Year: 1886

page_text: ɓate of Application, 5th Mar., 1886.
Complete Left, 6th Dec., 1886.
Complete Accepted, 7th Jan., .1887.
I, CHARLES EDWARD MUMFORD, of Bury St. Edmunds, in the county of Suffolk
Engineer do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in machines for dressing and winnowing
grain, seeds, and the like whereby the speed of the fan or blower can be altered by
simply adjusting the driving wheel, and motion is communicated to the bottom screen
or sieve, and the back part of the shoe or back riddle box is raised or lowered in a
better manner than hitherto.
In carrying out my invention the blower spindle is fitted with a double spur pinion
instead of a single one as has been the case with dressing machines and winnowers as
hitherto constructed. The post and bracket which carry the spindle upon which the
driving wheel is hung are each fitted with two bush bearings; when the fan is
required to be driven at the ordinary or usual speed the top bearing is employed
which causes the driving wheel to gear with the larger of the pinions upon the blower
spindle; the said driving wheel is fastened upon its spindle by means of a set screw
passing through a long boss for the purpose of keeping the said wheel in position
when driving the fan at either rate of speed. When the fast speed is required it is
only necessary to loosen the set screw, draw out the driving wheel spindle and reverse
the driving wheel, the driving wheel is then again secured by pussing the driving
spindle through it and the lower bearings and screwing up the set screw so as to fix
it on the spinde and the teeth of the driving wheel will then gear properly into those
of the smaller of the two pinions upon the blower spindle, the said long boss shoulder-
ing the post of the machine; in this manner the speed of the fan or blower can be
changed in a very simple and expeditious manner.
For working or giving motion to the bottom screen or sieve I make use of a crank
and rod driven from the blower spindle and acting upon a cross rod under the said
screen or sieve, the connecting rod which works the cross rod is provided with two
holes for connecting the same to the cross rod, the top hole being for use when the
ordinary speed is required and the bottom hole when the quicker motion is required;

page_text: the cross rod working below the screen or sieve is fitted with an adjustable hammer or
knocker by these means the shock and the motion imparted to the said sieve or screen
can be regulated at will.
For raising or lowering the back part of the shoe or back riddle box of the machine,
the said shoe is suspended upon wooden springs the top ends of which are secured to
the hanger brackets on each side by means of simple notched racks; by loosening the
bolt by which the said two notched racks are held together the shoe or riddle box can
be shifted up or down and secured at any required angle by again tightening the bolt
on each side in the said racks.

page_text: Seeds, and the Like.
I, CHARLES EDWARD MUMFORD, of Bury St. Edmunds, in the county of Suffolk,
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 invention relates to improvements in machines for dressing and winnowing
grain, seeds, and the like, whereby the speed of the fan or blower can be altered by
simply adjusting the driving wheel, and motion is communicated to the bottom screen
or sieve, and the back part of the shoe or back riddle box is raised and lowered in a
better manner than hitherto.
In carrying out my invention the blower spindle is fitted with a double spur pinion
instead of a single one as has been the case with dressing machines and winnowers as
hitherto constructed. The post and bracket which carry the spindle upon which the
driving wheel is hung are each fitted with two bush bearings; when the fan is required
to be driven at the ordinary or usual speed the top bearing is employed which causes
the driving wheel to gear with the larger of the pinions upon the blower spindle; the
said driving wheel is fastened upon its spindle by means of a set screw passing through
a long boss for the purpose of keeping the said wheel in position when driving the fan
at either rate of speed. When the fast speed is required it is only necessary to loosen
the set screw, draw out the driving wheel spindle and reverse the driving wheel; the
driving wheel is then again secured by passing the driving spindle through it and the
lower bearings and screwing up the set screw so as to fix it on the spindle and the
teeth of the driving wheel will then gear properly into those of the smaller of the two
pinions upon the blower spindle, the said long boss shouldering the post of the
machine; in this manner the speed of the fan or blower can be changed in a very
simple and expeditious manner.
For working or giving motion to the bottom screen or sieve I make use of a crank
and rod driven from the blower spindle and acting upon a cross rod under the said
screen or sieve; the connecting rod which works the cross rod is provided with two
holes for connecting the same to the cross rod, the top hole. being for use when the
ordinary speed is required, and the bottom hole when the quicker motion is required;
the cross rod working below the screen or sieve is fitted with an adjustable hammer or
knocker; by these means the shock and the motion imparted to the said sieve or
screen can be regulated at will.
For raising or lowering the back part of the shoe or back riddle box of the machine
the said shoe is suspended upon wooden springs, the top ends of which are secured to
the hanger brackets on each side by means of simple notched racks; by loosening the
bolt by which the said two notched racks are held together the shoe or riddle box can
be shifted up or down and secured at any required angle by again tightening the bolt
on each side in the said racks.
In order to enable my invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawings in which figures 1 and 2 are
elevations of the opposite sides of a machine, for dressing and winnowing grain, seeds

