US1809148A - Sewing machine - Google Patents

Description

June 9, 1931. v sc 1,809,148

SEWING MACHINE Filed March 27, 192B 2 Sheets-Sheet 1 I N VEN TOR.

A TTORN E YS.

June 9, 1931. M. M. SCHRAGO 1,809,148

SEWING MACHINE Filed March 27, 1928 2 Sheets-Sheet 2 INVENTOR: 10771191115 0 v to presser feet 25 ments of parts, membe machine,

I Patented June 9, 1931 MORRIS M. scmmcro, or .Los inentiis, camronnm snwr'ne MACHINE Application fiIed March 27,

This invention relates to improvements in sewing machines, and particularly to the presser foot therefor; I t

' The'invention has for an object the provision in a sewing machine of a presser foot which will allow sewing wherever fullness is necessary. The particular'device is so arranged and constructed that it may operate on any chain stitch sewing machine which performs a basting operation. At the present time, it is customaryto baste coat sleeves, 'under-collars, facing on coats, edges, bottoms, linings, etc., in position byihand. With my device, however, this basting maybe done on a machine. The device is adaptable for many uses other than that stated and the said presser foot may. operate inthe usual manner,

if desired. The device is simple of construction, easy to handle, and is generally superior of the ordinary fixed type. With the above mentioned and other objects in view, the invention consists in the novel and useful provision, form'atiom'construction, association, and relative arrangers, and features, all as shown in a certain embodiment in the accompanying drawings, described generally, and more particularly pointed out in the claims.

In the drawings: 7 Figurel is a plan view of a. sewing machine incorporating the improved invention, Figure 2 is a side elevation of thesewing machine of Figure 1,

Figure 3 is an end elevation of the sewing Figure); is a fragmental side elevation, partly in section, of a sewing machine rembodying the invention, Y Y L 1 4 Figure 5 is a view similar to Figure 4, certain of the actuating mechanism being in a changed relation, V

Figure 6 is a plan view partly in section of the improved presser foot and associated mechanism, and a Figure 7 is a cross sectional view on the, line 7-7 of Figure 3. I I

Corresponding parts in'the several figures are designated by the same reference char- I acters. Referring now with particularity to the 1928-. seriai'n zasaoss. drawings, the improved sewing machine as an entirety is designated by'A and which machine includes a presser foot Band actuat ing means Ctherefor. The sewing machine proper maybe of any standardiform and in the present instance includes the usual base memer 1 to which is attached or secured astand- I ard 2 which carries the overhanging arm and'which overhanging arm in'turn is'joined with the heads, The head 4-. has within the samejand in part'pro'jecting therefrom a needle bar 5which is adaptedfonvertical' reciprocation whereby -6,'carried thereby may 'jwhensaid needlefisj threaded perform a stitching operation on fabric, such as shown likewise carries and from apresser bar 9. the-overhanging arm has depending there: 'A'main shaft within is adapted to cause "reany needle, such f as at 7 and' 8; "The head ,ciprocation of the needle bar 5, and this main shaft is provided atone end with a hand wheel '10 andlikewisewith a pulley wheel 11, it, being intended be passed about" said pulley wheel 'forthe purpose said shaft with'which it is connected; In the present instance, the main shaft carries a gear- .12. A jack sha naled in abracket me her 14:, which bracket member in.

