Improvements in the Means or Apparatus for Transmitting Rotary Motion from One Shaft to Another Shaft Revolving at Right Angles thereto, and the Adaptation of the same to a Cylindrical Sorting Machine or other similar Apparatus.
Year: 1892

page_text: Date of Application, 12th Mar., 1892-Accepted, 16th Apr., 1892.
Improvements in the Means or Apparatus for Transmitting Rotary
Motion from One Shaft to Another Shaft Revolving at Right
Angles thereto, and the Adaptation of the same to a Cylindrical
Sorting Machine or other similar Apparatus.
I, SAMUEL CLELAND DAVIDSON of Sirocco Works, Belfast, Ireland, Merchant,
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 reference to transmitting rotary motion from one shaft to
another shaft revolving at right angles thereto and it consists in transmitting the
rotary motion from a driving shaft revolving in fixed bearings by gearing arranged
as hereinafter described to a driven shaft working tangentially and at right angles
to the driving shaft, and revolving in movable bearings, one of which is attached to
the driving shaft, and the other which supports the opposite end of the driven.
shaft, in any tangential position around and at right angles to the driving shaft.
The improved gearing or apparatus allows of the driven shaft being moved
around the driving shaft into any tangential position at right angles to said driving
shaft without the driving action of the gearing being in the least degree deranged
by such altered positions of the driven shaft.
The invention is specially applicable to sorting or drying machines of the class
in which a rotating cylinder is 'mounted on a driven shaft as an axle, and which
may require its angle of inclination to be altered up or down to vary the speed.at
which substances fed in at the upper end may without alteration to the rotating
speed of the cylinder, traverse the cylinder to the lower end, without the driving
action of the gearing transmitting the motion from the driving shaft to the
cylinder axle, being in any way deranged or affected thereby, or the gearing or
belts giving motion to the driving shaft being thrown out or off the driving
pulleys.
In the method described in a previous Specification No. 6952 of 1891 for
transmitting the rotary motion from the driving to the driven shaft, the weight of
the latter, with the cylinder upon it, at the end where it attaches and gears to the
driving shaft at direct right angles (not tangentially) to same, produces an unequal
or twisting strain in the bearing supporting it, and to avoid this twisting strain the
driven shaft is in accordance with the present invention carried tangentially past
the driving shaft, so that the weight of the driven shaft may be directly supported
by the driving shaft, without there being any twisting strain in the bearing in
which the driven shaft revolves.
The present invention consists in mounting on the driving shaft a casting with
bearings in it to fit said driving shaft, so that it may freely revolve in same, and
with another bearing in it to carry the driven shaft tangentially and at right
angles to, and either above or below the driving shaft, so as to be quite clear of
the bearing in which the driving shaft revolves. According to one method of
constructing the gearing, the driving shaft is fitted with a bevelled pinion which
engages the teeth of a bevel wheel which revolves upon a stud fitted to the above
mentioned casting, and which wheel has ordinary toothed gearing either around.its
periphery or on a separate larger or smaller diameter wheel attached to it, which
engages a toothed wheel keyed on to the driven shaft, the opposite end of which
shaft is carried in any suitable bearing which will be self adjusting to the line.of
the shaft, if same be raised or lowered. Or according to another alternative
method of constructing the gearing the driven shaft is fitted with a worm wheel
which is driven direct by a worm on the driving shaft, the worm and worm wheel.

page_text: cach relatively rotating between the bearings for the driving and driven shafts in
the casting carrying the gearing. Figure 12 of the annexed drawings sufficiently
illustrates this alternative arrangement without further explanation and it is obvious
that the worm wheel on the driven shaft may if desired be on the upper side of the
driving shaft.
The above described arrangements of gearing give rotating motion to the driven.
shaft in any tangential position in which it may be placed at right angles to the
driving shaft.
When the driven shaft is to rotate slower than the driving shaft the gearing is
arranged as shewn in Figures 1 to 5, but by altering the relative diameters of the
driving and driven toothed or bevelled wheels, the speed of the driven shaft can
be varied or increased as may be required, and an arrangement of the gearing for
this object is indicated in Figures 6 and 7.
Figure 1 is a front elevation shewing the gearing fitted on the driving and
driven shafts and the driving shaft carried in fixed bearings ou each side of the
gearing.
Figure 2 is a back elevation of Figure 1.
Figure 3 is an end elevation of Figure 1, and shews the outer end of the driven
shaft carried in a self adjusting bearing mounted on a rod, having adjustable
movement up and down in a clamp or socket; and it is obvious that the driving
shaft may project to the opposite side of the gearing to that illustrated in Figure 3
and be similarly carried in an adjustable bearing at its outer end on that side and
also that said bearing may be applied as a hanging one with its adjusting clamp or
socket above the bearing.
Figure 4 is a plan of the gearing.
Figure 5 is a plan corresponding to part of Figure 4 but with the gearing
wheels removed, and indicated by dotted lines, to better show the way they are
attached to the casting containing the bearings for the shafts.
Figures 6 and 7 are end elevations corresponding to Figures 1 and 2, but
illustrating how the gearing may be arranged so as to rotate the driven shaft at
the same or higher speed than the driving shaft.
Figures 8, 9, 10 and 11, show the application of the gearing to a cylindrical
sorting or sifting machine, respectively in longitudinal elevation, plan, and end
elevation of the upper and lower ends of the cylinder.
Figure 12 is an alternative arrangement of the gearing and movable casting
to which the gearing is attached, worked with worm and worm wheel direct off
the driving to the driven shaft. This arrangement is suitable when the driven
shaft requires to be worked at a very much lower rate than that of the driving
shaft.
The letters used to indicate the various parts are the same in each illustration,
and are as follows:-
A. The driving shaft.
B. Fixed bearings carrying driving shaft.
C. Casting containing the tangential bearings for the driving and driven
shafts.
D. Bevelled pinion on driving shaft.
E. Bevelled wheel driven by pinion D, and carried on stud screwed in the
casting C.
F. Toothed gearing on back of. bevel wheel E in Figures 1 and 2 and on
periphery of saine in Figures 6 and 7.
G. Toothed wheel fitted on the driven shaft.
H. Driven shaft.
J. Self-adjusting bearing carried on top of rod K.
K. Vertical rod supporting self-adjusting bearing.
L. Clamp or socket for adjusting the height of the rod K.
M. Rotating cylinder mounted on the driven shaft H.
N. Pulleys for rotating the driving shaft.

page_text: P. Framing for carrying the gearing, shafting, and sorting cylinder.
Q. Worm fixed on driving shaft A, and gearing into worm wheel R in
Figure 12.
R. Worm wheel on the driven shaft H.
Having now particularly described and ascertained the nature of my said inven-.
tion and in what manner the same is to be performed, 1 declare that what I
claim is,
1. The arrangement of geared wheels and bearings substantially as hereinbefore.
described and represented in the accompanying drawings, whereby rotary motion
from a driving shaft is transmitted to a driven shaft working tangentially and at
right angles to, and either over or under, the driving shaft, in such a manner that
the said driven shaft will in any tangential position around the driving shaft, continue.
its rotary motion without deranging or affecting the gearing.
2. The combination in a cylindrical sorting or sifting machine or other similar
apparatus, of the hereinbefore described gearing for rotating the cylinder of same,
with an adjustable bearing at the opposite end of the cylinder for raising or
lowering that end of the cylinder as required, all substantially as hereinbefore-
described and represented in the accompanying drawings.
Dated this 10th day of March 1892.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent..