IMPROVEMENTS IN BOBBIN-NET -
Year: 1881

page_text: LETTERS PATENT to James Robinson Hancock, of the Firm of Smith and
Hancock, of Crocus Street, in the Town and County of the Town of
Nottingham, Machinists, for an Invention of "IMPROVEMENTS IN BOBBIN-NET
-
PROVISIONAL SPECIFICATION left by the said James Robinson Hancock
at the Office of the Commissioners of Patents on the 25th July 1881.
JAMES ROBINSON HANCOCK, of the Firm of Smith and Hancock, of Crocus
Street, in the Town and County of the Town of Nottingham, Machinists.
IMPROVEMENTS IN BOBBIN-NET OR TWIST-LACE MACHINES, AND APPARATUS
APPLICABLE THERETO."
"
My improvements relate to the construction of a combined go-through lace
machine and jacquard. These improvements are equally applicable to Lever's
machines and curtain machines. The go-through machine consists of the following
parts: An inverted T shaped top tie bar, two end standards and one intermediate
standard, six intermediate bearing brackets, each forming three bearings, one
bearing for a cam shaft at the front of the machine, a second bearing for a
point bar arm axle, a third bearing for the point bar knocking out lever axle. The
point bar arm lever is double sided, between which revolves the point bar truck
and slide, which is a block adjustable in the upper end of the point bar arm,
secured in the arm and bracket by an axle pin. The point bar arms, both at the
front and back, are slotted the whole length from the foot to the block bearing end;
the upper end of the slot allows the point bar pressing up cam to pass within it ;
the lower end of the slot is provided with an axle pin which secures the lower
front end of the knocking out bowed link within it, or the straight link for the
back point bar; the links which govern the in and out movements of the front and
back catch bar feet are hinged upon axle pins secured in the end standards; each
link at its outer end carries an axle pin which connects it to a short lever secured
on a shaft which rocks in bearings carried by and secured on a second rocking
shaft lying in bearings in the intermediate and end standards.

page_text: The second rocking shaft carries a lever at each end between the standards, each
connected at its outer end to the upper end of a rod carried at its lower end by an
axle pin secured in a disk or three ended lever, each provided with a boss
projecting through beyond the standards, and forming an axle for the lower end of
a driving rod hinged to a crank pin carried by a toothed wheel revolving on an
axle secured in the end standard, both toothed wheels being driven simultaneously
by a spur wheel on each end of a driving shaft revolving in bearings in the three
standards. Intermediately of the governing links before named are levers rocking
upon the axles, and having their inner ends secured to the catch bars; the levers
project inwards and carry trucks which run on a circle carried by the axle pin
plate, which is also of such a form as to form friction surfaces for the set screws in or
the ends of the point bars. The ends of the catch bars carry screws and lock nuts
capable of adjustment on the truck levers. Instead of carrying the comb bar links
on the same axles as the catch bar links, I carry them on axles secured in the
three standards below the circle; the comb bars are capable of adjustment upon the
joints in the usual way, but the joint axles are capable of adjustment inwards or
outwards in slots to suit the angle of the comb bars. The comb bars and combs
are of a peculiar construction, the outer and undersides of each comb bar forms a
right angle, and the upper surfaces are rolled and planed out to suit the shape of
the comb leads and to the circle of the carriages, the friction bearings being faced
with brass. Each comb lead is constructed as follows:-The workman screws the
mould handle after passing the screwed end through one side of the mould into
a threaded nut of iron or brass, tinned, of such a shape that when the combs have
been placed in position and the mould is closed and then filled with metal, the nut
is surrounded by the metal, and thus forms a ready means of securing each comb
lead firmly to the comb bar by the usual screw passing through it into the nut.
The jacquard is driven either by a continuation of the driving shaft of the
machine or by a separate shaft connected to it by toothed gearing, the jacquard
differs from the usual construction in the following parts:-The side standards are
planed on the top to receive the, slide bolts, which are boxed at one end, and are
fitted upon square ended bearings forming part of the standards and carrying the
driving shaft, the inner edges of the top and bevelled lower edges of the standards
are also planed to receive the boxes to which the slide bolts and driving bars are
secured; below the top of the standards are adjustable slide pieces. The rise and
fall of the cylinders are effected by connecting links hinged to the lower side of
-the-cylinder-slide-rods,-the-remaining-portion_of_the_apparatus being of the usual
construction. By machinery and apparatus constructed as above described, I
produce a combined machine and jacquard of more open construction than any
machine heretofore built, and the frictional parts being considerably less, the
machine can be driven at a much greater speed than has heretofore been attained.

