Improvements in Apparatus for Driving and Carrying Rotary Sieves.
Year: 1895

page_text: Date of Application, 22nd July, 1895
Complete Specification Left, 22nd May, 1896-Accepted, 27th June, 1896
PROVISIONAL. SPECIFICATION.
Improvements in Apparatus for Driving and Carrying Rotary
Sieves.
I, JAMES HIGGINBOTTOM of 32 Seel Street, Liverpool in the County of
Lancaster, Milling Engineer, do hereby declare the nature of this invention to be
as follows:
:-
My improvements are intended to be applied to rotary sieves used for separating
purposes and the object of my invention is to obtain a novel and improved means of.
driving and carrying rotary sieves by means of cranks or crank discs without the
use of hanging suspenders.
The following is a description of one mode of carrying out my invention. To
the underside of the frame carrying the sieve or sieves, I attach two or three or
more carrying pins, each of which rests in and upon sockets formed in a carrying
crank or crank discs. Each of the carrying cranks is attached to a revolving
vertical shaft and each vertical shaft and carrying crank is supported or carried by
means of a carrying bracket attached to the floor or to carrying framework. One
or two or more of the vertical crank shafts are caused to revolve by means of one
or two or more driving shafts and toothed gearing connected in such manner that
when motion is imparted to one or more of the driving shafts, the motion is
transmitted by means of the toothed gearing to the vertical shafts attached to the
cranks, thereby causing the carrying cranks to revolve.
By these means the sieve frame is supported or carried by cranks at two or
three or more points and a rotary motion being imparted to one or simultaneously
to two or more of the carrying cranks, the sieve frame with its contained sieves is.
supported or carried and at the same time a rotary motion is imparted thereto.
The features of advantage gained by my invention are that the weight of the
sieve and the application of the moving power can be divided over two or more
points of driving and support, thus securing a better control over the path of
motion of the sieve and thereby a greater steadiness and uniformity of motion is.
obtained in the sieve frame and sieves and in the material being treated. Also
the injurious vibration arising to buildings from the use of rotary sieves, is thereby
lessened.
In another method of carrying out my invention, I may use sockets upon the
sieve frame carried by pins upon the revolving carrying cranks with vertical crank
In some cases I may
shafts and driving shafts moving as above described.
transmit motion from one carrying crank shaft to another by means of link chains
instead of toothed gearing, or I may form a combination of the driving shafts with
toothed gearing and link chains. In some cases I may fix one or more balance
wheels to the driving cranks, or to one or more of the driving shafts to prevent or
minimise back lasb.
ليهم
.
CT1
1005

page_text: Improvements in Apparatus for Driving and Carrying Rotary
Sieves.
I, JAMES HIGGINBOTTOM of 32 Seel Street, Liverpool in the County of
Lancaster, Milling Engineer, 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 :-
My-improvements are intended to be applied to rotary sieves used for separating
purposes and the object of my invention is to obtain a novel and improved means of
driving and carrying rotary sieves by means of cranks or crank discs without the
use of hanging suspenders.
F
The invention is best described by aid of the accompanying drawing, in
which,
Figure 1 is a plan view with the plansifter or rotary sieve frame removed, its
supporting pins B only being left in section ;
Figure 2, side view of apparatus ;
Figure 3, end view of same;
Figure 4, sectional view of part of bottom plate of plansifter, a carrying pin, a
balance wheel and its supporting bracket.
To the underside of the frame A carrying the sieve or sieves I attach two or
three or more carrying pins B (four in the drawing), each of which rests in and
upon sockets formed in a carrying crank, crank discs or balance wheels C. Each
of these balance wheels or the carrying cranks is attached to a revolving vertical
shaft D and each vertical shaft and balance wheel or carrying crank is supported
or carried by means of a carrying bracket E attached to the floor or to carrying
framework E. One or two or more of the vertical crank shafts is caused to
revolve by means of one or two or more driving shafts not shown, and toothed or
other gearing (belting F is shown in the drawing) connected in such manner that
when motion is imparted to one or more of the driving shafts, the motion is
transmitted by means of the belting or gearing to the vertical shafts attached to
the crank balance wheels or cranks, thereby causing the carrying cranks to
revolve uniformly.
By these means the sieve frame is supported or carried by cranks at two or
three or more, preferably four, points and a rotary motion being imparted to one
or simultaneously to two or more of the carrying cranks, the sieve frame with its
contained sieves is supported or carried and at the same time a rotary motion is
imparted thereto.
The features of advantage gained by my invention are that the weight of the
sieve and the application of the moving power can be divided over two or more
points of driving and support, thus securing a better control over the path of
motion of the sieve and thereby a greater steadiness and uniformity of motion are
obtained in the sieve frame and sieves and in the material being treated. Also the
injurious vibration arising to buildings from the use of rotary sieves, is thereby
lessened.
In another method of carrying out my invention, I may use sockets upon the
sieve frame carried by pins upon the revolving carrying cranks with vertical
crank shafts and driving shafts moving as above described. In some cases I may
transmit motion from one carrying crank shaft to another by means of link chains
instead of belts or toothed gearing, or I may form a combination of the driving
shafts with toothed gearing and link chains.
It will be seen at once that crank pin B and its socket not being in line with the
shaft D balance wheel G virtually is a crank. I prefer this form of balance

page_text: wheel crank to the ordinary one, as the balance wheel serves the three fold
purpose of
1st. Carrying the balance weight H and thus counterbalancing the weight of
the sieves and diminishing the injurious vibrations which would otherwise arise in:
the building from the use of the rotary sieve frame
2nd. A crank
3rd. A wheel to carry the belting or chain gearing or if toothed to be driven by
toothed gearing.
In some cases I may fix one or more balance weights or wheels or discs balanced
by weights H to the driving cranks or to one or more of the driving shafts to.
prevent or minimise back lash and avoid the injurious vibration above mentioned.
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 combination with a rotary plansifter sieving device a supporting driving
and balancing device consisting of pins and sockets, the one on the rotary sieve
frame, the other on the crank devices, two, three or preferably four crank devices.
carrying these pins and sockets and carried in turn on vertical shafts with
counterweights counterweighting the swinging movement of the rotary sieving.
device.
2. In combination with a rotary sieving device supported on a series of cranked
vertical shafts or their equivalent, the toothed or smooth rimmed balance wheels.
or crank discs G acting at the same time as balance wheels and power conductors,.
substantially as described.
1000
2412
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents..