IMPROVEMENTS IN MOTORS FOR ACTUATING THE CARS UPON ORDINARY TRAMWAYS
Year: 1885

page_text: We THOMAS CHARLTON and JAMES WRIGHT both of 84 Lombard Street in the
City of London Engineers do hereby declare the nature of our Invention for
IMPROVEMENTS IN MOTORS FOR ACTUATING THE CARS UPON ORDINARY TRAMWAYS
to be as follows
-
Hitherto and in general motion has been communicated to the Cars on a
Tramway by animal power, by cable traction, or by locomotive engine which
generating its own motion communicates it directly to the cars, trailing or pushing
them
1
The frequent necessary stoppages of the cars involve a corresponding stoppage
of the engine and causes a serious loss of motor energy
To obviate this we propose to induce motion in the Cars upon Tramways by the
use of two distinct engines or motors
The first of these motors we call the Primary Engine and its function is to
generate the energy or force which is there stored.
The other motor which we call the Secondary engine we-use for the purpose of
transmitting the stored force generated by the first, so as to give motion to the
Cars, or to retard or stop them when in motion
Our primary engine may be of any form and actuated by any of the present
well known means we prefer however to use the engine formed and actuated as
described in the specification of our Patent number 1703, dated the 17th day of-
March 1885
The power generated by this engine we use to compress water or any other
liquid or fluid by means of a pump or pumps or rams or other suitable appliances
up to a tension of from 250 lbs to 1000 lbs on the square inch
The water contained in a tank is compressed by the primary engine and stored
in an accumulator mounted upon the frame of the engine carriage
The Secondary motor consists of one two or more cylinders with the requisite valves
passages pistons and piston rods the necessary guide and connecting rods working
upon the ordinary cranked axle of the engine cage and having all the valve
excentric and other gear usual in a locomotive motor
The secondary motor has a passage communicating with the reservoir tank
containing the water or other liquid to be energized, and another passage commu-
nicating with the accumulator tank where the energized liquid is stored and by
TD 037

page_text: opening and closing a valve in the passage lending to the accumulator the
energized water passes to the cylinder of the secondary motor and by means of
its potentiality acts in the usual way upon the pistons and communicates motion
through the crank axle or directly to its own wheels and from thence to the
wheels of the cais
The water after producing the required motion passes from the cylinder into the
supply tank from which it is forced back into the accumulator
The break power for arresting the motion of the cars is actuated in a similar
way by the compressed water by well known means and methods
It will be seen that by this arrangement the primary engine from the com-
mencement of the journey till its completion need never cease to work, the energy
which it constantly generates being continuously transmitted to and absorbed by
the liquid stored in the accumulator
The stored energy is given off to the secondary motor simply as it is required
for diving the cars and when a stoppage takes place the supply of energized
liquid is cut off from the secondary motor, or it may be used to retard or stop the
existing motor by means of the breaks, the primary engine duly regulated by the
governor in the usual way continues in constant action its function generating and
storing energy and imparting it to the liquid in the accumulator
The engines may be mounted in a portion of the tram car, or they may have
separate carriages with suitable attachments or draw bars to connect them to the
cai and in general those will be preferable in streets with sharp curves.
100K
JAMES WRIGHT & Co,
Agents to the Petitioners
COMPLETE SPECIFICATION
Improvements in Motors for Actuating the Cars upon Ordinary
Tramways
We THOMAS CHARLTON and JAMES WRIGHT both of 84 Lombard Street in the
City of London Engineers do hereby declare the nature of our Invention for 30
IMPROVEMENTS IN MOTORS FOR ACTUATING THE CARS UPON ORDINARY TRAMWAYS
and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement
Hitherto and in general, motion has been communicated to the Cars on a
Tramway by animal power, by cable traction, or by locomotive engine which 3
generating its own motion communicates it directly to the cars trailing or pushing
them

