US1501901A - Presser foot for sewing machines - Google Patents

Description

2 Sheets-Sheet 1.

G. S. GATCHELL PRESSER FOOT FOR SEWING MACHINES Filed May 26 1922 Jul 22, 1924.

INVENTO WITNESSES:

July 22, 1924. 1,501,901

. G. S. GATCHELL PRESSER FOOT FOR SEWING MACHINES Filed may 25, 1922 2 Sheets-Sheet 2 WITNESSES: INVENTOR M $512640 Patent .lnly W24 Gnomes s. GATCHELL, or ROSELLE rank, new JERSEY, ASSIGNOR T E SING MANUFACTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CORIORATION 0?? NEW JERSEY.

PRESSER FOOT FOR SEWING MACHINES.

Application filed May 26,

State of New Jersey, have invented certain new and useful Improvements in Presser Foot for Sewing Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to Presser-feet for sewin machines and has for an object to provi e a presser-foot under which work with heavy cross-seams may be fed by the usual four-motion feed-dog with substantially the same degree of certainty, uniformity and facility as work of constant thickness.

Another object of the invention is to provide the presser-foot with improved and simplified means to prevent the skipping of stitches when the needle or needles of the machine pass from a heavy cross-seam or thick portion of the work to a thinner portion.

According to the present improvement, the resser-foot comprises a shank and pivotally mounted sole-piece.with which is combined a stripper-foot pivotally mounted to rock independentlv of the sole-piece. The stripper-foot has at its free end a downwardly directed projection which rides up on the surface of work of varying thickness, closely adjacent the needle-path, regardless of the position or degree of elevation of the sole-piece.

The strippenfoot is recessed at its under side between its pivot and the free end to afford clearance permitting the downwardly extending projection to drop abruptly from a heavy cross-seam to a thinner portion of the work, immediately upon passage of the cross seam to the rear of such projection, and hold the thin portion of the work upon the throat-plate and prevent its rising with the needle while the sole-piece is held at a higher leve'l by the crossseam.

In the accompanying drawings, Fig. 1. is a fragmentary elevation of a sewing ma chine embodying the invention; showing the presser-foot in side elevation and a heavy 1922. Serial No. 563,864.

cross-seam approaching the resser-foot. Fig. 2 1s a similarvlew showing the crossseam under the main part or sole-piece of the presser-foot. Fig. 3 is a rear elevation,

Fig. 4 a front elevation, and Fig. 5 a top F plan view of the presser-foot shown in Figs. 1 and 2. Fig. 6 is a disassembledperspective view of the presser-foot. Fig. 7 is a view similar to Fig. 1 of a modified form of the presser-foot embodying the invention. Fig. 8 is a view of the modified resser-foot rest 111g upon a cross-seam and Fig. 9 is a top plan view of the resser-foot shown in Figs. 7 and 8.,

In the preferred embodiment of the invention, as illustrated in Figs. 1 to 6, inclusive, 1 represents the presser-foot shank which is adapted to be attached as usual to the springpressed 'presser-bar 2 of a sewing ma chine o ordinary construction including the reciprocating needle-bar 3 carrying oneor more needles l which cooperate with suitable loop-taking means (not shown) belam the throat-plate 5 to form stitches. .The throatplate 5 is slotted as usual at 6 for passage of the four-motion feectdog 7.

Pivoted to the shank 1 by means of the pin 8 is the sole-piece 9' having one or more apertures 10 for the needle or needles The front end of the solepiece 9 is slotted at 11 to form toes 12 which are turned up" wardly to facilitate passage of the work thereunder. Pivoted to the shank 1, preferably by means of the pin 8, is the stri p perfoot which is in the form of a pair of spaced parallel arms 13 joined at their'front ends by a crossbar 14 from the center of which a short toe 15 projects rearwardly and downwardly and has a rounded extremity which is received in the slot 11 in the sole'pieoe The arms 13 of the stripper lie along the opposite sides of the sole-piece 9 and are immediately upon passage of the thick portion to the rear of said projections.

The arms 13 are extended rearwardly of the pivot 8 and are formed with recesses 18 for the upper ends of the springs 19 the lower ends of which are received in the recesses 20 in the heel portion of the solepiece 9. The stripper preferably is extended somewhat in advance of the sole-piece 9 to engage a cross-seam before it reaches the sole-piece. The cross-bar 14 is arranged so that its lower rearward edge 14, Fig. 1, will engage and lift the toes 12 when a crossseam 21 passes under the projections 16. When the cross-seam 21 passes the projections 16, the latter drop quickly to the position shown in Fig. 2 and hold the thin portion 22 of the work upon the throat-plate 5, preventing such portion 22 from rising with the needle or. needles and thus insuring the formation of the needle-loops for seizure by he loop-taking means.

