Improvements in and connected with the Generating and Trans- mission of Power for Driving Tramway Carriages and other Road Vehicles, and for other purposes.
Year: 1897

page_text: Date of Application, 1st Feb., 1897
Complete Specification Left, 1st Dec., 1897-Accepted, 1st Feb., 1898
PROVISIONAL SPECITIVATION.
Improvements in and connected with the Generating and Trans-
mission of Power for Driving Tramway Carriages and other Road
Vehicles, and for other purposes.
I, CHARLES M. Johnson, of Broad Street House, Old Broad Street, in the City
of London, Engineer, do hereby declare the nature of this invention to be as
follows;-
-
My invention refers to an improved method of driving tramway carriages,
motor cars, and other vehicles and is also applicable for other purposes where it
is advantageous that the power should be more under the control of the engineer
or driver than is the case where an oil or other explosive engine is used coupled
direct on to the part or machine it is intended to drive.
Under ordinary circumstances it is difficult to regulate a gas or other explosive
motor and unless there be gearing which practically amounts to reducing the
speed given off it is impossible to obtain more than a normal effect or in other
words obtain more power, at any time.
Now according to my invention I use an oil or other explosive motor to constantly
compress air or other fluid into a strong metal reservoir or cylinder and this
compressed air is used to drive an engine of any suitable construction from which
the power is to be taken off. If the power is only required intermittently it is
evident that a comparatively small oil or similar engine will be sufficient to keep
up the necessary pressure in the reservoir.
When it is desired to stop in the case of a vehicle, or when lowering in the case
of hoisting gear or otherwise when the power is not required and where there is
some inertia or weight to be overcome I may connect by means of a clutch or the
like an air pump which operates to pump air or the like into the reservoir which
air is then available for power or driving purposes.
COMPLETE SPECIFICATION.
Improvements in and connected with the Generating and Trans-
mission of Power for Driving Tramway Carriages and other Road
Vehicles, and for other purposes.
I, CHARLES M. JOHNSON, of Broad Street House, Old Broad Street, in the City
of London, Engineer, do hereby declare the nature of this invention, and in what
[Prine R71

page_text: manner the same is to be performed, to be particularly described and ascertained in
and by the following statement:—
My invention refers to an improved method of driving tramway carriages,
motor cars, and other vehicles and is also applicable for other purposes, where it is
advantageous that the power should be more under the control of the engineer 5
or driver than is the case where an oil or other explosive engine is used coupled
direct on to the part or machine it is intended to drive.
Under ordinary circumstances it is difficult to regulate a gas or other explosive
motor and unless there be gearing which practically amounts to reducing the speed
given off it is impossible to obtain more than a normal effect or in other words 1
obtain more power at any time.
Now according to my invention I use an oil or other explosive motor to constantly
compress air or other fluid at every working stroke into a strong metal reservoir
or cylinder and this compressed air is used to drive an engine of any suitable.
construction from which the power is to be taken off.
If the power is only required intermittently it is evident that a comparatively
small oil or similar engine will be sufficient to keep up the necessary pressure in
the reservoir.
When it is desired to stop, in the case of a vehicle, or when lowering in the case
of hoisting gear or otherwise when the power is not required and where there is 2
some inertia or weight to be overcome I may connect by means of a clutch or the
like an air pump which operates to pump air or the like into the reservoir which air
is then available for power or driving purposes.
Fig. 1 in the accompanying sheet of drawings indicates in plan and in diagram-
matic form one such arrangement as applied to a road vehicle and Fig. 2 is a side 2
elevation thereof.
A is an oil tank and B a vaporiser connected to the two cylinders C₁Cs of an
oil or other explosive motor by means of a pipe. B¹ the pistons of the motor being
connected to the respective cranks D', D of a common crank shaft D. The exhaust
of the motor escapes by pipes B and B into a common pipe B. Between the
two cylinders C¹, C, I arrange an air-compressing cylinder C3 having a piston con-
nected to a third crank D³ on the common crank shaft D said crank D³ being
opposite to or at an angle of 180° with the two cranks D¹, D³.
I do not confine myself to this particular arrangement of an oil or other explosive
motor and an air compressor, as for instance, I may couple such a motor having a
a single cylinder direct to an air compressor the pistons being connected to a single
crank.
But whatever arrangement of cylinders I may find most advantageous the air
under compression is forced into a reservoir such as for instance the tubular
frame K and always forms a cushion to take up the vibration arising in the
explosion cylinder it being understood that air is compressed at every revolution,
if the motor works with an impulse at every revolution, and at every other revo-
lution only, if the motor works on the "Otto" principle.
The explosive charges in the cylinders C, C, may be fired by an electric spark
from a battery E or in any other convenient or well known manner.
F is an engine of any suitable_construction capable of being driven in either
direction by compressed air from the reservoir K and for the purpose of expanding
the air acting as the motive fluid the cylinders of the said engine are heated in any
convenient manner as is usual with compressed air motors, but in order to do
away with a separate source of heat I pass the hot gases exhausted by the oil engine by
means of the pipe B through a jacket F1 extending wholly or partly round the
cylinders of the said engine F. The engine F is provided with a crank shaft G
suitably connected by gearing chains or the like to the axle H of the road driving
wheels.
J is a tank for holding water for circulation through the water jacket of the cil
or other explosive motor.
As a brake to stop the vehicle and also as an additional means of storing ap

page_text: power when stopping or running down hill I may arrange an auxiliary air com-
pressor L either connecting as shewn with the crank shaft G or mounted separately
and connected to the driving axle H by means of gearing and a clutch. When
connected to the crankshaft G a vent under suitable control or other means are
provided from throwing the air compressor into and out of gear.
The whole of the machinery I may mount on the tubular or other suitable
frame K forming a reservoir or reservoirs for the air compressed by the air-com-
pressors and L for driving the air motor I provided with suitable safety and
regulating valves operated from any convenient position by means of handles and
necessary gearing.
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 method of driving applicable to tramway carriages, motor cars and other
purposes consisting in using an oil or other explosive motor to compress air into a
reservoir and using this compressed air as required to drive a fluid pressure engine
from which the power is taken off with or without an auxiliary compressor or pump
substantially as set forth.
2. The construction of apparatus for driving applicable to a tramway carriage,
motor car, or other purpose consisting of an oil engine or the like, a compressing
engine or pump, a reservoir and fluid pressure engine with means for heating the
cylinders thereof all arranged and operating substantially as set forth.
3. The construction of apparatus for driving applicable to a tramway carriage,
motor car, or other purpose consisting of an oil engine or the like a compressing
engine or pump, a reservoir, a fluid pressure engine the cylinders of which are
heated by the exhaust of the oil engine, and an auxiliary compressor or pump all
arranged and operating substantially as described and shown.
4. The construction of motor vehicle shewn on the drawing.
Lated this rnst day от песетрет 1051.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.