page_text: The frequent necessary stoppages of the cars involve a corresponding stoppage
of the engines, and causes a serious loss of motor energy
To obviate this we propose to induce motion in the Cars upon Tramways by the
use of two distinct engines or motors
The first of these motors we call the primary engine, and its function is to
generate the energy or force, which is then stored
The other motor which we call the secondary engine, we use for the purpose of
transmitting the stored force generated by the first, so as to give motion to the
cars, or to retard or stop them when in motion
Our primary engine may be of any form, and actuated by force generated by
any of the present well known means
The power generated by this engine we use to compress water or any other
liquid by means of a pump or pumps of the same or different capacities, or rams,
or other suitable appliances, up to a tension of from 250 lbs to 1000 lbs
square inch
on the
The water contained in a tank is compressed by the primary engine, and stored
in an accumulator or au vessel, mounted upon the frame of the engine carriage
The secondary motor consists of one two or more cylinders, with the requisite valves
passages pistons, and piston rods the necessary guide and connecting rods working
upon the ordinary cranked axle of the engine carriage and having all the valve
eccentric and other gear, usual in a locomotive motor
The primary motor has a passage communicating with the reservoir tank
containing the water or other liquid to be energised, and continues in constant
action, its function generating and storing energy and imparting it to the liquid in
the accumulators
When it is desired to stop the car, no change takes place in the function of the
primary engine, but it continues in motion ready at once to produce the necessary
water or other liquid pressure, to actuate the secondary engine when required to
be started
The engines may be mounted in a portion of the tram car, or they may have
separate carriages with suitable attachments, or draw-bars to connect them to the
car, and in general, these will be preferable in streets with sharp cuives
In order to show more clearly the different parts of our invention, and in what
the same consists, and how it operates, we append to this specification a sheet of
drawings, which show the arrangement and combination of the different parts
which form a complete locomotive engine, for use on Tramways or like application
It will be seen however that these are all well known mechanical appliances, and
may be modified or substituted by other equally well known apparatus, arranged
so as to act in different ways, but all embodying the principles of our invention,
hence the illustrations must only be considered as one method, showing how these
principles can be carried out, the essentiality of the invention being the use
of two distinct engines, the one of which we call the primary motor, being that
used for generating force which is then transmitted, and stored within another
medium, (water or other liquid) which is thus endowed with a high potentiality,
and which through the action of the secondary motor, is transmitted to and gives
motion to the carriage or carriages themselves
Figure 1 1s & side elevation and Figure 2, a sectional plan of a locomotive,
containing both the primary and secondary engines, having all the working parts,
and transmitting gear of an ordinary locomotive engine a is the cylinder of the
primary engine which may be hydro-carbon gas, electric, or a steam engine the
valve and other gear apparatus is omitted being all well known b is the crank
shaft with the fly wheel, b, c, another crank for the driving pump (d) which
forces water or other simple liquid from the tank at a high pressure into air
vessels, or accumulatois e e, by moving the starting levers g which actuate the
regulating cock 9₁ the compressed water running through the passage n and
passing through the slide valves 22. enters the cylinders h h and actuates the

page_text: pistons inside, which in their turn work the connecting rods coupled to the crank
pins kk on the driving wheels of the engine
When motion in the carriage is not desired the water engine is thrown out
of action by means of the levers g, g which act upon the regulating cock g₁, and
the water instead of entering the accumulator e under pressure, passes through the
pipe into the tank m the exhaust water from the cylinders after actuating
the piston passes off through another pipe (not shown in drawing but placed
under n) connected with the pipe o and from thence to the tank m which supplies
the feed water to the pump d
In order to permit the compressed water to act upon the breaks and regulate or
stop the motion of the carriages the lever p p 18 connected with a 3 waycock k
whose action allows compressed water to pass from the accumulator f, along the
pipes to the cylinder t and forces the piston w (shown in the elevation figure)
down the cylinder t so as to act upon the levers xx and press the break blocks y y
to the periphery of the wheels as soon as the pressure of water is released by the
action of the levers p p and the cock k the spring presses the piston back to
the top of the cylinder and allows the break blocks to fall back from the periphery
of the wheels
Between the two accumulators there is a non return clack valve, whose action,
1s such as to allow the accumulator f always to remain charged with water at the
working pressure and ready for action
Having now particularly described and ascerta ned the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
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When motion 18 intermittant and the body moved, or frequently staited and
stopped, we claim the use of two distinct motors the one we call the primary
motor whose sole & constant function is to generate force and to store it when so
generated in another medium preferably by compressing water, and a secondary
motor whose sole intermittant function is to transmit the force of the energized
or compressed water and convert it into giving motion to the body or carriage to
be moved
Dated in of 1988