Improvements in Machines for Cutting Pipes and other Articles.
Year: 1899

page_text: Date of Application, 15th Aug., 1899-Accepted, 30th Sept., 1899
COMPLETE SPECIFICATION.
Improvements in Machines for Cutting Pipes and other Articles.
We, JAMES JOSEPH RIGNEY, (Agent), of 4, S. Rock Street, CURTIS QUINTILLION
MCWILLIAMS, (Manufacturer), of 255, Sunbay Street, and WILLIAM CALDER
MCCONNELL, (Manufacturer), of 309, Sunbay Street, Shamokin, in the County of
Northumberland and State of Pennsylvania, 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:-
The object of the invention is to provide a new and improved cutting machine
which is more especially designed for cutting pipes and other articles, arranged
for use on different sized pipes and constructed to insure a firm engagement of
the jaws on the pipe and avoid undue strain on the cutting tool.
The invention consists of novel features and parts and combinations of the
same, as will be fully described hereinafter and then pointed out in the claims.
A practical embodiment of our invention is represented in the accompanying
drawings forming a part of this specification, in which similar characters of
reference indicate corresponding parts in all the views.
Figure 1 is a front elevation of the improvement with parts broken out;
Figure 2 is a side elevation of the same;
Figure 3 is a sectional front elevation of the same, on the line 3-3 in Figure 2;
Figure 4 is a sectional plan view of the same, on the line 44 in Figure 1;
Figure 5 is a detail plan view of the tool post; and
Figure 6 is a detail side view of the same with part broken away.
The improved cutting machine is provided with a hollow frame or casing A,
preferably made in two sections A', A² removably connected with each other by
eye-bolts A, arranged on the sides of the casing, as is plainly illustrated in
the drawings. On the face of the casing A are arranged annular bearings A4, A5,
on which is mounted to turn a worm wheel B, likewise made in sections removably
connected with each other on their faces by eye-bolts B', as is plainly indicated
in Figure 1.
On the face of the worm wheel B is arranged a suitable tool post C, for carrying
the tool D to cut the pipe with, and the said worm wheel B is in mesh with a
worm E secured on a shaft E¹, journalled in suitable bearings on the front of the
casing A, a handle E2 being on the said shaft, to turn the latter and the worm
wheel and give the desired rotary motion to the worm wheel B and the tool D
to cut the pipe. The worm wheel B and also the casing A, has registering
central openings for the passage of the pipe adapted to be engaged on its
peripheral surfaces at a number of places by sets of shoes F, F, of which the
shoes F are removably secured in a jaw G and the shoes F are similarly held
in a jaw G¹, as is plainly illustrated in the drawings, said jaw G being engaged
by the threaded end H¹ of a screw rod H, formed with a reduced portion H₂
CD 077

page_text: mounted to turn in a bearing H5 made in sections, and secured to the top of the
casing, as indicated in the drawings.
The outer end of the screw rod H is formed with a square offset H³, for applying
a suitable crank to turn the screw rod in its bearing H. The screw rod His
provided with a threaded portion H, having threads in an opposite direction to
the threads on the portion H¹, said threaded part H+ carrying a carrier I, provided
with tenon ends I engaging in bars J formed with guideways J¹ for the tenon
ends G2 of the jaw G, so as to guide the latter in its up and down movement.
The lower ends of the bars J are provided with apertures J2 for the under cut
ends G3 of the jaw G1, the latter being provided with offsets G, fitted to slide
in bearings A formed on back of the casing A, there being nuts on the other
ends of the offsets to hold the jaw against lateral movement. Springs K are
held in the casing A and press against the bars J, to hold the same in firm contact
or engagement with the carrier I and the jaw G¹.
When the operator turns the screw rod H in one direction, the jaw G with its
shoes is moved inward, and at the same time the carrier I is moved outward
in an opposite direction to the jaw G, and as the said carrier I is connected by
the bars J with the other jaw G¹, it is evident that this jaw will also move inward,
-that is toward the inwardly moving jaw G. The shoes F and F are thus
simultaneously moved inward to firmly engage the peripheral surface of the pipe
and to centre the same in the casing relative to the centre of the worm wheel B.
When the screw rod H is turned in an opposite direction, the jaw G moves outward
and the carrier I moves inward, thus moving the other jaw G outward, that is--
away from the outwardly moving jaw G. The shoes now release the pipe, to
permit its removal from the casing.
When the pipe or other article is engaged by the shoes of the jaws and the
operator turns the crank arm E², a rotary motion is given to the worm wheel B,
to carry the tool D around on the peripheral surface of the pipe, to cut the
pipe in the usual manner, it being understood that the said tool D is fed inward
by the usual feeding device on the tool post C. The tool D is, for this purpose,
removably held in a slide C, fitted to slide in bearings 2 on said tool post,
and said slide is provided with an offset C3 held on a screw rod C³, screwing in
the tool post, and provided with a handle CG under the control of the operator,
for turning the screw rod C5 and moving the slide C¹ inward, to feed the tool upon
the pipe to be cut.
From the foregoing it is evident that the casing can be readily opened, and
different sized jaws can be inserted to suit the conditions of the work under
treatment. It will further be seen that the shoes F, F¹ can be independently
removed from the jaws and different ones inserted, according to the nature of
the article to be cut.
By the construction of the worm wheel B and its bearings, it is evident that
grit and other impurities are not liable to lodge in the bearings, so that the
worm wheel has at all times a free turning movement. It will further be seen
that the cutting tool is in the immediate neighbourhood of the jaws engaging the
work, so that all unusual strain on the cutting tool is avoided, especially as the
shoes can be very firmly set on the peripheral surface of the work.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
1. A cutting machine in which a revolving cutting mechanism is arranged
in connection with a clamping mechanism comprising two jaws and a right and
left screw rod where one of the jaws is connected directly with the screw and the
other is supported on a carrier which carries one of the jaws and forms a guide
for the other jaw.
2. A cutting mechanism, in which in connection with a casing, there is pro-
vided two clamping jaws and a concentric worm wheel carrying a cutter and in

page_text: which the movement of the jaws is effected by a screw rod to which one jaw is
directly connected, while the other jaw is carried by a carrier which also guides
the first mentioned jaw, both the said first mentioned jaw and the carrier for the
companion jaw having guided movements against the casing.
Dated this 15th day of August 1899.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.