US693657A - Adjustable trimming attachment for sewing-machines. - Google Patents

Description

No. 693,657. Patented Feb. l8, I902. H. A. KLEMM. ADJUSTABLE TRIMMING ATTACHMENT FOR SEWING MACHINES.

(Application fllad Oct. 2, 1901.)

2 sheets-sheet I.

(No Model.)

INVENTOR WITNESSES:

ATTORNEY Tu: mums PETERS an, vncn'ouwo WASNINGTON. a. c.

No. 693,657. Patented Feb. l8, I902.

. H..A. KLEMM.

ADJUSTABLE TBIMMING ATTACHMENT FOR SEWING MACHINES.

(Application flled oct. 2, 1901.)

2 Sheets-Sheet 2,

(No Model.)

INVENTOB Wm ATTORNEY C i' iW M T llivtrnn stares HERMANN A. KLEMM,

ADJUSTABLE TRIIVHVIING ATTACHMENT FOR SEWING-MACHINES.

PATENT ()FFICE.

OF NElV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 693,657, dated February 18, 1902.

Application filed Octoher 2, 1901, Serial No. 77,290. (No model.)

To aZZ whont it 72mg concern:

Be it known that I, HERMANN A. KLEMM, a citizen of the United States of America, and a resident of New York city, county and State of New York, have invented certain new alid useful Improvements in Adjustable Trim ming Attachments for Sewing-Machines, of which the following is a specification.

My invention relates to overedge sewingmachines having trimming attachments adjustable forward and backward relatively to the needle for varying the widths of the margins outside of the line of stitches and also having a stitch controlling finger of the presserfoot governing the tension of the loops around the edge of the fabric; and my invention consists of the presser-foot carrying such finger mounted adjustably on the presser-bar and so connected with the adjustable cutter-carrying stock that the presser is automatically adjustable along with the cutters to maintain constant uniform relations-of the controlling-finger and the adjustable cutters,whereby the proper relation of the presser for best effects is maintained however the cutters may be shifted, as hereinafter described, reference being made to the accompanying drawings, in which- Figure 1 is an end elevation of part of the head of the needle-bar, presser-bar, and cutterattachmentsupporting head and the parts carried thereby, with a transverse section of the main shaft. Fig. 2 is a side elevation of the same as seen looking in the direction of the feedway of the work and with a transverse section of the presser-foot. Fig. 3 is a horizontal section online 2 2 of Fig. 2. Fig. 4 is a horizontal section on line 1 1 of Fig. 2. Fig. 5 is a view in reverse of Fig. 2, with some parts in vertical section on line 5 5 of Fig. 6. Fig. 6 is a View in reverse of Fig. 1, with the main shaft in section on line 6 6 of Fig. 5.

Arepresents the head of the stationary supporting-arm a, carrying the presser-bar b and the needle 0 in about the same manner as usual.

dis the trimming-cutter-supporting attachment. It is at its upper end attached to the front side of head A by a slideway device 6 and a fastening-screw f, so that it may be shifted toward and from the needle r laterally to the feed-line for varying the width of the margins of the fabric to be overseamed. The cutter-support (1 extends downward below the work-plate (not shown) and carries the stationary cutter g thereunder. The reciprocating cutter h is carried in a vertical slideway 2' of the support (Z, (see Fig. 1,) being attached to a reciprocating block fitted in a slideway k of said support and connected by pin Z and rod on and strap m with an eccentric n on the main shaft 0 for being to ciproeated. The lower part of the cuttersupport is formed as a chute p for discharging the cuttings trimmed off clear of the mechanism; but the cutter attachment is of itself practically the same as shown in my Patent No. 664,277, dated December 18, 1900, to which reference is made for further understanding of the same and need not be more particularly described herein.

My present invention is as follows: For euabling the presser-foot q to shift in unison with the cutter attachment, so that the finger s employed on said foot for controlling the tension of the thread-loops formed around the trimmed edges of the fabric may have constant uniform relation to the cutters and to the trimmed edges, (for best effects, however, the cutters may be shifted,) l mount said foot on ashort shank t instead of mounting it directly on the presser-bar, as usual, and connect said shank to the presser-bar by a joint consisting of the yoke u, attached to the lower endof the bar, and a pin o, thatis slidable in the jaws of the yoke and on which the shankt is adjustable between the said jaws, where space is provided for shifting the shank to the extent of its desired range of adjustment, and a set-screww is provided for securing the shank in its position on the pin. The pin c has at one side of the yoke u an arm or, capable of turning at one of its ends freelyon the pin, but incapable of sliding on it, which arm has a slot y in its other end embracing a stud 2, set in one side of the support (I, the head of which stud confines the arm 00 between it and said side of the support laterally, but allows the necessary oscillatory movement to accommodate the rising and falling of the presser-foot. Thus at any time it is desired to shift the cutters the presser-foot shifts accordingly, the pin 1) being shifted forward and backward in the yoke 14 by the arm (1:, which is shifted by the support cl and the stud z. The shank t and the wall 6 of the space between the yoke members 10 are fitted to bear closely with each other, and thus any rocking motion of the pressure on the pin 0) that might otherwise occur is prevented.

It is understood that the slot 3 in the presserfoot q is to have suitable width to permit the lateral adjustments of the presser-foot, as specified.

The parts indicated at 4 and 5 represent hook-operatin g devices; but they form no part of the invention to be claimed and need not be more particularly described.

What I claim as my invention is-- 1. In a sewing-machine having an upper and lower trimming-cutter adjustable laterally to' the feed-line, the combination with HERMANN A. KLEMM.

\Vitnesses:

A. P. THAYER, C. SEDGWICK.

Images