IMPROVED APPARATUS APPLICABLE TO BOBBIN NET or Twist LACE MACHINES and Warp LAGE MACHINES.
Year: 1873

page_text: LETTERS PATENT to Benjamin Walker, jun'., of the Firm of B.
Walker and Company, Old Lenton, Nottinghamshire, Lace Manu-
facturers, for the Invention of "IMPROVED APPARATUS APPLICABLE TO
BOBBIN NET or Twist LACE MACHINES and Warp LAGE MACHINES.
"
PROVISIONAL SPECIFICATION left by the said Benjamin Walker at the
Office of the Commissioners of Patents, with his Petition, on the
31st December 1873.
I, BENJAMIN WALKER, jun"., of the Firm of B. Walker and Com-
pany, Old Lenton, Nottinghamshire, Lace Manufacturers, do hereby
declare the nature of the said Invention for "IMPROVED APPARATUS APPLI-
CABLE TO BOBBIN NET OR TWIST LACE MACHINES AND WARP LACE MACHINES,"
to be as follows:-
One of my improvements is applicable to lace machines which are
supplied with threads from spools or bobbins, each such thread being
passed through the cye of a link which is attached to a weight; below
the weights is placed a grooved bar which slides in bearings secured

page_text: to the machine. A second bar slides in the groove of the first bar and
projects beyond either or both ends thereof. This second bar carries
trucks, between which the rim of a cam slides which communicates a
right and left sliding motion to the bar, which has teeth upon its upper
edge, which teeth correspond to teeth on the upper edge of the grooved
bar, which is prevented from moving (except at stated times) by the
rim of a second cam which slides between trucks carried by the bar.
Portion of the rim of the second cam is cut away so as to allow the
grooved bar to slide at certain times. Besides the trucks this bar carries
a stud which takes into a catch or notch of a sliding rod attached to a
lever carried by the fork bar which guides the driving strap on to the fast
or loose pulley.
"
Upon the breaking of any thread carrying a weight the said weight
will drop between the teeth of the grooved bar, thus causing it to be
moved by the second bar, a right or left movement of which will cause
the notched sliding rod attached to the lever of the forked bar to be
released, and will throw the lever into such a position as to be acted
upon by a third cam, which will immediately traverse the driving belt
on to the loose pulley and stop the machine..
Instead of the grooved and sliding toothed bars I may prefer per-
forated bars lying in an horizontal position; in such case a weight
dropping into either series of perforations will lock the bars together
and operate the belt fork, as before described.
A second improvement consists in making the thread selecting jacks
shorter than heretofore employed, and bending them over at one end, :
and forming such portion so that it will act as a spring; selecting jacks
so formed when placed in their sleys will ensure the points being passed
between the threads, except at such times as they are held clear by the
jacquard or locking bar.
on the 27th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, BENJAMIN
WALKER, junior, of the Firm of B. Walker and Company, Old Lenton,
Nottinghamshire, Lace Manufacturers, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of December, in the year
of our Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Benjamin Walker, Her special licence
that I, the said Benjamin Walker, my executors, administrators, and
assigns, or such others as I, the said Benjamin Walker, my executors,
administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term
therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVED APPARATUS
APPLICABLE TO BOBBIN NET OR TWIST LACE MACHINES AND WARP LACE
MACHINES," upon the condition (amongst others) that I, the said
Benjamin Walker, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should par-
ticularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
"
NOW KNOW YE, that I, the said Benjamin Walker, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying
Drawings forming a part of this Specification:-
One of my improvements is applicable to lace machines which are
supplied with threads from spools or bobbins, each such thread being
passed through the eye of a link which is attached to a weight; below
the weights is placed a grooved bar which slides in bearings secured to
the machine. A second bar slides in the groove of the first bar and
projects beyond either or both ends thereof. This second bar carries
trucks, between which the rim of a cam slides which communicates a
right and left sliding motion to the bar, which has teeth upon its upper
edge, which teeth correspond to teeth on the upper edge of the grooved
bar which is prevented from moving (except at stated times) by the rim
of a second cam which slides between trucks carried by the bar.
Portion of the rim of the second cam is cut away so as to allow the
groove bar to slide at certain times. Besides the trucks this bar carries

