the mode of Making the same.
Year: 1887

page_text: Date of Application, 15th Aug., 1887.
Specification Accepted, 16th Sept., 1887.
the mode of Making the same.
We, HAMILTON LE GRAND MOULTON, and WILLIAM HENRY CLARKSON, both of
417, Race Street, in the City of Philadelphia, State of Pennsylvania, United States of
America, Builders of Textile Machinery, 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 :-
One object of our Invention is to so construct a toothed cylinder, such as is used on
what is termed a "Garnett" machine, that the same will be more effective in its action
than usual, a further object being to facilitate and cheapen the grooving or threading
of said cylinder and the securing thereto of the toothed wire strips with which it is
clothed.
These objects we attain in the manner hereinafter set forth, reference being had to.
the accompanying drawings, in which :
Fig. 1, represents an elevation of part of a "Garnett" machine cylinder constructed
in accordance with our invention, the toothed strips being unwound from a part of the
cylinder.
Figs. 2, and 3, are diagrams illustrating our improved method of grooving or
threading the cylinder for the reception of the toothed strips.
Fig. 4, represents a sectional view illustrating our improved method of and tool for
calking the cylinder, so as to secure the toothed strips thereto; and
Fig. 5, is a side view of the said tool, showing part of the cylinder in section.
An ordinary "Garnett" cylinder has, extending from end to end of the same, a
continuous screw thread or groove for the reception of the toothed wire strip with
which the cylinder is provided; consequently, the finer the gauge of the thread, the
finer will be its pitch and the less will be the angle of the toothed wire on the actuating.
surface of the cylinder.
In carrying out our invention, we discard the usual single thread, and form in the
cylinder a multiple thread or series of grooves, a toothed strip being applied to each of
the grooves, so that without any sacrifice of fineness in the gauge of the cylinder, we
can increase the pitch of the grooves to any desired extent,
:

page_text: The cylinder shown in Fig. 1, has a double thread, and is wound with two strips, x, x,
but it will be evident that the number of threads in the cylinder, and the number of
strips, may be increased to any extent which circumstances may suggest.
If each of the threads in the cylinder was cut separately, however, the operation
would be unwarrantably tedious and expensive, hence we have devised a method of
cutting all of the threads simultaneously by one tool.
This tool may be similar to an ordinary multiple bit tool intended for cutting a
single thread of the same gauge as that of the cylinder to be produced in accordance
with our invention, such a tool being shown at, y, in Fig. 2, but instead of traversing
this tool at the rate of speed at which it would be traversed if it was intended to cut
a single thread, we increase the speed of traverse of the tool to an extent dependent
upon the number of independent threads to be cut thereby; for instance, supposing
the tool to be of a gauge of twenty threads to the inch, and supposing that we wish to
cut two threads upon the cylinder instead of one, we would traverse the tool at double
the rate of its ordinary movement, so as to form in the cylinder, two threads each
having a pitch of ten to the inch, the first bit of the tool cutting the first thread and
the second bit cutting the second thread, while the third bit follows in the thread cut
by the first; and the fourth bit in the thread cut by the second. (See Fig. 3.)
By this means we are enabled to cut both or all of the threads in the cylinder at one
operation and in a much less time than would be required to cut a single thread of the
same gauge.
The bits of the tools should have their heels so shaped as to insure the proper
clearance when the tool is cutting threads of coarse pitch.
The cylinder being grooved or threaded, and the toothed strips wound in the grooves,
it becomes necessary to calk or press down the inetal between the grooves, so that the
strips will be confined to the cylinder, the bases of the strips being preferably dove-
tailed or flared, so that the metal of the cylinder can be calked over the same.
For this purpose we have devised a multiple disk calking tool, which is carried by
the tool post of the lathe, and is fed at a speed commensurate with the pitch of the
thread, the tool having as many disks as there are independent threads to be calked at
one operation.
In Figs. 4 and 5 we have illustrated the calking of a cylinder having a double
thread and two strips wound in the grooves between the threads.
A, is the carrying bar of the calking tool having a stem for adaptation to the tool
post of the lathe and forked at the inner end to form bearings for a spindle, B, which
carries a pair of calking disks, a, said spindle having a collar, 6, forming a bearing for the
inner disk, and a threaded portion, d, to which is adapted a nut, D, bearing upon the
outer disk, a washer, f, being interposed between the two disks, which washer, as well
as each disk, is of a thickness determined by the gauge of the thread on the cylinder.
The spindle, B, has its bearings in split sleeves, g, carried by the forked bar, A, and
acted upon by set screws, h, so that they can be adjusted to take up wear.
It will be seen that by the use of the above described tool both threads of the
cylinder will be simultaneously calked over the basis of the adjoining toothed strips,
the operation of calking being effected in one half the time that would be required if
but a single disk tool was employed, and where the cylinder has more than two threads
and the tool more than two disks, the time gained in calking the cylinder will be
increased in proportion.
In the usual calking tool, the disk turns on a fixed spindle, but such tool is objection-
able because the rapid wear upon the disk and spindle soon causes the disk to run
irregularly, an objection which we overcome by mounting the disks rigidly upon the
shaft or spindle and permitting the latter to turn in bearings, which can be readily
adjusted to compensate for wear.
:
:-
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed, we declare that what we claim is :-
1. The herein before described toothed cylinder for textile machinery, said cylinder
having a multiple thread, and a toothed strip for each thread.

page_text: 2. The mode herein before described of cutting a multiple thread on a cylinder by
means of a single multiple bit tool, said mode consisting in feeding the tool at a rate
of speed which is as much greater than the gauge of the tool as the number of threads
to be produced is greater than a single thread.
3. As an improvement in the manufacture of toothed cylinders for textile machinery,
the mode hereinbefore described, which consists in first forming, a multiple thread on
said cylinder, then winding independent toothed strips in the spiral grooves thus
produced, and then applying pressure simultaneously to all of the threads of the set,
so as to calk them against the bases of the toothed strips.
4. The hereinbefore described tool for calking toothed cylinders of textile machinery,
said tool consisting of a bar, a spindle carried thereby, and two or more calking disks
on said spindle.
5. The combination, in a calking tool, of a spindle, a series of disks carried thereby,
and an interposed washer or washers for separating said disks.
6. The combination, in a calking tool, of a spindle, one or more calking disks
rigidly secured thereto, and a bar having bearings in which said spindle is free to turn.
D L
151 1
1007
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicants.