Year: 1888

page_text: Date of Application, 20th Apr., 1888
Complete Specification Left, 17th Jan., 1889
Complete Specification Accepted, 23rd Feb., 1889
I EPHRAIM BURTON of White Swan Wharf, Nine Elms, in the County of Surrey,
Contractor, do hereby declare the nature of this invention to be as follows:-
My Invention relates to an improved rotary riddle or sifter, principally intended for
sifting ashes and other refuse; and it consists of a sifting drum of polygonal form in
cross section having no central shaft or end frames but supported and revolved from
the exterior, leaving the interior, and particularly the ends, unobstructed by any
spokes or frames which impede the supply and discharge of the matters to be sifted.
It is constructed of a polygonal, preferably octagonal, framework having externally
circumferential roller paths which rest on pairs of supporting rollers, and spur rings
through which rotary motion is communicated to the frame. The frame is clothed
with the usual wire cloth of varying mesh, throughout the length of the sieve.
The drum is provided with a roller path at the lower end which runs against rollers
on a cross-shaft, whereby the drum is prevented from sliding off the supporting
rollers.
The matters to be sifted, are supplied by an elevator to a feed hopper and by it
delivered to the rotary riddle, and the tailings in falling from the lower end of the
riddle, are winnowed by a blast.
E. BURTON.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: 1 EPHRAIM BURTON of White Swan Wharf, Nine Elms, in the County of Surrey,
Contractor, 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 :-
1
**
:
-
My invention.relates to an improved rotary riddle or sifter, principally intended for.
sifting ashes and other refuse; and it, consists of a sifting drum of polygonal form in
cross section having no central shaft or internal end frames but supported and revolved
wholly from the exterior, leaving the interior and particularly the ends, unobstructed
throughout by any spokes or frames which would impede the supply and discharge of
the matters to be sifted. The polygonal forni increases the efficiency of the riddle by
constantly turning over, and thoroughly agitating the matters to be sifted.
Reference is to be had to the accompanying drawings forming part of this
specification, wherein figure 1 is a longitudinal elevation, and figuré 2 a part plan of
the apparatus. Figure 3'is a cross section of the drum., Figure 4 is an end elevation,
and figure 5 a horizontal section of the lower end of the drum. The same letters of
reference indicate the same parts in all the figures.
The drum A is constructed of T iron frame work a, of polygonal; preferably
octagonal, form having externally circumferential circular rims forming roller
paths B B which rest on pairs of supporting rollers band spur rings C through
which rotary motion is communicated to the frame: The frame (clothed with the
usual wire cloth of varying mesh, the sections A¹ A2 A3 A* being of progressively
coarser guage) is supported by the rollers 6 at an inclination of about 1 in 10, and the
edge of the rim B' at the lower end forms a path which runs against a pair of rollers D
on a cross shaft d whereby the drum is prevented from sliding off the supporting
rollers b.
The drum is driven by a pair of pinions c gearing with the toothed rings C and
carried by a longitudinal shaft c¹ mounted parallel to, and at one side of, the drum.
The matters to be sifted are supplied by a bucket elevator E to the open upper end of
the rotary riddle A, the chain of buckets passing over tumblers, of which one is driven
by worm gear F from the shaft c¹, the elevator dipping into a pit into which the
matters are shot through a grating G. The tailings as they fall from the lower end of
the riddle may be winnowed by a blast.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is- .
The herein described rotary polygonal drum-shaped riddle or sifter open throughout
and provided with circumferential and end roller paths and mounted to run on and
against pairs of friction rollers, and provided with external driving gear substantially
as described.
Dated this 17th day of January 1889.
E. BURTON.
By A. M. & Wm. Clark,.
53; Chancery Lane, London,
Patent Agents.
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