US731697A

US731697A - Blindstitch sewing-machine.

Info

Publication number: US731697A
Application number: US12983502A
Authority: US
Inventors: John G Lewis
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-11-03
Filing date: 1902-11-03
Publication date: 1903-06-23
Anticipated expiration: 1920-06-23

Description

n. 731,697. I v PATEN-TED JUNE 23, 1903:

' J. G. LEWIS.

BLINDSTITGH SEWING MACHINE.

APPLIOATION FILED NOV. 3, 1902. I N0 MODEL.

nun/ml I UNITED ST TES latented June 23, 1903.

FFICE.

ATENT BL INDSTITCH SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 731,697, dated June 23, 1903; Application filed November 3, 1902. Serial No. 129,835. (No model.)

T at whom itmcty concern.-

. Be it known that I, JOHN G. LEWIS, a citizen of the United States, residing at the city of St. Louis, in the State of Missouri, have invented a certain new and useful Sewing-Machine, of which the. following is such a full, clear, and exact description as will enable any one skilled in the art to which it appertains to a make and use the same, reference being had to the accompanying drawings, forming part of this specification.

My invention relates more particularly to a sewing-machine for blindstitching.

The object of my invention is to provide means for preventing the needle from coming through the goods at the side next the back guide, and thus exposing the stitches.

My invention consists,primarily,in the combination, with a back guide on which the goods are adapted to be held, of a needle coeating said needle longitudinally, and means for causing said guide to recede laterally from said needle after the point of said needlehas entered the material.

In the accompanying drawings, in which like characters of reference refer to similar I of machine herein movable.

11isaneedle-barcarryinganeedle12,which parts in the different views, Figure 1 isa side view, partly in section and partly in elevation, showing a portion of'a sewing-machine embodying the preferred form of my invention. Fig.2 is a top plan view of apportion of the machine, and Fig. 3 is a detail View of a portion of the mechanism shown in Fig. 2.

' 1O isa back guide around which the goods are adapted to beheld and which in the form shown and described is is preferably held in position in the bar by means of a set-screw 13. The needle-bar 11 reciprocates longitudinally in bearings 14 and The shaft 16 is as to form an overseaming-stitch; but this is not essential to my invention. The needlebar 11 is reciprocated longitudinally by a bar 17, secured to a short collar 18, carried by said needle-bar. The needle 12 is preferably mountedin the center of the needle-bar 11 in the usual manner. The back guide 10 is carried by an arm .21, pivotally mounted at a point 22 to an arm 23 of the machine.

Mounted on the main shaft 24 of the ma chine, which is preferably contained in a housing 25, is a cam 26. In this cam 26 is formed, as best shown in Fig. 3, a groove or guideway 27, in which runs a stud or roller 28, carried on a bifurcated arm 29. The bifurcated arm 29 embraces the main shaft at one end and at the other is pivoted to the arm 21, carrying the back guide 10.

In the operation of this invention the needle-bar 11 is moved upwardly by means of the bar 17, and as the point of the needle 12 enters the goods folded around the back guide 10 the inclined portion of the guideway-27 comes in contact with the stud or roller 28, andthus draws the end of the arm 21 toward the housing 25. This causes the back guide 10, carried by the other end of said arm 21, to recede from the needle 12, thus preventing the-enlarged portion of the needle from striking against the back guide and coming through the goods or glancing.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-- 1. In a sewing-machine, a guide on which the goods are adapted to be held, a needle cooperating with said guide, means for reciprocating said needle longitudinally, and means for causing said guide to recede laterally from said needle after the point of said needle has entered the material.

2. In asewing-machine, a pivotally-mounted guide on which the goods are adapted to be held, a needle cooperating with said guide, means for reciprocating said needle longitudinally, and means for causing said guide to recede laterally from saidneedle after the point of said needle has entered the material.

3. In a sewing-machine, an arm pivotally mounted intermediate its length, a guide on which the goods are adapted to be held carried by one end of said arm, a needle cooperating with said guide, and means connected with the other end of said arm foreausing said guide to recede laterally from said needle after the point of said needle has entered the goods...

In testimony whereof I have hereunto set my hand and affixed my seal in the presence of the two subscribing witnesses.

JOHN G. LEWIS.

Witnesses:

JAMES H. BRYsoN, L. B. BEACH.