IMPROVEMENTS IN ROTATORY DRESSING MACHINES FOR FLOUR AND OTHER PULVERULENT MATERIALS to be as follows:
Year: 1884

page_text: I, WILLIAM BLECKLY DELL of Mark Lane in the City of London, Milling
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
ROTATORY DRESSING MACHINES FOR FLOUR AND OTHER PULVERULENT MATERIALS
to be as follows:--
"
This invention relates to rotatory dressing machines for dressing flour and other
pulverulent material, in which the flour is introduced into a revolving drum
covered with silk or other material with very small perforations or openings in
order to separate the very fine particles from the coarser material. The invention
is however applicable with more particular advantage to those rotatory dressing
machines known as "centrifugal dressing machines" in which a series of rapidly
revolving beaters inside the drum catch up the flour and throw the same against
the screening surface of the slowly revolving drum. The invention consists in
applying to the interior of the drums of such centrifugal dressing machines, and of
rotatory dressing machines generally a series of longitudinal blades hung on pivots
at their inner edges, so that as they travel round with the drum their outer edges
are situated in close proximity to the screening surface of the drum while at the
lower positions, and as in rising they approach the highest position they fall away
from the drum and thus leave the screening surface entirely free. By this means
the said blades are made to act as scoops or elevators while passing round the lower
part of the drum, raising the flour that would otherwise mostly remain at the
bottom and, in the case of centrifugal machines, throwing the material on to the
beaters which then propel it against the screening surface; as the scoops or eleva-
tors rise to the top and fall away from the screening surface, as described, they
leave such surface entirely free to receive the flour projected against it by the
beaters and thus prevent such action being impeded by the surface of the scoops
[Price 6d1

page_text: and by the possible accumulation of flour against them, which would be the case if
the scoops or elevators were fixed. In the case of ordinary rotatory dressing
machines without centrifugal beaters, the said pivotted elevators would also act
advantageously in raising the flour to the top of the drum and then causing it to
fall down to the bottom, the swinging over of the elevators effectually preventing
the agglomeration of flour against the surface of the drum at the sides of the
elevators.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: COMPLETE SPECIFICATION.
I, WILLIAM BLECKLY DELL of Mark Lane in the City of London, Milling
Engineer, do hereby declare the nature of my invention for "IMPROVEMENTS IN
ROTATORY DRESSING MACHINES FOR FLOUR AND OTHER PULVERULENT MATERIALS
13
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 rotatory dressing machines for dressing flour and other
pulverulent material, in which the flour is introduced into a revolving drum
covered with silk or other material with very small perforations or openings in
order to separate the very fine particles from the coarser material. The invention
is however applicable with more particular advantage to those rotatory dressing
machines known as "centrifugal dressing machines" in which a series of rapidly
revolving beaters inside the drum catch up the flour and throw the same against
the screening surface of the slowly revolving drum. The invention consists in
applying to the interior of the drums of such centrifugal dressing machines, and of
rotatory dressing machines generally, a series of longitudinal blades hung on pivots
at their inner edges, so that as they travel round with the drum their outer edges
are situated in close proximity to the screening surface of the drum while at the
lower positions, and as in rising they approach the highest position they fall away
from the drum and thus leave the screening surface entirely free. By this means
the said blades are made to act as scoops or elevators while passing round the lower
part of the drum, raising the flour that would otherwise mostly remain at the
bottom and, in the case of centrifugal machines, throwing the material on to the
beaters which then propel it against the screening surface; as the scoops or eleva-
tors rise to the top and fall away from the screening surface, as described, they
leave such surface entirely free to receive the flour projected against it by the
beaters and thus prevent such action being impeded by the surface of the scoops
and by the possible accumulation of flour against them, which would be the case if
the scoops or elevators were fixed. In the case of ordinary rotatory dressing
machines without centrifugal beaters, the said pivotted elevators would also act
advantageously in raising the flour to the top of the drum and then causing it to
fall down to the bottom, the swinging over of the elevators effectually preventing
the agglomeration of flour against the surface of the drum at the sides of the
elevators.
The accompanying drawing shews a part end elevation and part cross section of
the drum of a centrifugal dressing machine with the before described invention
applied thereto.
A A A A are the longitudinal blades hung loosely upon spindles B carried by
the drum, so that as the drum rotates in the direction of the arrow, the blades, in
passing from the position A' to the position A³, will remain in contact with the
surface thereof, and will act as scoops in raising the flour, and causing it to fall on
to the beaters C, while on passing from the position at A³ to that at A' they will
fall over into the position there shewn, leaving the surface of the drum free to

page_text: receive the flour projected against it by the beaters, and they will remain in this
position until in descending they again approach the point A¹.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
The use in rotatory dressing machines of longitudinal blades loosely hung on
pivots and arranged so as to rest against the inner surface of the drum on the
ascending side thereof and act as scoops or elevators for the flour or other material
operated upon, and to fall away from such surface as they approach the highest
position and while descending on the opposite side, substantially as herein
described.