US2657655A - Guiding device for sewing machines - Google Patents

Description

Nov. 3, 1953 L. MARGAND 2,657,655

cummc nzvxca FOR .szwmc MACHINES Filed May 29, 1950 Z'Shets-Sheet 1 INVENTOR LOU/S MARGAND ATTORNEY Nov, 3, 1953 L. MARGAND cummc DEVICE FOR SEWING MACHINES 2 Sheets-Sheet 2 Filed May;29, 1950 INVENTOR MARGAND ATTORNEY Patented Nov. 3, 1953 GUIDING DEVICEFOR SEWINGMAGHINES Louis Margand, Paris, France, assignor to Lucien Braun, Paris, France Application-Mayzll, 1950,.Serial No. 164,951

Claims priority, application France J une 16, 1949 The invention has for its object a device which may be used in sewing machines in order to facilitate the execution of a stitching line which is to be made at a constant distance from a line existing on the material and taken as base line.

This device comprises a support rod adapted to be fastened on the bar of the presser-foot and carrying a split sleeve to which is secured to an arm, the free end of which is provided with an index blade, adapted to be applied on the base line hereinbefore mentioned.

The split sleeve may be fixed on the support rod at a smaller or greater distance from the bar of the presser-ioot, according to the spacing length which is desired between the stitching line and the base line.

During stitching, the operator has only to maintain the index blade in contact with the base line, and thus the line of stitching made by the needle is at a constant distance from the base line.

The annexed drawings show by Way of example a device in conformity with the invention.

Fig. 1 is an elevation view showing a sewing machine provided with a guiding device according to the invention, the needle and the needle bar having been omitted.

Fig. 2 is an elevation View of the guiding device.

Fig. 3 is a sectional view taken on line III-III of Fi 2.

Fig. 4-. is a plan-view corresponding with Fig. 2, the needle and needle-bar having been removed and the presser bar being shown in section.

Figs. 5 and 6 are elevation views taken from the left and from the right of Fig. 4 respectively. Fig. 7 is an elevation view corresponding with Fig. 6 but showing the index blade and its arm in a raised inoperative position.

In the drawings, I is the frame of an ordinary sewing machine, 2 the presser-foot fixed on a bar 3 by means of a screw 4, 5 the needle fastened on the needle bar by means of a needle holder '5 provided with a screw ll.

According to the invention, the bar 3 of the presser-foot 3 carries a collar 8 provided with clamping screws 9 and II which fasten the said collar on the bar.

The collar 3 is integral with a prismatic block H in which a horizontal rod I3 is pivoted. This rod carries a split sleeve 54, both jaws of which may be clamped by means of a screw I5 so as to fasten the sleeve 14 on the rod I3 at a suitable distance from the block I2.

The sleeve It has a transverse bore in which the rectilinear end of an arm I6 is engaged. This arm carries an index blade I! which may be laid 1 Claim. (Cl. 112-151) on the material to be sewn. The shape of the arm It is such' that the said arm cannot meet the-needle holder I or its screw II, even if the sleeve I4 is near the block I 2. The arm i6 is fixed in the sleeve I I by means of a screw l3.

The rod I3 carries a. ring I9 fastened by means of a screw 2|. This ring has two rectilinear grooved flat portions which are perpendicular to each other. A spring 22 fastened by means of a screw 23 on the block I2 has a bead on its free end which engages in one or the other of the grooves of the ring I9 according as the arm I6 is lowered or raised.

The block I2 may be preferably provided with a thread cutter '24.

The operation of the device is as follows:

The screw I5 being loosened, the sleeve I4 is brought to a suitable distance from the block I2, this distance being greater or smaller, according to the spacing which is desired between the stitching line to be made and the base line to which the said stitching line must be parallel. The screw I5 is then tightened so as to fasten the sleeve I4 on the rod I3.

According to the thickness of the material, the arm It may be slightly displaced in the sleeve I4 after loosening of screw I8, and then the said screw is tightened again.

After each member of the device is in the proper position, the material is positioned so as to bring the index blade IT on the base line chosen (former stitching line, stripe, edge, or the like), then the sewing machine is started and the material is pushed forward under the presserfoot, while the base line is still maintained under the index blade IT. The stitching line obtained is thus exactly parallel to the base line.

It is to be observed that the rod I3 is in a symmetrical position relatively to the frame I and the operator is in no way troubled by any projecting member.

Due to this device, right or curve stitching lines may be executed with accuracy and rapidity, at a desired distance from the edge of the material or from any line, so small this distance may be.

When the guiding device is not in use, the arm I6 may be raised as shown on Fig. 7. In that movement, the ring I9 rotates by degrees, while the spring 22 passes from one groove of the ring to the other one, and maintains the arm It in the raised position. The arm and its index blade I1 do not in the least hinder the work to be performed later when the guide is not used.

The mounting and removing of the device are instantaneous and no tool but a screw-driver is necessary.

The device having been adjusted for a work, if it is desired, after execution of this work, to keep the adjustment in order to later make the same work, it is possible to remove the rod 13 with the ring is, the sleeve 14 and the arm It all in the positions that they occupy on said rod simply by pulling the rod 13 with its assemblages from the bore in block I2, the beaded end of spring 22 snapping from groove 59 upon applying sufficient pulling force to the rod I3. Before the rod :3 and its assemblage is used again, another rod 13 and a set of similar mem bers may be put on the machine.

Obviously the invention is not restricted to the form of construction represented in the draw ings, this form being given only as an example and any change of construction may be adopted without exceeding the scope of the invention.

I claim:

A stitching guide for a sewing machine having a vertical presser foot bar comprising a support block secured to the vertical bar of the presser foot and having a horizontal bore therein, a support rod having a cylindrical extremity axially slidably and rotatably mounted in the bore of the support block, a guide plate carried by the support rod, a ring fixed to the rod between the guide plate and the cylindrical extremity, said ring having two adjacent flat surfaces on the circumference thereof substantially perpendicular to each other, a peripherally extending groove in each of said flat surfaces, a leaf spring having one end fixed to said support block and having a free end provided with a curved. lug-like portion, extending beyond the block to a position to engage in one of said grooves of the ring when the rod is in the bore of the block, said spring being tensioned to cause the lug-like portion to releasably resiliently enter into one of said grooves, to releasably retain the rod against axial movement in the bore of said block and to releasably retain the rod against rotary movement in said bore.

LOUIS MARGAND.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 190,885 Raeuchle Jan. 31, 1893 721,590 Markel et a1. Feb. 24, 1903 751,615 Crawfort Feb. 9, 1904 2,505,548 Hutt Apr. 25, 1950 2,520,415 Le Bovit Aug. 29, 1950

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