US79579A - Petejh - Google Patents

Description

2 Sheets-Sheet 1. H. P. LAMSON;

Sewing Machine.

No. 79,579. Patented July 7, 1868.

Fig.1.

Wainwrew:

' @mw mi.

fl v N PETERS Phulwlitfwmphln Wnhingmn. D.C.

2 Sheets-Sheet 2.

H. P. LAMSON.

Sewing Machine.

Patented July 7, 1868.

ig-Mien gtatrs item: @ffirr.

Letters Patent No. 79,579, dated July 7, 1868.

IMPROVEMENT IN SEWING-MAGHINES.

an fitigetule rennet tn in 1112s: iiitfit'tt new amt making part at flge tame.

TO ALL WHOM IT MAY ooncnnn:

Be it known that I, HENRY P. LAMSON, of Lowell, in the county of Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in Sewing-Machines, of which the following is a full, clear, and exact description, reference being bad to the accompanying drawings, makin'gpart of this specification, in which-- i Figure 1 represents a side elevation of a sewing-machine having my improvements applied thereto.-

Figure 2 is a horizontal section of the same on the line a: a: of fig. 1. i

Figure 3 is a perspective view of the under side of the cloth-table, showing my improved spring-guide.

Figure 4 is an elevation, showing the side of the spring-guide opposite to that represented in fig. 1. v

This invention relates to certain improvements in sewing-machines, for which Letters Patent were granted to Henry J. Hancock, on the 6th day oLAugust, A. D. 1867, said machine using a single thread, and'making a chain or tambour-stitch by means of an ordinarytambour or hook-eyed needle that is made both to produce the. stitch and effect the feed of the cloth; and my invention consists in an improved spring-guide, which is secured to the under side of the cloth-bed or table, serving not only to hold the thread and direct it into the most suitable position to insure its being caught by the hook of the needle, but also to close the hook upon the thread and prevent its point from catching in the cloth as the needle ascends.

To enable others skilled in the art to understand and use my invention, Iwill proceed to describe the manner in which I have carried it out. i

Referring to the accompanying drawings, A, B, and 0 represent the frame of the machine, which may be made of cast iron or other suitable metal. Said machine may be held to or secured on a bench or table by means of a plate, a, projecting from the portion A of the frame, and a binding-screw, b.

D is the spool-spindle or support on which the spool turns, the tension of the thread being regulated by a screw-nut, c, which bears on a piece of rubber, d, or a spiral spring placed within a tapering cup, 0, the lower end of which fits into the spool, and serves as a guide, the nut, '0, being kept in place by means of a lock-nut placed above it.

The lower end of the spindle D fits into a cavity (seen dotted) in the frame A, the cavity containing a piece of rubber or a spiralspring, which serves to force the upper end of the spindle into a cavity in the frame above. The spindle is thus held securely in place, and, with the spool, may be easily removed and replaced when desired.

E is a rod or shaft, operated by a wheel, I, in the rear, for giving, by means of a crank or cranked formation, g, on the said rod in front, the necessary up-and-down and lateral motions to the needle G, to work it in and out of the cloth, and effect the feed of the latter; said needle being freely connected at its top with the crank, g, and working loosely or freely below throughan adjustable guide, h, and slot, 2', of a stationary foot or p'resser, II, attached to the portion G of the frame. This needle isnf a tambour or hook-eyed construction atits point, and.has a flexible barb, and it works through a slot in the table 1, corresponding to the slot 2' of the foot ll. The shaft E is prevented from being revolved in the wrong direction, (whichwould endanger the breaking of the needle or disnrinngcment of the stitchQ by a ratchet-wheel, It, and paw], Z, as seen in fig. 1.

The tabled is supported by an arm, J, pivoted at m to the portion A of the frame, and provided with a stem or projection, 71, the object of which will be hereinafter described. r

The thread, represented by red lines in the drawings, is passed from the spool, 0', through the eye of a spring-guide, p, fig. 3, which is made of brass or other suitable metal, and-is secured to the under side of the cloth-table I. The portion 5 of this guide 2), which is provided with an eye for the passage of the thread, is bent into such form that when the needle G is carried past it, it will yield to the pressure of the needle, and on returning to its original position will draw the thread closely against the side of the needlejust above the barb,

and so present it in the most suitable manner to insure its being caught by the hook or barb of the needle. This portion 5 of the guide 1), by reason of its breadth and the bend given to it, is also rigid in a vertical direction, to rcsistbcing pulled upward by the thread, and so that its point cannot by any possibility be drawn by the tensiorrofthe thread into or through the slot in the table I. The other portion, 6, of the guide 10, which is bent over-and upward, so as to extend into the slot in the table I, also serves to guide the thread, and as the needle ascends, its barb comes in contact with the portion 6 of the guide,'by which its point is pressed into a groove in the shank of the needle, thus securely enclosing the thread within th barb, and preventing anyliability of its escaping therefrom, while the free passage of the needle up through the cloth is insured, as the point of the barb or hook is not exposed, and cannot catch in the cloth as the needle is withdrawn.

The general action of my improved machine is similar to that of certain other machines; the needle in its descent penetrating the cloth, and causing its barb to pass below the loop previously made, and which is now left upon the needle-shank, and in its ascent catching the threadanew, and pulling it in the form of a loop above the cloth, and through the previously-made loop, which is now discharged over the closed barb and off the needle; the needle also, by its lateral movement, feeding the cloth. To secure a sufficiently firm, yet free and readily-adjustable hold of the cloth on the table I, said table, which is carried by the lever or pivoted arm'J, is raised or lowered with the greatest dispatch yet nicety, to suit diii'erent thicknesses of material or other requirements, by means of amilled or other disk, K, turning on a centre atq on the plate a of tlieframe, and of a wedge-shaped or inclined construction on its upper face, the same being arranged below the stem n of the arm J, so that, on turning the disk in a suitable direction, the table I is raised, or, by turning it in an opposite direction, lowered, by its weight and that of the arm J, and in both positions of adjustment a firm base or support given to the table.

What I claim, and desire to secure by Letters Patent, is

The guide-piece p, formed with a spring thread-guide to yield against the pressure of the needle, and then to carry the thread athwart its path, and also with another guide-piece, serving to govern the path of the thread as well'as to close the needle-barb.

I also claim the spring-guide p, in combination with the cloth-table of a sewing-machine, and with afiexible barbed needle, operating substantially as and for the purpose set forth.

I HENRY P. 'LAMSON.

-Witnesses I. E. TEscnEMAcHEn, N. W. STEARNS.

Images