Improvements in the Driving Gear of Traction and other Self Moving Engines.
Year: 1887

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Driving Gear of Traction and other
Self Moving Engines.
We, ROBERT HENRY FOWLER, RICHARD HOLGATE SHAW and THOMAS BENSTEAD
all of The Steam Plough Works Leeds in the County of York Engineers do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements in the driving gear of traction and
other engines and is applicable especially to engines carried on springs.
The main spur driving wheel revolves loose on a circular boss on the body of the
engine and through this boss the driving axle passes; the circular boss or bearing
forming a slide for the axle box. This spur wheel carries a gimbal frame by means
of pivots or trunnions which are able to slide longitudinally in their bearings. The
gimbal frame in like manner carries, by pivots or trunnions at right angles to its own,
an inner frame or driving plate which communicates motion to the main road wheels.
The pivots or trunnions of the driving plate serve as axes on which bevilled pinions
are carried and these pinions gear with two bevilled wheels the one fast on the road
wheel and the other on the axle. The arrangement forms a differential gear which
whilst allowing the driving wheels on the two sides of the engine to revolve at
different speeds when the engine turns a corner, allows free play to the springs and
also allows the axle to incline in following the irregularities of the road without
deranging the gear.
Sometimes we dispense with the gimbal frame, we then provide a ring of internal
teeth on the main spur driving wheel and we have upon the axle and able to turn
freely about it a toothed wheel gearing on one side only with the ring of internal
teeth. On this toothed wheel we mount radial axes carrying bevilled pinions gearing
with bevilled wheels fast the one on the road wheel and the other on the axle as
before.
Tad this 20th day of January 1887

page_text: Self Moving Engines.
We, ROBERT HENRY FOWLER, RICHARD HOLGATE SHAW, and THOMAS BENSTEAD,
all of The Steam Plough Works, Leeds, in the County of York, Engineers, 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 improvements in the driving gear of traction and
other engines and is applicable especially to engines carried on springs.
The main spur driving wheel revolves loose on a circular boss on the body of the
engine and through this boss the driving axle passes; the circular boss or bearing
forming a slide for the axle box. This spur wheel carries a gimbal frame by means
of pivots or trunnions which are able to slide longitudinally in their bearings. The
gimbal frame in like manner carries, by pivots or trunnions at right angles to its own,
an inner frame or driving plate which communicates motion to the main road wheels.
The pivots or trunnions of the driving plate serve as axes on which bevilled pinions
are carried and these pinions gear with two bevilled wheels the one fast on the road
wheel and the other on the axle. The arrangement forms a differential gear which
whilst allowing the driving wheels on the two sides of the engine to revolve at
different speeds when the engine turns a corner, allows free play to the springs and
also allows the axle to incline in following the irregularities of the road without
deranging the gear.
Sometimes we dispense with the gimbal frame, we then provide a ring of internal
teeth on the main spur driving wheel and we have upon the axle and able to turn
freely about it a toothed wheel gearing on one side only with the ring of internal
teeth. On this toothed wheel we mount radial axes carrying bevilled pinions gearing
with bevilled wheels fast the one on the road wheel and the other on the axle as
before.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical section showing the driving gear and other parts of a traction
engine.
Figure 2 is an elevation and Figure 3 is a plan of part of the gear.
Figure 4 is a part section and Figure 5 is an elevation of another arrangement.
In Figure 1a is the road wheel, it is mounted so that it is free to turn on the axle b.
c is the axle box it is able to slide up and down in guides formed within the circular
boss d on the engine frame; or rather the boss d slides upon the axle box to permit
of the play of the springs by which the body of the engine is carried. e is a link
connecting the axle box with the spring. f is the main spur driving wheel, it is
driven from the engine by intermediate gear as the drawing indicates. I is a gimbal
frame which the wheel carries. The trunnions g₁ g' of the gimbal frame are held
in bearings on the wheel and they are able to slide in these bearings the distance
which the play of the springs requires. The gimbal frame carries within it the driving
plate by trunnions with which the driving plate is provided so that the driving
plate is carried round with the wheelf. The driving plate has holes in it at h² h² to

page_text: The
receive a driving pin which also passes through the hole a' in the wheel a.
trunnions have bevilled pinions ii so mounted upon them that the pinions can
rotate freely. The trunnions h¹ can slide in their bearings in the gimbal frame as far
as is necessary to admit of the play of the springs. The pinions ii gear with the
bevelled wheel on the wheel a and with another wheel fast on the axle b; thus
the axle is driven and the road wheel on the other side of the engine is fast upon it.
It will be seen that in the upper part of Figure 1 the section is taken through the
bearing of the gimbal frame which carries the trunnion of the driving plate; in
the lower part of the same figure it is taken through the bearing in the wheel which
holds the trunnion of the gimbal frame.
In the mechanism shown by the Figures 4 and 5 there is the same arrangement of
bevelled pinions i gearing with bevilled wheels k and but the pinions ii in this
case are not carried by a gimbal frame but by a toothed wheel m which is free to
revolve on the boss of the wheel 1. The main spur driving wheel in this case is
provided with an internal ring of teeth fand with these the wheel m gears on one
side so that the main spur driving wheel carries the wheel m round with it and so the
road wheels are driven in such a way as to admit of their rotating at different speeds
and the wheel whilst remaining in gear with the wheel m is able to play up and
down over it to the extent which the yielding of the springs renders necessary.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
1. Driving apparatus substantially as described for a self moving engine such as
admits of the road wheels being driven at different speeds and of the body of the
engine rising and falling with the play of the springs; such gear consisting of a main
spur driving wheel mounted on a circular boss on the body of the engine through
which boss the axle passes; bevilled wheels one on a road wheel and the other on the
axle; bevilled pinions between the bevilled wheels and gearing with both of them;
a frame carrying these pinions and gear connecting this frame with the main spur
driving wheel in such manner that the main spur driving wheel carries the frame and
pinions round with it whilst allowing freedom for the play of the springs.
2. Driving apparatus substantially as described and consisting of a main spur
driving wheel mounted on a circular boss on the body of the engine, through which
boss the axle passes; bevilled wheels, one on a road wheel and the other on the axle ;
bevilled pinions between the bevilled wheels and gearing with both of them; and a
gimbal frame carrying these pinions and mounted on the main spur driving wheel in
such manner that the main spur driving wheel carries the frame and pinions round
with it whilst allowing freedom for the play of the springs.
3. Driving apparatus substantially as described and consisting of a main spur
driving wheel mounted on a circular boss on the body of the engine through which
boss the axle passes; bevilled wheels, one on a road wheel and the other on the axle ;
bevilled pinions between the bevilled wheels and gearing with both of them; and a
wheel frame carrying these pinions and provided with teeth on its periphery engaging
with internal teeth on the main spur driving wheel so that the said wheel carries the
frame and pinions round with it whilst allowing freedom for the play of the springs.
4. Driving gear for self moving engines substantially as described and illustrated
by the annexed drawings.