IMPROVED APPARATUS USED WITH PLATE ROLLING MILLS FOR TRANSFERRING INGOTS OR SLABS FROM ONE SET OF ROLLS TO ANOTHER
Year: 1883

page_text: LETTERS PATENT to Charles Davy of 24 Lawson Road, Sheffield in the
County of York for an Invention of IMPROVED APPARATUS USED WITH
PLATE ROLLING MILLS FOR TRANSFERRING INGOTS OR SLABS FROM ONE SET OF
ROLLS TO ANOTHER
PROVISIONAL SPECIFICATION left by the said Charles Davy at the Office
of the Commissioners of Patents on the 15th June 1883.
CHARLES DAVY of 24 Lawson Road, Sheffield in the County of York
"IMPROVED APPARATUS USED WITH PLATE ROLLING MILLS FOR TRANSFERRING INGOTS
OR SLABS FROM ONE SET OF ROLLS TO ANOTHER.'
"
My Invention relates to apparatus to be used in connection with plate rolling
mills for transferring from one set of rolls to another and for turning into any
desired position in front of either set of rolls the ingot or slab that is to be operated
upon. And the Invention consists in the construction combination and arrange-
ment of steam or (preferably) hydraulic crane and hoisting apparatus in connection
therewith whereby this may be accomplished.
This crane is constructed of a hollow ram or plunger which also forms the crane
post and is fitted to turn and slide in a cylinder or ram case fixed below the floor,
and of a horizontal arm or jib carried on top of the said ram, the arrangement
being such that when in its lowest position the upper surface of the jib comes level
with and forms part of the floor of the mill. The crane is fixed in such position
relatively to the cogging and finishing rolls and the radius of the jib is such that
its free end can be swung opposite to the middle of either set of rolls. A turning
table is carried at the end of the jib, being a platform supported upon a vertical
spindle mounted to rotate and slide vertically in the end of the crane jib the
construction being such as to allow of this turning table when in its lowest
position coming level with the floor of the mill which has an opening adapted to
receive the crane jib and turning platforms in either of its two positions ie opposite

page_text: either set of rolls. The raising of the turning table is effected by a hydraulic or
steam hoist which may be combined directly with the turning table the cylinder
of the hoist being cast with or carried by the crane jib and spindle of the turning
table forming the ram or piston rod of the hoist, the turning table being made to
revolve either with the ram or piston rod or independently thereof. This hoist is
supplied with water or steam by a pipe connecting its cylinder with the hollow
ram which forms the crane post and which is in free communication with the water
or steam space of its own cylinder and the area of the turntable rain proportionally
to the weight it has to raise is larger than the main ram so that the former will
rise and lift the ingot or slab clear of the floor in order that it may be turned into
-any-required_position before the main ram will begin to rise. Ŏr instead of a
single hoist carried by the crane jib and combined-directly_with_the_turning table
as above described I may provide two stationary hoists fixed one in front of each
set of rolls so as to be immediately under the turning table when in its proper
position before either set of rolls. In this case the turning table would have a
plain spindle which would merely come down on the ram of the hoist and there
would be no necessary connection between the cylinder of the latter and the main
or crane cylinder. In either case the plate or slab is transferred from the one set
of rolls to the other by raising the crane jib entirely above the floor and the
conveying rollers of the mill, swinging it through an arc and then lowering it again
to bring the plate or slab down in front of the second set of rolls.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Davy in the Great Seal Patent Office on the 14th December
1883.
CHARLES DAVY of 24 Lawson Road, Sheffield in the County of York,
"IMPROVED APPARATUS USED WITH PLATE ROLLING MILLS FOR TRANSFERRING INGOTS
OR SLABS FROM ONE SET OF ROLLS TO ANOTHER'
"
My Invention relates to apparatus to be used in connection with plate rolling.
mills for transferring from one set of rolls to another and for turning into any desirod
position in front of either set of rolls, the ingot or slab that is to be operated upon.
And the invention consists in the construction combination and arrangement of
steam or (preferably) hydraulic crane and hoisting apparatus in connection
therewith whereby this may be accomplished.
In order that my Invention may be more readily understood I have illustrated
it in the accompanying drawings and will proceed to describe it with reference
thereto.
Figure 1 shows a front elevation of the cogging and finishing rolls of a plate
rolling mill with the transferring crane applied in connection therewith the crane
being represented in section. Figuro 2 is a plan of the cogging and finishing
rolls and crane and Figure 3 is a side elevation of the cogging rolls and conveying
rolls and showing the position occupied by the crane with reference to the latter.
Figure 4 represents a modification in which stationary hoists are provided for the
turntable instead of being carried by the crane jib. The same letters of reference
indicate the same parts in all the figures.
Referring to Figures 1, 2, 3 A, A¹ are the cogging rolls and B B¹ the finishing
rolls. C are conveying rollers for the cogging mill and are intended for conveying
the ingot or slab to and from the rolls A A D aro the conveying rolls for the
finishing mill and are for the purpose of conveying the slab or plate to and from
the rolls B B¹. E is the transferring crane. This crane is constructed of a horizontal
arm or jib E carried on the top of a hollow rain or plunger E¹ which also forms
the crane post and is fitted to turn and slide in a cylinder or ram case E³ fixed
below the floor. The ram E passes through suitably packed bearings at both the
top and bottom ends of its cylinder E in order to obtain a sufficiently long
bearing. It is made of two diameters and has a shoulder which when the ram is
in its lowest position rests on the bottom of the cylinder. The ram slides and
turns in its bearings and is hollow and open to its cylinder E by an orifice e to
admit water or steam to the interior to raise the ram and for a purpose hereafter
described. The arrangement of the crane is such that when in its lowest position
the upper surface of the jib comes level with and forms part of the floor of the mill.
The crane is fixed about midway between the cogging rolls A A' and the finishing
rolls B B' and at a convenient distance in front thereof preferably so that the
crane will come between the first and second conveying rollers of each mill and
the radius of the jib is such that its free end can be swung opposite to the middle
of either mill A A¹ or B B¹. A circular turning table F is carried at the end of
the jib E being a platform supported upon a vertical spindle F¹ mounted to rotate
and slide vertically in the end of the crane jib E which is so constructed as to allow
of this turning table when in its lowest position coming level with the floor of the
mill. The floor has an opening adapted to receive the crane jib and turning
platform in either of its two positions ie. opposito either set of rolls. The raising
of the turning table is effected by a hydraulic or steam hoist which may be
combined directly with the turning table as shown in Figure 1 the cylinder G of