turn is supported by suitable means 15 joined wit "the A 3, and said jack. shaft carries at one end a gear 16 adapted to mesh with the teeth of the gear 12. A sprocket 17 is' also carried by the jack shaftrfIt is intended that-"this sprocket shoulddrivethe improvedpresser foot B in a manner to be presently described; The improved presser foot B is detailedjin Figures 4', 5, 6,,a'nd' 7, andthe samefincludes a foot member 19', the toe portion 20 of which is provided with an arnr 21 Secured along one side 22 of the foot is 'an' arm' 23 formed with bearing ends 24 and 25. A sprocket wheel 26 is "journ led {between :the arm 21 and the end A shank 27 is secured to the foot at the heel portion thereof. A'shaft 28 i's' adapted to carry asprocket wheel 29 and a ear 30 as between the end 25 of the arm 23 and-the shank, as shown in Figure 7 A, con; 7 m0 tinuous chain 31'is adapted to be carriedlbe of rotating the pulley wheel and the that suitable means should ft '13 is suitably jouro a g n rm 7 dog and the tween the sprocket wheels 26 and 29. The shank is provided with a bearing portion 32 adapted to receive a shaft 33 carrying a gear 34, the teeth of which are in mesh with the gear and said shaft likewise carries a sprocket wheel 35. In the present instance, a continuous chain 36' is in mesh with the teeth of sprocket wheels 17 and35o It will be noted that the presser bar 9 is formed with a flange 37 and that the presser foot'shank is grooved at 38 for reception of said flange 37.- The shank is likewise slotted at 39 and a lock screw 40 is adapted to be passedthrough said slot and secured to the presser bar for holding the presser footto said presser bar.

The sewing machine likewise is provided with the usual feed dog mechanism.designated generally asa. The'idogis shownatcl and dogiis actuated or reciprocated ver tically and horizontally in the usual manner to cause a feeding in a given direction of the fabric or other material 8 to be sewed. As the feed dog mechanism is of ordinary construction, it will not be described in detail.

Theoperationof the device is as follows: Afterthe presser foot is in position and the needle threaded; two layers of fabric 7 and] 8: can be brought in position between the feed being/elevated. with the usual mechanism for lifting the presser bar to permit thisto bedone. The presser foot is, of course, pro vided with either a bifurcated toe or a slot, such as shown atl42, .so that the needle may pass therethrou'gh to perform the stitching operation. The top fabric 7 can then be pushed forward so as to pair the'saine and the chain 31 iwill feed". this cloth in suchpufled conditionwith the cloth 8 so that a sewin operation between the puffed cloth and t e stitched cloth is" accomplished. It willbe evident that I have provided a presser foot having a caterpillar tread andwhich is ada ted to 'be operated ormovedby suitable mec anism. It is also lobvious that 'un'der' certain :conditions, the caterpillar tread w en would ciqnsmumhe r sser foot'c'hain would not always have to be' power: driven as the cloth couldbe pushed aheadPand frictional engagement of thetop ."clothwith the bottom clothi would carry the top cloth forwa dand likewise cause movement ofthe tread. v I o v 'I do not wish to' be limited to the precise manner of: driving'the tread of the presser foot as many other methods could be readily adopted. In fact [the drive could be effected directly within the head 4,"utilizing, a' drive from the mainllshaft. In factythis" latter. method wouldbe preferabl'e 'in'a-ctual use and serviceias external obstructions andidang'er elf-[contacting with. the driving i'chain :36 wouldbe eliminated. f

It is obvious that various chaiiges and modifications and .variatitnsmay bemade in presser foot, the presser foot between said sprocket wheels.

2. In a device as disclosed, a presser foot having a fo'ot 'porti'on' and heel and toe portions; a presser bar receiving'shank secured to the heel portion, sprocket wheels secured tothe shank'and toe portions; a continuous chainbetween said sprocket wheels, and

means for driving one'of' said sprocket wheels.

3. As. a new 'arti'cle'of manufacture a presser foot'including afoot portion and heel andtoe' portio-ns,.sa id toe portion being provided with an'extended arm, an elongated arm secured to'the footportion; a sprocket wheel journaled betweenthe'two arms at the toe portion, tween the elongated arm and the heel, and a continuous chain extending between said sprocket wheels. V

In testimony whereof, I have signed my name. to' this specification at Los Angeles, Calif. this 8th day of March, 1928.

' .YMORRIS M. SCHRALGO.

a' sprocket wheeljournaled be'

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