Improvements in and relating to Sifters, Screens, or the like.
Year: 1893

page_text: Date of Application, 7th Oct., 1893
Complete Specification Left, 7th July, 1894-Accepted, 11th Aug.,
1894
PROVISIONAL SPECIFICATION.
Improvements in and relating to Sifters, Screens, or the like.
We, ROBERT HALLAM, of 30 Welford Road, Leicester in the County of
Leicester, Ironmonger and Hardware Dealer, and WILLIAM LUCAS, of Dronfield
Forge, Dronfield in the County of Derby, Manufacturer, do hereby declare the
nature of this invention to be as follows:-
This invention refers to improvements in and relating to sifters, screens or
a dust pan and cinder
the like to provide a combination of such articles as
sifter, or a combination of perforated plates, screens or cylinders for the purpose
of regulating size in screening coal, stones, gravel or any other granulated
substances.
The aforesaid combined dust pan and cinder sifter is made of two plates of iron
or steel one being placed upon the other and both being perforated with corre-
sponding holes, the meshes being of any size desired.
The upper plate is somewhat shorter than the pan to enable it to be moved
forward to bring its outer edge level with that of the pan, and so as to open
the holes, and back again to its normal position to close the holes and make a solid
dust pan, or on the contrary to open the holes and then form a cinder sifter.
To bring the holes in each plate, or the plate and pan opposite to each other
I employ a bar or extension of the top plate, or an attachment thereto, passing back
to a convenient position.
This bar or extension is pushed forward upon taking hold of the handle, and
after riddling the contents of the pan it is brought back again to its first position.
The handle may be made hollow, and may enclose the slide bar having thereon
a coiled spring, which will, upon the handle being released cause the inside
plate to immediately return to its normal position. The perforated plate may slide
either in grooves, or lugs upon the sides of the pan, or they may telescope one
within the other; so that the plates are kept close together in the forward and
backward movement.
As applied to screens whether cylindrical or otherwise, each plate or cylinder is
perforated as before described so that upon being moved one over the other
by suitable means the size of mesh can be altered at will, and in screens for
stone mills and the like, the series of cylinders may allow of several sizes of
meshes if desired-such perforations or holes may be round, square, or other
suitable shape.
In cylindrical articles, the inner perforated cylinders are turned or otherwise
moved to close up the holes in the outer cylinder or to open them as required.
This invention of movable perforated plates may be applied to the bottoms of
fire grates, for cinder sifting.
Dated the 30th day of September 1893.

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Sifters, Screens, or the like.
We, ROBERT HALLAM, of 30 Welford Road, Leicester in the County of
Leicester, Ironmonger, and Hardware Dealer, and WILLIAM LUCAS, of Dronfield
Forge, Dronfield in the County of Derby, Manufacturer, 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 improvements in and relating to cinder shovels or
sifters, and screens, and more particularly to a combination of such articles as a
dust pan or shovel and cinder sifter, or if desired a combination of perforated plates,
to form a screen or cylinder for the purpose of regulating the size of the mesh in
screening coal, stones, gravel or any other granulated substances:
In the construction of a combined dust pan or shovel and cinder sifter we
use two plates of iron or steel one being placed upon the other and both being
perforated with corresponding holes or slots the meshes being of any suitable shape
and size.
Such a shovel and sifter is shown in the annexed drawings.
Fig. 1, being a front view or plan.
Fig. 2, a section of same.
as to
The upper plate A, is somewhat shorter than the pan or lower plate B, to enable
it to be moved forward without projecting beyond the plate B, and so
open the holes C, and when moved back to its normal position, to close the
holes and make a solid dust pan, or on the contrary to open the holes, and thus
form a cinder sifter or riddle, permitting the ashes to fall-through and retaining
the cinders.
To bring the holes C, in each plate A, and B, opposite to each other or to
partially open same as desired, I preferably employ an extension of the top plate,
a knob or preferably an attachment thereto in the form of a bar D, passing back to
a convenient position, which in the arrangement shown is through an opening E,
in the cofer F, and terminating in a ring or hook G, at the back of the handle
socket H.
This bar or extension D, is pushed forward upon taking hold of the shovel by
the handle 1, and after riddling the contents of the pan, it may be brought back
again to its first position.
The sliding action of the plate A, may be made across the pan B, if desired.
The handle of the shovel may be made bollow, enclosing the slide bar and having
thereon a coiled spring, which will, upon the plate A, being released cause it to
immediately return to its normal position.
The edges of the perforated plate A, may slide either in slots, grooves, or under
lugs J, upon the sides of the pan, so that in all conditions the plates are kept close
together in the forward and backward movement.
As applied to screens whether flat, curved or cylindrical, each plate or cylinder
is perforated as before described and constructed so that upon being moved one
over (or inside) the other by suitable means, the openings can be closed or the
size of mesh can be altered at will, and in screens for stone mills and the like,
the series of cylinders may be thus constructed, so that, the mesh of any of the
series can be adjusted in size.
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. A shovel or cinder sifter having a perforated bottom plate B, and a perforated
sliding top plate A, attached thereto, and capable of being moved th

page_text: to open, partially close, and fully close the perforations in the bottom plate,.
substantially as described.
2. A perforated screen either flat, curved, or cylindrical, having a second
perforated plate or cylinder, capable of being moved so as to open and close or
partially open and close the perforations, for the purpose specified.
Dated the 5th day of July 1894.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.