Improvements in Sifting or Bolting Machines.
Year: 1896

page_text: Date of Application, 13th June, 1896-Accepted, 22nd Aug.. 1806
COMPLETE SPECIFICATION.
Improvements in Sifting or Bolting Machines.
I, HEINRICH SECк, of No. 15 Leubnitzer Strasse, Dresden, in the Kingdom
of Saxony and German Empire, 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 bolting machines, and more especially to bolting
machines of that particular class having a stationary frame spanned with bolting
cloth and a rotatable frame mounted therein and provided with elevating wings,
which act to elevate the material to be bolted, and with propelling wings, which
act to throw the said material against the inner sides of the bolting cloth.
In some of the bolting machines as heretofore generally constructed, the use of a
stationary frame (although generally preferable by reason of the greater facility of
keeping the meshes of the bolting cloth free from obstructions) presented this
objection that a comparatively limited portion only of the surface of the bolting
cloth would come into proper action, because it would be always the same portion
thereof which would receive the impact of the greater part of the material to be
sifted, whilst the other portions of the surface of the bolting cloth would, to a
great extent, remain out of contact with the said material.
One object of my invention is to provide an improved construction of machine
wherein all portions of the sifting cloth, although the latter and the frame spanned
therewith, remain stationary when the machine is in operation, will be properly
and evenly acted upon, and other objects are to provide improved means for
cleaning the bolting cloth or keeping the same free from obstructions as well as for
rendering all portions of the bolting cloth and its frame easily accessible even in
such cases where the location of the machine presents difficulties in this respect.
My invention, therefore, consists in the details of construction and combination
of parts more fully hereinafter described and illustrated in the accompanying
drawings, in which-
Figure 1 is a central vertical longitudinal section of a bolting machine embodying
my improvements, the interior rotary frame and the bottom portion of the machine
being omitted.
Figure 2 is a vertical transverse section on the line -y of Figure 1, showing
the parts omitted above.
Figure 3 is a plan view of the brushing mechanism for keeping the bolting cloth
clean, the brushes themselves, however, being omitted.
Figure 4 is a central vertical longitudinal section of the feed-end portion of the
machine, drawn to a larger scale than Figure 1 and showing parts of the interior
rotary frame with its wings.
Figure 5 is a section on the line y-z, of Figure 4, as seen when looking to the
right in that figure.
Within the usual outer casing is mounted a cylindrical frame consisting of the
annular head portions t, the longitudinal portions q g' and the peripheral arms k
extending between the said longitudinal portions and supporting the usual bolting
cloth which thus forms an approximately cylindrical surface or web around the
entire frame. Journaled in suitable bearings provided in the end portions of the
outer casing, is the shaft m. Rigidly mounted on this shaft within the stationary

page_text: outer frame above described, and concentrically thereto, is the rotatable inner
frame, the same consisting, substantially, of suitable head portions, such as h,
secured on the shaft m by means of the hubs ' or otherwise near the ends of the
outer frame (Figure 4), and of suitable longitudinal connections between the said
two head portions. Extending either spirally or longitudinally on the outer
periphery of the said rotatable frame are the propelling wings or beaters a which,
upon the inner frame being rotated, act in conjunction with the centrifugal force
to throw the material to be bolted against the inner surface of the bolting cloth,
in a well-known manner. The said propelling wings or beaters are rigid on the
rotary frame, and each of them may either be formed with a continuous surface,
or be slotted at suitable intervals, as indicated in Figure 4. Movably journalled
with their axes in standards provided on the periphery of the rotary frame in
close proximity to the said propelling wings a are the elevating wings b, best shown
in Figure 5. The said elevating wings are pivotally connected, near the ends of
the rotary frame, with the outer ends of the rods g, the latter being with their
inner ends pivotally connected with an annular strap or ring f loosely surrounding
the shaft m and resting thereon in the position shown in Figure 5. The entire
mechanism is thus eccentrically supported on, and with relation to, the shaft m,
the lowermost of the elevating wings being, in the position shown in Figure 5,
inclined so as to approach with its outer edge as near as possible to the inner
periphery of the stationary frame, whilst the uppermost one of the wings lieз
approximately horizontally and the other two wings on the right and left occupy
intermediate positions. It will thus be seen that, when the rotatable frame is set
in motion by the rotation of the shaft m, the said wings and connections as well as
the annular strap will be rotated, likewise, and since the said annular strap, by
reason of its weight and of the weight of its connected parts, will in rotation
remain in its eccentrical position, each of the elevating wings b will consecutively
assume the different positions shown in Figure 5, thereby alternately changing
their position relatively to the surface of the bolting cloth, so that in the lowermost
position each of the wings will most efficiently seize and lift the material (fed into
the machine as indicated by the arrow in Figure 4) whereas, the nearer each wing
will approach the uppermost position the more readily and efficiently it will release
the material lifted to the required respective height. The material sliding down
along the inner surfaces of the elevating wings, after having been seized and while
being lifted by the latter, will be seized by the propelling wings a and thrown by
them against the inner surface of the bolting cloth on the outer frame. The
elevating wings b, at the same time acting during the rotary movement to displace
the air from within the space coutained between themselves and the said propelling
wings a, will produce within such space a certain rarefication of air, thereby
causing a current of air which will convey the material to the elevating wings b.
The latter will, at the same time, produce a pressure current of air moving in a
radially outward direction and the material will thus be thoroughly and evenly
distributed over the entire surface of the bolting cloth, this effect being materially
assisted by the reciprocating or swinging movements of the elevating wings as
described.
That portion of my invention the object of which is to provide for keeping the
meshes of the bolting cloth clean, consists essentially in a system of peripheral
arms extending parallel to the surface of the bolting cloth on the outside thereof
and having secured thereto, by means of springs or by other equivalent means, a
number of brushes which are thus made to bear with an elastic pressure against
the outer surface of the bolting cloth. The entire system of brushes is reciprocated
lengthwise of the stationary frame by means of a crank and connecting-rod
mechanism acting upon a bar to which the said peripheral arms are secured.
d designates the said bar and c the peripheral arms secured transversely thereto
and extending around the greater portion of the outer periphery of the bolting
cloth of the stationary frame. i and are transverse arms attached, at suitable

