System of Apparatus for Treating Garbage.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
System of Apparatus for Treating Garbage.
I, GEORGE ELLSWORTH GALE, residing at No. 52, Halstead Street, East Orange,
County of Essex, State of New Jersey, U.S.A., Gentleman, do hereby declare the
nature of this invention to be as follows:-
The object of the present invention is to furnish an apparatus in which garbage
and similar materials may be cooked, pressed and dried, and the greaso and
fertilizing agents recovered from the material without discharging any noxious
gases, or exposing the material to the atmosphere at any stage of the process.
To effect this object, the material is cooked in a rendering tank and the grease
drawn from its upper surface at the close of the cooking operation. The residue
is then discharged into a press-curb and the water pressed therefrom by a piston,
and the tank liquor drawn off. The material is then delivered into a drying
cylinder where it is heated and agitated until all the volatile elements are separated;
and the final product is then adapted for transportation and use, in a dry condition,
as a fertilizer.
To prevent the discharge of any noxious gases or the exposure of the material
during these successive steps of the treatment, the rendering tank, the press-curb
and the drying cylinder are made air-tight, and connected by air-tight pipes and
valves, and vacuum pipes are extended separately to those receptacles to draw off
the gases and vapors generated therein.
The material can be pressed and dried in one quarter of the time which is
required for cooking or rendering, and I therefore prefer to connect a series of
rendering tanks, as three or four, with the press-curb, arranging them over the
same so that their contents may be successively discharged to the curb by
gravity.
In such an arrangement, the tanks would all be rendered useless if either the
drying cylinder or the press-curb were disabled; and my invention also includes an
alternative arrangement to obviate such a result.
In such alternative arrangement, I connect a large serios of the rendering tanks,
as eight, ten or twelve, with two or more press-curbs, each of which is arranged to
discharge into a separate drying cylinder.
The series of tauks are, in such case, arranged in a row over a conveyor box,
and the box is also connected with the two press-curbs, and suitable gates and
valves are provided so that the contents of any of the rendering tanks may be
discharged independently into the conveyor and delivered into either of the press-
curbs. The conveyor inay also be used as a storage box to hold the material from
any of the tanks when the cooking is completed, and the pressing may thus be
effected in the press-curb at periods of time independent of those at which the
rendering is concluded.
Such a construction is adapted for use in large cities, where great quantities of
the material are treated daily, and the construction enables such a large plant to
work without interruption during the repairs or cleaning of any one of its parts.

page_text: The gases drawn from the receptacles by the vacuum pipes may be condensed
or burned, and as none of such gases are discharged into the atmosphere, and none
of the material is exposed during the process of treatment, it is obvions that the
process is made entirely sanitary.
My invention also includes details of construction, in one of which the vertical
cylinder of the press-curb is made with an opening at the bottom of the full
diameter of the cylinder, and a tight gate chamber is extended laterally from the
bottom of the curb, and a horizontal gate is mounted upon rolls to close the bottom
of the cylinder during the pressing operation.
The top of the curve is made with a vertical air-tight hood, through the top of
which the rod of the pressing piston is extended into a hydraulic cylinder, around
which the rendering tanks are grouped, and in the sides of which hood the inlets
are formed to receive material from the different rendering tanks.
Each rendering tank is provided in the top with a valve opening inwardly, and a
floor is arranged at the tops of the tanks upon which the material is dumped to fill
the same, the valves being operated by handles extended above the floor.
The drying cylinder is formed with one or more outlets in the bottom, having
hinged covers actuated by worin gearing at the side of the cylinder, and a carrier
belt or apron is arranged beneath the cylinder to remove the material when
discharged therefrom.
Dated at New York, N. Y. the Fourth day of October, 1897.
