Improvements in Loom Shuttles.
Year: 1886

page_text: Improvements in Loom Shuttles.
We ROBERT HERD SHAND of South East Corner, Alder and Norris Streets in
the City of Philadelphia State of Pennsylvania United States of America Mill
Superintendent and DAVID SMALL PRESTON of No: 520 West 50th Street in the
City of New York State of New York United States of America, Machinist 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 and accompanying drawings:-
Our Invention relates to that class of loom shuttles which are not provided with
tongues the cop in each case being placed directly in the chamber of the shuttle
and being held therein by a cover strip.
In shuttles of this class the cop is sometimes retained by a metal spring plate
and in other cases by a strap consisting of a web of elastic fabric secured at one
end to the shuttle body and having at the other end a hook which engages with
a transverse wire or bar in the shuttle. The objection to the metal retainer is its
liability to break or fly out and cut the warp while on the other hand the elastic
fabric is rapidly worn out and has a tendency to lose or partially lose its elasticity
after a short time. The object of this invention is to overcome these objections
and to this end we keep the cop in place by means of a retaining strap of leather
or other flexible but inelastic material having an elastic or spring connection with
the shuttle body at one end.
In the accompanying drawings Fig. 1 is a longitudinal section of a loom shuttle
fitted with our improvements, Fig. 2 is a plan view of the same. Fig. 3 is a
detached perspective view of the elastic attachment for the cover strip, detached
from the shuttle and Fig. 4 is a view showing a modification.
In the said drawings A. represents the body of the shuttle which is provided near
one end with the usual delivery eye a and has formed in it a chamber b. for the
reception of the cop x. which delivers from the end as is usual.
The said cop
is confined in the chamber b. by the cover strap B. and is prevented from slipping
longitudinally by reason of the serrated shell of the shuttle body. The strap B. is
provided at one end with a hook d. which engages with a cross wire f. The other
end of the strap is fastened to the periphery of a drum g. which is free to turn
upon a transverse pin h which is fixed in the shuttle body. The said drum is acted
upon by a spring i. which is coiled around the reduced end of the said drum one
EDC11

page_text: end of this spring being connected to the drum and the other end to a plate m
which in the example has bevelled edges which fit in a dove-tailed recess formed in
the shuttle body near one end of the chamber b. The tendency of the spring i. is
to turn the drum in the direction of the arrow in Fig. 1 and thereby to impart
tension to the strap B. whereby the latter is caused to bear firmly upon the cop x.
When it is desired to release the end hook d. of the strap from the retaining bar f.
in order to lift the strap when it becomes necessary to remove the cop or to insert
a fresh one the spring yields and permits the drum to rotate to the required extent.
If not considered to be necessary the plate m may be dispensed with and the outer
end of the spring i. be secured in an opening formed directly in the shuttle body,
but the use of the said plate is preferred as it provides a better bearing for the end
of the spring and permits the fitting together of the parts before their application
to the shuttle, all that is then necessary being to secure them in position by
inserting the pin h. If desired two plates m may be used as shown in Fig. 4 these
plates carrying the pin or the ends of the drum being adapted to bearings in the
plates. Suitable means other than the hook f..may be employed to secure the free
end of the strap to the shuttle body so long as the fastener employed can be readily
disconnected.
。 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:
1. A loom shuttle having a flexible but inelastic or only slightly elastic strap for
retaining the cop in the recess of the shuttle body one end of the strap being
attached to a spring drum and the other end being adapted to hook on to a wire
or fixed part in the shuttle or to be otherwise suitably secured substantially as
described and indicated.
2. The spring drum and carrying-plate and the spring attached by one end to
the drum and by the other end to the said plate, the whole forming a tension
device for the retaining strap of a loom shuttle and being adapted for ready intro-
duction into and removal from the recessed shuttle body substantially as herein
described and as indicated in the drawings.