IMPROVE- MENTS IN LACE MACHINERY
Year: 1876

page_text: LETTERS PATENT to Joseph Cooper, of the Firm of Cooper & Co., Lace
Machine Builders, Lenton, near Nottingham, for the Invention of "IMPROVE-
MENTS IN LACE MACHINERY."
Scaled the 26th January 1877, and dated the 15th August 1876.
PROVISIONAL SPECIFICATION left by the said Joseph Cooper at the Office of
the Commissioners of Patents on the 15th August 1876.
JOSEPH COOPER, of the Firm of Cooper & Co., Lace Machine Builders, Lenton,
near Nottingham. "IMPROVEMENTS IN LACE MACHINERY."
Heretofore in bobbin net and.twist lace machines the point bars have ordinarily
been carried by arms from levers turning upon spindle bars, and have been raised
and lowered by the turning of these bars. The turning of these bars has been con-
trolled by cams on a cam shaft acting upon trucks upon arms standing out from
the bars.
According to my Invention I joint the arms which carry the point bars to slides
capable of rising and falling in fixed guides. The slides ench carry a truck to rest
upon a cam on the cam shaft, and the lifting and lowering of the point bars is thus
controlled. By this means a cheaper construction is obtained at the same time that
it is stronger, steadier and more compact, and the machine is more open than
heretofore.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Cooper in the Great Seal Patent Office on the 14th February
1877.
JOSEPH COOPER, of the Firm of Cooper & Co., Lace Machine Builders, Lenton,
near Nottingham. IMPROVEMENTS IN LACE MACHINERY."
Heretofore in bobbin net and twist lace machinery the point bars have ordinarily
been carried by arms from levers turning upon spindle bars, and have been raised
and lowered by the turning of these bars. The turning of these bars has been
controlled by cams on a cam shaft acting upon trucks upon arms standing out from
the bars.

page_text: According to my Invention I joint the arms which carry the point bars to slides
capable of rising and falling in fixed guides. The slides each carry a truck to rest
upon a cam on the cam shaft, and the lifting and lowering of the point bars is thus
controlled. By this means a cheaper construction is obtained at the same time
that it is stronger, steadier, and more compact, and the machine is more open than
heretofore.
Figure 1 shows a vertical transverse section, and Figure 2 a back view of parts
of a lace machine constructed in the manner above described. In these Figures
A, B, are the front and back point bars carried by arms A¹, B', which at their upper
ends are jointed to slides A², B², capable of being moved upwards and downwards
in guides carried by the fixed top rail C which forms part of the frame of the
machine, each of the slides A3, B2, carries a truck A, B, which bears upon the top
of one or other of the cams D on the cam shaft E, and as the shaft revolves the
slides and consequently the point bars are raised and lowered by the cams at the
times required. Four or other number of arms and slides may be used for carrying
each point bar, according to the length of the machine. On the cam shaft are other
cams F which give a rocking motion to levers G. The lower ends of these levers
are coupled by links H to the point bars and givo to them their backward and
forward motion. The main driving shaft is mounted along the front of the machine
below the parts which are shown in the Drawing, and gives motion through an
inclined shaft to a bevel wheel at one end of the cam shaft E, and from the inclined
shaft a slow revolving motion is also transmitted to the work roller I; J is the
work bar; K, K, are rods upon which are lever arms for working the catch bars in
the ordinary manner; a rocking motion is given to these rods from cams upon the
cain shaft as is usual. Any suitable ordinary arrangements may be adopted for
giving motion to the warp bars, bobbins, and other parts of the machine, so that I
have not thought it necessary to show them in the Drawing.
Having thus described the nature of my Invention, and the manner of performing
the same, I would have it understood that I clain, the construction of lace
machinery with the point bars carried by arms from slides which rest upon
revolving cams, substantially as herein described.
In witness whereof, I, the said Joseph Cooper, have hereunto set my hand
and seal, this 12th day of February, in the year of our Lord One thousand
eight hundred and seventy-seven.