I, GEORGE ELLSWORTH GALE, residing at No. 52, Halstead Street, East Orange
County of Essex, State of New Jersey, U.S.A., Gentleman, 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 present invention relates to an apparatus for pressing and drying the material
which may be cooked in a series of rendering tanks to secure the grease and
fertilizers in such material without discharging any of the noxious gases into the
atmosphere.
It requires much less time to press or to dry the material than to cook the same,
and it has therefore been common to press the material from several tanks in a single
press-curb; but an apparatus has never heretofore been devised in which the three
operations of rendering, pressing and drying could be performed successively upon
the same material without its exposure to the atmosphere, or the discharge of
noxious gases at any stage of the process.
In the present invention, the tanks, the press-curb, and the drier are tightly
closed, and connected by air-tight pipes and valves, each receptacle being, if desired,
connected with a vacuum pipe to draw off the vapors independently.
In the annexed drawing, Fig. 1 is a side elevation of the apparatus; Fig. 2 is an
end elevation of the same, with the body of the drying cylinder shown in section
near the inlet and one of the outlets, to show the mechanism for working the outlet
valve. Fig. 3 is a central section of the apparatus for operating the valve in the
top of one of the rendering tanks; Fig. 4 is a section of the piston and links in such
apparatus, upon line 4, 4, in Fig. 3; Fig. 5 represents in plan the under side of the

page_text: valve and its actuating mechanism, with a part of the tank-head; Fig 6 is a section
of the press-curb on line 6, 6, in Figs 8 and 9; Fig. 7 is a section on line 7, 7, in
Fig. 8; Fig. 9 is a plan of the press-curb gate with its chamber in section just
above the shifting screws, and the shell of the curb C represented in dotted lines.
Fig. 9 shows the gate itself inverted.
Fig. 10 is a plan of the rendering tanks and hydraulic press; Fig, 11 is a plan
of the apparatus taken in section on line 11, 11, in Fig. 2. Fig. 12 is a central
vertical section of one of the rendering tank valves; Fig, 13 is a cross section of
the same on line 13, 13, in Fig. 12; Fig. 14 is a cross section on line 14, 14, in
Fig. 12; and Fig. 15 is a plan of the valve detached from the piston. Fig. 16 is
an elevation, and Fig. 17 a plan of a battery of tanks connected with two press-
curbs.
The drawing represents apparatus of large size erected in a building provided
with floors A, A1, A2, A³.
Referring to Figs. 1 and 2, the drying cylinder B is supported upon the lower
floor A, and the press-curb C is arranged directly over the same and connected
therewith by gate-cising H¹. A hydraulic cylinder E is supported above the
press-curb, and four rendering tanks F are arranged around the hydraulic cylinder
and connected with a hood G upon the top of the press-curb by inclined pipes H
provided each with a horizontally sliding gate, of which the details are shown in
Figs. 11 and 12.
A suitable frame J is shown supporting the parts in the proper relation. The
floor A³ is arranged even with the tops of the rendering tanks, and the filling inlet
in the top of each is made flush with the floor, so that the material when hoisted to
such floor may be dumped thereon and shoveled directly into the tanks.
With this arrangement, the rendering tanks are filled successively at suitable
intervals, and the contents of each is discharged in succession to the press-curb,
where it is pressed, and the fluid drawn off. The material is then discharged from
the press-curb into the drying cylinder.
The time required for cooking the material is at least four times as long as that
required for pressing or drying the same and the single press-curb and drying
cylinder are therefore enabled to dry in succession the material rendered in the four
tanks F. Each rendering tank is provided in the top with a valve seat F¹, which
projects inwardly from the inlet and is formed with a projecting ring of yielding
packing f
The valve K is hinged to a pivot k at one side of the seat, and is actuated by a
plunger k¹ which is reciprocated by a screw k² in a vertical box at one end of the
pivot k. The valve is provided with an arm which is connected to the plunger
by links k, and the screw is journaled in a bearing k upon the top of the box ³,
and is provided with a hand-wheel 7. The bearing is provided with a packing
to prevent the escape of any gases. The links are pivoted to studs s which are
riveted in ears 1 (at opposite sides of the screw) upon the bottom of the plunger.
