Improvements in Concrete Mixing Machines.
Year: 1891

page_text: Date of Application, 27th Feb., 1891
Complete Specification Left, 25th Nov., 1891-Accepted, 16th Jan., 1892
PROVISIONAL SPECIFICATION.
Improvements in Concrete Mixing Machines.
A communication from abroad by WRIGHT STEPHEN HOTCHKINS, of Wichita, in
the State of Kansas, United States of America, Mechanic.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool, and 6 Bank Street,
Manchester, both in the County of Lancaster & 323, High Holborn in the
County of Middlesex, Civil Engineer do hereby declare the nature of this invention
to be as follows:-
By the invention a portable frame is provided having elevators and hoppers for
holding the dry materials from which the concrete compound is made. Mixing
cylinders are used respectively provided with spiral Hanges, arms, and shaft
supported in an inclined position and arranged carrying said cylinders one in
advance of the other with their facing ends adjacent each other; a stationary
apron is used for conducting material from one cylinder to the other and suitable
means are adopted for rotating the cylinders one of which is of less diameter than
the other and arranged to receive the dry inaterials from the hoppers to dry mix
them and deliver them to the latter cylinder wherein they are subjected to a water
spray, wet mixed and delivered at the exit of said cylinder compounded for use.
The shaft aforesaid is supported centrally and at each end in suitable bearings and
the arms and spiral flanges of the cylinder are carried upon the forward end portion
of the shaft. The forward end of one of the mixing cylinders is adjacent to and
adapted to receive materials from the hoppers, the other cylinder is provided with
arms and flanged and carried upon the rear end portion of the shaft with its forward
end adjacent to and adapted to receive the materials from the first named mixing
cylinder; a stationary apron is arranged to conduct the materials from one cylinder
to the other, and another apron is also provided for catching and holding the
concrete compound as it is delivered from the latter mixing cylinder. The said
cylinders are supported in an inclined position by means of a single line shaft
through the medium of arms and adapted to rotate jointly with the shaft. Suitable
hoppers and the aforesaid elevators are provided respectively with discharge spouts
and reversible aprons at their upper part and gates at their lower part of hoppers
are centrally partitioned and provided with a discharge gateway and gate in each
compartment, the levers for operating said several gates and a chute connected with
each hopper discharge gateway and are arranged to conduct the materials there-
from to the dry mixing cylinder. The frame is provided with a pivoted forward
truck having a rear extending arm, and the rear vertical boxes of the rolls are
provided with boxes arranged to telescope said frame boxes.
Hand screws
are fixed in the frame and arranged to bear against said roll boxes. Drums
are fixed to the frame one of which is provided with a crank for rotating
it and a rope is arranged about the said drums and connects the extending
end of the arm of said forward truck. The spiral flanges of the wet mixing
cylinder terminate if desired with a greater degree of angle at their rear portion
than at the other portions of their length. It is proposed to employ a grading
drag or rake provided with supporting aud travelling carriages and connected to
advance with the machine. In conjunction with the hopper and gate levers rachet
racks, spring bars and gage stops may be employed.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.

page_text: Improvements in Concrete Mixing Machines.
A communication by WRIGHT STEPHEN HOTCHKINS, of Wichita, in the County
of Sedgwick, in the State of Kansas, United States of America, Mechanic..
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6, Lord Street, Liverpool and 6, Bank Street,
Manchester, both in the County of Lancaster and 323 High Holborn in the County
of Middlesex, 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:—
This invention relates to certain improvements in machines for mixing concrete,
such as are used when paving streets, placed as the foundation material upon which
asphalt or the like is placed, or for other similar purposes; and it consists essentially
in a portable frame carrying a pair of inclined rotary cylinders, elevators and
hoppers for conducting the different materials, which form the compound, to the
entrance of the cylinders; of a water pipe leading into and adapted to discharge
water into one of the cylinders; of a carrier for delivering the compounded
concrete upon the street; and of an engine and boiler for operating and propelling
the machine.
