Improvements in Apparatus for Driving Brushes of Rotary Sieves.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Driving Brushes of 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:-
The object of my invention is to provide a mechanical drive in the apparatus for
brushing rotary sieves, such as the apparatus for which I have applied for a Patent
No. 21453 of 1895.
In carrying out my invention, I place a crank upon a vertical or nearly vertical
spindle and I attach such spindle and crank to the rotary sieve frame so that they
have the same rotary movement, also I engage such crank with a stationary pin
fixed outside the sieve frame in such manner that the axis of the vertical spindle
moves around the said stationary pin, thus a revolving movement is communicated
to the spindle by its rotary movement around the said stationary pin, I communicate
motion from the rotary moving and revolving spindle by means of wheels or belts
or cords to the mechanical apparatus which operates the brushes in or upon the rotary
sieve or sieves.
I preferably transmit power from the mechanically driven vertical spindle to the
brushing apparatus by means of pulleys and belts arranged so that the said belts may
slip and fall off the pulleys in case the brushes should become obstructed inside the
machine, thus avoiding the breaking of the driving parts.
Dated this 29th day of July 1896
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
Improvements in Apparatus for Driving Brushes of 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 :-
This invention has for its object to provide a mechanical drive for the apparatus
for brushing the rotary sieves, such as that shown in my Application for Patent
No. 21453 of 1895.
The invention is best described by aid of the accompanying drawings, in
which,
Figure 1 is a vertical elevation, partly in section, and
Figure 2 a plan.

page_text: In these, A is a crank carried on a spindle D and a fixed shaft B carried in fixed
bearing or step C. The spindle D is supported on the rotary sieve frame E by means
of brackets F and the throw of the crank A being the exact radius of the circle of
rotation of the rotary frame E, the spindle D revolves with the rotary frame E round
the pin B, and at the same time turns on its axis one revolution for each entire
rotation of the rotary frame E. On the vertical spindle DI place pulleys G H and
in the frame E I fix in suitable bearings vertical shafts I, one only of which is
shown having similar pulleys H' G¹. To each spindle is attached a train of
gearing J and on the spindles K of the various gear wheels thus connected or on
some of them I place brushes L L brushing the underneath side of the sieve and if
desirable the upper side of the sieve below as shown.
In some cases I may use a second vertical shaft with pulleys and belts, placed on
the rotary frame E to receive motion from the shaft D and to give motion to the
shaft I, for the purpose of lowering the number of revolutions of the shaft I to any
desired speed.
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. The improvement in apparatus for driving brushes of rotary sieves, which
consists in driving them from a spindle placed outside the frame but movably
supported thereon and rotated by means of a crank swinging round a stationary
point, whereby the spindle is caused to make one revolution for each rotation of
the sieve frame.
2. The general arrangement and construction of apparatus for driving brushes of
rotary sieves substantially as herein described and illustrated.
Doted that J.
100
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, and London, Patent Agents.