US439488A

US439488A - Thread-cutter

Info

Publication number: US439488A
Authority: US
Publication date: 1890-10-28
Anticipated expiration: 1907-10-28

Description

UNITED STATES PATENT OFFICE.

JAMES N. DODGE, OF SPRINGFIELD, MASSACHUSETTS.

TH READ-CUTTER.

SPECIFICATION forming part of Letters Patent No. 439,488, dated October 28,1890.

Application filed April 2, 1890. Serial No. 346,347- (No model.)

The object of my invention is to provide a cheap and eifective thread-cutter, designed for insertion in spools, which is capable of being inclosed within the spool when not required for use and of being partially withdrawn therefrom when its use is desired, whereby economy of space is secured and catch-points prevented.

To this end the invention consists in a thread-cutter of a certain novel construction and contour, substantially as hereinafter described, and particularly set forth in the subjoined claims.

Referring to the drawings, A designates an ordinary spool on which silk and thread are wound for sale and convenient use; B, the

center hole thereof, and O the thread-cutter, which is made of a single piece of elastic or springy metal, bent to form the curved knife D at its upper end, the vertical parta extending downward from one end of said curved knife, the bottom part b curved in an opposite direction to that of said knife D and of the same or substantially the same diameter as said knife, the part 0 extending from said curved bottom part upward toward the free end of said knife in an inclined direction and terminating short of and out of horizontal plane with the same, the curved part (1 extending inward from the upper end of said part c, and the part 6 inclining inward and downward toward said part c from the inner end of said curved part d, all as shown in Fig. 1.

The method of use is as follows: The threadcutter being inserted into the center hole 13, its parts a 0 will. act as a spring and impinge with such force upon the walls of said hole as to hold the cutter firmly, whether the same is partially withdrawn to cut off the thread or located entirely within the spool, and to resist the pull of the thread when excision takes placea It is obvious that the diameter of the knife D and bottom partb is the same as that of the hole 13 of the spool. The object in in clining the part c outward is to increase its impinging force on the walls of the spool, and the parts cl and 6 also act to give it greater impinging power. When inserted in the spool it is vertical and parallel with the part a, which is in contact with the opposite wall of the hole B, as shown in Fig. 2.

I do not Wish to be understood as claiming, broadly, a thread-cutter for use in connection with spools having a spring part for insertion with and impinging against the walls of the hole thereof, as I am aware that such threadcutters have been heretofore constructed; but none of the thread-cutters heretofore constructed have been capable of being entirely inclosed within the spool when its use is not desired and partially withdrawn therefrom for use, the advantages of which construction are above set forth.

Having now described myinvention, what I believe to be new, and desire to secure by Letters Patent, is--- 1. As an improved article of manufacture, a thread-cutter capable of complete insertion within the hole in a spool, and also of partial withdrawal therefrom, constructed of a single piece of elastic metal and having side parts for impinging against the walls of the opening in a spool, and a knife extending from the upper end of one of said side parts toward the upper end of the other and of such size as to pass within said opening in the spool.

2. As an improved article of manufacture, a thread-cutter capable of complete insertion within the hole in a spool, and also of partial withdrawal therefrom, constructed of a single piece of elastic metal and having a knife at its upper end, a vertical part ext-ending downward from one side thereof, a bottom part, and a part extending upward in an outwardly-inclined direction from one end of said bottom toward the free end of said knife, said bottom part and knife being of a size to be capable of passing within the hole in a spool.

3. As an improved article of manufacture, the herein-described thread-cutter capable of complete insertion Within the hole in a spool, ward toward said part c, all substantially as and also of partial Withdrawal therefrom, shown and described. made of a single piece of spring metal and comprising the curved knife D, vertical part JAMES N. DODGE. 5 a, curved bottom part b, upwardly-extending \Vitnesses:

outwardly-inclined. part c, inwardly-extend- W. F. ADAMS,

in g curved part d, and part e, inclining down- F. A. NICKERSON.