IMPROVEMENTS IN THE GEARING OF TRACTION ENGINES AND ENGINES OF LIKE NATURE
Year: 1884

page_text: "
I ALFRED GREIG of the Steam Plough Works Leeds in the County of York
Engineer do hereby declare the nature of my invention for IMPROVEMENTS IN
THE GEARING OF TRACTION ENGINES AND ENGINES OF LIKE NATURE to be as
follows:-
"
This Invention has for its object improvements in the gearing of traction engines
and engines of like nature.
These engines are at present in some cases furnished with springs and provision
is made to admit of the play of the springs without interfering with the proper
action of the spur wheels which transmit the movement of the crank shaft of the
engine to the road wheels.
For this purpose in various ways the intermediate shaft or one of the intermediate
shafts carrying gear wheels between the crank shaft and the axle has been made
moveable.
The arrangements also have in some cases been such as to ensure an equal
deflection of the springs on the two sides of the engine.
The methods beretofore in use for these purposes are however inconvenient and
are open to objections.
According to this Invention the bearings of an intermediate shaft are carried in
a frame which can turn around an horizontal axis carried by the horn plates and
this frame is connected by links one on either side with the axle boxes of the main
wheels. Thus the axle and intermediate shaft necessarily remain parallel and at a
constant distance apart.
The centre about which the frame carrying the intermediate axis is moveable is
in the same plane with the moveable intermediate shaft and the crank shaft or
other intermediate shaft with which it is geared when the moveable intermediate
shaft is in its mean position.
The play of the springs causes a departure from this mean position which results
in a slight approximation of the wheels which gear together but this is so little as
in no way to interfere with the proper working of the machine.
CARPMAEL & Co.,
Agents for the Applicant.

page_text: I, ALFRED GREIG of the Steam Plough Works Leeds in the County of York,
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
THE GEARING OF TRACTION ENGINES AND ENGINES OF LIKE NATURE" 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 gearing of traction engines
and engines of like nature.
These engines are at present in some cases furnished with springs and provision
is made to admit of the play of the springs without interfering with the proper
action of the spur wheels which transmit the movement of the crank shaft of the
engine to the road wheels.
For this purpose in various ways the intermediate shaft or one of the intermediate
shafts carrying gear wheels between the crank shaft and the axle has been made
moveable.
The arrangements also have in some cases been such as to ensure an equal
deflection of the springs on the two sides of the engine.
The methods heretofore in use for these purposes are however inconvenient and
are open to objections.
According to this invention the bearings of an intermediate shaft are carried in
a frame which can turn around an horizontal axis carried by the horn plates and
this frame is connected by links one on either side with the axle boxes of the main
wheels. Thus the axle and intermediate shaft necessarily remain parallel and at a
constant distance apart.
The centre about which the frame carrying the intermediate axis is moveable is
in the same plane with the moveable intermediate shaft and with the crank shaft
or other intermediate shaft with which it is geared when the moveable intermediate
shaft is in its mean position.
The play of the springs causes a departure from this mean position which results
in a slight approximation of the wheels which gear together but this is so little as
in no way to interfere with the proper working of the machine.
Figure 1 shews a side elevation Figure 2 a plan view and Figure an end view
partly in section of part of a traction engine having driving gear arranged as above
described.
A is the axle of the main wheels-B B its axle boxes-C C the links by which
the axle boxes are connected to a horizontal shaft D which passes across the
frame E and at one end projects beyond it to carry the intermediate wheel by
which the toothed wheel on the axle of the driving wheels is to be driven.
F is the axis upon which the frame E swings and which is carried by the horn
plates. This axis is as shewn in a plane passing through the shaft D when in its
mean position and through the secoud motion shaft G which carries the toothed
wheels by which motion is transmitted to the intermediate wheel on the shaft D.
The second motion shaft G may as indicated in Figure 1 be driven at either one
or other of two speeds from the crank shaft H of the engine as is usual.

page_text: The second motion shaft G has fast upon it a toothed pinion I which gears with
a toothed wheel J on the third motion shaft D-this wheel has fast with it a
toothed pinion K which gears with the toothed wheel L on the axle of the driving
wheels.
It is not essential to use a third motion shaft as shown in the drawing-there
might be only two shafts in the gearing and the second shaft be carried in a
frame turning on axes situated in a plane passing through this shaft and the crank
shaft.
The way in which the frame of the engine is as heretofore supported upon
springs carried below the axle boxes is clearly seen in Figure 3.
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.-Mounting the axis of the intermediate wheels J K in a frame which can turn
on an axis in the position hereinbefore mentioned and which is connected by links
with the axlo boxes of the main wheels.
2. The combination of driving gear for traction engines and ongines of like
nature substantially as herein described and illustrated in the drawing annexed.
11
1700