An Improved Tool for Cutting Glass Tubes.
Year: 1891

page_text: of Application, 20th Nov., 1391-Accepted, 24th Dec., 1891
COMPLETE SPECIFICATION.
An Improved Tool for Cutting Glass Tubes.
I ARTHUR WELLINGTON CHESTERTON of No. 49 India Street Boston, County
of Suffolk State of Massachusetts United States of America do hereby declare
the nature of this invention and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My invention relates especially to a tool for cutting glass tubes; and it consists
in certain novel features hereinafter fully set forth, the object being to produce a
simpler, cheaper and more effective device of this character than is now in
ordinary use.
The nature and operation of the improvement will be readily understood by all
conversant with such matters from the following explanation.
In the accompanying drawing
Figure 1 is a perspective view of my improved tool;
Figure 2 a view illustrating the method of using the same; and
Figure 3 a sectional elevation showing details of construction.
Like letters and figures of reference indicate corresponding parts in the different
figures of the drawings.
A. and B represent the arms of the tool which are connected at one end by a
spring, b, secured thereto in any suitable manner. A fulcrum block d is disposed
between the arms, A, B, near the spring. The arm A is spaced and numbered to
measure the length of the tube and a guage sleeve, †, provided with a set screw, J,
is fitted to slide thereon.
In the outer end of the arm, A. a rotary cutting disk, i, is mounted on a pivot, j,
and on the corresponding end of the arm, B, a segmental cutter block, k, is secured
in position to be engaged by said disk when the arms are closed.
A. link or clamping lever, C, encircles both the arms A B and is fitted to slide
thereon. Said link is extended downward to form a thumb piece, l, and extended
and curved at the opposite end to form a finger loop, m.
In the use of my improvement the guage sleeve, f, is secured on the arm A at
a determined distance from the cutter disk, i, by means of the set-screw, g.
The tube D to be cut is then disposed on said arm as shown in Figure 2.
The spring, b, forms a handle for holding the tool. The lever, C is then grasped
by the thumb and fore-finger and tilted forcing the armis A and B towards each
other against the pressure of the spring, b and holding the tube D, in contact with
the cutter block as shown in Figure 2.
By rotating the tube the disk, i, creases or cuts the same on the inner face when
said tube may be readily broken at the desired length in a manner which will be
readily understood by all conversant with such matters without a more explicit
description.
It will be seen that by changing the position of the links C on the arms, A, B,
the leverage may be readily changed and the pressure on the cutter disk adjusted
as desired.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
First. A tool for cutting glass tubes comprising two spring separated arms,
a rotary disk mounted in one of said arms, a cutter block on the companion
arm and a sliding link or clamping lever encircling said arms substantially as
described.
Second. A tool for cutting glass tubes, comprising two spring separated arms

page_text: one of said arms being spaced and provided with a sliding guage sleeve, a rotary
cutter disk in said arm, a segmental cutter block on the companion arm and a link
or clamping lever fitted to slide on said arms and extended to form a thumb and
finger hold substantially as described.
Third. In a tool for cutting glass tubes, the arms A, B, connected by the spring
the fulcrum block, d between said arms in combination with the cutter disk, i,
pivoted in the arm, A.; the cutter block, k, secured to the arm B and the sliding
link C encircling said arms substantially as described.
Fourth. In a tool for cutting glass tubes, two spring tensioned arms provided
respectively with a cutter, and a cutter block in combination with a sliding link
encircling said arm substantially as described.
Fifth. In a tool for cutting glass tubes the spring separated pivoted arms A B
provided respectively with the rotary cutter i, and cutter block ka gunge sleeve on
the cutter arm and the clamping link, C encircling said arms substantially as and
for the purpose set forth.
Dated this 20th day of November 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.