

6. In a sewing machine, a casing for'the top part thereof, said casing consisting of two substantially symmetrical halves pressed of sheet metal having opposed slots therein, a main shaft,

journalled in the said casing, a driving pulley mounted on the said main shaft, a driving belt for actuating the said pulley, an interposed part engaging the said slots and secured to one of the halves of the casing, said interposed part having openings for the said belt to pass through.

IGNATZ GONYK.

Images