An Improved Self-threading Shuttle for Looms for Weaving.
Year: 1894

page_text: Date of Application, 6th Nov., 1894-Accepted, 8th Dec., 1894
[Communicated from abroad by JOSEPH HERBERT NASON, of 13, Richdale
Avenue, Somerville, Machinist, and HENRY MARTYN HEWES, of the Boston
Music Hall Society, Boston, Accountant, both in the State of Massachusetts,
United States of America.]
An Improved Self-threading Shuttle for Looms for Weaving.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby
declare the nature of this invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
The invention is an improved self threading shuttle and consists in a doubly slanted
groove with its front end at the centre line of the shuttle, but slanting backward
to one side of the shuttle and also sidewise from top to bottom of the shuttle.
Through this groove the yarn is carried to a feeding pin in a recess at the front end
of the groove, by means of which pin the thread is led to the eye.
feature of the invention is the self threading tension device described below.
In the accompanying drawing
Another
Figure is a view, in perspective, of the front end of one of my improved
shuttles, showing my tension device in dotted lines;
Figure 2 is a plan of Figure 1;
Figure 3 is a section on line 3-3 of Figure 2 ;
Figure 4 shows a sectional view of a modified form of my tension device ;
Figure 5 shows another form of my tension device.
In the drawing A, is the body of the shuttle, B is the bobbin, and the yarn
upon that bobbin; C is the slanting groove, having a double slant, being at its
front end at the middle line of the shuttle but slanting away from that line and
also slanting sidewise from top to bottom; D is the feeding pin, E the eye and
F the tension device. The tension device is a feature of the invention being self
threading and adjustable.
The tension device consists of two friction surfaces f f¹, which are two hemi-
spheres, slightly flattened at the poles, where they are in contact and pressed
together by the spring f2. G is a screw block in the body of the shuttle, S is an
adjusting screw, working in that serew block, and which carries guide pin S*
and has a shoulder S₁ upon its upper end. The pin S2 passes through ƒ ƒ'
and serves to retain them in the cavity in the body of the shuttle designed for
the tension device and at the same time serves as a guide pin for the yarn.
By moving the screw S a greater or less pressure is put upon spring f and
thus upon friction surface f¹. After the proper adjustment is secured the
check nut g is turned to hold screw S (see Figure 3). Another form of the
tension device is shown in Figure 5, which consists of two friction surfaces ff,
1 being backed up by f³. Connecting the two parts ff¹ is a spring f² which
constantly tends to separate the two friction surfaces ff'. The adjustment
is effected by means of the screw S the shoulder S₁ at the junction of the
screw S, and the pin S2, bears against the bottom of ƒ and as screw S is raised
forces closer to f' against the resistance of spring f2.
When the screw S
is lowered, spring f separates f and f¹.
In the form of tension device shown in Figure 3, the pressure is secured by a
spring which, while giving any required tension will yield at need to permit small
knots or enlargements in the yarn to pass. In some mills it is considered desirable

page_text: to prevent any knotted or uneven yarn from being woven into the goods. The
modified form of tension device shown in Figure 5, accomplishes this end by
organizing the parts so that the friction surfaces ff are positively adjusted in
their relations and by adjusting the distance everything above the required size
may be prevented from passing through the tension device.
1
Another modification is shown in Figure 4, which has a sleeve S³ surrounding S
attached to the lower part of f¹, the sleeve and friction surface revolving slowly
in use and preventing the yarn from cutting a groove in S².
The operation is a follows: The yarn bis led from the bobbin B through
groove C around the feeding pin D and backward through groove C. The yarn
when drawn will now travel down pin D to eye E passing into the tension device F,
the guide pin S2 causing the yarn to adjust itself at the proper point within the
tension clamp and serving also to prevent the yarn from drawing direct to the
eye E and out of the surfaces fƒ³.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
First. The improved self threading shuttle having a doubly slanted groove; a
guide pin; a feeding pin and an eye, substantially as shown and described.
Second. The self threading, adjustable tension device, consisting of two friction
surfaces connected by the guide pin, adjusting screw and spring, substantially as
shown and described.
J
N 1004
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.