The valve is shown in dotted lines in its open position, with the plunger k¹ drawn
to the top of the box by the screw k². The downward movement of the plunger
operates to force the links downward within the box, and to push the arm and valve
into the position shown in full lines, thus forcing the valve against the packing f
upon the seat and tightly closing the inlet. The valve is formed with ears K4, and
the arm is jointed at its middle to the links so that when one end of the arm is
forced downward by the plunger and link 4, the other end of the arm may be
pressed toward the valve and force it directly toward the seat. A bolt K³ passed
through the inner end of the arm and the lugs K4, serves to open the valve
positively when the plunger is raised. Each valve casing H₁ is provided with a
flaring mouth-piece f¹ to fit a funnel F¹ upon the bottom of each tank.
The valve H2 is made of wedge-shape, to press upon the seat surrounding the
inlet f below the mouth-piece f, and the upper side of the valve is made with a
smooth face, to slip readily beneath the mass of heavy material in the rendering
tank, The under side is hollowed and ribbed, as shown in Fig. 15, and its edges

page_text: are made parallel with the movement of the valve, and are supported and guided
by a flat base-plate h¹, which is secured detachably upon the bottom of the casing
and provided with a tapering outlet h² fitted to the pipe H leading to the press-
curb. The valve outlet h² is larger upon its upper side than the inlet f², to prevent
the material from lodging within the casing as it passes through the outlet.
A screw H³ is journaled at one end of the casing to actuate the valve, and a
nut h³ is secured in the end of the valve in the usual manner, to fit the same. By
means of the flat base-plate h¹ and the fitting of the valve to slide thereon through
its whole range of movement, it is adequately supported beneath the heavy pressure
of the material in the rendering tank, which material crowds the valve downward
not only when it is closed but while it is being retracted.
The press-curb, as shown in Figs. 6 and 7, is formed of staves having numerous
slots u at their vertical joints to discharge the fluid pressed from the material, and
is surrounded by a water-tight jacket C¹ with manhole covers C2. A manhole is also
formed through the jacket and curb-cylinder and closed by a tight cover C² upon
the jacket, with a perforated section C³ held flush with the interior of the curb by
studs C. The curb and jacket are attached at the bottom to a rectangular plate c
which in turn is attached to a lower plate c¹ by a rectangular frame c² forming an
air-tight chamber within which a rectangular gate c³ is fitted movably. The gate,
like the valve H2, is made smooth upon the upper side and ribbed beneath, and is
provided at each edge with bottom rolls c which rests upon the plate c¹, and with
side rolls touching the side frame c². Openings of the same size as the curb-
cylinder are made through the plates c and c¹, and the gate c³ is made a littlo
larger than such opening, thus affording it contact with the lower end of the curb,
and a bearing for the rolls ct at opposite edges of such opening. The rectangular
frame is provided in one end with an inclined seats, and the adjacent edge of the
gate is provided with inclined lugs 8¹ arranged to contact with the seat when the
valve is closed, and to crowd the valve upward forcibly against the bottom of
the curb to close the curb tightly.
The screws 8 are shown journaled in the opposite end of the rectangular frame
and fitted to nuts n upon the gate. The screws are connected by gears ³ with a
shaft shaving a hand-wheel 85 and sprocket-wheel 80 fitted thereon to rotate the
screws by hand or by power.
