Year: 1886

page_text: Date of Application, 25th Mar., 1886.
Complete Left, 23rd Dec., 1886.
Complete Accepted, 25th Jan., 1887.
I, DAVID MORRISON, of Commercial Road, Hawick in the County of Roxburgh,'
Commission Agent, do hereby declare the nature of this invention to be as follows:-
My invention relates to weft-stop apparatus for looms, of the kind described in the
Specification of Letters Patent No. 1545 of 1884 granted to me, and it has for object
improvements whereby the weft fork or needle is brought into the operative position
at the proper time and as it falls is prevented from vibrating or rebounding and
thereby failing to act upon the parts which serve to stop the loom when the weft fails
or breaks, and also whereby the needle is prevented from rising through the warp
until the slay has nearly completed its backward movement and the shuttle is about to
be thrown. Upon a pin or spindle, carried by a bracket piece upon the slay of the
loom I fix or fit a small block or tuinbler which serves to carry the weft fork or needle
and upon which are two arms which may be in the form of a bell-crank, one of said
arms being acted on to tilt upwards the fork from the horizontal or inclined position
in which it rests in the shuttle race or on the weft shot to the vertical or nearly vertical
position from which it drops on to the succeeding weft shot, while the other arm
forms or is formed with a heel piece by means of which the downward movement of
the needle is initiated and which also serves to prevent the needle rising through the
warp before the proper time. The bell crank or tumbler is actuated by a bar or bolt
which may be fitted to slide horizontally or vertically in the bracket piece as in the
weft stop apparatus described in my former Specification above mentioned, or, by a
bell crank or cam lever fitted to oscillate on a centre on the bracket piece. The
sliding bolt or oscillating lever has formed on it a suitably shaped cam piece or is bent
so that when moved upwards or forwards it acts on the first mentioned arm of the
bell crank or tumbler on the weft fork spindle and tilts up the weft fork and retains it
while the heel piece on the second arm passes partly under or into a recess in the
acting part of the bolt or lever, and on the return movement the heel piece is struck
thereby or by the bend on the bolt or lever to tilt downwards the weft fork which is
then permitted to fall by its own weight. When the tumbler has thus been tilted to
bring down the needle it is prevented from rising accidentally by the end of the
actuating bolt or lever towards which the heel piece on the tumbler projects and by

page_text: which its movement is barred until the return movement of the actuating bolt or lever.
The heel piece thus serves the double function of initiating the downward movement
of the weft fork and of preventing it from rising prematurely and being struck by
the shuttle or catching on the cloth. Upon the sliding bolt or oscillating lever is
formed a catch piece which, when the weft is absent and the weft fork is not thereby
prevented from descending, engages with one of the arms of the tumbler on the weft
fork spindle and arrests said bolt or lever in its return movement and retains it or a
knob or pap thercon in a position in which, on the movement of the slag towards the
breast beam, the usual "knock-off" lever is struck thereby to stop the loom. When
the weft shot is present and the weft fork is held up by it the catch piece on the
sliding bolt or cam lever fails to engage with the catch or tumbler arm on the weft
fork spindle and the bolt or lever or the knob or pap thereon passes into a position in
which it does not come into contact with the "knock-off" lever of the loom. The
sliding bolt or oscillating cam lever is operated to tilt up the weft fork as the slay
moves back from the fell of the cloth by means of a strap or cord attached to the loom
frame and acting either directly or through a lever on the sliding bolt or cam lever,
or said bolt or lever may be acted on by a wedge link or tapered bar connected to the
loom frame and passing through a guide slot in the bracket piece, or in the end of the
sliding bolt or cam lever, or in a separate lever or moving part arranged to act
thereon. The wedge link or tapered bar may be fitted in a vertical, horizontal or
inclined groove and is kept as low as possible to avoid cutting and weakening the slay
of the loom. The return movement of the sliding bar or oscillating lever may be
effected by gravity or by a spring. The spindle upon which the weft fork is carried
may be so fitted that when the fork is raised the spindle is quite loose and permits of
the ready dropping of the fork whose weight alone rests on the weft thread but when
the fork falls to about the horizontal position, owing to the absence of the weft, the
spindle is held by friction to prevent the fork vibrating or rebounding and thereby
failing to act properly. For this purpose a cam piece may be fitted or formed on the
spindle or upon the bearing bracket carrying the spindle in such a position as to be
operative only when the weft fork drops below the line of the weft shot; or the
spindle may be screwed and passed through a tapped bearing so that an endwise
movement is given to the spindle in turning to such an extent as to bring into
frictional contact a lock nut or collar on the spindle with the side of the bearing
bracket or instead of so fitting the spindle, it may be fixed and the bell crank or
tumbler carrying the weft fork may be loose upon the spindle, or be secured thereon
and similarly kept from vibrating by a cam piece or by lock nuts. This improvement
whereby the vibration of the weft needle is prevented when it drops below the line of
the weft shot is applicable in connection with other forms of weft stop apparatus in
common use in tweed looms and other looms.
CRUIKSHANK & FAIRWEATHER,
Glasgow, Agents.