page_text: distances apart, to the said peripheral arms and having secured thereto at or near
their two ends the brushes n, as shown in Figure 2. The said brushes are curved
e is a
inwardly so as to make them conform to the surface of the bolting cloth.
connecting-rod pivotally connected with its one end to the bar d, whilst its other
end is pivotally connected with a crank arm el extending hozizontally from the
shaft journalled in the top portion of the outer casing of the machine and
carrying the worm-wheel e rotated through a worm es on the shaft e. The said
shaft e may have rotary movement imparted to it by means of a belt from the
main shaft m, as indicated in Figure 1.
It will thus be seen that by the rotation of the worm-wheel e* the bar d, and
with it the entire system of brushes, is reciprocated over the outer surface of the
bolting cloth, the result being that the brushes will remove from the meshes of the-
bolting cloth any particles of material that may have settled therein, and
the bolting cloth will thus be kept clean while the machine is in operation.
That part of my invention the object of which is to render all portions of the
frame spanned with the bolting cloth more readily accessible than heretofore, is
best shown in Figures 1, 2 and 4. vv are annular flanges preferably of cast iron
and secured to the opposite inner sides of the standards of the outer casing of the
machine, and these flanges are surrounded by the annular end portions t of the
frame, the said annular portions with their longitudinal connections 9 and q¹ being.
capable of turning or sliding on the said annular flanges. Since these parts,.
together with the longitudinal bars s and the peripheral arms k secured to the
parts g and g', form the outer frame, it will be seen that the latter may thus be
swung around on the said flanges vso that in such cases where, by reason of
the machine being unfavorably located, the one or the other side of the said.
frame is obstructed by other machines or the like and thus not readily accessible
for repairing purposes, the respective side portion of the frame may be swung or
turned around to the other unobstructed side where it will then be readily
accessible. Of course, when the machine is at work the said frame will remain
stationary, and as a means for normally holding it in position I may provide a
lever having at its outer end a counter weight ji and formed at its inner end with
a hook which enters a corresponding notch in a peripheral part r of the frame.
When it is desired to turn the frame on the annular flanges, the hooked end of the
lever will first have to be lifted out of the said notch and the mechanism for
reciprocating the said cleaning brushes, disconnected from its actuating mechanism,
as will be readily understood from the drawings. This done, the entire frame may
be swung around as described.
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. In a bolting machine the combination, with a stationary outer frame spanned
with bolting cloth, of a frame rotatably arranged therein and having the fixed
propelling wings a and the reciprocating elevating wings b, and a reciprocating
brush in contact with the outer circumference of the bolting frame, substantially
as and for the purpose described.
2. In a bolting nachine the combination, with a stationary outer frame spanned
with bolting cloth, of a reciprocating brush in yielding contact with the outside of
the latter, means as described for imparting to the said brush a to-and-fro movement
in the axial line of the machine, and a frame rotatably arranged within the said
stationary frame and having propelling and elevating wings, substantially as and
for the purpose described.
3. In a bolting machine the combination, with a stationary outer frame spanned
with bolting cloth and normally held locked in its stationary position, of means
for unlocking and swinging around the said frame, a frame rotatably arranged
within the latter and having propelling and elevating wings, and a reciprocating

page_text: brush in contact with the outer surface of the bolting cloth on the said normally
stationary frame, substantially as and for the purpose described.
Dated this 13th day of June 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.