The object of this invention is to provide means whereby the different materials
used to make the concrete compound can be mixed on the street, at the place where
it is to be used, by mechanical energies, placing the separate materials in one end of
the machine, and, by the mechanical operation thereof, cause them to be thoroughly
mixed together, and delivered upon the street, thereby accomplishing more, more
evenly gauging the different.materials used, and more thoroughly mixing them than
can be done by physical strength at the same average expense.
Referring to the drawings:
Figure 1 is a perspective elevation of the machine, viewing it from one side,
showing it as it would appear in use upon a street;
Figure 2 a top plan view of the same;
Figure 3 a side plan of the drag rake thereof;
Figure 4 a front elevation of the machine;
Figure 5 a rear elevation of the same;
Figure 6 a bottom plan view of the machine-frame, showing the trucks and the
means for guiding the forward trucks;
Figure 7 a detail vertical longitudinal section at the forward part of the
machine;
Figure 8 a detailed view of a section of the hopper carrier mechanism;
Figure 9 a detailed top plan of the lower supporting posts of the carrier
mechanism;
Figure 10 a cross section of the forward end portion of the machine, on a line
between the upright hoppers thereof, looking toward the rear;
Figure 11 a detailed perspective of a section of the slatted carrier apron of the
swinging delivery carrier of the machine;
Figure 12 a detailed perspective view of a portion of one of the levers of the
machine for holding the lever when adjusted;
Figure 13 a cross sectional view of the stone hopper of the machine, an end view
of the bars therein and a side plan of the oscillating bars and pin thereof; and
Figure 14 a vertical longitudinal sectional view of the two cylinders and the
carrier of the machine:
Figure 15 is an enlarged view of the rotary valve intersecting the water supply
pipe.
Referring to these drawings-
Frepresents the machine frame adapted to support the several parts of the

page_text: machine, and provided with forward bolster A and the rear boxes 4,4, and is
supported off the ground in an inclined position by means of the truck-rolls R* R*
at the forward end, which are set in the boxes K³ upon which the frame bolster A
rests, the centre plates R acting as a pivoted bearing between the bolster and box
frame, and, at the rear part, by means of the rolls or broad faced wheels R R which
are set in the boxes 3 and 3 which boxes telescope with the boxes 4 4 vertically,
and are adjusted vertically in said boxes 4 4 respectively to adjust the incline of
the machine frame and its operative parts by means of the hand-screws S² S³,
which turn through the nuts N'N' (see Figure 5) which are set in the fixed
cross-plate 5, (see Figures 1 and 2) above said boxes, the screw being arranged to
turn against similar metallic capped plates across the upper part of boxes 3 3, as
shown.
To the rear part of the forward truck are secured two converging arms R³,
meeting at their outer ends, where they are secured together and serve as an arm.
by means of which the trucks are turned to guide the course of the machine.
Depending from the machine-frame and properly boxed to the frame opposite the
arm R, one at either side, is a pair of drums or broad-faced wheels, one of which
(shown at 6) is provided with a crank I extending above the frame, the opposite
one being shown at 7 (Fig. 6). L is a rope arranged across under the frame,
wound about each said drum, and secured at its end to arm R, and, by means of
which the said arm is moved sidewise by the turning of the drums (which will
cause the rope to travel) and thus guide the forward truck. A is a cross beam or
bar secured to a cross-beam of frame F as a means of support for arm Rs.
M M respectively represent an ordinary engine and boiler secured upon opposite
sides of frame F and serving as a means for providing power to operate and propel
the machine, the crank shaft of which engine is provided with a bevel gear P,
which meshes with a corresponding bevel gear P₁ on a counter shaft, which shaft
has a spur gear P2 which meshes with the annular gear P3 of the wet mixing drum
for driving the drums and the operating mechanism of the machine, and with a
winch W about which the rope R, (Fig. 2) for propelling the machine, is wound,
and the manner of propelling is as follows:-
The said rope is first paid out in advance of the machine and its advance end
secured to a stake, or to some fixed object, its opposite end is then passed between
the sheaves 14 (see Figures 4 and 6) which are secured to the under central part of
the box frame R³, from thence it is passed up over the sheaves 15 (see Figure 6)
to, and once or twice about the winch W and thence to one side of the frame
adjacent to the engine, where it is convenient to grasp, and when it is desired to
advance the machine said rope end is pulled, which tightens its grip on the winch
and winds the rope on from below and off from the side, thus causing the machine
to advance, and when advanced far enough the rope is slackened, which will cause
its grip on the winch to loosen, and the machine will stop.