page_text: and the like, constructed according to my invention; figure 3 is an end elevation of
part of the same; figures 4 and 5 are a front elevation and an edge view respectively,
drawn to a larger scale, of the adjustable gearing of my improved machine; figure 6
is a detached plan view of the cross shaft and arms by which the rear or upper end of
the bottom screen or sieve is supported and which may be adjusted to regulate the fall
of the said screen or sieve. Similar letters of reference indicate similar parts through-
out the drawings.
a, is the blower spindle and 6, 6', is the double pinion with which I fit the blower
spindle a, instead of with a single pinion as hitherto; the pinion b, b', is keyed or
otherwise suitably secured upon the said spindle a; c, is the post and d, is the bracket
secured to such post for supporting the spindle e, and one end of the spindle a. ff, are
the two bush bearings in one of which the spindle e, of the driving wheel g, is placed
according to the speed at which it is desired to rotate the blower and its spindle a.
h, is a bush bearing fitted into the bracket d, for supporting the outeriend of the blower
spindle a. i, is the set screw which passes through the elongated boss j, and by means
of which the driving wheel g, is secured upon the spindle e, this spindle being
preferably recessed so as to receive the ond of the set screw i. k, is a squared portion
of the spindle e, for admitting of a winch handle or its equivalent (not represented
upon the accompanying drawings) being applied thereto for operating the machine.
1, is the bottom screen or sieve and m, is the crank which is rigidly secured upon
the end of the shaft a, for vibrating the screen or sieve l; n, is the connecting rod by
means of which motion is transmitted from the crank m, to the screen or sieve 1; o, is
the cross rod one end of which is pivotted at p, to the lower part of the post ; 7, 9, are
the two holos formed in the connecting rod n, with one of which holes the free end
of the cross rod 0, is caused to engage, according to the extent to which it is desired
to vibrate the screen or sieve 1, and in which holes the end of the rod o, is retained by
means of a split pin o², or the equivalent thereof; r, is the adjustable hammer or
knocker which may advantageously consist of a set screw, as shewn, or its equivalent;
8, is a lock nut by which the set screw r, can be secured in any position into which it
has previously been moved; t, is a metal bracket secured to the underside of the
screen, to receive the blows of the hammer r; u, is a shaft, supported and capable of
being partially rotated, in the sides ", ", of the machine; and w, w, are two arms
rigidly secured thereto; x, is a rod which is secured in the free ends of the arms w, w,
as clearly shown in figure 6, and upon which rod the upper end of the bottom screen
or sieve 7, is pivotted by means of brackets y; 2, is a hand wheel which is rigidly
secured upon one end of the shaft u, and a', is a thumb-screw which passes through
the same and engages with any one of a series of recesses or holes formed in a
quadrant or plate c', (figure 3) which plate is secured upon the side of the machine.
11
d', d', are the wooden springs upon which the shoe or back riddle box e', is
suspended;,, aro brackets secured to the shoe e', to which brackets the lower
ends of the springs d', d', are fastened by means of bolts and nuts g', y'; h¹, h¹, are the
notched racks fitted on the upper ends of the springs d¹, d', and engaging with the
correspondingly notched racks h2, h3, formed on the rigid hanger brackets ', ' ; )', j'³,
are bolts and nuts, the said bolts passing through slots, in the brackets, for
allowing the shoe or back riddle box e', to be raised or lowered and for clamping the
racks, and h², together after the same have been so adjusted; k³, is a connecting
rod, one end of which is coupled to the crank m, its other end being coupled to the
arm, of the vertical shaft m³.
n', n', are brackets secured to the side of the machine for supporting the shaft m
o', is a second arm formed on the shaft m', and coupled to one end of the short link p',
as shewn clearly at figure 3.
q', is a bracket secured to the side of the shoe or back riddle box e', and carrying
the pin, upon which the inner end of the link p', is pivotted, the said link p³, for this
purpose passing through an opening s¹, to the inside of the casing v.
t, is a bar secured by the bolts u', u', to the front end of the shoe or back riddle
box e; v, (figures 1 and 2) is a bracket secured to the cross rail 20³, and carrying
the pin a, upon which the forward end of the bar t¹, is pivotted.