page_text: SPECIFICATION in. pursuance of the conditions of the Letters Patent filed
by the said James Robinson Hancock in the Great Seal Patent Office on the
25th January 1882.
JAMES ROBINSON HANCOCK, of the Firm of Smith and Hancock, of Crocus
Street, in the Town and County of the Town of Nottingham, Machinists.
IMPROVEMENTS IN BOBBIN-NET OR TWIST-LACE MACHINES, AND APPARATUS
APPLICABLE THERETO."
My improvements relato to the construction of a combined go-through lace
machine and jacquard. These improvements are equally applicable to Lever's
machines and curtain machines. The go-through machine consists of the
following parts: An inverted T-shaped top tie bar, two end standards and
one intermediate standard, six intermediate bearing brackets, each forming.
three bearings, one bearing for a cam shaft at the front of the machine, a
second bearing for a point bar arm lever axle, a third bearing for the point bar
knocking out lever axle. The point bar arın lever is double sided, between
which revolves the point bar truck and slide, which is a block adjustable in the
upper end of the point bar arm secured in the arm and bracket by an axle pin.
The point bar arms, both at the front and back, are slotted the whole length from
the foot to the block bearing end; the upper end of the slot allows the point bar
pressing up cam to pass within it; the lower end of the slot is provided with an
axle pin, which secures the lower front end of the knocking out bowed link within
it or the straight link for the back point bar; the links which govern the in and
out movements of the front and back catch bar feet are hinged upon axle pins
secured in the end standards; each link at its outer end carries an axle pin, which
connects it to a short lever secured on a shaft which rocks in bearings carried by
and secured on a second rocking shaft lying in bearings in the intermediate and
end standards. The second rocking shaft carries a lever at each end between the
standards, each connected at its outer end to the upper end of a rod carried at its
lower end by an axle pin secured in a disc or three ended lever, each provided
with a boss projecting through beyond the standards and forming an axle for the
lower end of a driving rod hinged to a crank pin carried by a toothed wheel
revolving on an axle secured in the end standard, both toothed wheels being driven
simultaneously by a spur wheel on each end of a driving shaft revolving in bearings
in the three standards.
Intermediately of the governing links before named are levers rocking upon the
axles and having their inner ends secured to the catch bars; the levers project
inwards and carry trucks which run on a circle carried by the axle pin plate,
which is also of such a form as to form friction surfaces for the set screws in or the
ends of the point bars.
The ends of the catch bars carry screws and lock nuts capable of adjustment on
the truck levers. Instead of carrying the comb bar links on the same axles as the
catch bar links, I carry them on axles secured in the three standards below the
circle; the comb bars are capable of adjustment upon the joints in the usual way,
but the joint axles are capable of adjustment inwards or outwards in slots to suit
the angle of the comb bars. The comb bars and combs are of peculiar construction;
the outer and undersides of each comb bar forms a right angle, and the upper
surfaces are rolled and planed out to suit the shape of the comb leads and to the
circle of the carriages, the friction bearings being faced with brass. Each comb
lead is constructed as follows:-The workman screws the mould handle, after
passing the screwed end through one side of the mould into a threaded nut of iron
or brass, tinned, of such a shape that when the combs have been placed in position
and the mould is closed and then filled with metal, the nut is surrounded by the
metal, and thus forms a ready means of securing each comb lead firmly to the

page_text: driven either by a continuation of the driving shaft of the machine or by a
separate shaft connected to it by toothed gearing; the jacquard differs from the
usual construction in the following parts:-The side standards are planed on the
top to receive the slide bolts, which are boxed at one end and are fitted upon
square ended bearings forming part of the standards and carrying the driving shaft;
the inner edges of the top and bevelled lower edges of the standards are also
planed to receive the boxes, to which the slide bolts and driving bars are secured;
below the top of the standards are adjustable slide pieces; the rise and fall of the
cylinders are effected by connecting links hinged to the lower side of the cylinder
slide rods, the remaining portion of the apparatus being of the usual construction.
By machinery and apparatus constructed as above described I produce a combined.
machine and jacquard of more open construction than any machine heretofore built,
and the frictional parts being considerably less, the machine can be driven at a
much greater speed than has been heretofore attained.