D and D represent the two inclined mixing-cylinders of the machine respectively,
provided with the arms C and fixed on the shaft S as shown in Figs. 5 and 14, which
shaft is boxed at each end and centrally to the frame, the centre bearing being
supported by means of the metallic arched cross-beam through the agency of a
central hanger bearing m, (shown in Figures 1, and 2) and respectively provided
with the longitudinal spiral flanges F1 F2 fixed to their inner wall surface, as shown
in Figure 14. Cylinder D is less in diameter and shorter than its fellow cylinder,
and is arranged in advance for the purpose of receiving the several dry materials
which are used to make the concrete compound, thoroughly mix them together, and
deliver them in such condition mixed to cylinder D where the mixture is subjected
to a spray of water from the rotary valve Q' (shown in Figures 2 and 15) arranged
intersecting the water supply pipes Q, which valve consists of a cylindrical case
having a post on two opposite sides thereof, which posts are provided with annular
screw-threads into which the supply pipes are turned as shown; within this case is
arranged a rotary hub or head having fixed thereto the four radial wings as shown,
which are provided with suitable packing so that water may be retained by them

page_text: and they therefore have bearing against the walls of the case; extending from said
hub or rotary valve head is a shank or spindle upon which is fixed a wheel Q²
Fig. 2. which is arranged as bearing against the cylinder D, and by means of the
rotary action of said cylinders, said wheel is rotated by its frictional contact there-
with and the valve wings are therefore likewise rotated, and in use the water in the
supply pipes is under pressure, from some foreign source, and therefore as said
wings, rotate they permit the water to pass through the valve case thereof at a
speed in proportion to the speed of the rotary movement of the cylinder, and
hence by means of such valve the water spray supply is automatically regulated,
to at all times properly supply a quantity of water to wet the materials within
the wet mixing cylinder, and when the machine is not in operation the water
supply is checked or cut off by reasons of said valve wings remaining idle, and
during the passage of the mixture through cylinder D² it is thoroughly mixed
with the water, and thus formed into a concrete and delivered to the carrier
which is hereinafter described. Each of said cylinders is somewhat converged
at its forward end, as shown, respectively D D³ Fig. 14 for the purpose of
preventing material used in the mixture from dropping out at such places.
represents an apron arranged to support and direct the materials in their
proper course when passing from cylinder D to D², said apron g (see Figure 14)
is provided with both forward and rear depending screw thread arms; as shown
at g. Through corresponding holes in a cross beam T, below the apron and
upon each arm, are arranged two nuts, one above and one below the beam
flange, and, by adjusting said nuts, the apron may be so adjusted as to force
up its forward end and draw down-its rear side, both close to their respective
cylinder, and thereby practically close said aprons and avoid leakage.
In order to properly explain the further construction of the machine, it may
be stated that the materials commonly used to make the concrete compound, are
sand, cement and crushed rock, mixed together and saturated with water,
which materials it is preferred to use, and the usual way of using them is to dis-
tribute them along the centre and sides of the street and compound them as the
work of placing the concrete advances, which way it is preferred to adopt, and
shovel or otherwise place each material in its respective hopper as the demand
requires.
1 represents the stone hopper, and is of the general form and provided with a
gate Figs. 7 and 14 leading into lower portion of cylinder D and a series of
longitudinal slats in the hopper bottoms, and have arranged in them a corresponding
number of bars. 8 of a size to fill the slots, which bars are pivotally secured at their
lower end by sleeving on a fixed cross bar 9 and resting them on cross shaft 10
Figs. 1 and 7 at their upper end, which cross shaft is supported by means of
boxings secured to the hopper bottom This cross shaft is further provided with a
series of alternating pins 11 so arranged with relation to the bars 8 that, when the
shaft is oscillated one way, one set of pins consisting of each alternate pin throughout
the shaft, will engage each alternating bar and quickly raise said bar, so they will
extend up into the hopper as shown by dotted lines in Figure 7, and full lines in
Figure 13, and, by a reverse oscillating movement of the shaft, the reverse set of
pins. will engage the corresponding set of bars and likewise raise them, and thus,
by the oscillation of said shaft, the bars are caused to be operated and agitate. the
stone in the hopper in such manner as to cause the stone to freely and readily move
along into the-mixing cylinder D, and, as a means of oscillating said shaft, it is
provided with a crank arm 3, which is connected, through the agency of a con-
necting rod with a crank o of the elevator shaft v (see Figures 1 and 2).
