Improvements in Traction Engines and other Road Locomotives.
Year: 1891

page_text: Date of Application, 1st May, 1891
Complete Specification Left, 1st Feb., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Traction Engines and other Road Locomotives.
I, ARTHUR SAMUEL FRANCIS ROBINSON of Wantage in the County of Berks,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to the construction of traction engines and other road
locomotives.
At the hinder part of the engine I provide a gear frame which is able to move
vertically in guides upon horn plates projecting rearwards from the sides of the
fire box.
This frame carries the axle of the main road wheels, an intermediate shaft or
intermediate shafts and the crank shaft. These are parallel the one to the other.
On the crank shaft are speed pinions which can be slidden in and out of gear with
tooth wheels on the intermediate shaft and on the intermediate shaft is a pinion or
pinions for driving the road wheels. From the underside of the gear frame a
horizontal cross bar fixed to the horn plates is hung by springs and links.
Two
or more volute springs may be employed or a single spring composed of flat blades
may be used.
Dated this 1st day of Mar. 1001
COMPLETE SPECIFICATION.
Improvements in Traction Engines and other Road Locomotives.
I, ARTHUR SAMUEL FRANCIS ROBINSON, of Wantage, in the County of Berks,
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 the construction of traction engines and other road
locomotives.
At the hinder part of the engine I provide a gear frame which is able to move
vertically in guides upon horn plates projecting rearwards from the sides of the
fire box.
This frame carries the axle of the main road wheels, an intermediate shaft or
intermediate shafts and the crank shaft. These are parallel the one to the other.
On the crank shaft are speed pinions which can be slidden in and out of gear with
tooth wheels on the intermediate shaft and on the intermediate shaft is a pinion or
pinions for driving the road wheels. From the underside of the gear frame a
horizontal cross bar fixed to the horn plates is hung by springs and links. Two or
more volute springs may be employed or a single spring composed of flat blades
may be used.
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation with parts removed of the rear end of a traction
engine or road locomotive in accordance with my invention.
Figure 2 is a rear elevation partly in section, and
Figure 3 is a plan partly in section of a portion of the engine.
a a are the horn plates projecting rearwards from the fire box of the engine.
a¹ a¹ are guides fixed to the horn plates. b is a gear frame of which the two sides

page_text: are connected by tubular castings and the cross plate 62. The frame b is able
to slide up and down between the horn plates. c is the crank shaft of the engine;
it is carried in bearings upon the frame b.
d is the axle of the main road wheels, it passes through the lower casting b¹.
Upon the axle there is a spur wheel e which is made fast with the road wheel. fis
an intermediate axis, it is carried in the upper casting b' and carries the pinion g
and the spur wheels and i which are all fast together. Up
Upon the crank shaft c there
are two pinions and I which can be slidden along it into and out of gear with
their respective wheels by means of hand levers m which have their fulcra at m¹ m²
on a support attached to one of the horn plates.
nare links jointed at n' n¹ to the underside of the frame b. o is a bar
extending across from one horn plate to the other and firmly connecting them at
their lower and rearward corners. The links n n pass down through the bar o,
they receive nuts n² n² at their lower ends and between the nuts and the bar o are
the coiled springs ³. In this way the body of the engine is supported in rear and
is carried upon springs which are interposed between it and the gear frame. The
angling of the connecting rod p allows the necessary freedom for the play of the
springs.
It will be seen that the gear frame is very rigidly constructed by uniting the
main bearings as well as the intermediate in tubes with flanges at each end and by
bolting these flanges and the cross plate so that the frame acts as a solid mass and
cannot rack or twist. The perfect parallelism of the movement of the gear frame
between the horn plates is also ensured. The provision of a gear frame as
described enables gearing to be applied on both sides of the engine if desired.
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 arrangement consisting of the gear frame with the crank shaft,
intermediate axis or axes and the main axle, so mounted as to slide between the
horn plates, which horn plates are supported from the lower part of the gear frame
by links and springs, the whole substantially as described.
2. The application of springs to traction engines and other road locomotives in
the manner represented by the annexed drawings.
Dated this 1st day of February 1892.
CARPMAEL & Co.,
Agents for the Applicant.