Improvements in Apparatus for Mixing the Materials used in the Manufacture of Artificial Stone, Concrete, and the like.
Year: 1889

page_text: Date of Application, 4th July, 1889
Complete Specification Left, 6th Mar., 1890-Accepted, 12th Aor., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Mixing the Materials used in the
Manufacture of Artificial Stone, Concrete, and the like.
We JOHN BRUNTON of 13 Victoria Street in the City of Westminster Civil Engineer
and LEWIS GRIFFITHS of Park House Millwall in the County of Middlesex Artificial
Stone Maker do hereby declare the nature of this Invention to be as follows:-
This Invention relates to apparatus to be used for mixing the materials employed in
the manufacture of artificial stone concrete and the like and has for its object to provide
a simple efficient durable and cheap apparatus which operates in a continuous manner
and wherein every motion of the machine does some useful work, the sticking of the
material within the mixer is avoided easy discharge obtained and the water is intro-
duced while the mixer revolves.
The machine constructed according to this Invention consists of two or more series
of rotary rakes attached to a vertical shaft driven by any suitable gearing the said
rakes revolving in stationary pans placed over each other a clearing bar or scraper
being provided in connection with each series of rakes for removing the material from
the pans when sufficiently mixed the pans being fed by a revolving flexible ladder or
elevator with buckets attached the machine measuring mixing and discharging itself
continuously.
When the machine is put in motion the elevator discharges the ingredients in proper
proportions into an inclined hopper from which they pass into the upper pan or first
mixer where the ingredients are thoroughly incorporated together in a dry condition
and when this is done a sliding door in the bottom of the pan is opened and by the
scraper the material is discharged into the lower pan where through a spray tap the
solution or water which is to be added to the ingredients is admitted. The dry
material is fed into the upper pan whilst its previous charge is being treated in the
lower pan so that dry and wet processos of mixing proceed simultaneously ensuring a
continuous supply to the moulding machines. When sufficiently mixed in the lower
pan a sliding door therein is opened the material is discharged through a shoot or
hopper into the slab mould or pipe mould or other receiver. The flow of material
through the shoot is regulated by a slide therein.
The scrapers may be mounted on the rakes so that they can be slidden into position
for use and out of the discharging position until the mixing is completed.
The composition is very thoroughly mixed, the discharge is simple complete and
effective and at the same time the cost of mixing and placing in position is considerably
reduced.
It is obvious that this machine by being placed on wheels is adapted for and may be
used with advantage in the mixing of concrete or the like on engineering works
generally.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.