The description of the delivery mechanism is as follows:-
d is a platform suspended below the discharge end of the wet mixture D' by
means of the hanger arms d', and a' is a centre stud fixed to said platform. B is
an endless carrier frame consisting of two side bars, preferably of metal and pro-
vided with intermediate cross. truss bars, as shown in Figure 2, and with, a
depending, socketed supporting frame a, which rests. in its socket against stud a¹,

page_text: and thereby supports the lower end of the carrier frame, fixed to the machine
frame is an arched standard S¹ which is provided with an upright stud 25,
centrally over the stud a', and arranged on this stud is a large bevel gear wheel G;
above said gear is a pivoted crosshead G also sleeved on said stud and supports at
one end by means of a short shaft boxed thereto, a bevel gear wheel Win mesh
with wheel G and beyond said gear a sprocket wheel W* and at its opposite end a
grooved travelling wheel W" which travels when the crosshead is rotated, or when
gear W is turned, upon an upright annular flange of the gear as shown in Figure 5.
The purpose of said wheel W being to relieve the stud 25 from excessive wear,
and the crosshead from excessive strain in holding the gears G and W into mesh,
sleeved on the stud 25 above the crosshead is a collar, having formed therewith or
attached thereto a pair of braces B' which extend forward and downward to, and
are secured to, the machine frame as a support to said stud and its standard, and
turned upon the screw threaded end of said stud is a nut n, which retains said parts
on the stud. Fixed to and leading down from the crosshead G¹ is a pair of rods B³
which are attached to and support the outer extending end of the carrier frame B,
and, as a means of giving rigidity to said rods, they are provided with cross
tie-bars, as shown in Figure 2, at each end of the carrier frame B is a cross shaft
upon which are fixed sprocket wheels, and about which wheels are arranged a pair
of opposite chain belts, and to these chain belts are attached the series of over-
lapping hollowed cross slats or plates B', as shown, which slats or plates form the
endless carrier apron, and upon which the compounded concrete is delivered from
the mixing cylinder and by means of which the said concrete is delivered upon the
street or other desired place, and by means of the pivoted supports of said carrier,
described, it is adapted to be turned or swung laterally in each direction as
indicated by the dotted lines in Figure 2, so that the concrete may be evenly
deposited upon all parts of the street where the machine is used, within the limits,
however, of the swinging limits of the carrier at the inner end of the carrier, a
fender or sideboard K Fig. 14 is provided for the purpose of preventing the con-
crete from being improperly delivered upon the carrier. As a means of driving
the carrier apron B, a shaft S is provided, suitably supported above the cylinder D²
by means of the standard boxes M2 and M³, Fig. 2 and, upon one end of the said
shaft, a spur gear P' Figures 1 and 2 is fixed in mesh with the annular gear P³ of
said cylinder, and upon the opposite end of said shaft a bevel wheel G³ is provided
in mesh with wheel G, and on the extending end of the cross shaft at the outer
end of the carrier frame B, a sprocket wheel W³ is provided in gear, by means of
the sprocket chain C² with the sprocket wheel W of the cross shaft G, and these,
through the agency of said gears when the cylinder D2 is rotated said endless
carrier apron B will be likewise operated.