DESCRIPTION OF THE DRAWINGS.
Figures 1, 2, and 3 represent a front view of my improved bobbin-net or twist
lace machine.
Figure 4, a vertical view of the standard at the left end of the machine,
shewing the angular shaft carrying toothed wheels gearing into the wheels, one on
the driving shaft and another on the cam shaft.
In the Drawings the teeth are not shewn, being of the usual construction.
Figure 5, a vertical view of the central standard, shewing a side view of one of
two hand wheels secured on the driving shaft.
Figure 6, an enlarged sectional vertical view of the operating parts lying
between the standards.
Figure 7 is a front view of the operating parts at the right end of the machine,
which rock the shafts actuating the catch bars, there being like parts at the left
end of the machine, but at the right end, in addition thereto, there is an apparatus
which ensures a constant unvarying take up of the work beam.
Figure 8 is a vertical view of the rocking plate outside the right end
standard and the circle within the machine which operate the catch bar lever
trucks.
Figure 9 represents side views of the pressing up cam and the knocking out cam,
hereafter referred to..
Figure 10 is a side view of my improved jacquard apparatus.
Figure 11 is a plan of the same, and
Figures 12, 13, 14, 15, 16, and 17, separate portions of the same, severally
referred to hereafter.
Figure 18 is an enlarged sectional view of my improved comb bar and comb.
Figure 19 a front view of portion of one such bar, shewing the shape of the
securing nut.
The corresponding parts in each Figure are indicated by the same letters where
necessary.
My improvements relate to the construction of a combined go-through lace
machine and jacquard; these improvements are easily applicable to Lever's
machines and curtain machines. The go-through machine consists of the following
parts An inverted T-shaped top tie bar A, two end standards B, one intermediate
standard C, and six intermediate bearing brackets D, each forming three bearings;
one bearing for a cam shaft E at the front of the machine, a second bearing for a
point bar armi lever axle F, a third bearing for the point bar knocking out lever
axle G.
Each point bar arm levers G³ is double sided, between which the point bar truck
revolves; there is a block G2 capable of adjustment in the upper end of each point
bar arm;
this block is secured by a knuckle joint and axle pin to the levers G¹.

page_text: The front and back point bar arms G³ and G are slotted their whole length
from the foot to the block bearing end, the upper end of the slot allows the point
bar pressing up cam G³ to pass within it. The lower end of the slot is provided
with an axle pin which secures the lower front end of the knocking out bowed
link Go within it for operating the front point bar, or the straight link G7 for
the back point bar. The links H and H' which govern the in and out movements
of the front catch bar foot H2 and the back catch bar foot H³ are binged upon
axle pins secured in the end standards, each link H and H¹ at its outer end carries
an axle pin which connects it to a short lever H³ secured on a shaft H³ nearly
the length of the machine between the end standards, the shaft H³ rocking in
bearings carried by and secured on a second rocking shaft I lying in bearings in
the intermediate and end standards. The shaft I carries a lever at each end,
each connected to the outer end of a connecting rod K carried by an axle pin
secured in a rocking plate K' upon the axle pins before named secured in the end
standards, each rocking plate is provided with an axle pin for the lower end of a
driving rod K', the upper end of which is carried by a crank pin K³, the crank
pin at the left end being secured in the toothed wheel on the end of the cam shaft,
and the crank pin at the right end in a cam plate L hereafter referred to.
Intermediately of the driving rods K2 are levers K, which at their outer ends
are carried by the axles in the links Hand H', and their inner ends carry axles for
trucks which run on a cam plate M at each end, which also forms friction surfaces
for the set screws in or for the ends of the point bars. The ends of the catch bars
carry set screws and lock nuts capable of adjustment on the truck levers K⭑
Instead of carrying the comb bar links N on the same axles as the catch bar
links, I carry them on axles secured in the three standards below the circle. The
comb bars N are capable of adjustment inwards or outwards by means of the links
N' in the slots N³ in the standards shewn at Figures 4 and 5. The comb bars N
and combs P are of peculiar construction, the outer and undersides of each bar
forms a right angle, and the upper surfaces are rolled and planed out to suit the
shape of the comb leads P, and also to the circle of the carriages, the frictional
bearing surfaces for the carriages may either form portion of the bar, or such
surfaces may be faced with brass as shewn at P³ in Figure 18. Thus, out of one
bar I form a comb bar, also a landing for the carriages Q.
