Improvements relating to Sifting Machines.
Year: 1898

page_text: Date of Application, 13th Apr., 1898
Complete Specification Left, 12th Jan., 1899-Accepted, 18th Mar.,
1899
PROVISIONAL SPECIFICATION.
Improvements relating to Sifting Machines.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., of 18,
Buckingham Street, Strand, W.C., London, Patent Agent, do hereby declare
the nature of this invention, a communication to me from abroad by the Firm of
Christian Fischer, Eisengiesserei & Maschinenfabrik, of 18, Argonstrasse, Augs-
burg, in the Empire of Germany, Iron Founder and Machine Manufacturer, to
be as follows:-
This invention relates to improvements in sifting machines in which displace-
able slot openings or perforations of a drum effect an automatical removal of the
grains or the like that may be jammed in the same, and in which by means of
regulating screws allows the adjustment of the slots to a certain size.
The drum is of hexagonal or polygonal cross section and consists principally
of two perforated steel plate surfaces, the one surrounding the other and the
perforations of the same being exactly similar. The outer one is displaceable
on the inner.
The movement of the so formed drum can be rotary only, or rotary combined
with a swinging motion.
For the rotary movement only of the drum the sieve slots or perforations are
arranged at right angles or thereabouts to the axle, and therefor the displacement
of the exterior covering must be effected in the longitudinal direction of the axle.
For the purpose of obtaining this displacement there are arranged on both
the ends of the displaceable covering two adjustable arms, which, at the highest
position during the revolution of the drum slide past and on two adjustable
rollers the first of which operates the displacement of the outer covering, in
order that the bodies jammed in the slots or perforations are disturbed and can
fall inwards, whilst the other roller operates the return of the outer covering
to its original position. By adjusting the rollers and arms, the displacement
can be regulated to suit any width of slot or perforation.
For the rotary and swinging movement of the drum the slot openings are
arranged in axial direction and therefore the displacement of the exterior cover-
ing must be effected contrary to the axle direction.
The drum is brought into swinging movement by a crank shaft, and into rotary
movement by a conical wheel having an arm on which a roller fixed on the axle
A suitable transmission
of the drum slides to and fro during the oscillation.
gearing operates this wheel.
As soon as the drum approaches the highest position, a nose of a guiding rail,
which is provided with oblique guiding slots, pushes against an adjustable
oblique plate, arranged above the drum and effects the displacement of the outer
cover, in order that the grains or bodies jammed in the slots can fall inwards.
Alternately to this oblique plate or surface there is on the support also
another adjustable oblique surface by which and by the rotary swinging move-
ment the said nose is again moved back into its previous position, and the outer
covering is moved back to its original position.

