Year: 1886

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I, HENRY FAIJA of 4 Great Queen Street, Westminster, Civil Engineer, do hereby
declare the nature of this invention to be as follows:-
The object of my invention is to enable concrete to be conveniently and
thoroughly mixed. For this purpose, in lieu of causing the materials to be fed
in a continuous manner to the mixing apparatus and the product or mixed
concrete to pass therefrom also in a continuous manner, as at present usually
practised, I arrange apparatus so that a certain quantity of each material is fed
into the mixing vessel, the mixture of the materials is therein effected and then
the mixed concrete is discharged preparatory to the introduction into the vessel of
fresh supplies of material to be mixed and discharged and so on.
To this end, the mixing pan or bottom of the mixing vessel is so constructed and
arranged that it can be readily tilted in such a manner as to discharge the concrete
from the mixing vessel. For the purpose of effecting thorough admixture in that
vessel, a stirrer or stirrers is or are employed to which rotary motion is imparted
about the axis or axes of such stirrer or stirrers and in addition to this rotary
motion, each stirrer is caused to travel in a circular path about the axis of the
mixing vessel. The movement in a circular path is in the contrary direction to the
rotation about the axis of the stirrer. Such compound movement of a stirrer às
above referred to can be conveniently produced by mounting the shaft or spindle
carrying the stirrer in an arm or frame which is carried by a central shaft suitably
driven so that the arm or frame is caused to travel round about the axis of the
mixing vessel. Concentric with that axis is an internally toothed ring or fixed
wheel, into the teeth of which gears a pinion fixed on the shaft or spindle of the
stirrer.
In order that the blades of the stirrer shall occupy different positions at a given
point in successive revolutions about the axis of the mixing vessel, the ring or
fixed wheel is provided with a number of teeth indivisible by the number of teeth
in the pinion.
86.
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: I, HENRY FAIJA, of 4 Great Queen Street, Westminster, Civil 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:-
The object of my invention is to enable concrete to be conveniently and
thoroughly mixed. For this purpose in lieu of causing the material to be fed
in a continuous manner to the mixing apparatus and the product or mixed
concrete to pass therefrom also in a continuous manner, as at present usually
practised, I arrange apparatus so that a certain quantity of each material is fed
into the mixing vessel, the mixture of the materials is therein effected and then
the mixed concrete is discharged preparatory to the introduction into the vessel of
fresh supplies of material to be mixed and discharged and so on.
.
Referring to the accompanying illustrative drawings Fig. 1 is a central vertical
Bection of apparatus according to my invention. Fig. 2 is a top plan with bevel
driving gear omitted. Fig. 3 is a plan on line A B of Fig. 1. Fig. 4 is a plan on
line CD. of Fig. 1.
The mixing pan or bottom of the mixing vessel is so constructed and arranged
that it can be readily tilted in such a manner as to discharge the concrete from the
mixing vessel. b is the bottom of the mixing vessel a; it is pivotted at c, c.d is a
shaft mounted in the side frames e; it carries arms ff, with anti-friction wheels g ġ,
which in the arrangement illustrated are mounted on a shaft h.-Whilst mixing is
taking place, the bottom 6 is supported in its normal position as shewn in Fig. 1,
by the arms f. f. which are held up by means of a lever handle i, secured in any
suitable way it may be by a spring catch k as shewn. On the shaft d is fixed a
lever arm that carries a counterbalance weight m which helps to counterbalance
the weight of the bottom 6 resting upon the arms f. f. To discharge mixed
material the bottom b is allowed to assume a convenient tilted attitude, for
example as indicated by dotted lines in Fig. 1, which it does automatically on
the lever handle i being released. In practice I find it often advantageous to place
the mixing pan at such an elevation that when the bottom 6 is tilted it may
discharge the mixed material direct into a barrow or other vehicle for its
convenient removal, or the machine may be arranged in a portable form with
wheels running on a tramway or otherwise, and thus be made to deliver each mix
in the exact position required. For the purpose of effecting thorough admixture in
the vessel a a stirrer or stirrers is or are employed to which rotary motion is
imparted about the axis or axes of such stirrer or stirrers and in addition to this
rotary motion each stirrer is caused to travel in a circular path about the axis of
<the mixing vessel. The movement in a circular path is in the contrary direction to
the rotation about the axis of the stirrer. In the example illustrated there are
two sets of stirrers, each comprising four arms or blades, namely, n¹, n³, n³, nª,
and o¹, 0, 0, 0%. The compound movement of these stirrers as above referred to
is produced by mounting the shaft or spindle carrying each set of stirrers in an
arm or frame. These are marked respectively p and q. They are fixed to a central

page_text: shaft suitably driven. In the drawing a shaft 8 is shewn with fast and loose
pulleys t, and bevel gear u ul. When the apparatus is in operation the arms p
and g are caused to travel round about the axis of the mixing vessel a. Concentric
with that axis is an internally toothed ring or fixed wheel into the teeth of
which gear two pinions w, w', one fixed on the shaft or spindle of each set of
stirrers. The distance of the stirrers above the bottom and their length are
determined by the size of aggregate which it is intended to treat in order that
clearance may be secured. In order that the blades of the stirrers shall occupy
different positions at a given point in successive revolutious about the axis of
the mixing vessel, the ring or fixed wheel is provided with a number of teeth
indivisible by the number of teeth in the pinion.
Having described the nature of the said Invention and in what manner the same
is to be performed, I declare that what I claim is:-
Apparatus substantially as described and shewn for mixing concrete.
Dated this 17th day of November 1886.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.