O and O¹ represent respectively the cement and sand primary hoppers into
which said materials are first placed, and 02 and 0³ represent respectively the
hoppers above the mixing cylinder D into which said materials are elevated, from
the primary hoppers by means of the clevators H. and H', which hoppers O2 and O³
are supported in the manner shown in Figures 1 and 14, and, as a means of
gathering the materials in the hoppers O and O¹, such materials may be taken by
the elevators mechanism. The screw conveyors Y and Y are provided in each
hopper fixed on a common shaft, which is suitably boxed and provided with a
chain wheel and driven through the agency of a chain belt Y2 from a similar wheel
of the lower elevator shaft, as shown. The hoppers (2 and 03 are so arranged
that a space or chamber is made between them, which chamber terminates at its
lower end with a shute N¹ (see Figure 7) which leads into the dry mixing cylinder D
and each hopper is provided with a gateway, as shown at f¹ (see Figure 14)
which gateways lead into the intermediate chamber, so that delivery from the
hopper will be into said chamber and from thence jointly from the shute N into
..the mixing cylinder D. Said gates 2 and 3 are respectively provided with the
operating levers .cc arranged extending to one side through slots in plates K',
Fig. 4 which slots are provided with a series of ratchet teeth or racks as shown

page_text: at 1, Figure 12, and it is intended that each slot shall be provided with a side
spring rod, as shown at I for yieldingly holding the lever shown at X³, engaged
with the ratchets, and also that adjustable gauges, such as shown at 1, be used
with each lever to act as a stop to arrest the movement of the levers, so that,
when once set to properly open the gates, no further attention is required when
closing and again when opening the gates, as the lever will be arrested by the stops
when properly adjusted to open the gates to such width or height as required to
permit the passage of the proper quantity of each material.
In the bottom of the hoppers O2 and 0³ are provided, for the purpose of causing an
even and steady delivery of the materials from said hoppers to cylinder D, the endless
carriers shown at JJ (Figures 7 and 14) one in each hopper, which carriers consist
of a chain belt carrying a series of plates or slats, as shown in Figure 8, the chains
of which are arranged on sprocket wheels, so that they may be operated to traverse
the bottom of the hoppers and carry on their plates the material contained in the
hopper through the gateways thereof and deposit them in said cylinder D; and
during such delivery of the carriers, the sliding gates, shown at ff of the
gateways are adjusted to act as striker off for each hopper to regulate the
quantity of material delivered by each carrier said carriers are operated by their
inner wheels, which are respectively fixed on the cross shafts and shown in
Figure 10, the upper one of said shafts being driven from the upper elevator
shaft o by means of a chain belt arranged operating one corresponding chain wheels
of said shaft, and the lever shaft being driven through the agency of the spur
gear which are fixed on said shafts and arranged in mesh as shown in
Figure 10.
To prevent the elevator belt J* from slipping, the belt tight near mechanism,
shown in Figure 5, has been provided, consisting of a frame J fixed to the machine
frame and a sliding frame J at one side in a recess in frame J and at its opposite
side in a corresponding recess in one of the posts of the machine and within the
frame a shaft is fixed, upon which is an idler pulley bearing against the belt J,
and, as a means of bringing said pulley band to bear against the belt, the said
sliding frame J has been provided with an extending screw threaded arm X³,
which is arranged through a corresponding hole of a post of the machine and a
nut is turned upon said arm, and, by tightening the nut, the frame J may be
moved, and thereby the bearing of the idler pulley against the helt J' regulated.
As a means of strengthening the frame, a pair of truss rods, as shown at 2
and 2, Figure 6, is used extending under the centre cross beam and secured to
the end beams.
As a means of levelling the concrete on the street, as shown in the rear of the
machine (see Figure 1), a drag-rake 12 is attached to the machine through the
medium of the eye straps 13 and connecting rods 14 (see Figure 2) which rake
consists of a long curved beam (see Figure 3) supplied with a series of teeth 15
held by a series of wedges 16 and supported on the street curb by a carriage_con-
sisting of the attached adjustable head frame 18 and the two flanged wheels 17
thereof and at or near the centre of the street by a carriage consisting of the
frame 19 clipped to the beam and thereby rendered adjustable longitudinally and
of the wheels 20 of the said frame.
The purpose of curving the rake-beam is to adapt it to the proper grade or
contour of the street, and, by means of holding the teeth 15 by the wedges, they
are adapted to be adjusted by loosening the wedges to adapt them to various con-
tours, the head frame 18 of the drag rake is slotted and adapted to be vertically
adjusted or may be reversed by reversing to accommodate different curbs.
