Improvements in Stops or Gauges for Use in Connection with Bloom Shearing Machines.
Year: 1888

page_text: Date of Application, 2nd Mar., 1888
Complete Specification Left, 3rd Dec., 1888
Complete Specification Accepted, 22nd Jan., 18
Improvements in Stops or Gauges for Use in Connection with
Bloom Shearing Machines.
I, CHARLES DAVY, of 30 Whitworth Road, Ranmoor, Sheffield, in the County of
York, Engineer, do hereby declare the nature of this invention to be as follows:-
In the operation of cutting up ingots or blooms, or similar large bars of iron or
steel, it is customary, to enable varying lengths to be cut, to employ a hydraulic stop
or gauge against which the ingot or bloom travelling upon live rollers is brought
into position opposite the shears.
Owing to this stop and its connections being fixed permanently over the live rollers
the cut lengths or pieces cannot readily be conveyed away from the shears.
It is the object of my Invention to obviate this inconvenience, and to this end my
invention consists in a stop or gauge capable of being temporarily raised or with-
drawn so as to form no obstruction to the removal of the severed lengths or pieces
and enable them to be conveyed away without difficulty either on live rollers or by
means of a crane.
The stop consists, preferably, of a bydraulic ram carried by a lever which is mounted
on trunnions in a fixed standard or support so as to be capable of being partially
rotated therein by means of a small hydraulic ram acting on the short arm of
the lever.
The inner end of the ram constituting the stop is provided with a head or enlarge-
ment to form an abutinent for the bloom or ingot, and the ram is preferably a double
acting ram in order that the stop may be readily adjusted in relation to the shears
for cutting varying lengths.
To avoid the necessity of hand measurement, I employ a graduated bar which is
attached to the ram head and slides back and forth therewith in guides on the
cylinder. By means of this graduated bar, the length to be cut off may be ascertained
at a glance.
C. DAVY.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: Improvements in Stops or Guages for Use in Connection with
Bloom Shearing Machines.
I CHARLES DAVY of 30 Whitworth Road, Ranmoor, Sheffield, in the County of
York 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 :-
In the operation of cutting up ingots or blooms, or similar large bars of iron or
steel into pieces of various lengths, it is customary to employ a stop or guage by
which the ingot or bloom travelling upon live rollers is arrested in position to be cut
to the desired length by the shears, this stop being adjusted and held in position by
means of hydraulic power.
In consequence of the hydraulic stop being permanently located immediately
above the live rollers, the cut lengths or picces cannot be readily conveyed away from
the shears.
It is the object of my invention to obviate this inconvenience, and my invention
consists in a stop or guage capable of being temporarily raised or withdrawn so as,
after serving the purpose of a stop or guage, to no longer obstruct the onward motion
of the severed length or piece but permit it to be conveyed away without difficulty
either on live rollers or by means of a crane.
The preferred arrangement to mount the hydraulic stop upon a lever operated by
a hydraulic ram, and so arranged that by the rocking of the lever the hydraulic stop
will be raised out of the way.
To avoid the necessity of hand-measurement a graduated bar is attached to the
stop and moves therewith and serves to denote with reference to a fixed index the
distance of the stop from the shears and thus to guide the workmen in adjusting
the stop to suit the length of the bloom to be cut.
Reference is to be had to the accompanying drawings forming part of this specifi-
cation in which figure 1 is a plan; figure 2 a longitudinal section (on line 1-1) and
figuro 3 a cross section (on line 2-2) of the preferred arrangement of the improved
hydraulic guage stop. Figure 4 is a longitudinal section on a larger scale of the
buffing gear shown in figure 2. Similar letters of reference serve for like parts in
all the figures.
A is the guage stop attached to a piston B working in a cylinder by hydraulic
pressure. Dare the live rollers upon which the length of bloom or ingot is supported
after being cut off by the shears. In the arrangement illustrated the cylinder B is
carried at the end of the longer arm E of a lever constituted by a frame mounted to
oscillate on trunnions mounted on standards F, the axis of oscillation being at one
s de of the set of rollers D and parallel with the direction of motion of the bloom
thereon.
The two members E¹ E which constitute a shorter arm of the lever are coupled by
links to a ram H working in a hydraulic cylinder I mounted on the frame F and