A sheet metal funnel 2 is attached air-tight to the opening in the bottom of the
gate chamber, and a valve casing H', similar to those at the bottom of the rendering
tank, is attached to a flaring mouth-piece to the bottom of such funnel, and its
base-plate connected with the inlet B₁ of the drying cylinder. The press-curb is
thus provided at the bottom with both a gate and a valve, the former having the
full area of the curb-cylinder (at the bottom) to support the material during the
pressing operation; but not making an air-tight joint with the bottom of the curb,
which would be difficult to accomplish in a very large construction. As the
valve connected with the drying cylinder inlet B' is made wedge-shape, as illustrated
in Fig. 12, it may be forced tightly against its seat or against a packing f³, as shown
in Fig. 12, to confine the vapors and gases tightly to the drying cylinder during
the drying operation, which in practice amounts to a destructive distillation of the
material.
In gates for water mains, it is common to use a tapering or wedge-shaped valve;
but such valves are not supported upon one side throughout the whole range of
movement, as in the valves H2, which is supported upon the base-plato H¹ in my
construction. The valve seat containing the packing f³ (as shown in Fig. 12) is in
my construction inclined to the base-plate so that the valve may move parallel with
the base-plate, and also wedge against the seat in its forward movement.
The relation of the base-plate to the inclined seat, and the formation of the valve
with a plane surface upon the upper side adapts it especially to support a downwardly
pressing load of rough and heavy material, such as is operated upon in my
construction.

page_text: A piston with piston rod P¹ is shown in the press-curb in Fig. 7, and the rod is
shown in Fig. 2 extended through the top of the hood G into the hydraulic cylinder E,
where it would be attached to the piston upon which the water pressure operated.
A valve box d is shown connected with the opposite ends of the hydraulic cylinder
by pipes d', and provided with a supply pipe d2 and waste pipe d³.
The handle g of the valve is shown in Fig. 2 provided with a rod g¹ extended
upward by the side of the box ³ upon one of the rendering tanks. These boxes,
carrying the hand-wheels K2 upon the series of rendering tanks, are preferably
arranged, as shown in Fig. 10, upon the inner quarters of the rendering tanks so that
they may be readily roached by an operator standing between the same upon the
floor A³. The floor is omitted in Fig. 10, and as the boxes and the hand-wheels K'
are the only objects which project from the rendering tauks above the floor, it is
obvious that their arrangement in a central group permits the freest access to the
inlets of the rendering tanks from every side, thus permitting the garbage or other
material to be dumped upon the floor A³ and shoveled into the tanks without
obstruction from the valve closing mechanism; which can be readily actuated by a
single operator, as also the handle for governing the hydraulic piston and the
movement of the piston in the press-curb.
The cylinder B is shown in Fig. 1 provided with heads having stuffing-boxes b
through which a stirring-shaft B2 is extended, and provided with cog-wheels and
pulley Bs to rotate the same. The drying cylinder is shown surrounded by a steam
jacket B to heat the contents, and the stirring-shaft is provided with mechanism
for agitating the material and carrying heated pipes through the same.
Such means consists of spiders b¹ carrying a series of longitudinal blades b2 upon
their periphery, and a series of longitudinal steam pipes 63 connected at each end
by pipes o with steam passages in the shaft. Steam inlet and outlet pipes M and M¹
are connected by swivel joints at the ends of the shaft with the passages o, thus
forcing the steam through the pipes as they are moved in the material. The out-
lets are formed through the bottom of the cylinder, and manhole covers a¹ are
hinged at the sides of such outlets, and provided each with a toothed segment a².
A worm shaft e is mounted in bearings as adjacent to the segment, and provided
with a worm e¹ to fit the segment, and with a hand-wheel e2 to rotate the same.
The shaft projects at one side of the drying cylinder and the operator can thus
actuate the hand-wheel and open and close the manholes without getting beneath
the cylinder.
A longitudinal channel N is formed beneath the outlets a, and carrier chains n²
are traversed through such channel upon driving wheels n¹; and provided with an
apron or buckets to carry away the material discharged from the drier.
A vacuum pipe S provided with cock S¹ is extended from the top of each
rendering tank, as well as from the top of the hood G and drying cylinder B. The
rendering tanks are provided internally, as shown in one of the tanks in Figs. 16
and 17, with perforated stand-pipes t having an annular connection at the bottom,
to which a steam pipe T is extended, as well as a drain pipe U. These pipes are
provided respectively with cocks W and V.
