Year: 1897

page_text: Date of Application, 28th Aug., 1897-Accepted, 5th Feb., 1898
Figure b is a longitudinal sectional elevation.
Figure 6 is a transverse sectional elevation through the motor.
Figure 7. is a sectional elevation showing manner of operation of the tool for
the purpose of cutting tubes.
Figure 8 is a side elevation of the rotary piston in motor.
Throughout the drawings similar letters refer to the same or similar parts.
It will be noted from the drawings that the tool consists mainly of a rotary
fluid motor of simple and durable design, which motor is provided with a suitable
means for controlling the supply of the actuating fluid, and the motion of which
motor is transmitted through suitable gearing to a spindle, bearing at or near its
extremity the cutting or polishing tool. The whole tool is so arranged, that it
can be suspended from a convenient point, and the means of suspension will
permit of the tool being bodily turned, or rotated by means of the hand wheel
attached to the machine.
Referring to the drawings, it will be seen that the body of the motor consists
of the parts A and A¹, which parts are securely bolted together, and are bored
out to form a cylinder for the circular rotary piston B. This piston is provided
with a slot C, through which the piston blades D and D¹ can slide freely, these
blades being kept in close connection with the walls of the cylinder by means of
the springs E, secured in the distance piece F. From the ends of the piston B
project the short spindles G and G¹, which are turned true and otherwise suitably
prepared to run in the bearings provided for them and thus support the piston
in its proper position. These bearings are provided with suitable packing glands
to prevent the escape of the actuating fluid.
The ends of the cylinder are formed by the covers H and H', which are arranged
to screw on to the body A and A¹. In the upper portion of the body of the

page_text: motor, ports or passages J and J¹ are provided for the admission and escape of the
actuating fluid. A small blade or abutment piece K is also provided in a suitable
recess in the body of motor, and this abutment piece is kept in close contact with
the body of the piston B by means of springs, as shown, thus preventing the
escape of fluid from one side of the piston to the other.
The spindle G, formed at one end of the piston B, is fitted with the toothed
wheel L running in gear with the smaller toothed wheel M, which actuates the
larger toothed wheel N running on the same axis. This latter wheel runs in
gear with a smaller toothed wheel O, to which is connected the spindle Q, the
result being that the latter spindle will make a greater number of revolutions
than the piston B, in accordance with the arrangement of the gearing, as shown.
The gearing may be arranged, so as to decrease the number of the revolutions of
the spindle, or it may be dispensed with altogether, and the spindle Q be connected
direct with the end G of piston B. The gearing above referred to is contained in a
suitable receptacle, provided upon the cylinder cover H, and is enclosed by the
cover P, suitable bearing being provided for the gearing and the spindles.
Near the extremity of the spindle Q the cutter R is attached in a suitable
manner. The tool shown is such as would be used for the purpose of cutting
tubes, but any other tool or appliance may be attached, according to the work,
which is proposed to be done.
The fluid is admitted to the motor through the tube S, the supply being regu-
lated by means of the piston valve T, which is operated from the sleeve U. The
latter can be slid to and fro on the pipe S, and, being connected with the valve T
by means of a suitable yoke and spindle, the supply can be readily and efficiently
controlled.
The fluid, which enters through the pipe S, passes through a suitable connection
to the port J, where it enters the cylinder of the motor, and impinges on the
blade D¹, causing the latter to move in the direction of the port J, and so
rotating the piston B. It will be noticed that the latter is not placed in the centre
of the cylinder, but is so arranged that, whilst one blade presents a large surface
to the action of the actuating fluid, the other blade is not at all subject to this
pressure. Hence back pressure is avoided, and the full benefit of the actuating
fluid is secured in the desired direction.
It will be seen that, as the blade D¹ travels towards the port J¹, it will be forced
further into the slot C, as the distance between the body of the piston B and the
cylinder walls, decreases. This will cause the opposite blade D to be forced
outward, and the latter will be exposed to the full force of the incoming fluid
when the blade D' reaches the exhaust port J¹ and this permits the escape of the
fluid contained in the cylinder between the blades D and D. The machine may
be suspended or slung in the manner shown, or in any other convenient way. The
clamp is made in halves, and so arranged that the machine can be turned or
rotated bodily by means of the hand-wheel 2. The clamp is fitted with projec-
tions to hold bolt or pin, which latter will engage with the suspension hook.
Figure 7 shows one way in which the tool, as set forth in the drawings, may be
used. X is the tube plate of a boiler, and Y is a tube projecting through such
plate. It is desired to cut the tube Y off at a point, which will allow just
sufficient margin for heading. The sleeve Z is made to fit on to the exterior of
the tube to be cut, and also on to that part 3 of the tool, which forms a bearing
for the spindle Q. Part 3 is fitted with an inner bush 4, through which the
spindle passes, this bush being made with a collar, suitably arranged to rotate it
by hand The hole for the spindle Q is not bored through the centre of the bush 4,
and the latter is not concentric with the part 3. There is thus a double eccen-
tricity, and this enables the spindle Q to be placed exactly in the centre of the
sleeve Z, or thrown out of centre to any desired amount, suitable stops being
arranged, so that the cutter is firm whilst in operation. When desired to operate,
the spindle Q is placed central, so that the cutter R will enter the tube. The
sleeve Z, which may be altered to suit convenience, will connect the tool with the

page_text: tube to be cut, and steady the machine during the process of cutting, whilst at
the same time it determines the distance at which the cutter R is to operate,
from the tube plate X. When this sleeve is fitted, the motor may be started by
means of the sleeve U and valve T, as previously described, and the cutter R will
consequently revolve rapidly. By rotating the collar of bush 4 the cutter R is
thrown out of centre until it engages with and cuts through the tube. The wheel 2
is then used to rotate the whole machine bodily by hand, the supply pipe attached
to tube S being so arranged as to permit this. This will cause the cutter R to
travel in a circular orbit, whilst at the same time it is revolving on its own axis,
and in doing so the end of the tube will be cut off.
It will, therefore, be seen that by suitably arranging the eccentric bush 4, and
the collar Z, tubes of any diameter can be cut off at any required point, and if
desired to cut a variety of sizes, a series of parts corresponding to 3, 4 and Z can
be arranged so as to be quickly fitted to or removed from the machine.
On some classes of work the eccentric bushes 3 and 4, the collar Z and the
cutter R may be dispensed with, and a brush or cleaner of suitable construction
may be attached to the end of the spindle, which latter may be made of any
convenient length.
It must be understood that we do not confine ourselves to the exact details
shown in drawings, as modifications may be made to suit particular requirements
without departing from the general principle of arrangement and combination.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In a power-driven tool the combination with a rotary fluid motor, of the
arrangement for controlling the supply of the actuating fluid, the arrangement for
transmitting the motion to the operating tool, and the arrangement for con-
straining such tool to travel in a desired orbit whilst rotating on its own axis by
means of the double eccentric and the hand wheel, all substantially as shown and
described in the drawings and specification attached.
2. The combination or arrangement and use of parts of mechanism forming a
portable power driven tool for eutting, cleaning or polishing tubes and for other
similar purposes, substantially as and for the purpose set forth and as shown in
the accompanying drawings.
Dated the 28th devy of August 1807
the 28th day of August 1807
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.