IMPROVEMENTS IN APPARATUS FOR MIXING CONCRETE
Year: 1882

page_text: LETTERS PATENT to Andrew Jamieson, of Blantyre, in the County of Lanark,
North Britain, Engineer, for an Invention of "IMPROVEMENTS IN APPARATUS
FOR MIXING CONCRETE."
PROVISIONAL SPECIFICATION left by the said Andrew Jamieson at the
Office of the Commissioners of Patents on the 24th February 1882.
ANDREW JAMIESON, of Blantyre, in the County of Lanark, North Britain,
Engineer. "IMPROVEMENTS IN APPARATUS FOR MIXING CONCRETE."
This Invention has for its object to improve the construction and action of
apparatus for mixing concrete, so that the materials may be thoroughly mixed in an
expeditious and continuous manner.
The improved apparatus comprises a hopper to receive the materials for
composing the concrete, this hopper communicating with a stationary box which is
at the entrance end of a cylinder or barrel; and this cylinder or barrel which is
horizontal or more or less inclined is made to rotate and has passing through it a
shaft armed with helical or scrow blades. The cylinder and the bladed shaft are
by suitable gearing made to rotate in opposite directions and their joint action
produces the complete intermixture of the materials and at the same time causes
them to move along the cylinder so as to be delivered from the open end thereof
in a finished state and in a continuous manner.
The stationary box is formed with a cylindrical spigot-like rim to enter the end
of the rotating cylinder or barrel the joint surfaces between the two being made
conical or cylindrical, whilst a check ring or step may be formed or fixed inside the
cylinder or barrel to bear against the rim of the stationary box.-The cylinder or
barrel is supported on rollers being formed with belts-to rest on the rollers, and
these belts and the supporting rollers are by preference made conical so as to tend
to keep the cylinder or barrel close up to the stationary box. The internal surface
of the cylinder or barrel may be made cylindrical or polygonal or ribbed, the
polygonal or ribbed forms being intended to insure the more complete turning over
of the materials by the rotation of the barrel.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Andrew Jamieson in the Great Seal Patent Office on the 22nd
August 1882.
ANDREW JAMIESON, of Blantyre, in the County of Lanark, North Britain,
Engineer. " IMPROVEMENTS IN APPARATTUS FOR MIXING CONCRETE."
My said Invention has for its object to improve the construction and action of
apparatus for mixing concrete, so that the materials may be thoroughly mixed in an
expeditious and continuous manner.
My improved apparatus comprises a hopper to receive the materials for
composing the concrete; this hopper communicating with a stationary feed box,
which is at the ontrance end of a long cylinder, barrel, or box; and this cylinder,
barrel, or box, which is horizontal or more or less inclined is made to rotate and
has passing through it a shaft armed with helical or screw blades. The materials
are delivered at the further end of the cylinder, barrel, or box after being
thoroughly intermixed. The internal surface of the cylinder, barrel, or box may
be made cylindrical, polygonal, or ribbed, the polygonal or ribbed forms being
intended to insure the more complete turning over of the materials by the rotation
of the barrel.
And in order that my said Invention and the manner of performing the same
may be properly understood I hereunto append two sheets of explanatory drawings
to be hereinafter referred to and representing a modification of my improved
apparatus.
Figure 1, of the accompanying drawings is a sectional side elevation and
figure, 2, is an end elevation. In these drawings the same reference numerals are
used to mark the same or like parts wherever they are repeated.
In the drawings my improved machine is shown in a portable form being carried
on a strong wooden frame, 3, which is mounted on wheels, 4. At the entering end
of the machine there is a stationary feed box, 5, which is square in transverse
vertical section, and which has fixed on the top of it a hopper, 6, to receive the
materials which are to form the concrete. The stationary feed box, 5, is at the
entering end of a barrel, 7, which, in the example shown in the drawings is for the
most part square in transverse vertical section and is placed horizontally. The
barrel, 7, is made to rotate and has passing through it a shaft, 8, armed with helical
or screw blades, 9, and which shaft is made to rotate in an opposite direction to
that of the rotation of the barrel, 7. The first-motion shaft of the machine is a
transverse horizontal shaft, 10, carried in bearings, 11, at the back end of the
A bevil
machine and having on it fast and loose pulleys, 12, for a driving belt.
pinion, 13, on one end of the shaft, 10, gears with a bevil wheel, 14, on a shaft, 15,
at one side of the machine; and a pinion on the side shaft, 15, gears with a ring, 16,
of spur teeth formed or fixed on the barrel, 7, at its entering end. Another
pinion, 17, on the shaft, 10, gears with a bevil wheel 18, on the shaft, 8, which
passes along the axis of the barrel, 7, this shaft, 8, being carried in one bearing in
the end of the box, 5, and in another bearing, 19, which is beyond the open delivery
end, 20, of the barrel, 7. The joint action of the bladed shaft, 8, and of the
barrel, 7, rotating in opposite directions produces the complete intermixture of the
materials and at the same time causes them to move along the barrel, 7, so as to
be delivered from the open end, 20, thereof in a finished state and in a continuous
manner.
The stationary feed box, 5, is formed with a cylindrical spigot-like rim, 21, to
enter the end, 22, of the barrel, 7, the joint surfaces between the two being made

page_text: conical as shown, or cylindrical, whilst a check ring or step, 23, may be formed or
fixed inside the barrel to bear against the rim, 21, of the stationary box. The
barrel, 7, is supported on rollers, 24, being formed with belts, 25, to rest on these
rollers; and these belts, 25, and the rollera, 24, are by preference made conical
as shown so as to tend to keep the barrel, 7, close up to the stationary feed
box, 5.
Having thus particularly described my said Invention and the manner of
performing the same I have to state that I do not restrict myself to the precise
details herein described or delineated but that what I believe to be novel and
original and claim as the Invention secured to me by and in terms of the herein-
before in part recited Letters Patent is
1. The improved combination of parts constituting a machine for mixing concrete
and hereinbefore described.
2. The combination of a rotating cylinder, barrel, or box, with a central bladed
shaft rotating in the opposite direction, the said cylinder, barrel, or box being
connected at one end to a stationary feed box and being supported on rollers, and
the parts being arranged and operating substantially as hereinbefore described.
In witness, whereof, I, the said Andrew Jamieson have hereunto set my
hand and seal this twenty-first day of August in the year of our Lord One
thousand eight hundred and eighty-two.
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
}
ANDREW JAMIESON. (L.S.)