page_text: The operation of the machine is as follows:-
If the fan or blower is required to be rotated at the slower rate of speed the spindle
e, is placed in the upper bearings, f, the elongated boss j, being then at the outer side
of the driving wheel g, which is consequently caused to engage with the larger part b,
of the double pinion. The cross rod o, at this time is connected to the rod n, through
the upper one of the holes q, y. If it be desired to adjust the machine so that it shall
operate at an increased rate of speed the set screw i, is released and the spindle e, is
drawn end wise out from its bearings f. f. The driving wheel g, is then also removed
from within the bracket d, and replaced therein after having been reversed so that the
elongated boss j, is at its inner side. The teeth of the wheel y, are then placed into
gear with the small part of the double pinion and the spindle e, is passed through
the lower bush bearings f, f, and through the boss of the wheel g, in which it is then
secured by means of the set screw i. The cross rod o, is then released from the upper
one of the holes 4, 7, and engaged with the lower hole.
As the crank shaft a, is rotated it will, by means of the crank m, and connecting
rod n, cause the cross rod o, to be reciprocated on its pivot p, and a knocking or
kicking action to be given by the screw r, against the bracket t, on the screen or
sieve, the inclination of the screen or sieve being regulated by adjusting the arms w,
in the manner hereinbefore described. At the same time the shoe or back riddle box
e' will have a sideways vibratory motion given to it by means of the connecting rod k²,
arms ', and o¹, link p¹, and their attachments.
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:
1. The use in a machine for dressing and winnowing grain, seeds, and the like, of a
double pinion fixed on the blower spindle in combination with a reversible driving
wheel and bearings arranged at different elevations for receiving the spindle of the
said wheel substantially as and for the purpose set forth.
2. In a machine for dressing and winnowing grain, seeds, and the like, the combi-
nation with a pivotted cross rod provided with an adjustable hammer or knocker for
operating the bottom screw or sieve and arranged to be operated from the blower
spindle, of a crank and connecting rod having two bearings for the said cross rod
for regulating the shock and the motion imparted to the screen or sieve substantially
as hereinbefore described and illustrated in the accompanying drawings.
3. Suspending the shoe or back riddle box of a dressing and winnowing machine
upon wooden springs, the top ends of which are adjustably secured by means of
notched and slotted racks, substantially as and for the purposes herein-before described
and illustrated in the accompanying drawings.
4. The combination of parts forming the improved machine for dressing and
winnowing grain, seeds, and the like substantially as hereinbefore described and
represented in the accompanying drawings.
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.