By referring to Figure 14, it will be observed that the rear portions of the spiral
flanges F of cylinder D' terminate with a section of much greater degree of angle
than the remaining portions to move readily ejecting the concrete from the cylinder
so that it will not be carried too high at that place, but slide off the side sections
and not be caught by or interfere with the machine frame.
In places where an engine would be an objection as a means of rotating the

page_text: cylinders, a tram of gears, as shown at Y, Figure 5, with the gear Pand
operated by a pair of hand cranks shown at Y and Y may be used instead
of the engine.
As a means of rotating the flow of water in cylinder D², said cylinder has been
provided with a series of internal annular flanges F, as shown in Figure 14, which
form guards against which the water comes before it becomes thoroughly mixed
with the concrete materials.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is:
1. In a concrete mixing machine, the combination, with the portable frame F
provided with the elevators and the hoppers for holding the dry materials from
which the concrete compound is made, of the mixing cylinder D and D2 provided
respectively with the spiral flanges FF2 and arms of the shaft S supported in
an inclined position and arranged carrying said cylinders, one in advance of the
other, with their facing ends adjacent to each other, the adjustable apron for
conducting material from one cylinder to the other, and the incans described for
rotating the cylinders, wherein the former cylinder is of less diameter than the
other and arranged to receive the dry materials from the hoppers to dry-mix and
deliver them to the latter cylinder, wherein they are subjected to a water spray,
wet-mixed and delivered at the exit of said cylinder compounded for use, substan-
tially as set forth.
2. In the concrete mixing machine described, the combination, with the portable
frame F, provided with the elevators, the hoppers for holding the dry materials
from which the concrete compound is made and with the engine for operating the
elevators and mixing mechanism, of the shaft S supported separately and at each
end in suitable bearings, the cylinder D provided with the arms C, and spiral
flanges F carried upon the forward end portion of the shaft, with its forward end
adjacent to, and adapted to receive the materials from the hoppers, the cylinder D²
provided with the arms C and flanges F and F2 carried upon the rear end portion
of the shaft, with its forward end adjacent to and adapted to receive the materials
from cylinder D, the adjustable apron arranged to conduct the materials from one
cylinder to the other, and the carrier for catching and delivering the concrete
compound on the street, from the latter cylinder, substantially as and for the
purpose specified.
3. In the concrete mixing machine described, the combination, with the portable
frame F and the hoppers thereof for holding and delivering the dry materials from
which the concrete compound is made, of the cylinder D and D² supported in an
inclined position by means of a single shaft through the medium of the arms C, and
adapted to rotate jointly with the shaft, wherein the former cylinder is of less
diameter than the latter and adapted to receive, dry-mix the materials and deliver
them into the latter cylinder, wherein they are wet-mixed and delivered therefrom
compounded for use, substantially as set forth.
4. In the concrete mixing machine described, the combination, with the hoppers ()
and O' and the elevators H and H respectively provided with discharge spouts and
gates at their lower part, of the hoppers O2 and 0³ provided with discharge gate-
ways, the levers for operating said several gates, and the shute n' communicating
with each hopper discharge gateway, and the carriers to conduct the materials
therefrom to the dry-mixing cylinder, substantially as set forth.
5. In the concrete mixing machine described, the combination of the frame F
provided with pivoted forward truck having the rear extending arms R³ and with
the rear vertical boxes 4-4 of the rolls R provided with the boxes 3 arranged
telescoping said boxes 4-4, the hand screw S2 fixed in the frame and arranged bearing
against said roll-boxes, the drums 6 and 7 boxed to the frame, one of which is
provided with a crank for rotating it and the rope L arranged about said drums

page_text: and connecting the extending end or the arm of said truck, substantially as and for
the purpose specified.
6. In the concrete mixing machine described, the wet-mixing cylinder D³ thereof
provided with the spiral flanges F terminating with a greater degree of angle at
their rear portion than at other portions of their length, and with the annular
flanges F, substantially as and for the purpose specified.