page_text: COMPLETE
SPECIFICATION..
Improvements in Apparatus for Mixing the Materials used in the
Manufacture of Artificial Stone, Concrete, and the like.
We JOHN BRUNTON of 13 Victoria Street in the City of Westminster Civil Engineer
and LEWIS GRIFFITHS of Park House Millwall in the County of Middlesex Artificial
Stone Maker 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 apparatus to be used for mixing the materials employed in
the manufacture of artificial stone concrete and the like and has for its object to provide
a simple efficient durable and cheap apparatus which operates in a continuous manner
and wherein every motion of the machine does some useful work the sticking of the
material within the mixer is avoided easy discharge obtained and the water is intro-
duced whilst the mixer operates.
The machine constructed according to this Invention consists of two or more series
of rotary rakes attached to a vertical shaft driven by any suitable gearing the said
rakes operating in stationary pans placed one above the other a clearing bar or scraper
or clearing bars or scrapers being provided in connection with each series of rakes
for the purpose of removing the material from the pans when sufficiently mixed the
pans being fed by an endless ladder or elevator with buckets attached the machine
measuring the materials to be operated upon, mixing them and then discharging them
continuously.
When the machine is in operation the elevator takes up the materials or ingredients
and discharges them in proper quantities into a hopper or shoot by which they are
directed into the upper pan or first mixer where the ingredients are thoroughly
incorporated together in a dry condition and when this is done a passage in the
bottom of the pan is opened and the scraper or scrapers operated to eject the materials
therethrough into the pan beneath whereinto the water or solution which is to be added
to the ingredients is admitted and the whole is stirred up together by the operation
of the stirrers in this pan.. When the materials are sufficiently mixed in this lower
pan a passage in the bottom thereof is opened and the materials are by the scraper
or scrapers therein discharged into a shoot or hopper or shoots or hoppers to any
desired place such for instance as into a slab mould, pipe mould or other receiver. The
flow of the materials through the shoot or shoots may be regulated by a slide therein.
Dry materials are elevated by the elevator and discharged into the upper pan whilst
its previous charge is being treated in the pan beneath so that the dry and wet mixing
operations proceed simultaneously so ensuring a continuous supply of the mixed
materials to the moulds or other place. There may be any desired number of the
pans with rakes and scrapers for each and means for discharging from one pan to
the next beneath and one or more may be used for dry mixing and one or more for
wet mixing as desired.
The scrapers may be mounted on the rakes so that they can be slidden out of the
discharging position until the mixing is completed and then be slidden down into
position for discharging the materials from the pan.
The ingredients are very thoroughly mixed the discharge is simple complete
and effective and the cost of mixing and placing in position are considerably
reduced.
The machine may be placed on wheels and so be adapted for use in the mixing
of concrete or the like on engineering works generally.
And in order that this Invention may be well understood we will describe with
reference to the accompanying Drawing a machine made according to this Invention.
Figures 1 and 2 being sectional elevations at right angles to each other and Figure 3
being a plan.
The framing A supports castings B in which are held the annular pans C having
at bottom openings c which can be covered and uncovered by the slides or doors c³.

page_text: We have shewn two pans which will be sufficient to explain our Invention it being
understood that more than two may be used if desired. D is a vertical shaft mounted
in bearings d and driven by the gear wheels d2 and the latter upon the horizontal
shaft E provided with fast and loose pulleys e³ e driven from any suitable motor.
Upon the shaft D are mounted the rakes F the teeth of which are constituted by
the bars passing through holes in the arms of the rakes and secured by cotters
for ready removal. Upon these bars fare mounted scrapers G the said bars passing
between guides or through holes in the scrapers so that they can be slidden up or
down on the bars and be held in their raised position by a book fixed upon the arms
of the rake.
On the shaft E are the pulleys H H over which pass the endless bands I carrying
buckets i the lower ends of the said bands passing over pulleys J on the shaft j
mounted in bearings in the standards. The screws are for the purpose of
adjusting the length of the belts carrying the buckets by lowering or raising the
plummer blocks of the shaft j.
The materials to be mixed are placed in the pit K and are carried up by the
buckets and discharged into the hopper or shoot L the casings M confining the
materials to their proper course. The materials pass from the hopper into the upper
pan C where they are mixed in a dry condition and then on the slide or door c²
being moved so as to uncover the opening in the bottom of the upper pan and
the scraper G being lowered the materials are discharged into the pan beneath to
which water or any solution which is to be added is admitted by the pipe 1 and
tap which may be a spray tap. When the materials are thoroughly mixed the
door or slide c² which covers the opening in the bottom of the lower pan is opened
and the mixed materials pass from the shoots n to the moulding machine or other
place. Whilst the materials are being mixed in the lower pan the fresh charge of
dry materials is being mixed in the upper pan. The pans may be used either or
both of them for mixing the materials dry or wet and each pan may be provided
with an inlet for liquid if desired to be opened and closed in accordance to whether
the pan is to be used for dry or wet mixing.
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. The arrangement and combination of parts constituting the mixing apparatus
substantially
hereinbefore described and illustrated in the accompanying
drawings.
as
2. In mixing apparatus scrapers arranged in combination with stirrers or rakes so
that the said scrapers can be moved into or out of their operative position substantially
as hereinbefore described.
3. The combination with the mixing pans and stirrers or rakes and means for dis-
charging the materials from the pans of an elevator or elevators so that the process
of mixing can be carried on continuously substantially as hereinbefore described.
Dated the 5th day of March 1890.
J. H. JOHNSON & CO.,
Agents.