IMPROVEMENTS IN COP RETAINING SPINDLES FOR LOOM SHUTTLES
Year: 1883

page_text: LETTERS PATENT to Alfred Julius Boult of the firm of W P Thompson &
Boult, Agents for Foreign Patent Solicitors of 323 High Holborn in the
County of Middlesex, Engineer for an Invention of "IMPROVEMENTS IN COP
RETAINING SPINDLES FOR LOOM SHUTTLES," a communication from William
Thomas Coggeshall and James Edwin Rice both of Lowell, Middlesex County,
Massachusetts, in the United States of America
PROVISIONAL SPECIFICATION left by the said Alfred Julius Boult at the
Office of the Commissioners of Patents on the 6th March 1883.
ALFRED JULIUS BOULT of the firm of W P Thompson & Boult Agents for
Foreign Patent Solicitors of 323 High Holborn in the county of Middlesex
Engineer IMPROVEMENTS IN COP RETAINING SPINDLES FOR, LOOM SHUTTLES
[a communication from William Thomas Coggeshall and James Edwin Rice
both of Lowell, Middlesex County, Massachusetts, in the United States of
America]
This invention has relation to cop-retaining spindles for loom shuttles, and it
consists first in the construction and novel arrangement in a longitudinally grooved
spindle of a spring fastened by its heel portion in the rear end of the groove and
rising at its upper edge above said groove and provided with a rounded projection
above said groove at its point; second in slotting the bottom of the groove in the
spindle under the point portion of the spring and providing said spring with an
under extension projecting through the slotted portion; third in providing the
grooved spindle with a longitudinal spring rigidly fastened by its middle portion
in the groove of the spindle and having its upper edge projecting from the groove
in rear as well as in front of the fastened portion; fourth in forming a depres-
sion in the upper surface of the spindle on each side of the longitudinal groove
or slot and in providing the spring with a projection at its heel end forming a
stop.
The spindle has a longitudinal groove formed in its upper portion in which is
inserted edgewise a flat spring the upper end of which projects slightly above the

page_text: groove while its heel end is rigidly secured in the rear end of said groove. That
portion of the spring in front of the secured end is raised somewhat above the
bottom of the groove and is provided with edge serrations though this is not
essential to the effective operation of the spring. The free end of the latter has a
rounded projection that allows the thread or filling to pass over without breaking
and its tension is upward so that when the cop is placed on the spindle it receives
constant upward pressure said pressure increasing toward the free end of the spring
and being greatest at or near its extremity. As the thread unwinds lessening the
amount on the spindle the tendency of the spring is to gradually and evenly rise
presenting to the thread or cop, a constantly ascending edge, and thus acting
effectually to prevent the slipping and consequently breaking of the cop.
To provide greater depth of spring at the point portion, it is advisable in some
spindles, to slot the base of the groove under the free end of the spring for a short
distance not greater than two inches, and to form the spring with an under extension
which projecting through the slot below the spindle forms a bearing for the cop on
the underside. In this manner pressure is effected at the upper and under-
sides of the spindle against that portion of the cop which is around the point
portion of said spindle.
In some cases it may be preferred to employ a spring in the groove made with
its upper edge somewhat concave or inclined from the middle portion upward
toward each end fastened therein by its middle portion in a rigid manner by means
of transverse rivets or other means. Or the middle portion of the spring may be
driven into a tight seat formed in the grooved portion of the spindle. The spring
thus fastened to the spindle provides a rear spring branch having an upward
tension, and a front spring branch also having an upward tension, the upper edges
of both branches projecting from the groove or slot
In this manner a heel spring is provided as well as a front spring so that when
the cop is put on the spindle it is held by spring pressure in rear as well as in
front. This double acting spring is designed especially to prevent waste as it will
effectually hold the cop on the Spindle until all the thread has been unwound
therefrom. In some cases it is desirable to provide deep serrations in the upper
edge of the spring, and in order to afford full play thereto depressions are formed
in the upper surface of the spindle on each side of the spring. The spring is
designed usually to be formed with a lug or projection at its rear end which serves
to prevent the cop from being pressed too far back on the spindle.
These spindles are designed to serve several important purposes; to prevent the
cop from slipping and breaking; to obviate the effect of the concussions that occur
when the shuttle strikes the loom pickers and to prevent the thread from breaking
at the cop as it unwinds therefrom.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Julius Boult in the Great Seal Patent Office on the
5th September 1883.
ALFRED JULIUS BOULT of the firm of W. P. Thompson & Boult, Agents for
Foreign Patent Solicitors of High Holborn, in the County of Middlesex, Engineer
IMPROVEMENTS IN COP RETAINING SPINDLES FOR LOOM SHUTTLES" a communi-
cation to me from abroad by William Thomas Coggeshall and James Edwin
Rice both of Lowell Middlesex County, Massachusetts, in the United States of
America
This invention has relation to cop-retaining spindles for loom-shuttles, and it
consists in the construction and novel arrangement in a longitudinally grooved
spindle, of a spring fastened by its heel portion in the rear end of the groove, and
rising at its upper edge above said groove and provided with a rounded projection
above said groove at its point; in slotting the bottom of the groove in the spindle,
under the point portion of the spring, and providing said spring with an under
extension projecting through the slotted portion; in providing the grooved spindle
with a longitudinal spring rigidly fastened by its middle portion in the groove of
the spindle, and having its upper edge projecting from the groove in rear as well
as in front of the fastened portion; in forming a depression in the upper surface
of the spindle on each side of the longitudinal groove or slot and in providing
the spring with a projection at its heel end forming a stop all as hereinafter set
forth. In the accompanying drawings:-Figures 1 and 2 are horizontal sections and
Figures 3 and 4 are plan views of Figures 1 and 2 respectively, of a cop spindle
constructed according to this invention
The letter a designates the spindle of a loom shuttle having a longitudinal
groove b made in its upper portion. c represents a flat spring which is inserted
edgewise in the groove 6 so that it extends longitudinally therein its upper edge
projecting somewhat above the groove. This spring is rigidly secured at its heel
end d in the rear end of the groove by means of two pins e e or by any other
common fastening device. That portion of the spring which is in front of the
rigidly fastened heel is raised somewhat above the bottom of the groove b and is
usually formed with a serrated or notched upper edge but this is not essential to
the effective operation of the spring. The free end of the spring is formed with a
rounded projection g which allows the thread or filling to pass over it without
breaking. The tension of the spring c is upward and when the cop is put on the
spindle, it receives constant upward pressure from the spring said pressure
increasing toward the free end of the spring and being greatest at or near its
extremity. As the thread unwinds lessening the amount on the spindle, the
tendency of the spring is to gradually and evenly rise presenting to the thread
or cop, a constantly ascending edge, and thus acting effectually to prevent the
slipping and consequent breaking of the cop. In order to provide greater depth
of spring at the point portion, it is advisable in some spindles, to slot the base of
the groove under the free end of the spring, for a short distance not greater than
two inches, and to form the spring with an under extension or under bearing edge
which projecting through the slot below the spindle forms a bearing for the cop on
the under side. In this manner pressure is effected at the upper and under sides
of the spindle, against that portion of the cop which is around the point portion of
said spindle.
In some cases it may be preferred to employ a spring c in the groove b said
spring being made with its upper edge somewhat concave, or inclined from the
middle portion upward toward each end. This spring c is fastened in the groove
or slot 6 by its middle portion in a rigid manner, the fastening being accomplished
by means of transverse rivets e e or by means of solder Or the middle portion of
the spring may be driven into a tight seat formed in the grooved portion of the