The bottom of the jacket C¹ around the press-curb is also provided with a drain
pipe U¹ having cock V¹.
The jacket of the drying cylinder is provided with steam inlet and outlet
pipes T. The vacuum pipes serve, when connected with a condenser, to draw off
the gases and vapors generated in the several receptacles. The operation of the
apparatus shown in Figs. 1 and 2 is as follows.
The garbage is elevated to the floor at the tops of the rendering tanks, and the
latter are filled successively at suitable intervals, as eight hours each, the
valves K, H2 and V being closed, and the condenser connection S and steam
inlet T being opened. The steam pipe T diffuses steam throughout the material in
each rendering tank during the cooking operation, and the steam is then cut off by
cock W, and the drain pipe opened by means of cock V, to draw off as much as
possible of the liquid from the tank.

page_text: When the charge in each tank is cooked, the piston P is raised to the top of the
hood upon the press-curb, and the gate of the curb being closed, the valve H2 is
opened and the contents of the tank discharged into the curb through pipe H.
The valve H2 then being closed, the vacuum pipe of the press-curb is opened, and
the drain cock V₁ closed, and the piston is depressed within the curb to force the
liquid out of the material. When the material is pressed, the cock VI is opened
and the liquid escapes through the apertures u in the curb cylinder C, and is
discharged through the drain pipe to a suitable receptacle.
The pressing operation occupies but a short time, and the charge of compressed
material is then ready for discharge into the drying cylinder. The latter being
heated by the steam jacket and the pipes 63, the gate c³ and the valve H2 upon the
drying cylinder are then opened, and the material is discharged into the cylinder,
while the stirring blades 62 are rotated to distribute the same.
The valve upon the cylinder is then closed, the vacuum pipe opened to draw off
the gases and vapors, and the stirring continued for several hours until the
material is thoroughly dried, when the manhole covers a¹ are opened by actuating
the hand-wheels e², and the dried material discharged upon the carrier in the
channel N.
By making the press-curb and drying cylinder of the same capacity as one of the
rendering tanks, they are adapted to press and dry the material from all of the
tanks as fast as the material can be cooked, as their work in treating each charge
can be done in less than one quarter of the time required to render or cook such
charge. It in obvious that if the drying cylinder or press-curb were disabled,
four rendering tanks, which are shown in Fig. 1 connected therewith, would be
useless, and I have therefore, in Figs. 16 and 17, illustrated an arrangement by
which a large number of rendering tanks may be connected at pleasure with any
one of two or more press-curbs and drying cylinders; thus enabling a large
plant to work without interruption during the repairs or cleaning of any one of its
parts.
a row
In these figures, the rendering tanks F are shown arranged in
over a conveyor-box X, with the valve casing H¹ upon each tank connected
to such box to discharge therein. Two drying cylinders B, having each
a press-curb C, are connected with the conveyor-box by pipes H4, and the
conveyor X¹ within the box is operated to carry the material from any of the
rendering tanks to either of the press-curbs at pleasure. The pipes H are provided
each with a valve H at its junction with the box X, and the reception of the material
by either of the press-curbs or drying cylinders is determined by opening the
proper valve.
When a conveyor-box is used to connect the rendering tanks with
the press-curb or curbs, it is not essential that the press-curb should be placed
below the level of the rendering tanks.
With this construction, it is obvious that any of the tanks may be connected with
either of the curbs or drying cylinders, and the plant may thus be operated if
either of the curbs or drying cylinders is disabled by accident.
In a plant for large cities, six or eight of the drying cylinders would be furnished
and forty or fifty of the rendering tanks, each capable of holding several tons of
material, and by the mode of connection just described, the tanks may be operated
without liability to interruption by accident.
