Year: 1886

page_text: Wo JOHN CRAVEN and BENJAMIN CRAVEN both of Westgate Common Foundry
Wakefield in the County of York Founders and Engineers do hereby declare the
nature of our said Invention to be as follows :-
This Invention has for its object to provide a cheap and efficient machine for
moulding Bricks tiles and other articles with accuracy and economy.
We provide a bell mouthed pug mill into which the clay or other material of
which the Bricks or other articles are to be formed is placed and in which it is
kneaded or worked to the requisite consistency by inclined blades bolted or
otherwise secured to the pug shaft so as to form a species of archimedian screw.
This shaft is fitted to rotate in bearings situated above the hopper or feeding
mouth of the pug mill (there being no bearing or supports within the pug mill,)
and is provided at its lower end with two inclined blades arranged on diametrically
opposite sides of the shaft so as to rotate in contact with or in close proximity to
the bottom of the pug mill. The said shaft carries at its upper end a bevel wheel
in gear with a corresponding wheel fast on a horizontal shaft mounted in bearings
and having keyed on its outer end a spur wheel in gear with a spur pinion fast on
the first motion shaft of the machine. The bottom of the pug mill is provided
with a ring bolted or secured to the said mill and having an opening therein with
a knife or cutting edge. The part of the ring which extends over the bottom of
the pug mill serves to ensure the proper entry of the clay into the moulds and to
take some of the pressure of the clay off the table. The moulds are in a table
which is fitted to rotate horizontally beneath the pug mill. This mould table is
mounted on a vertical shaft working in bearings and is provided on the underside
with teeth in gear with a pinion fast on a horizontal shaft mounted in bearings on
the base of the machine. On the outer end of the said horizontal shaft is keyed a
spur wheel in gear with a pinion mounted loosely on a stud and formed in one
with or connected to another pinion in gear with a corresponding pinion fast on
the first motion shaft upon which are mounted pulleys by which motion is
transmitted to the machine from any suitable prime mover,
The moulds are fitted with moveable or rising pistons forming the bottoms
thereof having extensions on their underside which project below the undorsurface

page_text: of the mould table so as to be operated upon by a lever as hereinafter described for
the purpose of ejecting the moulded materials from the moulds.
The mould table is rotated and the rate of rotation thereof may be varied to suit
different kinds of clay or material (requiring more or less working) by means of
change wheels placed on the stud hereinbefore referred to.
The clay or material is forced from the pug mill through the opening in the
bottom or plate into the moulds by the inclined blades rotating in the pug mill
the screw like action of which causes the clay to be effectually compressed in the
mould and the edge of the opening through which the clay passes, clearly and
smoothly separates the clay in the mould from that in the pug mill as the table
rotates. The moulded Clay or material is ejected from the moulds by means of the
aforesaid lever which is operated at the requisite periods by a cam on the shaft
which drives the mould table so as to cause the end of the said lever to rise and
by acting upon the extensions of the mould pistons to force the said pistons
upwards until the moulded brick or material is elevated level with the upper
surface of the mould table whereupon by the continued rotation of the mould table
the extension of the mould piston passes from the end of the lever on to a rail or
platform forming part of a circle by which the moulded brick or material is
maintained in its elevated position to give time for removal the acting end of the
lever having in the mean time descended in readiness for the next operation.
1000
J. HENRY JOHNSON,
Agent for the said John Craven
and Benjamin Craven.

page_text: other similar Articles.
We JOHN CRAVEN and BENJAMIN CRAVEN both of Westgate Common Foundry
Wakefield in the County of York Founders and Engineers 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:-
Our Invention has for its object to provide a cheap and efficient machine for
moulding bricks tiles and other articles with accuracy and economy.
We will describe our Invention with reference to the accompanying drawing
which represents a machine constructed according to our Invention for moulding
bricks Figure 1 being a longitudinal section Figure 2 a plan and Figures 3 and 4
respectively the two opposite ends of the machine.
A is a bell-mouthed pug mill into which the clay or other material of which the
Bricks are to be formed is placed and in which it is kneaded or worked to the
requisite consistency by inclined blades B bolted or otherwise secured to the pug
shaft C so as to form a species of archimedian screw. The shaft C is fitted to
rotate in bearings D situated above the hopper or feeding mouth of the pug mill
(there being no bearing or supports within the pug mill) and is provided at its
lower end with two inclined blades B¹ arranged on diametrically opposite sides of
the shaft so as to rotate in contact with or in close proximity to the bottom of the
pug mill. This shaft C carries at its upper end a bevil wheel E in gear with a
corresponding wheel E¹ fast on a horizontal shaft F mounted in bearings G and
having keyed on its outer end a spur wheel H in gear with a spur pinion I fast on
the first motion shaft K of the machine. The bottom of the pug mill is provided
with a ring L bolted or secured to the said mill and shewn in plan in Figure 5
having an opening therein with a knife or cutting edge. The part of the ring L
which extends over the bottom of the pug mill serves to ensure the proper entry of
the clay into the moulds and to take some of the pressure of the clay off the table.
M are the moulds in the table M¹ which is fitted to rotate horizontally beneath the
pug mill A. The mould table M¹ is mounted on a vertical shaft N working in
bearings and has cast or bolted on the underside a bevel wheel P in gear with a
pinion Qfast on a horizontal shaft R mounted in bearings S on the base T of the
machine. On the outer end of the shaft R is keyed a spur wheel M³ in gear with
a pinion U mounted loosely on a stud V the pinion U being formed in one with or
connected to another pinion U in gear with a corresponding pinion W fast on the
first motion shaft K upon which are mounted strap pulleys ✗ by which motion is
transmitted to the machine from any suitable prime mover.
The moulds M are fitted with moveable or rising pistons m having extensions m¹
on their underside which project below the under surface of the mould table M¹ so
as to be operated upon by a lever Y as hereinafter described for the purpose of
ejecting the moulded materials from the moulds.
The mould table M is rotated and the rate of rotation thereof may be varied to
suit different kinds of clay or material (requiring more or less working) by means
of change wheels placed on the stud V hereinbefore referred to.

page_text: The clay or material is forced from the pug mill A through the opening in the
bottom or plate L into the moulds M by the inclined blades B¹ the screw like action
of which causes the clay to be effectually compressed in the mould and the edge of
the opening through which the clay passes clearly and smoothly separates the clay
in the mould from that in the pug mill as the table M' rotates. The moulded clay or
material is ejected from the moulds by means of the lever Y centred at y and operated
at the requisite periods by a cam Z on the shaft R so as to cause the end z of the said
lever to rise and by acting upon the extensions m² of the mould pistons m force
the said pistons upwards until the moulded brick or material is elevated level with
the upper surface of the mould table whereupon by the continued rotation of the
mould table the extension m¹ passes from the end of the lever onto a rail or
platform forming part of a circle by which the moulded brick or material is
maintained in its elevated position to give time for removal; the end of the
lever Y having in the mean time descended in readiness for the next operation.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed we declare that what
we claim is;-
First:--The combination and arrangement of parts constituting the machine for
moulding bricks or other articles as hereinbefore described and illustrated by our
drawings.
Second: In combination with the pug mill and mould table the plate L
Figure 5 constructed or formed substantially as and for the purpose hereinbefore
described.
Third-In machines of the class hereinbefore described the means described for
driving the mould table at the requisite and variable or alterable rate to suit
various descriptions of Clay or material operated upon.
Fourth-In machines of the class hereinbefore described the combination of the
cam operated lever Y the moveable mould bottoms m with the extensions m¹ and
the rail or platform a substantially as hereinbefore described and illustrated by our
drawings.