An Improvement relating to the Lubrication of Clay Issuing from Pug Mills employed in the Manufacture of Bricks, Tiles, and the like.
Year: 1892

page_text: Date of Application, 11th Aug., 1892
Complete Specification Left, 10th May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
An Improvement relating to the Lubrication of Clay Issuing from
Pug Mills employed in the Manufacture of Bricks, Tiles, and
the like.
We, JONAS DAVIS, of Fitzroy Road, Chester_Park, Fishponds, Bristol,
Engineer and Brickmaker, and THOMAS HUGHES DELABERE MAY, of Mont-
pelier House, Lansdowne Road, Bath, Gentleman, do hereby declare the nature
of this invention to be as follows:-
:-
This invention relates to the lubrication of clay issuing from pug mills employed
in the manufacture of bricks, tiles and the like. It consists in applying the
lubricant under pressure to the clay at or about the front end of the pug mill,
that is to say, the lubricant is applied to the clay before it enters the die.
The lubricant which may be oil, water, or other suitable fluid, with which
may, if desired, be mixed colouring matter or liquid, is forced, by means of a
pump or pumps, or by air steam or other pressure, into the pug mill at one or
both sides thereof and lubricates the clay as it passes to the die. Less power is
accordingly required to move the clay.
By lubricating it at the point indicated the clay is assisted to pass into and
through the die in a regular and uniform manner. Cracking of the clay at the
corners is obviated and no additional lubrication is required in the die or on the
cutting table.
Dated this 10th day of August 1892.
NICHOLAS WATTS,
Agent.
COMPLETE SPECIFICATION.
An Improvement relating to the Lubrication of Clay Issuing from
Pug Mills employed in the Manufacture of Bricks, Tiles, and
the like.
We, JONAS DAVIS, of Fitzroy Road, Chester Park, Fishponds, Bristol,
Engineer and Brickmaker, and THOMAS HUGHES DELABERE MAY, of Mont-
pelier House, Lansdowne Road, Bath, Gentleman, do hereby declare the mature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement :-
This invention relates to the lubrication of clay issuing from pug mills employed
in the manufacture of bricks, tiles and the like. It consists in applying the
lubricant under pressure to the clay at or about the front end of the pug mill, that
is to say, the lubricant is applied to the clay before it enters the die.
The lubricant, which may be oil, water, or other suitable fluid, with which may,
if desired, be mixed colouring matter or liquid, is forced, by means of a pump or
pumps, or by air, steam or other pressure, into the pug mill at one or both sides
thereof and lubricates the clay as it passes to the die. Less power is accordingly
required to move the clay.
By lubricating it at the point indicated the clay is assisted to pass into and
through the die in a regular and uniform manner. Cracking of the clay at the
corners is obviated and no additional lubrication is required in the die or on the
cutting table.
At Fig. 1 in the accompanying sheet of drawings is shown, partly in side
elevation and partly in section; apparatus illustrating our invention. Fig. 2 is an
end view.

page_text: From the mouthpiece a of the pug mill extends a pipe which communicates
with a tank c containing the oil for lubricating the clay in its passage through the
said mouthpiece a. The pipe b, which is fitted with a controlling cock b¹, may
have one or more inlets into the mouthpiece. The lubricant may be injected into
the mouthpiece a in any suitable manner and by any suitable means.
According to the method illustrated in the drawings the oil is forced into the
mouthpiece a by the pressure of the water contained below the oil in the tank c
which water is formed by condensation of steam obtained from a boiler and con-
ducted by the pipe d into the tank. The line x, x Fig. 1 indicates the top of the
water and the bottom of the supernatant oil. The steam pipe is fitted with a
controlling cock d'. With the injecting apparatus shown in the drawing the feed
of lubricant to the mouthpiece a is continuous so long as the tank c is kept charged
with it and with condensed steam.
The clay is lubricated before passing into the die e and is thus assisted to pass
into and through the die in a regular and uniform manner and no further lubrica-
tion is required either in the die or on the cutting table.
In order to dislodge clay which may tend to plug up and close the orifices by
which the lubricant is admitted to the mouthpiece a a force pumpfis employed.
This pump is fitted on or to a second tank g containing oil and adjoining the tank c.
The suction pipe of the pump extends into the oil in the tank 9 and the delivery
pipe into the tank c, so that by working the pump handle i accordingly, the oil
is forced against the obstructing clay which is in this manner dislodged.
و
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 pug mill, lubricating the stream of clay as it passes through the mouth-
piece of the mill and before it enters the die.
2. Apparatus for supplying oil or other liquid lubricant to the mouthpiece of a
pug mill; consisting of a tank such as c charged with the lubricant and condensed
steam or water; a pipe such as b, with stop cock 61, for delivering the lubricant to
the mouthpiece; a steam pipe such as d, with cock d', for supplying steam to the
tank containing the lubricant; arranged substantially as hereinbefore described
with reference to the accompanying drawings.
Dated this 9th day of May 1893.
NICHOLAS WATTS,
Chartered Patent Agent.