IMPROVEMENTS IN
Year: 1871

page_text: LETTERS PATENT to James Carver, of the Firm of Messieurs Carver
and Mosley, of "The Butcher Street Works," in the Town and
County of the Town of Nottingham, Bobbin and Carriage Manu-
facturers and Machine Builders, for the Invention of "IMPROVEMENTS
PROVISIONAL SPECIFICATION left by the said James Carver at the
Office of the Commissioners of Patents, with his Petition, on the
27th February 1871.
I, JAMES CARVER, of the Firm of Messieurs Carver and Mosley, of
"The Butcher Street Works," in the Town and County of the Town of
Nottingham, Bobbin and Carriage Manufacturers and Machine Builders,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN

page_text: MACHINERY EMPLoyed in the Manufacture of BOBBIN NET OR TWIST LACE,"
to be as follows :-
Hitherto in lace machines two bars called spindle bars have been
employed having fixed levers attached to them, one end of which carries
a bar called a hanger bar. To this hanger bar are attached point bar
arms carrying point bars with points in them for the taking up the
threads of lace. These spindle bars are exceedingly heavy, causing
much friction and obstructing the light, the whole being bound together
and working on different cams causes great vibration to the point bars,
which is detrimental to the making of good lace.
Now my Invention consists in working independent levers horizontally
on axles or their equivalent, one end works directly on the cam and the
other lifts the point bar arm or hanger bar. Each of these levers works
on its own cam, and will therefore lift the point bar moro steadily,
while the abandonment of the heavy spindle bars enables the machine to
work with greater speed and less friction, thus avoiding so much
obstruction to the light. I may in certain cases employ one spindle bar
only.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Carver in the Great Seal Patent Office on
the 26th August 1871.
"
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
CARVER, of the Firm of Messieurs Carver and Mosley, of "The Butcher
Street Works," in the Town and County of the Town of Nottingham,
Bobbin and Carriage Manufacturers and Machine Builders, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of February, in tho
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fourth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said James Carver, Her special
licence that I, the said James Carver, my executors, administrators,
and assigns, or such others as I, the said James Carver, 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

page_text: expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Islo of Man, an Invention for "IMPROVEMENTS IN MACHINERY
EMPLOYED IN THE MANUFACTURE OF BOBBIN NET OR TWIST LACE," upon the
condition (amongst others) that I, the said James Carver, my executors
or administrators, by an instrument in writing under my, or their, or
one of their hands and scals, 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
tho said Letters Patent.
.
NOW KNOW YE, that I, the said James Carver, do hereby declare
the nature of the 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 Drawings
hereunto annexed, and to the letters and figures marked thereon (that is
to say):-
Hitherto in lace machines two bars called spindle bars have been
employed having fixed levers attached to them, one end of which
carries a bar called a hanger bar. To this hanger bar are attached
point bar arms carrying point bars with points in them for the taking
up of the threads of lace. These spindle bars are exceedingly heavy,
causing much friction, and obstructing the light; the whole being
bound together and working on different cams causes great vibration
to the point bars, which is detrimental to the making of good lace.
-
⚫ Now my Invention consists in working independent levers horizontally
on axles or their equivalent; one end of the lever works directly on the
cam, and the other lifts the point bar arm or hanger bar. Each of these
levers works on its own cam, and will therefore lift the point bar more
steadily, while the abandonment of the heavy spindle bars enables the
machine to work with greater speed and with less friction, thus avoiding
so much obstruction to the light. I may in certain cases employ one
spindle bar only.
Having thus set forth the nature of my said Invention, I proceed
more particularly to describe the manner of performing the same, with
reference to the accompanying. Drawings, and to the letters and figures

