Sand Sifting Machine for Foundry and other Purposes.
Year: 1892

page_text: Date of Application, 21st June, 1892
Complete Specification Left, 18th Mar., 1893-Accepted, 21st June, 1893
PROVISIONAL SPECIFICATION.
Sand Sifting Machine for Foundry and other Purposes.
JOHN PERCY HALL, Managing Engineer, Carville, Lawrie Park Road.
Sydenham, THOMAS GLOVER, Founder 15 Lind Street, Deptford, S.E. do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to provide a simple and efficient means of sifting
sand, loam, or other similar material, and separating the fine grains from the
coarse.
"
The apparatus consists of a pan or vessel raised from the ground on legs or
brackets. The bottom of this vessel is fitted with a riddle or sieve made of wire
gauze of cast iron or other material, the meshes or holes being of such a fineness as
may be required.
On the upper flange of the pan is fitted an arched frame which carries a vertical
shaft, to the lower end of this shaft is fitted a cross, each arm being provided on
its under side with square (or round) teeth the corners of which are in line with
the radius of the arms. The lower ends of these teeth are tapered and slightly
bent or curved backwards. The teeth in the arms of the cross are placed at
different centres, so that in revolving the whole of the material on the sieve or
riddle is disturbed.
The upper end of the vertical shaft is fitted with a bevel wheel geared to a
similar wheel fixed on a horizontal shaft which is carried by a bearing on the above
arched frame, the outer end of this shaft carries a fast and a loose belt pulley for
driving the above mentioned cross or harrow.
The pan of the machine may be made to revolve with the cross or harrow fixed,
or the cross arms may be fixed around a horizontal shaft and revolved in a frame
while the bottom part of the frame forms the sieve or riddle.
The driving shaft may be led from below or in a manner to suit the position of
the machine.
Dated thin 10th dome of Lu 1900
J. P. HALL.
THOMAS GLOVER.
COMPLETE SPECIFICATION.
Sand Sifting Machine for Foundry and other Purposes.
JOHN PERCY HALL, Managing Engineer, Carville, Lawrie Park Road,
Sydenham, THOMAS GLOVER, Founder, 15 Lind Street, Deptford, S.E. 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 apparatus consists of a pan (A) or vessel raised from the ground on legs
or brackets. The bottom of this pan is fitted with a riddle or sieve (B) made of
wire or cast iron or other material-the meshes or holes being of such a fineness
as may be required.
On the upper flange of the pan is fitted an arched frame which carries a vertical
shaft, to the lower end of which is fitted a cross (C) each arm of which is provided
on its under side with square or round teeth (D).
The lower ends of these teeth are tapered & slightly bent or curved backwards
& are placed at different centres in the arms of the cross so that in revolving the
whole of the material in the sieve or riddle may be operated upon.

page_text: The upper end of the vertical shaft is fitted with a bevel wheel and geared to
a similar one fixed on a horizontal shaft which is carried by a bearing on the above
mentioned arched frame, the outer end of the shaft carrying a fast and a loose
belt pulley for driving the cross; or the apparatus may consist of a pan hung or
attached by its top edge to a vertical spindle carried by a frame or bracket raised
from the ground, the bottom of this pan is fitted with a riddle or sieve in the
centre of which is a hole through which projects a spindle which carries a
stationary cross with teeth on its lower edge, shaped similar to those in the fore-
going case.
The upper end of the vertical shaft which carries the pan is fitted with a bevel
wheel & geared to a similar one fixed on a horizontal shaft carried by a bearing on
the above mentioned frame or bracket, the outer end of the shaft is fitted with a
fast and a loose pulley or other suitable gearing for driving the pan.
Or, the apparatus may consist of a circular box fixed with its axis horizontal on
a bracket or frame raised from the ground, the lower part of the circumference of
the said box being fitted with a riddle or sieve, while the top part of its circum-
ference is fitted with a hopper through which the sand or material to be operated
upon is introduced.
Through the centre of the box in line with the axis is fitted a horizontal shaft
carried by bearings on the above mentioned frame or bracket while around the
circumference of this shaft are fitted teeth which project radially inside the box
and are shaped similarly to those previously described, on the outer end of the
horizontal shaft is fitted either a fast and a loose pulley or other suitable means of
revolving the shaft.
The driving shaft may be led from below or in a manner to suit the position of
the machine.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is―
1. The method of riddling or sifting sand or other material by means of a fixed
sieve or riddle having a top revolving disc or cross with teeth on its under side
revolving or moving close to it, which teeth break up the material that is being
sifted or the same object may be obtained by having the teeth or disc fixed, &
the riddle moving, or the teeth may be fixed around a horizontal shaft and revolved
in a frame, the bottom part of which forms the sieve.
2. A sand sifting machine substantially as described and illustrated in the
accompanying drawing as a labor saving machine.
Dated this 17th day of March 1893.
J. P. HALL.
THOMAS GLOVER.