7. In combination with a portable concrete mixing machine described, a grading
drag or rake provided with supporting and travelling carriages and connected to
advance with the machine, substantially as and for the purpose specified.
8. In the concrete mixing machine described, the combination, with the hopper
and elevator gate operating levers, of the ratchet racks or teeth, the spring bars,
and the gauge stops thereof, constructed and arranged, substantially as and for the
purpose specified.
9. In the concrete mixing machine described, the combination, with the mixing
cylinder, of the swinging endless carrier deliverer, pivotally stepped below the
delivery end of the mixing cylinders and supported at its extending end by means
of rods pivotally connected to the machine above the said cylinder, and of the
gearing mechanism for operating the said carrier, substantially as and for the
purpose set forth.
10. In the concrete mixer described, the combination, with the cylinder provided
with the annular spur gear, and with the swinging endless carrier, of the shaft boxed
longitudinally above the cylinder and provided with the gears P and G2 of the
arched standard S₁ arranged over the cylinder and provided with an upright stud,
of the gear wheel carried by the cross head arranged upon said stud, of the
travelling wheel also carried by said cross head, of the bevel gear wheel arranged
on said stud in mesh with the former adjacent gears, and of the sprocket wheels
and chain belts, whereby the endless carrier is driven by means of the rotary
movement of the cylinder through the agency of said gearing mechanism, substan-
tially as set forth.
11. In the concrete mixer described, the swinging delivery carrier, consisting of
the combination of the side bars, and provided with the cross shafts and wheels at
their ends, and trussed by means of the cross braces, as shown, of the sprocket
chains arranged about said wheels, and of the overlapping slats or plates fixed to
said chains, substantially as set forth.
12. In the concrete mixing machine described, the combination, with the wet-
mixing cylinder, of the swinging endless carrier pivotally stepped at one end below
the discharge end of cylinder, and supported at its outer end by means of swinging
hangers, substantially as set forth.
13. In the concrete mixing machine described, the combination, with the
hoppers 003 respectively provided with the vertically adjustable gates as set
forth, of the endless carrier arranged operating in the bottom of said hoppers for
the purpose of delivering materials therefrom, substantially as specified.
14. In the concrete mixing machine described, the combination, with the
hoppers O O³ of the endless chain carriers arranged operating in the bottom of
said hoppers for conveying material from the hoppers, and of the vertically
adjustable gates of the hoppers for regulating the quantity of the material conveyed,
by means of acting as strikers-off, substantially as specified.
15. In the concrete mixing machine described, the combination, with the
hoppers 02 03 of the endless carriers operating in the bottom of said hoppers, and
arranged at one end, about idler wheels, and at their opposite end about driven
wheels of the cross-shafts, hh, which are arranged supporting and operating said
driven wheels, and geared together to operate jointly, and of the means of driving
said shafts, substantially as and for the purpose set forth.
16. In the concrete mixing machine described, the combination, with the hopper E
provided with the series of longitudinal slots as specified, and the series of bars
arranged in said slots, pivotally. secured at their lower end and arranged resting

page_text: upon a cross shaft at their upper end, and of the series of alternating pins fixed in
said shaft adapted to engage and vibrate said bars, when said shaft is oscillated,
substantially as and for the purpose set forth.
17. In combination with the hopper E, provided with the series of longitudinally
arranged slots, of the series of bars arranged in said slots and adapted to be
vibrated, for the purpose of facilitating the delivery of the material from the
hopper, by means of oscillating pins, arranged alternately engaging said bars,
substantially as specified.
18. In the concrete mixing machine described, in combination with the mixing
cylinders, the apron for conducting the materials from one cylinder to the other,
provided with the depending screw thread arms arranged through corresponding
holes of flanges of a cross beam below said apron, and the nuts for adjusting and
holding said apron, substantially as set forth.
19. In the concrete mixing machine described, the combination, in the water
spray or supply mechanism for wetting the materials in the wet-mixing cylinder,
of the rotary supply valve arranged intersecting the water supply pipe and operated
to regulate the How of water into the cylinder, by means of the rotary action of the
cylinders in the manner substantially as set forth.
Dated this 24th day of November 1891.
WM. P. THOMPSON & Co.,
Agents for the Applicant.