IMPROVEMENTS IN MACHINERY FOR MAKING MOULDS TO BE EMPLOYED WHEN CASTING METAL."
Year: 1863

page_text: LETTERS PATENT to Robert Jobson, of Dudley, in the County of Wor-
cester, for the Invention of "IMPROVEMENTS IN MACHINERY FOR MAKING
MOULDS TO BE EMPLOYED WHEN CASTING METAL."
PROVISIONAL SPECIFICATION left by the said Robert Jobson at the Office
of the Commissioners of Patents, with his Petition, on the 18th June
1863.
I, ROBERT JOBSON, of Dudley, in the County of Worcester, do hereby
declare the nature of the Invention for "IMPROVEMENTS IN MACHINERY FOR
MAKING MOULDS TO BE EMPLOYED WHEN CASTING METAL," to be as follows:-
This Invention has for its object "improvements in machinery for making
moulds to be employed when casting metal. When using what is known as a
turn-over table whereon to form moulds to be employed when casting metal,
the table requires to be raised and lowered and to be turned over.
Now according to my present Invention I combine with such descriptions of
tables machinery by which the raising and lowering of the table may be accom-
plished by hydrostatic or hydraulic power, and I also in some cases arrange
such descriptions of tables in combination with mechanism to turn over the
table by hydrostatic or hydraulic power, or the turning over of the table is
accomplished by wheel and pinion or by wheel and screw, so that the turning
over of the table may be effected by mechanism or hydrostatic power, by which
means moulds of large dimensions and of great weight may be made with
greater facility and advantages than heretofore has been the case.
The manner of applying hydrostatic or hydraulic power to a turn-over
table both for raising and for turning it over may be greatly varied, and although

page_text: more than one hydrostatic or hydraulic cylinder may be used to raise and
lower a table, it is preferred that there should be only one hydrostatic or
hydraulic cylinder used to a turn-over table, and that it should be placed below
such table and arranged by its ram to give motion simultaneously to two or
more columns or uprights on which the bearings of the axes or necks of the
turn-over table are placed.
The columns may in some machines be arranged to be moveable so as to
admit of different sizes of tables being used therewith, the mechanism used for
transmitting the power simultaneously from the ram of the hydrostatic or
hydraulic cylinder being varied accordingly. In place of employing bydrostatic
or hydraulic power to act in a ram, steam power may be arranged to act on a
piston or pistons so as to raise and lower a turn-over table and also to turn over
such table, but hydrostatic or hydraulic power is preferred. When using a turn-
over table with a rising and falling platform then the raising and lowering
of such platform is accomplished by hydraulic or hydrostatic power as before
mentioned.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Jobson in the Great Seal Patent Office on the 18th
December 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ROBERT
JOBSON, of Dudley, in the County of Worcester, send greeting.
WHEREAS er most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of June, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Robert Jobson, Her special licence that I, the said Robert Jobson, my
executors, administrators, and assigns, or such others as I, the said Robert
Jobson, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY
FOR MAKING MOULDS TO BE EMPLOYED WHEN CASTING METAL," upon the condition
(amongst others) that I, the said Robert Jobson, my executors or adminis
strators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of
the said Invention, and in what manner the same was to be performed,

page_text: and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Robert Jobson, do hereby declare the
nature of the said Invention, and in. what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement
thereof, that is to say:-
This Invention has for its object improvements in machinery for making
moulds to be employed when casting metal. When using what is known as a
turn-over table whereon to form moulds to be employed when casting metal, the
table requires to be raised and lowered and to be turned over.
Now according to my present Invention, I combine with such descriptions
of tables, machinery by which the raising and lowering of the table may be
accomplished by hydrostatic or hydraulic power, and I also in some cases
arrange such descriptions of tables in combination with mechanism to turn
over the table by hydrostatic or hydraulic power, or the turning over of
the table is accomplished by wheel and pinion, or by wheel and screw, so that
the turning over of the table may be effected by mechanical or bydrostatic -
power, by which means moulds of large dimensions and of great weight may be
made with greater facility and advantages than heretofore have been the
case.
The manner of applying hydrostatic or hydraulic power to a turn-over table
both for raising and for turning it over may be greatly varied, and although
more than one hydrostatic or bydraulic cylinder may be used to raise and lower
a table it is preferred that there should be only one hydrostatic or hydraulic
cylinder used to a turn-over table, and that it should be placed below such table
and arranged by its ram to give motion simultaneously to two or more columns
or uprights on which the bearings of the axis or necks of the turn-over table are
placed.
The columns may in some machines be arranged to be moveable, so as to
admit of different sizes of tables being used therewith, the mechanism used for
transmitting the power simultaneously from the ram of the hydrostatic or
hydraulic cylinder being varied accordingly. In place of employing hydrostatic
or hydraulic power to act on a ram steam power may be arranged to act on a
piston or pistons so as to raise and lower a turn-over table, and also to turn over
such table, but hydrostatic or hydraulic power is preferred. When using a
turn-over table with a rising and falling platform then the raising and lowering
of such platform is accomplished by hydraulic or hydrostatic power as before
mentioned.

