Year: 1888

page_text: Date of Application, 7th Mar., 1888
Complete Specification Left, 27th Nov., 1888
Complete Specification Accepted, 22nd Jan., 1889
I, GEORGE HERBERT GREENWAY of the City Water Works, Barbourne, in the City
of Worcester, Engineer in charge, do hereby declare the nature of this invention to
be as follows:-
The object of this invention is to produce a machine which shall wash and elevate
sand in a more efficient and economical manner than heretofore, and which can be
moved about from place to place, and so constructed as to be made to deliver the sand
either to the right or to the left of the hopper into which the sand is fed.
The invention consists of a horizontal pipe with a hopper at one end and a receiving
tank at the other.
The said receiving tank is supplied with a head of clean water which flows along
the pipe and discharges into a gutter bolted on to the hopper. Hose pipes are screwed
on to the gutter so that the water can be carried to any convenient locality and there
discharged.
The sand is fed into the hopper and worked against the head of water by an
Archimedean screw being thoroughly disintegrated in its progress along the horizontal
pipe, until it reaches the receiving tank at the other end. It is there taken up by
perforated dredger buckets working on an endless chain, and delivered clean at the
top of the elevator.
The machine is mounted on wheels and furnished with a winch handle and suitable
gearing, so that the machine can readily be made to travel back or forward if
necessary.
The receiving tank is so constructed that the horizontal pipe may be fitted on to
either side as required, the blades of the Archimedean screw can also be reversed;
and the machine taken to pieces and transported to any suitable position and there
put together so as to deliver the sand either to the right or to the left of the
hopper.
CASTLE SMITH,
"Invention" Office,
54, Fleet Street, London, E.C.,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improved Portable Sand Washing and Elevating Machine.
I, GEORGE HERBERT GREENWAY of the City Water Works, Barbourne in the City
of Worcester, Engineer in charge, 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 this invention is to produce a machine which shall wash and elevate
sand in a more efficient and economical manner than heretofore, and which can be
moved about from place to place, and so constructed as to be made to deliver the sand
either to the right or to the left of the hopper into which the sand is fed.
The invention consists of a horizontal pipe with a hopper at one end and a receiving
tank at the other.
The said receiving tank is supplied with a head of clean water which flows along
the pipe and discharges into a gutter bolted on to the hopper. Hose pipes are screwed
on to the gutter so that the water can be carried to any convenient locality and there
discharged.
The sand is fed into the hopper and worked against the head of water by an
Archimedean screw being thoroughly disintegrated in its progress along the horizontal
pipe until it reaches the receiving tank at the other end. It is there taken up by
perforated dredger buckets working on an endless chain, and delivered clean at the
top of the elevator.
The machine is mounted on wheels and furnished with a winch handle and suitable
gearing so that the machine can readily be made to travel back or forward if
necessary.
The receiving tank is so constructed that the horizontal pipe may be fitted on to
either side as required the blades of the Archimedean screw can also he reversed; and
the machine taken to pieces and transported to any suitable position and there put
together so as to deliver the sand either to the right or to the left of the hopper.
And in order that my invention may be more fully understood and carried into
practice, I will now proceed to describe the same with reference to the accompanying
drawings in which similar letters indicate corresponding parts in all the figures.
Figure 1 is a partly sectional elevation of my invention.
Figure 2 is a partly sectional elevation on the line XX Figure 1.
Figures 3 and 5 are partly sectional elevations on the line Y Y Figure 1 looking
in opposite directions.
Figure 4 is a partly sectional elevation on the line ZZ Figure 1.
Figures 6 to 9 are enlarged views shewing details of construction.
The sand to be washed is fed through a shoot or other device into the mouth (of
the cylindrical revolving screen D the shaft of which is set at any convenient angle
to the horizon and revolves in bearings on the brackets E and E' one of which is
bolted to the side of the hopper and the other bolted to the horizontal pipe or
tube A. The lower part of the screen D passes through one of the sides of the
hopper F, and the lower end G has an opening or openings of convenient size through