Clamped to the presser-bar bushing 2" is a collar 2 carrying a downwardly extending vertical bar 2 the lower end of which terminates directly above the rear end portion of one of the arms 13 of the stripper. When the presser-foot is lifted, as by means of the usual presser-foot lifting lever 2 the bar 2 serves as an abutment for the stripper-foot and holds the rearward end of such foot depressed and the front end elevated, as shown in Fig. 3, to facilitate insertion and removal ofthe work.

According to the modified form of the invention illustrated in Figs. 7, 8 and 9, the

' shank 23 has pivoted thereto at 24.- the solepiece 25 which is formed with the upturned forward extremity or toe 26 and needleapertures 27 between which the sole-piece is longitudinally slotted at 29 for reception of the stripper-arm 30 which is disposed centrally of the resser-foot and is pivotedon the pin 24:. A spring 31 disposed in a recess in the shank 23 presses outwardly upon an arm 32 rigid with the stripper-arm 30 and yieldingly forces the latter into engagement with the work. The arm 30 is formedat its free end with a downwardly extending rounded projection 33 similar in function to the projections 16 of the stripper-foot illustrated in Figs. 1 to 6 inclusive. The arm 30 is also recessed at 34 between the projection 33 and the pivot 24 to enable the projection 33 to drop quickly from a heavy cross-seam 21 to thinner work 22, as illustrated in Fig. 8. The projection 33 engages the work between the needles 4 and acts as a stripper while sole-piece 25 is held man elevated position by the cross-seam 21.

The particular presser-feet disclosed are adapted, more particularly, for lap-seam felhng in a two-needle double-chain-stitch machine and, to this end, the stripper shown in Figs. 1 to 6, inclusive, is formed with neoaeoi guiding flanges 35 while the sole-piece 25 of Figs. 7, 8 and 9 is formed with similar guiding flanges 36.

, The invention is doubtless? susceptible of embodiment, by those skilled in the art, in forms other than those specifically shown and described. For an understanding of the scope of the invention reference should therefore be had to the a pended claims.

Having thus set fort the nature of the invention, what I claim herein is 1. A presser-foot for sewing machines having, in combination, a shank, a main solepiece directly pivoted to said shank and having a limited tilting movement, a stripper-foot pivoted to said shank and having at its forward end a downwardly extending projection, said stripper-foot being recessed intermediate its pivot and said projection to permit the latter to engage a thin portion of the work while said sole-piece rests upon a thicker portion of work.

2. A presser-foot for sewing machines comprising a shank, a flat sole-piece and a stripper-foot pivoted independently of one another coaxially to said shank, said stripper-foot having at its forward end a downwardly extending projection and being recessed at its under side intermediate said projection and its point of pivotal connection to said shank.

3. A resser-foot for sewing machines comprising a shank, a sole-piece and a stripper-foot pivoted independently of one another to said shank, said stripper-foot bein extended in advance of said sole-piece and having a downwardly extending projection and a recess in rear of said projection, said stripper-foot also having means adapted to lift the front end of said sole-piece as work of increased thickness passes under said stripper-foot.

4. In a sewing machine, a resser-foot, means for lifting the Presser-foot, a springpressed stripper-foot pivotally mounted on said resser-foot, and an abutment for turning said stripper-foot about its pivot against the action of its spring when the presser-foot is lifted. I

5. A presser-foot for sewing machines comprising a shank, a sole-piece and a stripper-foot pivoted independently of one another to said shank, and a spring mounted independently of said shank to react in opposite directions against said sole-piece and stripper-foot.

6. A presser-foot for sewing machines comprising a shank, a sole-piece and a stri per-foot pivoted co-axially to said shan said sole-piece being formed with a needle clearance aperture and said stripper-foot having on its underside a downward projection and a recess in rear of said projection.

7. A resser-foot for sewing machines com nsmg' a shank, a sole ieee directly thestri r-foot bein with the exce tion of pivo zed to said shank and hat ing a limited said pr geztion dis oged wholly ab ve said tilting movement, and a stripper-foot work-enga ing sur ace so as not to press up- 10 ivoted to said shank and havin at its on the wor in rear of said projection. 15 grout end a. downward projection 11 a ted to In testimony whereof, I have signed my extend below the work engaging sur ace of name to this s cification. said sole-piece in passing over a cross-seam; G ORGE S. GATCHELL.

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