IMPROVEMENTS IN LOOM SHUTTLES
Year: 1877

page_text: LETTERS PATENT to Dexter Harrington Chamberlain, of Boston, in the County
of Suffolk, and State of Massachusetts, one of the United States of America,
Engineer, for the Invention of "IMPROVEMENTS IN LOOM SHUTTLES.”
COMPLETE SPECIFICATION filed by the said Dexter Harrington Chamberlain
at the Office of the Commissioners of Patents on the 6th April 1877.
DEXTER HARRINGTON CHAMBERLAIN, of Boston, in the County of Suffolk, and
State of Massachusetts, one of the United States of America, Engineer. "IMPROVE-
MENTS IN LOOM SHUTTLES."
My Invention relates to improvements in loom shuttles, and consists, in com-
bination with the ordinary hinged head, in a loom shuttle of a tubular metallic
spindle made in one piece with or secured to the head aforesaid, and a movable
tapering metallic tube or sleeve located outside of the tubular metallic spindle; to
the outer and closed end of the said tapering metallic sleeve is secured a slender rod
or metallic wire that passes through the hollow metallic spindle; the rear end of
said rod or wire is provided with a hub or head, between which and a support in
the
the hollow metallic spindle is located a compressible coiled spring;
cop is placed
upon the outside of the hollow tapering and moveable metallic tube, by which
arrangement the said metallic tube and the cop upon it is at liberty to move
forwards when that end of the shuttle that is not attached to the spindle is struck
by the picker; and by this arrangement the breaking of the cop is effectually
prevented, thus saving a great deal of unnecessary waste.
There are several advantages in my Invention over the ordinary devices for pre-
venting the breaking of cops, one of which is that the only movable part of my
Invention is the very light tapering tube on which the cop is secured; and being so
light, even a very slight blow on the shuttle end will set the said light and hollow
tapering tube in motion, which is a great advantage over the ordinary ones, in
which generally the whole of the heavy spindle had to be set in motion to accom-
plish the desired result; and in such case when the blow on the shuttle was not
sufficient to overcome the inertia of the whole spindle mass the cop would break
before such inertia would be overcome. This is obviated in my Invention, where
the spindle proper is stationary and provided with a very light and hollow case, on

page_text: which the cop is secured, and which hollow tube and its cop is movable and
yielding as soon as a blow, whether slight or powerful, is given to the shuttle.
Another advantage of my Invention is that when the movable tapering cop
tube is on its seat on the hollow spindle it forms as it were a solid piece with the
same, but as soon as the cop tube is released ever so little it is free to move some-
what to either side of the hollow spindle, by which the outer end of the сор tube
will automatically direct itself to the very spot on the shuttle end on which the
blow is given; and as the shuttle point is not always in a line with the centre of
the spindle it will be seen that by this arrangement the cop tube will always move
centrally towards the point of the shuttle, even if the latter should be out of true
with the centre of the spindle and cop tube; this is also a great advantage over
ordinary spindles, as the cop is vory liable to break, even if it is yielding, if the
blow is struck on one side of the centre line of the cop and its spindle without any
provision for a yielding motion sideways.
On the accompanying Drawing is shown a central longitudinal section of a
shuttle with my improved spindle.
a represents an ordinary shuttle; and b, its head, the latter being hinged at c,
as shown; d represents the hollow tapering metallic spindle secured to the head b
in its rear end; e represents the movable hollow tapering cop tube surrounding the
metallic spindle d, and having in its forward end secured the end of a light rod or
wire that passes through the central hole d¹ in the spindle d, and is provided in
its rear end with a small head, or hub, or nut g, between which and the end of the
central chamber is located a compressible spring h, as shown; i represents the
cop. It will thus be seen that the cop and its cop tube e, with its central wire or
rod f, are the only parts that are free to move forwards when a blow is given to
the shuttle, the rest being stationary, and as soon as the blow is over the cop
and its tube and rod are automatically returned to their proper relative positions
by means of the spring h acting on the enlargement g on the end of the rod or
wire f.
What I wish to secure by Letters Patent and claim is,-
1st. In combination with the hollow spindle d, d, d", and its head b, of the
moveable tapering cop tube e, with its rod or wire f, g, and the spring h, as and
for the purpose set forth and described.
2nd. In a shuttle, the combination of a stationary spindle d and a yielding cop
tube e, as and for the purpose set forth.
In witness whereof, I, the said Dexter Harrington Chamberlain, have here-
unto set my hand and seal, this 22nd day of March, 1877, A.D.
DEXTER HARRINGTON CHAMBERLAIN
(LS)