Very great economy of operation is secured by the combination of a series of
rendering tanks with a single press-curb and drying cylinder, as the operations are
so nearly automatic that very few operators are required, and the operation is
rendered entirely hygienic by connecting the parts with air-tight pipes and valves so
that the gases and vapors may be prevented from escaping into the atmosphere. By
providing the press-curb, rendering tank, and drying cylinder with separate
vacuum pipes for connecting them to a condenser, the vapors generated in each of
the receptacles can be drawn off separately when each is tightly closed and thus
disconnected with all of the others.
Such a construction has been found essential to constitute an entirely odorless

page_text: apparatus, and completely prevents the escape of all offensive odors in all stages of
the treatment.
With the apparatus thus far described, the press-curb can only be charged when
the cooking is completed in some particular rendering tank, but the apparatus may
be made to press and dry independent of the periods when such cooking is com-
pleted. Where this is desirable, a storage box or receptacle common to all the
rendering tanks may be interposed between the same and the press-curb, so that
the material may be discharged rom the rendering tanks whenever the cooking is
completed, which permits the press-curb to be charged with the same and the
pressing and drying effected at periods of time entirely independent of those at
which the rendering is completed in a given tank.
The conveyor-box X shown in Fig. 16, serves as such storage box, being
represented of greater height thau the conveyor screw X¹, and would, in practice,
be made of sufficient capacity to receive and retain the contents of one or more
tanks, and the screw X used to move the material from such box when filling one
of the press-curbs.
It will be obvious that the receptacles themselves, and the pipes and valves do
not need to be literally air-tight where the receptacles are connected with suitable
condensing apparatus by the vacuum pipes shown in the drawing; as the escape of
noxious gases to the atmosphere is wholly prevented by the maintenance of a partial
vacuum within the receptacles.
In practice, the receptacles are all made water-tight, to prevent the leakage of
offensive liquids, and they are closed as tightly as possible during the treatment of
the garbage, as the leakage of air into the receptacles through imperfect joints
would greatly increase the expense of maintaining the vacuum therein.
The most perfect form of the apparatus is that in which all the joints are air-
tight and the receptacles are hermetically sealed during the treatment of the
garbage.
No claim is made herein to means for disposing of the liquids, gases and vapours
which are generated during the rendering and drying operations; as they form no
part of the present invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is:
1. An apparatus for treating garbage which comprises a tightly closed rendering
tank, a tightly closed press-curb with opening in the bottom and piston for
compressing the material, and a tightly closed drier, the three receptacles being
connected by air tight pipes and valves and thus adapted to render, press and dry
the material in a coutinuous operation without the discharge of noxious gases, or
any exposure of the material under treatment to the atmosphere.
2. In an apparatus for treating garbage, the combination, with a press-curb
having valved outlet in the bottom, a piston to compress the material, and an air-
tight hood upon the top of the curb with stuffing box for the passage of the piston
rod, and inlets upon the sides of the hood, of a series of rendering tanks arranged
above the hood with valve and tight pipe connecting the bottom of each with one
of such inlets, by which the material from the rendering tanks may be successively
pressed in the same curve without exposure to the atmosphere.
3. In an apparatus for treating garbage, the combination, with a press-curb
having valved outlet in the bottom, a movable piston and a hood upon the top
with inlets at the sides, of a series of rendering tanks connected each at the bottom
by valved pipe with one of said inlets, a floor being arranged at the tops of such
anks to support the material when filling the same, and each tank having an inlet
with valve to close the same when filled.
4. In an apparatus for treating garbage, the combination, with a press-curb
aving perforated walls, of an air-tight jacket surrounding the same and having a
pipe to withdraw the compressed fluid, a hood fitted air-tight to the top of the

page_text: curb with inlet and valved pipe to insert the material, a piston with rod projected
through the hood, an air-tight funnel below the curb, and a gate fitted to the bottom
of the curb above the funnel, and adapted when retracted to open the entire bottom
of the curb, substantially as herein set forth.