page_text: which large stones and other unscreened material are discharged into a suitable
receptacle placed thereunder. To avoid complication the feeding shoot and the
receptacle for the unscreened material are not shewn in the drawings but they will
be readily understood without illustration. Rotary motion is imparted to the shaft
of the screen D either by a band passing over a pulley K on the shaft J or in any
other convenient manner.
The said horizontal shaft J is actuated by a coupling, band or strap from a suitable
steam, gas, water or other motor. The shaft J is carried by plummer blocks L fixed
on brackets M bolted or otherwise secured to the horizontal pipe or tube A or to
other fixed parts of the machine. A pinion wheel O is keyed upon the shaft J and a
fly wheel N is also fixed to the said shaft J to render the motion thereof uniform.
The pinion wheel O gears into the toothed wheel P upon the main shaft B. The said
main shaft B which extends from the toothed wheel P to the pulley or drum or chain
wheel S fixed at or near the other extremity, passes through a watertight gland or
stuffing box O in the end of the horizontal tube A (see Figure 4) and through a
similar gland and stuffing box Q1 in the receiving tank R. (see Figure 1). A similar
drum or pulley or chain wheel S₁ is fixed upon a horizontal spindle U passing through
bearings T, T, in the top of the elevating frame. When the machine is working, an
endless band or chain passes over the two drums or wheels S and S¹.
Upon the centre of that part of the main shaft B which passes through the receiving
tank R a sprocket wheel V is fixed and a corresponding sprocket wheel V' is fixed on
the upper spindle U. These sprocket wheels carry an endless chain on which is fixed
any convenient number of perforated dredger buckets U dipping nearly to the bottom
of the receiving tank R. Any other suitable and well known elevating device may
be substituted for the chain and sprocket wheels if desired.
Specially constructed blades a are fixed in the form of an archimedean screw on
the main shaft B. That part of this main shaft which is within the horizontal tube A
is preferably made square in cross section so that the blades may be more firmly
secured thereon.
Figure 7 shews in elevation part of the main shaft with the blades properly fixed
thereon; and
is
Figures 8 and 9 are respectively front and side views of the blades shewing the
method of attachment to the shaft B. An end elevation of the shaft and blades
shewn in Figure 3. Each arm b carrying its blade a is provided with a shoulder e to
rest upon the main shaft B and also with a spindle a screw threaded at its further end
which spindle is passed through the shaft B and the arm kept in position on the said
shaft B by suitable lock nuts and washers d. The blade a is rivetted or otherwise
affixed to the arm at such a distance from the shoulder e that the water used in
washing the sand may freely flow between the bottom of the blade a and the shaft B.
The blades are so fixed upon the shaft B, that they follow one another round in the
form of an archimedean screw.
The horizontal pipe or tube A may if desired be made in sections with flanges
thereon and bolted together as at W Figure 1. The shaft B is preferably steam
piping with solid ends because of its lightness but it may be a solid shaft. It can also
be supported by any suitable number of bearings within the horizontal tube A, but
this is not desirable as it would interrupt the continuance of the archimedean screw
herein before described. For preference three bearings only are provided for the main
shaft, viz. one at each end of the tube A, and the third at Q¹ in the receiving
tank R.
Figure 6 shews the method adopted to keep the bearings of the main shaft B free
from grit, dust, sand or other similar substances. Through the back, or that part of
each bearing towards which the washing water is advancing, a pipe g passes, its end
being open on to the shaft. B. Into this pipe clean water under pressure is led from
the supply to motor or receiving tank R or from any other suitable source.
this water cannot pass through the stuffing box it will flow through the back of the
bearing and force out from the bearing any grit dirt sand &c. and will prevent the
same from being deposited thereon by the washing water.
As

page_text: The machine is mounted upon wheels; four only are shewn in the drawings, but
any other number may be used as desired. Figures 3 and 4 shew the gearing used
for moving the machine backwards and forwards in a straight line. It consists as will
be seen simply of an arrangement of toothed wheels and pinions actuated by a winch
handle but any other arrangement of mechanism which will effect the same object
may be substituted for that shewn. The pipe h which serves as an overflow for tank
into gutter is screwed to a flange and bolted to the side of the receiving tank R.
Similar means for attachment are provided on the corresponding part of the other
side of the tank. The other end of this pipe his fixed so as to fit over the edge or
lip of the gutter k to which it may be screwed or otherwise fastened if desired.
horizontal tube A is bolted or otherwise secured by the flange i to the side of the
tank R. A plate j the same size as the flange i is bolted over an opening in the opposite
side of the tank of equal size with the opening leading from the tube A into the tank.
By unshipping the tube and shaft from the elevator and reversing the direction of the
archimedean screw by turning the blades a thereon when the plate j is removed,
the tube A may be bolted to the opposite side of the tank the pipe h can also be
secured on this side and by these means the machine made to deliver the washed sand
to the right side of the hopper instead of the left as shewn in Figure 1.
The
When it is required to take the machine to pieces to transport it from place to
place, the tube A and shaft B are unshipped and taken to pieces when made in
sections, and the blades a unshipped from the shaft B if necessary, and the whole
placed upon a waggon or other means of transport.
The action of the apparatus is as follows:-
Water under pressure is led into the receiving tank R and flows along the tube A
into the hopper H and rises into the gutter k from whence it is led off by hose pipes
affixed to nozzles 7. The sand to be washed falls through the hopper F into the
hopper H and on to the blades a on the shaft by which it is worked along
the tube A into the receiving tank and lifted by the elevator buckets.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1) The construction and use of the blades a and arms & substantially as and for
the purpose herein before set forth and illustrated in Figures 7, 8 and 9.
(2) The screw formed upon the shaft. B in the manner described so that water may
flow longitudinally along the shaft beneath the blades a and so that the direction of
the screw may be reversed when required, substantially as and for the purpose
bereinbefore set forth and illustrated in Figures 7, 8 and 9.
(3) The construction and use of bearings into which water under pressure is led,
to prevent the deposit of grit, sand or dirt on the said bearings substantially as herein-
before set forth and illustrated in Figure 6.
(4) The arrangement and combination of parts forming my improved sand-washing
and elevating machine all operating substantially as hereinbefore set forth and
illustrated in the accompanying drawings.
Dated this 97th day of Navamhan 1000