page_text: I, DAVID MORRISON of Commercial Road, Hawick, in the County of Roxburgh
Commission Agent, 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:-
My invention relates to weft stop apparatus of the kind described in the Specifica-
tion of Letters Patent No. 1545 of 1884 granted to me, and it has for object
improvements whereby the weft fork or needle is brought into operative position at
the proper
time and as it falls is prevented from vibrating or rebounding and thereby
failing to act upon the parts which serve to stop the loom when the weft fails or breaks,
and also whereby the needle is prevented from rising through the warp until the slay
has nearly completed its backward movement and the shuttle is about to be thrown.
As represented in front elevation at fig. 1, in plan at fig. 2, in sectional side elevation
at fig. 3, and in detail at fig. 4, of the annexed drawings, I fit or fix upon a pin or
spindle A, carried by a bracket piece B, upon the slay of the loom a small block or
tumbler C, which serves to carry the weft fork or needle D and upon which are two
arms ce¹, which may be in the form of a bell crank, one c of said arms being acted on
to tilt upwards the fork from the horizontal or inclined position in which it rests in
the shuttle race or on the weft shot to the vertical or nearly vertical position from which
it drops on to the succeeding weft shot, while the other arm c¹ forms or is formed with
a heel piece, by means of which the downward movement of the needle is initiated,
and which also serves to prevent the needle rising through the warp before the proper
time. The bell crank or tumbler C, is actuated by a bar or bolt E, which may be
fitted to slide horizontally, but in the example illustrated slides vertically on the
bracket piece B, as in the weft stop apparatus described in my former Specification
above mentioned, or it may be actuated by a bell crank or lever fitted to oscillate on
a centre on the bracket piece. The sliding bolt, E, or oscillating lever has formed on
it a suitably shaped cam piece or shoulder e, or is bent so that when moved upwards
or forwards it acts on the first mentioned arin c of the bell crank or tumbler C, on the
weft fork spindle A, and tilts up the weft fork D, and retains it, while the heel piece
formed by the second arm c', passes partly under or into a recess or slot e¹, in the
acting part of the bolt or lever E, and on the return movement the heel piece c¹, is
struck by the upper end of the slot in the bolt or lever to tilt downwards the weft
fork which is then permitted to fall by its own weight. When the tumbler C, has
thus been tilted to bring down the needle D, it is prevented from rising accidentally
by the end of the actuating bolt or lever E, towards which the heel part c', on the
tumbler projects and by which its movement is barred until the return movement of
the actuating bolt or lever. The heel piece c¹, thus serves the double function of
initiating the downward movement of the weft fork and of preventing it from rising
prematurely and being struck by the shuttle or catching on the cloth. Upon the
sliding bolt E, (or the oscillating lever) is formed a catch piece E¹, which, when the
weft is absent and the weft fork is not thereby prevented from descending engages
with a projection 2 on the arm c of the tumbler C, on the weft fork spindle and arrests
said bolt or lever E, in its return movement and retains it or a knob or pap E' thereon
in a position in which on the movement of the slay towards the breast beam the usual

page_text: "knock-off" lever F is struck thereby to stop the loom. When the weft shot is
present and the weft fork D, is held up by it the catch piece E² on the sliding bolt or
cam lever fails to engage with the catch or tumbler arm c¹, on the weft fork spindle and
the bolt or lever or the knob or pap thereon passes into a position as represented by
the dotted lines in figure 3, in which it does not come into contact with the "knock off"
lever of the loom. The sliding bolt E (or the oscillating cam lever) is operated to
tilt up the weft fork as the slay G, moves back from the fell of the cloth by means of
a strap or cord attached to the loom frame and acting either directly or through a
lever on the sliding bolt or cam lever, or said bolt or lever may be acted on as shown
by a wedge link or tapered bar H, connected to the loom frame I, and passing through
a guide slot B', in the bracket piece B, or in the end of the sliding bolt E, or cam
lever, or in a separate lever or moving part arranged to act thereon. The wedge link
or tapered bar H, may be fitted in a vertical, horizontal, or inclined groove and is kept
as low as possible to avoid cutting and weakening the slay of the loom. The return
movement of the sliding bar E, or of the oscillating lever may be effected by gravity
or by a spring. The spindle upon which the weft fork is carried may be so fitted that
when the fork is raised the spindle is quite loose and permits of the ready dropping of
the fork whose weight alone rests on the weft thread but when the fork falls to about
the horizontal position owing to the absence of the weft the spindle is held by friction
to prevent the fork vibrating or rebounding and thereby failing to act properly. For
this purpose a cam piece may be fitted or formed on the spindle or upon the bearing
bracket B, carrying the spindle in such a position as to be operative only when the
weft fork drops below the line of the weft shot; or the spindle may be screwed and
passed through a tapped bearing or bearings b, so that an endwise movement is given
to the spindle in turning, to such an extent as to bring into frictional contact a lock
nut a, or collar on the spindle A, with the side of the bearing bracket B; or instead
of so fitting the spindle, it may be fixed and the bell crank or tumbler carrying the
weft fork may be loose upon the spindle, or be screwed thereon and similarly kept
from vibrating by a cam piece or by lock nuts. This improvement whereby vibration
of the weft needle is prevented when it drops below the line of the weft shot is
applicable in connection with other forms of weft stop apparatus in common use in
tweed looms and other looms.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
1. The combination of parts constituting the improved weft stop apparatus for
looms substantially as herein described with reference to the annexed drawings.
2. In weft stop apparatus for looms the "tumbler " C, constructed and arranged
to operate substantially in the manner herein set forth with reference to the annexed
drawings.
3. In weft stop apparatus for looms, a spindle for the weft fork carrier or tumbler
screwed in one or both of its bearings and provided with lock nuts, or the described
equivalents of such arrangement, whereby vibration of the fork is prevented sub-
stantially as herein set forth and in part shown on the annexed drawings.