Improvements in Presses for Brick Making Machines.
Year: 1897

page_text: Date of Application, 30th Oct., 1897
Complete Specification Loft 15th July 1800. Accented 20th Aug
1000
Date of Application, 30th Oct., 1897
Complete Specification Loft, 15th July, 1908 Accepted, 20th Aug
1800
PROVISIONAL SPECIFICATION.
Improvements in Presses for Brick Making Machines.
We Tos. C. FAWCETT, LIMITED, of The Whitehouse Engineering Works,
Hunslet, Leeds, Yorkshire, Engineers, and JAMES DAWSON FAWCETT, of the same
place, Engineer, do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to presses for pressing and moulding bricks, and our
jimprovements may be applied in connection with the press proper, or in combina-
tion with the brick making machine. The top pressing plate in both the above
named machines is operated by toggle jointed levers, and the brick to be pressed
is squeezed in a mould; the primary object of our improvements being not only
to press the brick within the mould but in addition thereto to cause the brick to
move up and down within the mould, say three quarters of an inch more or less,
for the purpose of putting a finish or polish upon the said brick.
To accomplish our object the bottom of the moulding box is in connection with
and controlled by a lever passing under the machine, the opposite end of said lever
being in connection with short toggles, which when operated in one direction com-
press spiral springs placed horizontally. One advantage of employing toggles, is
that whilst they compress the springs in one portion of their upward movement they
can rise to almost a horizontal position without any further movement of the
springs consequently the compression of the springs is not equal to the upward
movement of the toggles.
According to our invention the brick is held between two opposing forces, the
toggles and springs of the lever holding the bottom of the brick against the
pressure of the top pressing plate, but the said bottom lever yields to the pressure
of the upper plate. On the other hand when the upper plate is commencing to
ascend the bottom plate (through the pressure of the toggles and springs) follows
after the brick consequently it is held between two powerful pressures exerted at
both top and bottom, at the same time the brick is slided within the mould box
whilst under considerable pressure, consequently its sides are polished and
smoothed. Instead of using toggles and springs placed horizontally for acting
on the lever underneath the machine, one or more vertical springs may be employed
for the same purpose.
Dated this 29th day of October 1897.
тарт
We THOS. C. FAWCETT, LIMITED, of The Whitehouse Engineering Works,
Hunslet, Leeds, Yorkshire, Engineers, and JAMES DAWSON FAWCETT, of the same
Di Q71

page_text: place, 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; -
This invention relates to presses for pressing and moulding bricks, our improve-
ments being applicable either in connection with the press proper, or in com-
bination with the presses of a brick making machine. The top pressing plate in
both the above named machines, is operated by toggle jointed levers, and the
brick to be pressed is squeezed within the mould; the primary object of our
improvements being not only to press the brick in the ordinary manner within the
mould, but in addition thereto, to cause the said brick to move or slide up and
down within the mould, say three quarters of an inch more or less, for the pur-
pose of putting a finish or polish upon the said brick.
Our improvements are illustrated in the accompanying drawing, which shews
such portions of a brick press as are necessary to illustrate the application thereto
of our improvements. A is the standard or framework of the machine, B the
table and C the mould, formed within the said table. The bottom plate D of the
moulding box C is moveable up and down the said box, this being effected through
the medium of the lever E working upon a fulcrum at F, one end of which lever
surrounds a vertical rod G. Upon the vertical rod G are bosses or lugs H and I.
which are moved nearer together or further from each other by toggle levers J
and L, acted upon by strong spiral springs M, surrounding the horizontal rod G¹
When the clay or other material has been placed into the moulding box, the top
presser N is brought down by a pair of toggle levers, (not shewn in the drawing)
the clay or brick being thus held between two opposing forces, that is to say, the
said brick is resting upon the upper surface of the lower plate D, forced upward
by springs M, whilst the upper surface of the said brick, has pressure put upon
it by the upper pressing plate N, which when forced down with all its pressure,
compresses the brick between the two surfaces, causing the lower plate D to slightly
descend, thus overcoming the pressure of the springs M. But when the upper
plate N commences to ascend, the bottom plate, through the pressure of the toggles
and springs, follows after the brick, consequently it continues to be held and com-
pressed between two powerful pressures even after the pressure on the upper plate
is lessened; thus the said brick P is slided up within the moulding box whilst under
considerable pressure, consequently its sides are polished and smoothed.
It is obvious that instead of using toggles and springs M arranged horizontally
for acting on the bottom lever E, that the said springs and toggles may be placed
in a vertical position for effecting the same purpose.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In a machine for pressing bricks the employment therein of a loose bottom
pressing plate such as I made to move up and down within the moulding box C
in the manner and for purposes substantially as herein shewn and described.
2. In a machine for pressing bricks, the employment therein of a loose bottom
pressing plate D, caused to be moved upward by lever E and springs M and
toggles J and L, all operated in the manner shewn, and for purposes described.
Dated this 14th day of July 1898.
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for the Applicants.