US2691951A

US2691951A - Thread guide for sewing machines

Info

Publication number: US2691951A
Application number: US311747A
Authority: US
Inventors: Hansen Warren
Original assignee: GELLMAN Manufacturing CO
Current assignee: GELLMAN Manufacturing CO
Priority date: 1952-09-26
Filing date: 1952-09-26
Publication date: 1954-10-19
Anticipated expiration: 1971-10-19

Description

Oct. 19, 1954 w. HANSEN THREAD GUIDE FOR SEWING MACHINES Filed Sept. 26, 1952 Patented Oct. 19, 1954 THREAD GUIDE FOR SEWING MACIHNES Warren Hansen, East Moline, 111., assignor to Gellman Manufacturin a corporation of Illinois Application September 26, 1952, Serial No. 311,747

2 Claims.

This invention relates to certain new and useful improvements in thread guides for sewing machines especially, though not necessarily, of the domestic type.

The thread guide of a sewing machine is generally located on the needle chuck. Prior to the advent of my invention it was a laborious and costly job to firmly connect the thread guide to the chuck. This resulted in increased cost of manufacture of the sewing machine as well as an increase in the sellin price thereof.

My invention has for its object the provision of a thread guide which by means of a simple operation is easily formed to provide a simplified means of attachment to the chuck of the needle bar, which attachment can be quickly and easily accomplished with a minimum degree of labor.

Another object of the invention is to provide in a thread guide for a sewing machine a loop or eye of a construction and form such as will permit easy threading of the thread through the eye and which will function to prevent accidental unthreading of the thread from such eye.

Another and equally important object of my invention is the provision of a thread guide which may be readily detached from the needle chuck for replacement purposes and the like.

Other objects will appear hereinafter.

The invention consists in the novel combination and arrangement of parts to be hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings showing the preferred form of construction, and in which:

Fig. l is a fragmentary perspective view of a sewing machine illustrating my thread guide associated therewith;

Fig. 2 is a fragmentary side elevational view of the same;

Fig. 3 is a perspective view of the thread guide embodied in my invention; and

Fig. 4 is a sectional detail view of the needle chuck with which my thread guide is associated.

For a better understanding of my invention, the size of the various parts illustrated in the drawings is somewhat exaggerated. The conventional sewing machine includes a head Ill from which depends a bushing ll through which a needle bar I2 is reciprocated. This needle bar carries a chuck l3 into which the shank of a needle I4 is removably fixed by a thumb-screw I 5.

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In carrying my invention into efiect, I provide in a wall it of the chuck It a threaded opening 11 into which my improved thread guide is threaded.

Such guide comprises a sing-1e length of spring wire formed to provide at one end portion a coil l8 consisting of a plurality of convolutions I 9. The outer convolution Ell of the coil I 8 terminates into an open eyelet 2| which extends laterally and transversely of the coil. It is through this eyelet 2! that the thread 22 passes on its way through the eye 23 of the needle M. The open portion 24 of this eyelet 2! is preferably located within the confines of the convolution 293 so as to prevent accidental unthreading of the thread from the eyelet 2!.

By simply threading the coil l8 into the opening l'l the thread guide is quickly and easily connected to the chuck I 4. As the inner convolu tion of the coil bears against the shank 25 of the needle M, continued rotation of the coil H2 in a clockwise direction, will cause the convolutions of the coil to wedge against the threads of the opening If? thereby to firmly hold the thread guide against rotation during operation of the sewing machine.

From the foregoing, it is clear that I have provided a thread guide which is not only simple in construction and easy of manufacture but also one which, by a simple operation, may be firmly connected in position upon the chuck it or" the needle bar with the least amount of labor; one which while firmly held in such position may be quickly and easily removed for any purpose.

While I have illustrated and described the preferred form of construction for carrying my invention into effect, this is capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such varia tions and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A thread guide for a sewing machine comprisin a single length of wire having one end formed to provide a hollow coil for threading into an opening of a needle supporting chuck, said member at one side of said coil having its opposite end bent to provide an eye havin an open end through which thread is threaded, said eye extending laterally from said coil and having its open end Within the confines of said coil.

2. A thread guide for sewing machines comprising a single length of spring wire having hollow circular means providing for threaded connection with a needle supporting chuck, said length of wire opposite said means bent laterally and transversely with respect to said means to form an eyelet open at one end through which thread is threaded, the open end of said eyelet being confined Within said means.

References Cited in the file of this patent UNITED STATES PATENTS Number Number Name Date Osborn Sept. 11, 1883 Dow July 5, 1887 Staples May 19, 1891 Grieb Jan. 31, 1933 Bachlotte Sept. '7, 1943 Sanders Feb. 20, 1951 FOREIGN PATENTS Country Date Great Britain -1 Sept. 16, 1935