Improvements in Drop Box Looms.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Drop Box Looms.
I, JOHN BRIERLEY HOWARD of Penny Bank Chambers, Halifax in the
County of York Patent Agent, do hereby declare the nature of this invention,
which has been communicated to me by Otto Mueller, of Harzdorf near
Reichenberg Bohemia, in the Empire of Austria, Machine Maker, and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The power looms having positive motion of the drop boxes the tieing up of
broken weft threads is rendered tedious on account of the fact that it is very
difficult to get at any one of the shuttles, and in order to do so it is necessary to
turn or move the eccentric back, so as to bring the required box and shattle into a
convenient position.
The object of the present invention is to do away with this inconvenience by
enabling the weaver to lift or raise the box by hand independently of the driving
motion, so that the shuttle can easily be got at.
In the main this is obtained through either the connecting or shuttle box rod, or
the eccentric rod being made so that they can be disconnected.
The present invention also relates to improved couplings which provide for
retaining the box in the position required for the tieing up of broken weft.
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the accompanying drawings,
in which :-
Fig. 1 is a side view of a power loom, with the connecting or shuttle box rod of
fhe driving motion in two parts.
Fig. 2 is a side elevation drawn to an enlarged scale of part of the box rod.
Modifications of the connections of the two parts of the rod are shown in Fig. 3
in side elevation, and in Figs. 4 and 5 in side elevation and detail, and in Fig. 6
in side elevation.
Figs. 7. and
show a side view and a cross section, and Fig. 9 a plan view,
shewing the manner in which the box lever or arm, which acts upon the shuttle
box rod, is connected for purpose hereinafter set forth.
Fig. 10 is a side view of a loom, the shuttle box or rod of which is provided
with a coupling that enables the boxes to be retained in different heights or
positions.
:
The coupling itself is illustrated in Figs. 11, 12, and 13 in side view, section
and front elevation.
Another method of retaining the boxes in the desired position is represented in
section by Fig. 14.
In Figs. 1 and 2, the connecting or shuttle box rod "a" is cut near its point
of connection with the box lever or arm "6" of the eccentric shaft "c" The
lower part
"a" of this rod "a" is provided with a stud, peg, or pivot d, the upper
part a with a bore or hole e. The rod can only be divided when a cross pin or
peg has been taken out by hand.
As soon as this is done, the drop boxes g can be raised by hand according to
to
requirements without necessity of changing the position of the box lever or arm, b.
The parts a¹ and a² of the connecting rod may also be coupled by a bayonet
fastening as shewn by Fig. 3. Each part a' and a² of the shuttle box or connecting
n
27

page_text: rod is provided with a peg a3 and-a, which are received in the horizontal or
inclined slots h¹ and 2 in the shell /.
By means of the handle 3, the shell can be turned with facility. In this form
of connection, the locking into each other of the parts d, e of the connecting
rod a is not necessary. In Figs. 4 and 5 the studs or peg d and the bore e are
employed.
The pin or peg is replaced by a catch i, which is hinged to one of the parts of
the rod a², and holds the parts a² and a' together when passed over a nose of the
other part a' (see Fig. 6) the rods a¹ and a lock into each other by means of teeth,
or projections and recesses. The teeth and recesses engage with each other, the
lower rod a¹ having a projection or tooth as, which locks into a corresponding
recess of the other rod a. Over both parts of the rods a', a² is a shell k with
handle for sliding the shell k from over the junction of the rods a¹ and a³. A
projection or pin a7 on the lower rod a¹ prevents the shell k from sliding down
too far.
In lieu of making the shuttle box rod in two lengths, I in some cases prefer to
divide the box lever b, and hinge the divided portions together, providing for the
joint being flexible or rigid at will, and when flexible the joint allows of the rod a
being moved upwards or downwards without effecting the eccentric shaft c.
C
The box lever or arm 6 of the eccentric shaft is shewn in Figs. 7 and 8 as
vertically cut or divided. On the upper and lower side of the lever the half of a
hinge joint is screwed to each side of the joint or cut portion. The hinge joint
bolts are, however, replaced by moveable pins or pegs m (see Fig. 8). In Fig. 9
both parts of the lever block into each other, so that together with a bolt n they
form a joint. By means of a shell o, the joint is made rigid, and secure when
required.
If when the boxes have been raised, it is desired to retain them at different
heights, in order to tie up the weft threads, the coupling shewn by Figs. 10, 11, 12
and 13 is employed. It consists of a hollow cylinder p, which is joined loosely by
a peg with the lever b. In this hollow part p is received a rod r, which is
connected with the shuttle box rod a. The rod has grooves in it, and to the
hollow part pa catch s is hinged, which is under the influence of a springs, so
that its nose entering a hole p¹ of the part p, is pushed into one of the grooves.
The lifting out of the nose is effected by means of a hand lever t, t' which can
be turned round a pivot u on the hollow part p.
?"
The arm has a nose t' which acts underneath the catch s. The rod may also
be arranged according to Fig. 14 with teeth 2. These teeth gear with those of a
wheel, which is fixed upon a shaft w in the bracket a of the hollow part p, and is
-set in motion or turned by means of a hand lever y. An unintentional downward
motion of the rod is prevented by a catch or pawl z, which is loosely con-
nected with the hollow part and catches into the teeth of the wheel.
Having now particularly described and ascertained the nature and object of my
said invention, and in what manner the same is to be performed, I declare that
what I claim is :-
1. A positive shuttle box motion which allows of the raising of the shuttle
boxes, independent of the position of the eccentric shaft c, for the purpose of
tieing up broken weft threads; this raising to be effected by making either the
draw rod a, or the arm of the eccentric shaft c in two or more parts, connected
in such a way that they can be easily disconnected as herein described, and
substantially as illustrated by Figs. 1 to 9 of annexed drawings.
2. In a positive shuttle box rod, consisting of a hollow cylinder p, into which is
received a rod r held in position by a nose s², which is provided with spring and
catches into one of a series of grooves of the rod r as herein described, and as
illustrated by Figs. 10 to 14 of the accompanying drawings.
3. In a positive shuttle box motion as described, the tooth wheel working into
:

page_text: teeth of the rod r, and held in position by a catch, as and for the purpose herein
described, and as illustrated by Fig. 14 of the accompanying drawings..
Dated this 13th day of July 1803
J. BRIERLEY HOWARD,
Applicant.