page_text: by this means the hydraulic cylinder C may be moved through an arc as shown in
figure 3 so as to bring it into position to act as a guage stop above the rollers DD,
or move it out of the way at will.
This ram H may be either single acting as shown, or double acting with levers or a
rack and pinion arrangement may be used in lieu of the levers.
This gauge stop is preferably carried by a double acting ram, that is to say a
piston B with a thick rod, the inner face of the piston having a large area to take the
shock of the bloom meeting the stop A and the area of the annular outer face being
just sufficient to enable the hydraulic pressure to move the stop backwards when it is
desired to adjust it at a greater distance from the shears.
In the oscillating arrangement illustrated, water is conveyed to the cylinder C by
pipes K L connected through stuffing box-joints (which are axially coincident with the
axis of oscillation of the lever E) with pipes connected with opposite ends of the
cylinder ().
The pipe K is connected directly with the accumulator and the pipe L is also put
in communication therewith when required, through a regulating valve.
In the example illustrated, the pipe & is also connected through a pipe m with a
cylinder M and the pipe is similarly connected through a pipe n with a cylinder N,
the cylinders M N being in line, and having a ram O common to both but of different
diameters and acted on in opposite directions in the two cylinders, as hereafter
described, the area of the ram in cylinder M being rather greater than that of the
opposite end of the ram. This constitutes a hydraulic buffer to reduce the shock of
the bloom striking the stop A.
To the gauge stop A is attached a measuring bar R extending alongside the
cylinder Cand sliding in a guide thereon, this har being divided in feet and inches,
and serving to indicate, with reference to a fixed pointer, the distance of the face
of the gauge stop A from the line of cut of the shears, and consequently the length
of the bloom which will be cut off at different positions of the gauge stop.
By this means, the gauge stop may be readily adjusted for cutting a bloom into
any number of equal or unequal lengths, without the necessity of hand measurement.
The gauge stop A is adjusted in the forward direction according to the required
length of the bloom to be cut by admitting pressure to the larger face of the piston B
through the pipe L and regulating valve which is then closed to lock the water in
the rear end of the cylinder C; or the stop may be adjusted in the opposite direction
by allowing a part of the water at the rear end of the cylinder C to escape through
the regulating valve which is provided with an exhaust for the purpose, the valve
being closed as before after such adjustment.
The operation of the hydraulic buffer is as follows:-The end of the ram in
cylinder N being of greater area than the opposite end and being constantly under
accumulator pressure the ram O normally occupies the position shown. When how-
ever on the bloom striking the gauge stop A the piston B is forced backwards, the
pressure on the smaller end of the ram O temporarily preponderates and the ram O
is forced inte the cylinder M but as soon as the momentum of the bloom is absorbed
the accumulator pressure prevails and acting through the ram O on the larger face of
the piston B returns it to the position it occupied when struck by the bloom, the
limitation of the motion of the ram O by the cylinder N preventing the return of
the piston B beyond the point at which it was set. The gauge stop on this return
motion carries back the bloom to the proper position for cutting. Any ordinary valve
gear may be used to control the admission and exhaust of the hydraulic pressure to
and from the cylinder for oscillating the lever E E for the purpose of placing the
stop in operative position or of raising it out of the way.
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
laim is.
1. An hydraulic gauge stop for bloom-shearing machines mounted to swing on a
rocking lever so arranged that the gauge stop may by such rocking motion be removed

page_text: out of the path of the bloom on the live rollers or brought into operative position
above the same at will, as described.
2nd. The combination, with a hydraulic gauge stop and rocking lever carrying the
same, of a bydraulic rain applied to operate the rocking lever, substantially as shewn
and described.
3rd. The combination with a hydraulic gauge stop of a measuring bar and index,
as and for the purpose specified
Dated
Dated this ørd day of December 1000.
C. DAVY.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.