page_text: By adjusting these plates or surfaces by means of set screws the displacement
of the outer covering can be regulated.
In order to weaken the force of the swinging movement of the drum, suitable
rubber buffers or abutments are arranged. The drum is suspended on swinging
or movable bearings.
Dated this 13th day of
انسية
HERBERT HADDAN & Co.,
Agents to Applicant, 18, Buckingham Street, Strand, W.C., London.
Improvements relating to Sifting Machines.
I, HERBERT JOHN HADDAN, of the Firm of Herbert Haddan & Co., of 18,
Buckingham Street, Strand, W.C., London, Civil Engineer, do hereby declare the
nature of this invention, a communication to me from abroad by Christian
Fischer Eisengiesserei & Maschinenfabrik, of 18, Argonstrasse, Augsburg, in the
Empire of Germany, 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 sifting machines in which the sizes
or areas of slot openings or perforations of a drum are adjustable and by which
an automatic removal of the grains or the like that may be jammed in these slots
is effected and in which the slots can be adjusted by means of regulating screws
to a certain size or limit.
In the annexed drawing
Fig. 1 is a side view of the improved sifting machine.
Fig. 2 is an end view of the same.
Fig. 3 is a detail.
Fig. 4 is a side view of a different construction of the improved sifting
machines.
Fig. 5 an end view of the same.
Fig. 6 a detail.
As shown in Figs. 2 and 5 of the drawing, the drum is of hexagonal or polygonal
cross section and the surfaces of the same consist principally of two perforated
steel plates the one lying over the other the perforations of each being exactly
similar. The inner surface is fixed but the exterior one a is however displaceable.
The movement of the so formed drum can be rotary only (Fig. 1) or rotary
combined with a swinging motion (Fig. 4).
For the rotary movement only of the drum the sieve slots or perforations are
arranged at right angles or thereabouts to the axle (Fig. 1) and therefor the dis-
placement of the exterior covering must be effected in the longitudinal direction
of the axle.
For the purpose of obtaining this displacement there are arranged on both the
ends of the displaceable coverings adjustable arms c (Fig. 3) which, when the
surfaces are at their respective highest position during the revolution of the drum
slide past and on adjustable rollers de arranged on the framing carrying the
drum and the first of which operates the displacement of the respective outer
covering in order that the bodies jammed in the slots or perforations are dis-
turbed and can fall inwardly, whilst the other roller e operates the return of the
outer covering to its original position in order to give the slots their original
width as may have been adjusted. By adjusting the latter roller by the screw f,
the displacement can be regulated to suit any width of slot or perforation.
For the rotary and swinging movement of the drum (Fig. 4) the slot openings

page_text: are arranged in axial direction and therefore the displacement of the exterior
covering must be effected square to the axle direction.
The drum is brought into swinging movement by a crank shaft g and into
rotary movement by a conical wheel by its arm or bolt h, on which a roller i
fixed on the drum slides to and fro during the oscillation.
A suitable transmission gearing operates this wheel.
As soon as the respective drum surface approaches the highest position, in con-
sequence of its swinging movement the nose k of a guiding rail u which is pro-
vided with oblique guiding slots, pushes against an adjustable oblique plate 1,
Fig. 6, arranged above the drum and effects the displacement of the outer surface
in order that the grains or bodies jammed in the slots can fall inwards.
Alternately to this oblique plate or surface there is on the support also another
adjustable oblique surface m, by which and by the rotary swinging movement
the said nose is again moved back into its previous position and the outer
covering is moved back to its original position.
By adjusting these plates or surfaces by means of set screws the displacement
of the outer covering can be regulated as desired.
In order to weaken the force or push of the crank shaft in consequence of the
swinging movement of the drum suitable rubber buffers o or abutments are
arranged. The drum is suspended on swinging or movable bearings p.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. An improved sifting machine which automatically cleans itself and in which
the sifting slots or apertures of a many sided drum are adjustable in size, the
sides or surfaces of said drum being constructed of similarly perforated plates
lying one upon the other and which are so arranged that when arriving at their
respective highest position during a revolution of the drum a displacement of
one of the perforated plates upon the other causes an enlargement of the slot
openings whilst soon after the highest position has been attained by said surface
the original size of the slot openings is restored the said drum being put either in
rotary motion only or rotary combined with a swinging motion.
2. A form (Figs. 1 and 3) of the improved sifting machine as in Claim 1, in
which the sifting surfaces are provided with slot openings arranged at right
angles or thereabouts to the axle and in which the exterior plates being displaced
by arms arranged on both ends of the same sliding past and on a roller or rollers
and opening thereby the slots of this drum surface whilst by a second alternately
arranged arm the outer surface plate is again returned to its original position.
3. A form (Figs. 2 and 4) of the improved sifting machine as in Claim 1 in
which the sifting surfaces are provided with slots arranged parallel to the direc-
tion of the axle and in which the movable sieve surfaces are displaced by means
of noses of guiding rails u provided with oblique slots, pushing against adjust-
able oblique surfaces thereby moving the movable plate surfaces transversely
to the length direction of the drum respectively opening the slots whilst opposite
oblique surfaces m move back the guiding rails and hereby move the displaceable
plate surfaces back again to their original position.
Talk: 1911.
T
1000