page_text: to describe the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shews a plan of a turn-over table, and Figure 2 a plan of the
machinery combined therewith, the table itself being removed to shew the
arrangements below; Figure 3 shews a side elevation of the table and mecha-
nism; and Figure 4 shows an end view of the machinery.
a, a, is the framing, which is to be supported on walls of masonry or other-
wise. The upper part of the hydraulic cylinder b comes under the centre of the
turn-over table c; at the lower part of the cylinder 6 there is a recess to
receive packing, and also a gland 6 fixed to the lower part of the cylinder b
by screw bolts and nuts d. The hydraulic cylinder is fixed in the framing a, a,
and remains stationary therewith; e, e, are two cylindrical columns or uprights
which are guided in their movements up and down by guides fixed to the
framing a, a. Each of these columns has a toothed rack f fixed to it which
gears with a cog wheel 9. and the two cog wheels gear with two other toothed
racks h, h, which are fixed on the lower end of the ram i of the hydraulic
cylinder, and such racks rise and fall with the ram i, and they are guided by
notches in the flange b' of the hydraulic cylinder. In the arrangement shewn
a slide valve is used in a suitable valve chamber k, fixed to the framing a, a,
into which water under pressure is supplied by means of a pipe l. This valve
chamber has an inlet pipe m, which is connected to the hydraulic cylinder,
and it has also an outlet or water waste pipe n, through which the water or
other fluid used may escape from such cylinder. The bearings of the axes or
necks of the turn-over table are carried by the upper ends of the columns
or uprights e, e. The slide valve is actuated by a bell-crank lever o, which by
a rod p is connected to the lever q, which is acted on by the tappets r' on the
rod r, which is fixed at its upper end to one of the columns or uprights, so
that it rises and falls with. the turn-over table. In the arrangement shewn the
weight of the turn-over table and the parts connected therewith is sufficient to
bring down the table, when the water or other fluid is allowed to flow out of
the hydraulic cylinder, and it will be observed, that when the water or other
fluid under pressure enters the hydraulic cylinder and forces down the ram the
strain is wholly within the machine, and the same is not brought on the points
of support, which is the arrangement of mechanism preferred to be employed
when carrying out my Invention; but it will be obvious to engineers and
machinists that this may be varied. In the arrangement shewn the turn-over
table is retained in position when turned with its surface upwards or down-

page_text: wards by means of a pin or bolt passed through the fixed arm s into one or
other of the holes t, t, in the turntable. When a turntable is to be turned over
by mechanism this may be done in different ways; one is by having a toothed
sector rack or wheel on one of the necks or axes of the turn-over table, and to
actuate the same by a screw, as shewn, or by a pinion on a suitable cranked
or other axis, or such turning over of the table may be by means of an bydraulic
cylinder, the ram of which is connected with one of the axes or necks of the
turn-over table in such manner as to communicate a half revolution to such
axis or neck, and consequently to the table. In order to receive and remove
a mould from the table when turned over, a platform is constructed and fixed
at the upper part of the framing and below the table, and a suitable truck on
wheels is run on rails fixed on the platform into position to receive the mould.
Stationary wheels are applied to bars or girders fixed to the framing a, on
which a moveable platform is moved under and from the table. In some cases
moulding tables are allowed to remain stationary whilst a platform is made to
rise and fall under the table; when such an arrangement of machinery is em-
ployed, then, in place of the apparatus above described being combined with
the table, such apparatus is applied to the rising and falling platform. In place
of the cog wheels and racks for simultaneously raising and lowering the
column or uprights, other arrangements of mechanism may be employed
when working the machinery by hydraulic or steam power applied below the
rising and falling table or platform, such as levers or beams with sector racks
taking into the racks on the columns or uprights, or such sectors may be
caused to work with chains or bands connected respectively with the sectors
and columns or uprights.
Having thus described the nature of my Invention, and the manner of
performing the same, I would have it understood that I make no claim to any
of the mechanical parts separately; but what I claim is the combining of
bydraulic or hydrostatic or steam power to rising and falling moulding tables,
and to rising and falling platforms used with moulding tables, as herein
described.
In witness whereof, I, the said Robert Jobson, have hereunto set my
hand and seal, this Sixteenth day of December, in the year of our
Lord One thousand eight hundred and sixty-three.
ROB. JOBSON. (L.S.)