US548497A

US548497A - Thimble thread-cutter

Info

Publication number: US548497A
Authority: US
Publication date: 1895-10-22
Anticipated expiration: 1912-10-22

Description

(No Model.)

. M. J. AMSDEN. l

, THIMBLB THREAD CUTTER. No. 548,497. Patented 0011.22, 1895.

WITNESSES 1.7V V'EJV' T OR www I flitm'nuy PATENT rricn.

MARGARET J ANE AMSDEN, OF WATERTOWN, NEXV YORK.

THIMBLE TH READ-CUTTER.

SPECIFICATION formingpart of Letters Patent No. 548,497, dated October 22, 1895.

Application filed June 22, 1895. Serial No. 553,700- (No model.)

To aZZ whom it may concern.-

Be it known that I, MARGARET JANE AMS- DEN, a citizen of the United States, and aresident of \Vatertown, in the county of Jefferson and State of NewYork, haveinvented certain new and useful Improvements in Thimble Thread-Gutters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings isa representation of a perspective View of invention applied. Fig. 2 is a section through thimble.

The object of this invention is to provide a thread-cutting attachment for sewing-thimbles, which can be readily applied to thimbles of the ordinary construction, whose formation is such that it is self-guarded or free from any point, hook, or projection of a nature which, through incidental or careless manipulation of the thimble, can catch in the work or scratch or abrade the skin, and which is convenient and effective.

With this object in view the invention consists in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claim.

Referring to the accompanying drawings, the letter A designates an ordinary thirnble, and 13 my improved thread-cutting attachment. Said attachment consists of a small thin blade having parallel lateral faces, whose planes are perpendicular to the periphery of the thimble, and which are perfectly smooth, with the exception of that portion of one face which constitutes the cutter proper. The inner edge a of said blade from its lower end is straight to the point I), where is a small projection, which extends through an opening in the shell of the thimble, in which opening it is firmly secured by being brazed, soldered, or, as shown, by having its inner end upset to form a rivet head, which is filed off substaniially flush with the inner surface of the said shell. The outer edge of said plate at its lower portion is beveled down, as indicated at c, to meet the line of the inner edge a for the purpose of forming an acute point, which is the upper edge 72, of the blade.

forcibly entered underneath the usual rim or flange f of the thimble. portion 0 the said outer edge is formed with an inward odset d, from which it forms a convex curve 6, which terminates at the point of a small projection g, which is extended above This upper edge portion, together with the inner edge of the projection g, is beveled upon one face to form the cutting edges of the device, an oblique notch for the thread being usually formed where the two beveled surfaces meet.

It will be observed that the maximum point to of the curve e is at or near the base of the projection g, and that above this point the said curve approaches the periphery of the thimble, whereby the point of said projection is considerably inside of a line a: tangential to the said maximum point of the curve 6 and touching the periphery of the thimble at the point z; or, in other words, if such line be considered as representing a surface upon which the thimble rests the only points of contact with such surface will be at the points w and 2. It will be apparent, therefore, that the said projection is guarded by the said curve from catching into the work or into the skin.

The shoulder formed by the inward oifset (1 forms an abutment for the tool employed in forcing the point of the device into engagement with the rim or fiangefof the thimble.

In use the thimble is placed on the finger with the attachment at the back and the thread is cut by moving the finger downward over the thread, which is held firmly.

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

The combination with a thimble, of the herein described thread cutting attachment therefor, said attachment consisting of asmall metallic, parallel faced, blade having the point at the lower end which engages the base rim or flange of the thinible, the inward projection at its upper inner edge which is secured in the shell of the thimble, and the pointed projection g at its upper outer portion, which projection extends beyond the upper edge of the blade in the plane thereof and which, together with the upper edge portion, is beveled upon one face to form the cut- Above said beveled ICO ting edges of the attachment, the outer edge ence of the thimhle at its upper portion,sub- 10 of said blade having the convex curve 6 which stantially as and for the purpose specified. terminates at the point of said projection and In testimony whereof I aftix my signature which from its maximum point at or near the in presence of two Witnesses.

base of such projection approaches the periphery of the thimble, whereby the point of MARGARET E AMSDEN' the projection is brought considerably within Witnesses: a line tangential to the maximum point of EVELYN GOODALE, the said curve and touching the circumfer- A. L. GRANT.