Each comb lead is constructed as follows:-The workman screws the mould-
handle after passing the screwed end through one side of the mould into a screw
threaded nut of iron or brass, tinned, of such a shape that when the comb plates P¹
have been placed in position and the mould is closed and then filled with metal,
the nut is surrounded by the metal, and thus forms a ready means of securing each
comb lead firmly to the comb bar by the usual screw passing through it and into
the nut.
The additional apparatus at the right end of the machine, shewn at Figure 7,
for ensuring a constant unvarying take up of the work beam consists of two net
rollers R and R'; the lower one is provided with short pins on its circumference, its
whole length, and revolves at each end in bearings secured to the cam plate M
before named; the upper portion of these bearings are slotted to allow the upper
net roller R¹ to rise as it increases in diameter as the work is made, the roller R
being provided with a toothed wheel R² driven on a worm wheel on an axle
revolving in two bearings secured to the standard. The axle carrying a ratchet
wheel operated by a clawker R³ actuated by the cam plate L carrying the axle K³
before nained.
My improved jacquard apparatus, shewn at Figures 10 to 17 inclusive, may be
driven by a separate shaft connected to it by toothed gearing or by a continuation
of the driving shaft S, as shewn in the Drawings, the right end of such continued
shaft carrying a bevel wheel gearing into a similar bevel wheel, on a short shaft
revolving in a bearing bracket S₁ secured to the front of the jacquard; the last
named bevel wheel carries a toothed spur wheel which gears into a larger inter-
mediate toothed wheel S², gearing into a similar wheel on the cam shaft S³ of the

page_text: jacquard, which differs from those of the usual construction in the following
parts-The side standards are planed on the top to receive the slide bolts S, an
enlarged side view of one of which is shewn at Figure 12; these bolts are boxed at
one end and are accurately fitted upon square ended bearings S³ forming part of
the standards, and carrying the driving shaft S3, upon which the cams operating
the driving bars of the jacquard are secured. The inner edges of the top and the
bevelled lower edges of the standards are also planed true to receive the boxes
to which the slide bolts and driving bars are secured; below the top of the
standards are adjustable slide pieces S6 carried by brackets S7 which have
projections on the outer sides which slide upon the planed top of the
standards; the brackets are secured to the driving bars and carry them and the
slide bolts; this arrangement of parts is shewn in side view at Figure 10, in plan
at Figure 11, and a back end view enlarged at Figure 13. The rise and fall of the
cylinders are effected by connecting links hinged to the lower side of the cylinder
slide rods.
Figure 14 shews a side view of the toothed gearing to effect the reverse
revolution of the back cylinder.
Figure 15 shews one set of spring droppers in side view; and
Figure 16 a plan of portion of a sley.
The remaining portion of the apparatus being of the usual construction.
By machinery and apparatus constructed as above described I produce a
combined machine and jacquard of more open construction than any machine
heretofore built; and the frictional parts being considerably less the machine can be
driven at a much greater speed than has been heretofore attained.
Having thus described the nature of my said Invention and the manner of per-
forming the same, I declare that I claim,-
First. For the construction and employment of the slotted front and back point
bar arms G³ and G*, the arm Gs allowing the bowed knocking out link G6 to work
within it.
The arm G allowing the straight knocking out link G' to work within it, and
the upper part of the slots in both arms allowing the pressing up cam to work
within them.
Second. I claim the construction and employment with each catch bar of two
links H secured on the outer ends of a shaft H³, the upper ends of the links being
hinged to links H or H', the shaft H³ carrying four other intermediate links H
each capable of adjustment_on_the_shaft HS,_the_upper_ends_of_the_links. being
hinged to the catch bar feet. The shaft H³ rocking in bearings secured on a
rocking shaft I operated by the links K for actuating the catch bars, substantially
as described and illustrated in the Drawings annexed.
Third. The construction and employment of the peculiar shaped comb bars N,
supporting the comb leads, and also forming a landing for the carriages.
Fourth. The construction and employment of a screw threaded nut within the
metal of each comb lead, substantially as hereinbefore described for the purposes
set forth.
In witness whereof, I, the said James Robinson Hancock, have hereunto
set my hand and seal, this Twenty first day of January, in the year
of our Lord One thousand eight hundred and eighty two.
Witness,
H. W. GOUGH, C.E.,
Nottingham.
JAMES ROBINSON HANCOCK. (L.S.)