Improvements in Machines for Sawing or Cutting Metals.
Year: 1893

page_text: Date of Application, 81st Jan., 1893-Accepted, 25th Mar., 1898
COMPLETE SPECIFICATION.
Improvements in Machines for Sawing or Cutting Metals.
I, CHARLES FREMONT of 124 Rue de Clignancourt, Paris in the Republic of
France, Engineer, 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 subject of this invention is a radial machine for sawing metals without the
assistance of heat and is mainly adapted for sawing or cutting such articles as rails,
tubes and angle-irons of varying soctions. It enables such pieces of metal to be cut
at any desired angle of inclination without the necessity of deflecting or turning
them in order to vary their angle or position in relation to the saw. In this machine
the circular saw is arranged to always move in a vertical plane and is also adapted
to rotate about the vertical axis of the machine-frame, whence its term "radial"
machine. In addition to the facility of operating the saw in any vertical plane level
with the vertical axis of the machine frame, the machine offers the advantage that
the table supporting the metal bars or tubes to be cut is also adapted to turn about
the hollow upright which constitutos the main support of the machine, while the
upper plane surface of the table is capable of being inclined at the desired angle in
relation to the ground or floor whereon the machine is erected, which allows of the
bars or tubes to be cut being adjusted and retained at the particular angle of
inclination to the horizontal plane at which it is desired to cut them.
Figure 2 a plan of the machine, and
Figure 3 is a vertical section thereof showing the said operating parts.
Like letters of reference designate like parts in all figures.
The machine consists of a frame constituted mainly by a hollow upright or support a
resting upon a circular foot or base a¹. Around this cylindrical support is arranged.
a tube or sheath & formed of two parts connected together by flanges and bolts 6'.
Integral with this outer tube is a plate 6' upon which is placed a plate or disc or
corresponding shape e which is integral with the work-table d. This work-table d
whereon the bars, tubes or the like are placed for cutting is provided with grooves (l'
in which guides of any suitable ordinary shape or movable grippers are adapted to
slide for the purpose of adjusting and retaining the bar or tube in the desired
position corresponding to the nature of the cut to be made. The disc e forms an
integral part of the table d and is adapted to revolve upon the disc b' of the sheath
or casing 6, about a horizontal axis. Bolts e' fulfil the function of guides for this
disc and enable the table d to be firmly retained in position after the upper surface
of the table has been suitably inclined in relation to the plane of the floor. The
table d may also revolve about the hollow upright a owing to its connection with
the said case or sheath b. A cap a is fitted within the upper part of the cylindrical
upright a and is connected with the same by a collar c. This cap e may turn about
the said upright a in a horizontal plane and it serves as a support and guide for the
movable parts employed to impart rotary motion to the saw. For this purpose it is
provided with two ears or lugs e which support a forked lever near the end of
which is pivoted the cutting saw m and also the horizontal shaft upon which is
keyed the bevel which transmits motion to the said saw m whatever the
position' it occupies for the time being'in relation to the vertical axis of the machine-
frame.
The circular saw m, made preferably of cast steel, and the cutting edge of which
may ba either toothed or not. is suspended or hinœed below the forked lever fa

page_text: short distance from its end, which forms the operating handle g. A forked piece or
yoke & integral with or secured to the lever serves for supporting the saw-carrying
shaft. Between the arms of the fork or yoke k there is firmly secured to the shaft
of the saw a worm' wheel gearing with another worm-wheel arranged above it
upon a shaft passing through the centre of the hollow forked lever, between the
two portions and of this lover. Upon the shaft of this worm wheel / is keyed
or rigidly attached a bevel pinion gearing with the bevel wheel s¹ rigidly secured
to the horizontal shaft u.
r
The lower stationary cylindrical portion of the support a through the medium of
the pioce o carries the gearing op and also a fast and loose pulley » n'. The gear-
wheels o and p convey the motion which they receive from the fast pulley n to the
bevel wheels arranged within the upright a and thereby turn the vertical shafti
supported in the bearing y. This shaft carries round the bevel wheels arranged
above the cape between the ears or lugs c' and imparts rotary motion to the bevel
wheels and to the helical or worm-wheel thereby causing the saw m to.
rotate.
In order that the saw m may turn in one direction only there is arranged upon
the shaft un disc t provided with a ratchet tooth which operates conjointly with
the pawl having a tail piece t' which acts as a counterweight. While the shaft u
turns in the direction of the arrow, the pawl slides upon the edge of the disc and
upon the ratchet tooth without interfering with the rotation of the said shaft.
But as soon as the shaft u turns in the direction opposite to that of the arrow, the
pawl abuts against the ratchet tooth and arrests the said shaft u and conse-
quently the saw m.
This radial sawing or cutting machine operates as follows-The bars, tubes or
the like to be cut or sawed aro placed upon the table d where they are firmly
retained by grippers located within grooves d'. The table is then inclined in
relation to the horizontal line at the angle at which it is desired to cut the metal..:
The driving belt connected with the engine is then shifted from the loose pulley n'
on to the fast pulley n, whereby the toothed wheels o and p are set in motion
together with the bevel wheels rr, ss's. The wheels turns the shaft carrying
the worm wheel h, so that this wheel and the worm wheel I, and thereby also the
saw m are rotated. The forked lever is then depressed by means of the handle.g,
to bring the saw m down to the vertical plane of the intended cut through the tube
or bar secured on the table d. By pressing down the cutting edge of the saw m,
the bar or tube is cut, owing to the action of the rotating saw, and the pressure
exercised by means of the handle yg upon the bar or tube to be cut.
The cap c is provided with an index hand c which in moving along the hollow
stationary support a, which is graduated for the purpose, as at c, enables the various
angles of inclination in relation to the vertical cutting plane of the saw, to be'
exactly determined.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,―
1. A radial machine for sawing or cutting metals without the employment of heat
characterized by a hollow cylindrical upright supporting externally a table for the
reception of the bars tubes or the like to be out or sawed the said table being
adapted to turn about the said upright and also about its horizontal axis for the
purpose of inclining its upper or supporting surface at the desired angle in relation
to the horizontal line and bringing it to the proper position in relation to the
vertical plane of the saw substantially as described and illustrated in the accom-
panying drawings
2. A radial machine for sawing or cutting metals without the employment of heat
having a movable or adjustable supporting table arranged upon or around a hollow
upright which forms the main support or frame of the machine and is surmounted
by a movable cap serving as a support and guide for the movable parts whereby

page_text: the saw is rotated substantially as described and illustrated in the accompanying
drawings.
3. A radial machine for sawing or cutting metals without the employment of heat
the main support of which is formed by a cylindrical hollow upright around which
are arranged to turn a receiving or supporting table for the metal articles to be cut
and a cap to which is pivotted a lover carrying the circular saw and also the
operating mechanism which conveys motion thereto through the medium of suitable
worm gearing substantially as described and illustrated in the accompanying
drawings.
4. A radial machine for sawing or cutting metals without the employment of heat
in which rotary motion is transmitted to the saw by a combination of worm wheels
rigidly secured one to the shaft of the saw and the other to a shaft coinciding with
the longitudinal axis of the operating lever the said wheels receiving motion from a
series of bevel wheels arranged within the hollow upright and between the ears or
luga of the movable cap substantially as described and illustrated in the accom-
panying drawings.
Dated this 31st day of January 1803
W. P. THOMPSON & BOULT,
Agents for the Applicant.