5. In an apparatus for treating garbage, the combination, with a press-curb 5
having perforated walls, of an air-tight jacket surrounding the same and having a
pipe to withdraw the fluid, a hood fitted air-tight to the top of the curb with pipo
and valve to receive the material, a piston with rod projected upward through the
hood, an air-tight gate chamber attached to the bottom of the curb, and projected
at one side of the same, a funnel connected with the bottom of the gate chamber, 1
and a gate fitted to the bottom of the curb, and adapted when retracted to open
the entire bottom of the curb, as and for the purpose set forth.
6. In an apparatus for treating garbage, the combination, with a cylindrical
press-curb having perforated walls, of an air-tight jacket surrounding the same
with pipe to discharge the fluid, the rectangular plate c attached to the bottom of
the curb with the plate c' connected thereto by rectangular frame c², the openings
through the plates in line with the bore of the curb, the rectangular gate c³ fitted
movably between the plates and provided with bearing rolls c, a screw or screws 8
journaled in the frame c², with nut or nuts to move the gate, and means for rotating
the screw or screws to retract the gate, as and for the porpose set forth.
7. In an apparatus for treating garbage, the combination, with a drying
cylinder having filling inlet in the top and means for stirring the material, of the
funnel F attached to the inlct, the valve H2 at the bottom of the funnel, and gate
chamber H¹ attached to the top of the funnel, the press-curb attached to the top
of the gate chamber, with gate movable in the chamber and adapted when
retracted to open the entire bottom of the curb in discharging the material to the
drier, the gate chamber and funnel being air-tight to transfer the material without
the escape of gas and vapor, substantially as herein set forth.
8. In an apparatus for treating garbage, and comprising a drying cylinder with
press-curb mounted upon the top of the same and connected therewith, the
combination, with the drying cylinder having means for stirring the material, and
outlet a from the bottom of the cylinder, of the manhole cover a hinged at the
sides of said outlet, worm gearing connected with said cover, to close it from the
side of the drier, and a carrier movable beneath the outlet to carry away
the material when discharged from the outlet, as and for the purpose set forth.
9. In an apparatus for treating garbage, the combination, with a single press-
curb and a piston movable therein, of an air-tight hood fitted to the top of the
curb, a hydraulic cylinder sustained above the hood with piston rod extended
through the top of the same to the piston, a series of rendering tanks arranged
about such hydraulic cylinder above the hood, and separately connected therewith
by air-tight pipes and valves, a floor arranged at the tops of the rendering tanks
to support the material when filling the tanks, a valve fitted within each rendering
tank to close the inlet, the vertical boxes ³ projected from the tops of the tanks
upon the contiguous quarters of the same and provided with means for actuating
the valves, and a valve box with valve and pipes for controlling the movement of
the fluid in the hydraulic cylinder, with a handle g¹ extended adjacent to the
vertical boxes k³, so as to be actuated by the same operator, substantially as shown
and described.
10. In an apparatus for treating garbage, the combination, with a press-curb
having a gate at the bottom adapted to sustain the material when pressing the
same, a drier with air-tight pipe and valves connecting it to the outlet of the
press-curb, means for tightly closing the press-curb when charged, and vacuum
pipes for connecting the press-curb and drying cylinder separately with a condenser
to draw off the vapors, substantially as herein set forth.
11. An apparatus for treating garbage, comprising a tight conveyor box, a series
of air-tight rendering tanks above the same with tight pipes and valves connecting
them separately to the conveyor box, a series of air-tight press-curbs connected

page_text: with the conveyor box by suitable air-tight pipes and valves, and a conveyor
within the conveyor box for transporting the material from any of said tanks at
pleasure to any of said press-curbs, substantially as heroin set forth.
Dated this 5th day of August 1898.
THOMAS S. CRANE,
Agent for Applicant.