page_text: a stud which takes into a catch or notch of a sliding rod attached to the
lever carried by the fork bar which guides the driving strap on to the fast
or loose pulley.
Upon the breaking of any thread carrying a weight the said weight
will drop between the tooth of the grooved bar, thus causing it to be
moved by the second bar, a right or left movement of which will causo
the notched sliding rod attached to the lover of the fork bar to bo
released, and will throw the lever into such a position as to be acted
upon by a third cam, which will immediately traverse the driving belt
on to the loose pulley and stop the machine.
Instead of the grooved and sliding toothed bars I may prefer per-
forated bars lying in an horizontal position; in such case a weight
dropping into either series of perforations will lock the bars together and
operate the belt fork, as before described.
A second improvement consists in making the thread selecting jacks
shorter than heretofore employed, and bending them over at one end,
and forming such portion so that it will act as a spring; selecting jacks
so formed when placed in their sleys will ensure the points being passed
between the threads, except at such times as they are held clear by the

page_text: bars D, D, is a third bar D' which is caused to slide to and fro through
its being connected by a link to the upper end of a bell-crank lever H,
which carries a truck on the end of its lower arm, which is operated by
a grooved cam H', the throw of which will vary according to the guage
and traverse of the bar D. Above the bars D and D' are suspended a
number of weights or lingoes I by cords passed through a hole at the
rear end and round a square axle bar L through a hole. Near the front
end of each lingoc a loop of cord is passed, which also passes on cach
side of a rod K and through a link K² in front of a sley K. Through tho
links K the threads from the spools or lobbins are passed, and upon
the
breaking of a thread the weight of the lingoe I will cause it to drop into
the position shewn by the dotted lines in Figure 4, the front end of the
lingoc dropping between the teeth of the bars D and D¹, it being
prevented from swinging back so as to clear the bars by a rod L'
pressing upon the rear cords. The rod L' is suspended from the axle
bar L.
Secured to the framing of the machine is a bracket E, shewn in side
viow at Figure 3, this bracket besides carrying an axle for one of the
rocking bearings D and a fixed bearing D' also forms a slotted bearing
for a wedge-pointed catch F, shown in section at Figure 5 and part of it
in side view, and in plan at Figure 6, where the inner end of the catch
is seen lying in a notch cut in a piece screwed to the bars D. The wedge-
pointed end of the catch is held up by a spring F, shewn at Figure 3,
and the front end is slotted to receive a rod, which is carried by a
weighted lever F and a hand lever F³, the lower ends of which arc
secured on a rocking rod 13 attached to a link F* connected to the strap
fork bar. The catch Fassists the springs D³ to firmly hold the bars D, D,
in a fixed position, except at such times as one of the weights or lingoes I
fall between the teeth of the three bars, in which case the apparatus
acts as follows:-The bar D¹ having a to-and-fro traverse given it by the
cam H' carries the bars D, D, with it, thereby releasing the catch F,
which is drawn clear of the bars by the weighted lever F¹, thus throwing
the hand lever F on to the cam G, which directly traverses the hand
lever rod F³ and link F and throws the strap on to the loose pulley and
stops the machine.
The workman after replacing the broken thread through the link
above the weight or lingoe I pushes the hand lever back into the
position shewn at Figure 2, which movement drives the catch F through

page_text: and beneath the notch in the bar D', as seen in front view at Figure 3,
until another thread breaks, when the movements are repeated and the
machine again stops.
Instead of the weight or lingoe I, I may sometimes employ a dropper,
shown in side view at Figure 8, and instead of employing vertical E
bars D, D, and D' I sometimes use horizontal slotted or perforated bars,
in which case I employ a dropper, shewn at Figure 7.
Having now described the nature of the said Invention and in what
manner the same is to be performed I declare that I claim, the employ-
ment of apparatus for stopping a twist lace or warp lace machine by the 1
falling of a weight, lingoe, or dropper upon the breaking of a thread, as
herein-before described and illustrated in the above Specification and
Drawings annexed.
In witness whereof, I, the said Benjamin Walker, junior, have
hereunto set my hand and seal, this Twenty-sixth day of June, in 1
the yeard of our Lord One thousand cight hundred and seventy-
four.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
BENJAMIN WALKER.
(L.S.)