page_text: the hoist being cast with or carried by the crane jib E and the spindle F¹ of the
turning table forming the ram or piston rod of the hoist, and turning with the
table or the latter may be made to revolve independently of the ram
This hoist G
is supplied with water or steam by a pipe H connecting its cylinder G with the
hollow ram E¹ which forms the crane post and which is in free communication with
the water or steam space of its own cylinder E' as above described. The area of
the turntable ram F¹ proportionally to the weight it has to raise, is larger than
that of the main ram E¹ so that on steam or water being admitted by pipe I to
the main ram, the turntable ram will rise and lift the ingot or slab clear of the
floor in order that it may be turned into any required position before the main
-ram.ELwill begin_to_rise.
Instead of a single hoist carried by the crane jib-and-combined.directly with the
turning table as above described and shown in Figures 1 and 2, I may provide two
stationary hoists G (one being shown in figure 4) fixed in such positions as to be
immediately under the turning table when in its proper position before either set
of rolls. In this case the turning table F would have a plain spindle F1 which
would merely come down on the ram G₁ of the hoist and there would be no
necessary connection between the cylinder G of the hoist and the main or crane
cylinder E².
d
In either case the plate or slab is transferred from the one set of rolls A A' to the
other set B B¹ by raising the crane jib entirely above the floor and the conveying
rollers of the mill swinging it through an are and then lowering it again to bring
the plate or slab down in front of the second set of rolls. The hoisting and
turning motion of the turntable obtained independently of that of the main ram
as above described, is available for turning the ingot into position before tho
cogging rolls or the plate or slab into position before the finishing rolls as the case
may be.
Having described the nature of the said Invention and the manner of performing
the same I declare that what I claim as the Invention to be protected by the
hereinbefore in part recited Letters Patent.is:-
1 The combination with a hydraulic or steam crane constructed substantially
as herein described of a turntable at the end of the crane jib, and the employment
thereof in connection with the cogging. and finishing rolls of a plate rolling mill
substantially as and for the purpose specified;
2nd The combination with a hydraulic or steam crane constructed substantially
as herein described of a turntable and hydraulic or steam hoist at the end of the
crane jib substantially as herein described in reference to figures 1, 2, and 3 and
the employment thereof in connection with the cogging and finishing rolls of a
plate rolling mill.
3rd The combination with a hydraulic or steam crane constructed substantially
as berein described of a turntable at the end of the crane jib capable of turning
and moving up and down independently thereof, and of two hydraulic or steam
hoists fixed in proper positions for raising the turntable and the employment
thereof in connection with the cogging and finishing rolls of a plate rolling
mill substantially as and for the purposo specified.
In witness whereof I the said Charles Davy, have hereunto set my hand and
seal this thirteenth day of December A.D. 1883.