US2531766A

US2531766A - Attachment for fur sewing machines

Info

Publication number: US2531766A
Application number: US30374A
Authority: US
Inventors: Burns Edgar Franklin; Virgil R Woodruff; Jr Albert R Leonard
Original assignee: Individual
Current assignee: Individual
Priority date: 1948-06-01
Filing date: 1948-06-01
Publication date: 1950-11-28
Anticipated expiration: 1967-11-28

Description

Now 28, 1950 E. F. BURNS ET AL 2,531,766

ATTACHMENT FOR FUR SEWING MACHINES Filed June 1, 1948 E g-" Edgar Frank/in Burns Virqi/ R. Waadraff' fl/berz R. Leonard J1! INVENTORS Patented Nov. 28, 1950 ATTACHMENT FOR FUR SEWING MACHINES Edgar Franklin Burns, Virgil R. Woodrufi, and Albert R. Leonard, Jr., Spokane, Wash.

Application June 1, 1948, Serial No. 30,374

1 Claim. 1

Our present invention relates to an improved attachment for fur sewing machines and comprises a device attachable to a conventional fur sewing machine so as to feed the skins to be sewed in such a manner that the fur will not be allowed to protrude through the seam while being stitched. The device will also provide means for adjusting the depth of the stitch from the edges of the skins and the device is quickly and easily removable when necessary or desirable.

In the accompanying drawings we have illustrated one complete example of the physical embodiment of our invention according to the best mode we have thus far devised, but it will be understood that various changes and alterations may be made in the exemplified structure within the scope of the appended claim.

In the drawings:

Fig. 1 is a top plan view of a portion of a fur sewing machine showing the attachment of our invention.

Fig. 2 is a vertical sectional view at line 2-2 of Fig. 1.

Fig. 3 is a perspective view of needle plate and the attachment in inverted position.

Referring now to the drawings wherein we have illustrated the present preferred embodiment of our invention we have shown a portion of a conventional fur sewing machine including the driven feed discs 2 and 4 mounted on base 6 and between which the skins to be sewed are fed.

A conventional needle plate 8 secured as by screw IE! is stationary with relation to the discs and has a groove [2 aligned with and adapted to intermittently receive the needle M which reciprocates across the adjacent rim portions of the discs in conjunction with the looper [6, the needle and looper being actuated by suitable mechanism in housing 3.

With our invention the needle plate 8 is extended laterally as at it and the extension is apertured at 22 and threaded to receive thumb screw 24 which secures the arm 25. A set screw 28 is threaded into the arm 2*; and a lock nut 29 provides for adjustment of the arm with relation to the plate.

As seen in Fig. 3 the plate is formed with arouate shoulders 3d and 32 to provide clearance for the enlarged rim oi the disc 2 and the arm has an extension 34 beyond the end of the plate.

This extension on the under side has a pair of spaced guide ears 35 and 38 triangular in cross-section, the medial lines of the ears converging toward each other to form a trough between the walls 40 and 42 and a flat triangular floor 44.

Co-acting with these ears we employ a wedge having converging side walls 4% and 4:5, a flat bottom having stepped surfaces formed by shoulder 50 and an inclining top wall 52.

In operation a pair of skins to be sewed 54 and 56 having fur 58 are fed to the discs to be pressed together for stitching. However the skins with the fur sides abutting are fed to the opposite sides of the wedge at the under end thereof and the leading edges come closer together following the converging

walls

46 and 48, and 49 and 42 of the guide ears while the fur is folded or curved away from the lower edges to be stitched so that when the needle penetrates the skins no fur will be protruded and a neat stitch will be effected.

Obviously the depth of the stitch may be regulated by means of the set screw 29 and if desired, the thumb screw 24 may be released and the arm swung about its pivot to the dotted position of Fig. 1, out of the way.

By the utilization of our invention a more satisfactory stitch will be effected with a saving in time and effort.

Having thus fully described our invention what we claim as new and desire to secure by Letters Patent is:

In a fur sewing machine, the combination with a needle guide plate and rotating fur-feeding discs, an arm pivotally mounted on the plate, and means for regulating the clearance between the arm and plate for adjusting the depth of a stitch, of an extension on the arm, said extension having a pair of laterally spaced depending wings and said wings having adjoining triangular and converging guide faces, and an intermediate wedge having triangular converging side walls coacting with the guide faces to form troughs alined with the adjacent rim portions of the discs, to receive the edges of the skins to be sewed and to position the fur away from said edges.

EDGAR FRANKLIN BURNS. VIRGIL R. WOODRUFF. ALBERT R. LEONARD, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 770,678 Cunningham Sept. 20, 1904 1,559,267 Lipschitz Oct. 27, 1925 1,680,433 Schwartz Aug. 14, 1928