page_text: Figure 1 Is a Sectional view of a DODDIN net or twist lace maenme
constructed according to my improvements; Figure 2 is a front view of
the said machine showing somewhat more than half the length of the
machine; Figures 3 to 6 show the cams in their relative position with {
regard to each other and the trucks they operate, by which the several
movements of the machine are effected.
In constructing a machine according to these improvements I employ
two main standards A, one at each end of the machine, a central back
standard B, and two or more intermediate brackets C. These standards 1
and brackets are connected with an upper tic bar D and a back tie bar E,
the end standards are connected near their lower ends by a front tic
bar F, to which are attached brackets G, horizontal bars G' connecting
the brackets G with the back tie bar E; H, H, are the comb bars, to
which the combs are secured in the usual way; I, I, are the landing 1
bars, which have the usual to-and-fro movements communicated to
them through connecting links, which are hinged to them and to the
ends of the levers K secured on a shaft K' which is rocked in its bearings
by a lever K³. At each end of the shaft each lever has one end of a
connecting rod attached to its lower end, the connecting rods being 2
operated by the cranks of the driving shaft K, which revolves in
bearings supported by the end standards and the brackets G. The
comb bars H, H, are secured at each end to and are carried by
checks. H³, H³. The landing bars I, I, arc secured to and carried by
checks I, I, the whole of which rock upon and are supported by an a
axle secured in each end standard, one of which standards is shewn
by dotted lines at the left end of Figure 2. The driving shaft K³ is
provided with the usual hand wheels K', and also with a fly wheel, and
with fast and loose driving pulleys at either end of the machine. The
driving shaft carries a bevil wheel, which gears into a similar wheel on a
the lower end of a shaft K', which revolves in two bearings carried
by one of the end standards. The upper end of the shaft K' carries a
second bevil wheel, which gears into a third wheel twice its size, which
is keyed on.the end of the cam shaft K6; this shaft through the gearing
described revolves once to every two revolutions of the driving shaft, a
thereby alternately operating (by the cams keyed on it) upon the front:
and back point bars L, L, and front and back catch bars M, M. The

page_text: several movements of these bars being effected by the following means :-
At the back of the back point bar are secured bent arms L' encircling
the work roller P; each arm is hinged at its upper end to the front end
of a lever L³, which carries at its back end a truck operated upon by a
cam 4 on the shaft K 6, which cam raises the bar to its highest position,
as seen at Figure 1. The front point bar L is operated in like manner
in its turn by a cam 3 working on a truck carried at the back end of a
lever L, the front end of which is hinged to the upper end of a straight
arm L³, which has its lower end secured to the front point bar, the in-
and-out movements of the point bars are effected by a straight link L'
hinged to the back bar, and an arched link L6 encircling the work
roller P hinged to the front bar, the other ends of the links being hinged
to the lower ends of levers L' and L³, each of which carries a truck at
the upper end, which are operated by the cams 5 and 6, shewn at
Figure 6. The in-and-out movements of the catch bars are effected by
the same means as the in-and-out movements of the landing bars, the
catch bars being hinged to and carried by brackets secured to the
landing bars; but the rise and fall of the catch bars are effected by
means of rods M', which are hinged at their lower end to the ends of
each catch bar, and at their upper end to the front ends of levers M², M³,
near each end of the machine, the back ends of which levers are operated
by cams 1 and 2 (see Figures 3 and 4). The truck levers L', L', rock
upon axles N, which pass through and are secured in the central back
standard B and the two or more intermediate brackets C. The
levers L, L, and M³, M³, rock upon axles O carried by bearings
attached to the intermediate brackets C, and also other bearings secured
to the top tie bar. I may in certain cases employ one spindle bar only,
such spindle bar I employ instead of the separate axles ☐ carrying the
rocking levers above described; such levers would be free to rock upon
the said spindle bar, but they would be confined to their positions on
the said bar by collars held by a set screw in each collar, the spindle bar
being held fast in its bearings. The remaining parts of the machine are
of the usual construction.
Of the usual construction.
Having now described the nature of the said Invention, and in what
manner the same may be performed, I declare that I claim,-

page_text: Second. The arrangement and combination of parts herein-before set
forth, worked and acting in the manner and for the purpose described.
In witness whereof, I, the said James Carver, have hereunto set my
hand and scal, this Twenty-fourth day of August, in the year of
our Lord One thousand eight hundred and seventy-onc.
Witness,
GEO. JON. ROBINSON,
Patent Office,
Nottingham.
JAMES CARVER. (L.S.)