page_text: spindle. Or any ordinary means of rigidly fastening the spring at its middle
portion may be employed..
If solder is used, the side walls of both slot and spring or either of them may be
notched or recessed to afford a hold to the solder. The spring c thus fastened to
the spindle provides a rear spring branch r having an upward tension, and a front
spring branch falso having an upward tension, the upper edges of both branches
projecting from the groove or slot. In this manner a heel spring r is provided, as
well as a front spring ƒ so that, when the cop is put on the spindle, it is held by
spring pressure in rear as well as in front. This double acting spring is designed
especially to prevent waste as it will effectually hold the cop on the spindle until
all the thread has been unwound therefrom. In some cases it is desirable to provide
deep serrations in the upper edge of the spring and in order to afford full play
thereto, depressions are formed in the upper surfacé of the spindle on each side of
the spring. The spring is designed usually to be formed with a lug or projection z
at its rear end which serves to prevent the cop from being pressed too far back on
the spindle. These spindles are designed to serve several important purposes; to
prevent the cop from slipping and breaking; to obviate the effect of the concussions
that occur when the shuttle strikes the loom pickers; and to prevent the thread
from breaking at the cop as it unwinds therefrom.
I claim as new :-
1 A loom shuttle spindle longitudinally grooved in its upper portion and
having a longitudinal spring, rigidly fastened by its heel end or middle portion
in the groove and rising at its upper edge above said groove substantially as
specified.
2nd A spindle longitudinally grooved in its upper portion, and having the
spring c rigidly fastened by its heel end in the groove and rising at its upper
edge above said groove and provided with the projection g at its free end or point
portion substantially as specified.
3rd A spindle formed with a longitudinal groove b in its upper portion, and
partially slotted through the bottom of said groove near the point end and having
the spring rigidly fastened in the groove with its upper or holding edge extending
out of the groove, and a lower extension adapted to project through the slot
substantially as specified
4th A longitudinally grooved or slotted spindle having a longitudinal spring
rigidly fastened in the groove and formed with a concave upper or holding edge
inclining from the middle portion upward toward each end substantially as
specified.
5th The combination with a grooved or slotted shuttle spindle of a heel spring
rigidly fastened to the spindle in the groove or slot, and having its elastic portion
extending rearwardly and upwardly from the fastened portion and projecting by
its upper edge from the slot or groove substantially as specified
6th The combination in a loom shuttle, with a shuttle spindle having a longi-
tudinal groove and depressions made on each side of the same, of a serrated
cop-holding spring seated in the slot or groove of the spindle, substantially as
specified.
7th The combination with a longitudinally grooved spindle of a longitudinal,
spring seated edgewise in the groove and rigidly fastened therein, and having a
stop projection at its rear end substantially as specified
In witness whereof I the said Alfred Julius Boult have hereunto set my hand
and seal this twenty first day of August in the year of our Lord, One thousand
Eight hundred and Eighty three
ALFRED. J. BOULT (L.S.)