Improvements connected with the Spindles of Spinning and Twisting Machines.
Year: 1891

page_text: Date of Application, 14th July, 1891-Accepted, 22nd Aug., 1891
COMPLETE SPECIFICATION.
Improvements connected with the Spindles of Spinning and Twisting
Machines.
We, THOMAS JAMES MURDOCK, of Woonsocket, in the County of Providence,
State of Rhode Island, Mechanic, and JOSEPH THOMPSON ASHWORTH, of Cylinder,
County of Palo Alto, State of Iowa, Mechanic, both in the United States of
America, 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 :-
This invention relates to spindles of spinning or twisting mechanism and consists
of a bobbin holder to be mounted upon the spindle-our improvements consist of
such an assemblage of parts hereinafter fully described, that the bobbin is readily
doffed yet it is held so firmly that sufficient friction is created to ensure its proper
revolution, while at the same time it is prevented from jumping or becoming raised
by the draft during high speed in the act of filling the bobbin. Furthermore our
improvements consist in creating a receptacle in the holder to contain the bobbin-
head and thereby prevent the yarn from overlapping on the same.
The drawings represent in
Fig. 1 a sectional elevation of a spindle with a bobbin-holder embodying. our
invention:
Fig. 2 is a horizontal section:
Fig. 3 is a perspective view of one of the holding-shoes.
Fig. 4 is a sectional plan with the spring and one shoe omitted to more clearly
show detail in construction.
In the accompanying drawings we have represented the spindle at 2, the whirl
at 3 and the bobbin at 4 with the head at 5. One object in our invention is to
avoid the use of yarn about the spindle, which is frequently employed and occasioned
by the varying size of the head and likewise to compensate for wear caused by
replacing and doffing the bobbin. To obtain this result we have attached upon the
spindle a bobbin-holder 6, which is composed of a cylindrical body or casing closed
at the bottom by the base 8 and formed with two flanges 9, 10, creating an annular
recessed portion 12 in general shape that of a spool. The bobbin holder body 7 is
radially apertured at 13 to receive a series of segmental shoes or holders 14 of a
curvature to conform to that of the bobbin-head. Said shoes are of a size to admit
of movement radially in the apertures, but are furnished with lips 15, which project
beyond the ends of the apertures and contact with the exterior surface of the
recessed part of the holder. A coiled spring 18 in the form of a ring, encircles the
bobbin holder body, and serves to press the shoes radially inward upon the head of
the bobbin. These shoes extend within the holder so far that when the bobbin is in
place the bobbin-head thrusts them outwardly against the pressure of the spring and
the latter is now the active agent to hold the bobbin in place. Conversely, when
the bobbin is doffed the lips at the ends of Baid shoes contact against the body
of the holder and allow them to move inwardly the proper distance, so that the
bobbin when replaced can readily be thrust in between them.
It is to be observed that the shoes are moved radially towards a common center
or towards the longitudinal axis of the spindle, while the spring presses equally
upon all; as a result the tendency is to center the bobbin upon the spindle and hold
said bobbin steady even though the latter may be of larger bore than the size of
the spindle required.
To complete the bobbin-holder and have it present a finished appearance, an
enclosing shell or cover 17 is slipped over the holder proper; said cover rests upon
and is supported at the top and bottom by the flanges 9, 10. In this
way the annular

page_text: spring is concealed and the holder having a smooth exterior finish prevents the yarn
waste or flyings from catching thereupon.
The operation is simply to grasp an empty bobbin insert the latter over the top
of the spindle and thrust it down until the head of the bobbin has entered the holder.
In this not the spring-actuated shoes are thrust outwardly against the spring which
now exerts its pressure.to hold the bobbin firmly in place. When the bobbin is to
be doffed a slight upward pull disengages the shoes from the bobbin-head' and the
shoes now convergo until stopped by their lips 15.
There are several advantages derived from the improvements as above described :
the bobbin-head is contained within the bobbin-holder body and thus prevents'.yarn
from winding about the head, and obstructing or covering the annular groove 16
ordinarily found in filling-bobbins, and which serves to receive a spring when placed
in the shuttle. A further advantage is that this bobbin-holder can be employed to
suit different bobbirs simply by changing the shape of the shoes no change in
bobbin-head is required.
Consequently we do not desire to be limited to any particular shape of shoc, nor
to the spring, but our invention consists in holding the bobbin-head by radially
moving shoes actuated by a spring, or springs, which tends to center said shoes
towards the longitudinal axis of the bobbin.
A further advantage in the employment of radially-moving spring-actuated shoes,
that the bobbin-heads can vary to a considerable extent and still be held firmly
since this difference in the size would be obviated by the elasticity of the spring
and thus permit the shoes to yield more or less according to the size of the bobbin-
head.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is
1st. The combination with a spindle and a bobbin-holder body applied thereupon,
of a spiral spring enclosing said bobbin-holder body and radially moving shoes or
equivalents actuated by said spring to grasp the bobbin, substantially as set forth
and specified..
2nd. The combination with a spindle, of a bobbin-holder composed as follows: a
cylindrical rimmed receptacle apertures in the body thereof, the imperforate
enclosing shell, and the spring-actuated radially-moving shoes sécured to the bobbin-
holder and which grasp the bobbin-head, substantially as and for purposes
described.
3rd. A revoluble spindle, a bobbin-holder fast thereto, and composed of a circular
rimmed receptacle, an annular exterior groove, and radial apertures, the outer cover,
a series of holding-shoes having lips to control their inward movement, and a spring
medium, which actuates said shoes to cause the latter to grasp the bobbin-head,
substantially as explained:
Dated this 2nd day of June 1891.
THOMA
CARETA MILDDOCK
THOMA O
WAVREAD
Dated this 8th day of June 1891.
CATAT
MURDOCK.