Im- PROVEMENTS IN TWIST LACE MACHINES
Year: 1874

page_text: LETTERS PATENT to John Cresswell Johnson, of the Town and
County of the Town of Nottingham, for the Invention of "Im-
PROVEMENTS IN TWIST LACE MACHINES."
Sealed the 6th March 1874, and dated the 7th January 1874.
PROVISIONAL SPECIFICATION left by the said John Cresswell Johnson
at the Office of the Commissioners of Patents, with his Petition,
on the 7th January 1874.
I, JOHN CRESSWELL JOHNSON, of the Town and County of the Town
of Nottingham, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN TWIST LACE MACHINES," to be as follows:-
A machine according to my improvements consists of the following
parts:-There are two end standards which carry four or more horizontal
rails; these standards and rails support bearings for a cam shaft on their
upper side, the cams on which operate elbow levers rocking on shafts
above the rails; the levers carry trucks at their upper ends, and have
their lower ends attached to links, which are secured to point bars which

page_text: have up-and-down movements communicated to them. The horizontal
movements of the point bars are obtained by means of vertical rocking
levers, each of which have a link hinged at the upper end, which link
carries a truck operated by a cam on the cam shaft; the lower end of
the rocking lever is attached by a link to the point bar. The comb bars
are supported by joints carried by the end standards and one or more
intermediate cradles in the usual way.
The cam shaft is provided with pulleys for driving or stopping the
machine. On each end of the cam shaft is secured a crank connected
to a link, having its lower end attached to an axle pin in a quadrant
which carries other axle pins, on which the lower ends of connecting
links are placed, the upper ends of the links are connected to the inner
ends of levers fast on the shafts on which the elbow levers rock, the
outer ends of the levers are attached to links which receive at their
lower ends the axles of the levers which carry the catch bars.
In the centre of the machine I place an horizontal shaft at right
angles to the cam shaft; such horizontal shaft is provided with a fly
wheel and a toothed wheel gearing into a toothed wheel on the cam
shaft, so as to enable the workman to place the machine in any position
required. The rails first named may be supported intermediately of the
standards.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Cresswell Johnson in the Great Seal Patent
Office on the 7th July 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
CRESSWELL JOHNSON, of the Town and County of the Town of Notting-
ham, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of January, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John Cresswell Johnson, Her
special licence that I, the said John Cresswell Johnson, my executors,
administrators, and assigns, or such others as I, the said John Cresswell

page_text: Johnson, 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
"IMPROVEMENTS IN TWIST LACE MACHINES," upon the condition (amongst
others) that I, the said John Cresswell Johnson, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly 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 John Cresswell Johnson, 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:-
-
A machine according to my improvements consists of the following
parts: There are two end standards which carry four or more horizontal
rails; these standards and rails support bearings for a cam shaft on their
upper side, the cams on which operate elbow levers rocking on shafts
above the rails; the levers carry trucks at their upper ends, and have
their lower ends attached to links which are secured to point bars which
have up-and-down movements communicated to them. The horizontal
movements of the point bars are obtained by means of vertical rocking
levers, each of which have a link hinged at the upper end, which link
carries a truck operated by a cam on the cam shaft; the lower end of the
rocking lever is attached by a link to the point bar. The comb bars are
supported by joints carried by the end standards and one or more inter-
mediate cradles in the usual way.
The cam shaft is provided with pulleys for driving or stopping the
machine. On each end of the cam shaft is secured a crank connected to
a link, having its lower end attached to an axle pin in a quadrant which
carries other axle pins, on which the lower ends of connecting links are
placed, the upper ends of the links are connected to the inner ends of
levers fast on the shafts on which the elbow levers rock, the outer ends.

page_text: of the levers are attached to links which receive at their lower ends the
axles of the levers which carry the catch bars.
-
In the centre of the machine I place an horizontal shaft at right
angles to the cam shaft; such horizontal shaft is provided with a fly
wheel and a toothed wheel gearing into a toothed wheel on the cam 5
shaft, so as to enable the workman to place the machine in any position
required. The rails first named may be supported intermediately by
standards.
Figure 1 is an end view of a twist lace machine constructed according
to my improvements.
Figure 2 is a sectional view, Figure 3 a front view of portion of the
machine shewing the left end.
And Figures 4, 5, and 6 are separate parts of the machine hereafter
referred to.
In these Figures A are the end standards, B the horizontal rails;
these standards and rails support bearings for a cam shaft C, the cams
on which operate elbow levers C¹ rocking on shafts D, D, in bearings
supported by the upper rails B, B; the levers may be prevented from
moving endways by a collar on each side (not shewn) or by equivalent
means. The levers carry trucks at their upper ends, and have their
lower ends attached to links C2, which are secured to point bars 0³, to
which the point leads Care secured in the usual way; the bars have
up-and-down movements communicated to them by the cams, horizontal
movements being also obtained by means of cams operating vertical
rocking levers E, each of which has its upper end hinged to one end of
a link E, which has its opposite end hinged to and is carried by a lever
E², which rocks upon one of the shafts D, the lower end of the levers E
being attached by a link E³ to the point bar; the levers E² are prevented
from moving endways in the same way as the levers C¹. The comb bars
are supported by joints F carried by the end standards and by one or
more intermediate cradles F¹, and are operated in the usual way.
•
The cam shaft is provided with pulleys G for driving or stopping the
machine, and on each end of this shaft is keyed a crank G' connected to
a link G, the lower end of which is attached by an axle pin to a a
quadrant or disc G³, which also carries other axle pins on which the
lower ends of connecting links H, H, are placed, the upper ends of these

page_text: links are connected to the inner ends of levers H', which are keyed fast
on the ends of the shafts D, D, thus producing a rocking motion of the
shafts, upon which are keyed other levers H2, the outer ends of which
are attached to links, which receive at their lower ends the axles of the
elbow levers which carry the catch bars.
At or near the centre of the machine I place a horizontal shaft I at
right angles to the cam shaft, and provide such shaft with a fly wheel L
and a toothed wheel J which gears into a toothed wheel K on the cam
shaft so as to enable the workman to place the machine in any position
required. The rails B may be supported intermediately of the standards
by a back stay B¹ or in any other way.
A side view of one of the intermediate bearings for the cam shaft is
shown at Figure 4. The gathering roller M and work roller N are
supported at each end by a pendant bracket shewn in side view at
Figure 5; both the rollers are operated in the usual way, the pendant
brackets also carry the ends of the net bar, which is supported inter-
mediately where required.
An end view of the bracket which carries the axle of the comb bar
joints is seen at Figure 6, and upon this axle the elbow levers which
carry the catch bars rock, and upon the projecting outer end of the axles
the quadrants or discs rock.
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 improved twist lace machine constructed as herein-before described
and illustrated in the above Specification and Drawings annexed.
In witness whereof, I, the said John Cresswell Johnson, have
hereunto set my hand and seal, this Fourth day of July, in the
year of our Lord One thousand eight hundred and seventy-
four.
Witness,
H. W. GOUGH, C.E.
Nottingham.
JOHN CRESSWELL JOHNSON. (L.S.)