Improvements in connection with Motive Power Engines for Driving Tramway Cars and other Vehicles.
Year: 1894

page_text: Date of Application, 15th Aug., 1894
Complete Specification Left, 15th May, 1895-Accepted, 6th July, 1895
PROVISIONAL SPECIFICATION.
Improvements in connection with Motive Power Engines for Driving
Tramway Cars and other Vehicles.
I, Sir EUSTACE FITZMAURICE PIERS, Bart. of 41 Finsbury Pavement in the
City of London Mechanical Engineer do hereby declare the nature of this invention
to be as follows:-
This invention relates to certain improvements upon apparatus for driving
tramway cars and other vehicles for which Letters Patent were granted to me
bearing date as of the 6th day of February 1889 No. 2144 my present invention
consisting of an improved arrangement of the hydraulic engine or engines and the
engine for working the pumps by which water is forced into the hydraulic engine
or engines to effect the driving of the vehicle. The hydraulic engine or engines
is or are carried on a bogie or on bogies upon which the body of the vehicle is
supported and the engine for working the pump is mounted in the body of the
vehicle. The supply pipe or passage for water from the pump to the hydraulic
engine or engines passes through the axis or axes of the bogie or bogies and
through an outer pipe through which the water after acting in the hydraulic engine
or engines returns to the tank from which the pump draws the water. These
pipes are provided with stuffing boxes which permit of the required movements of
the bogie or bogies and between the pump and the hydraulic engine or engines a
valve is or valves are provided by means of which the driver can as desired or
when required cause the water to pass from the pump direct to the tank from
which the said pump is supplied and thereby prevent the water from entering the
hydraulic engines to drive the vehicle.
Dated this 15th day of August 1894.
JOHNSONS & WILLCOX,
Agents.
Improvements in connection with Motive Power Engines for Driving
Tramway Cars and other Vehicles.
I, Sir EUSTACE FITZMAURICE PIERS, Bart., of 41 Finsbury Pavement, in the
City of London, Mechanical 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 :-
This invention relates to certain improvements upon apparatus for driving
tramway cars and other vehicles for which Letters Patent were granted to me
bearing date as of the 6th day of February 1889 No. 2144 my present invention
consisting of an improved arrangement of the hydraulic engine or engines and the
engine for working the pumps by which water is forced into the hydraulic engine
or engines to effect the driving of the vehicle. The hydraulic engine or engines
is or are carried on a bogie or on bogies upon which the body of the vehicle is

page_text: supported and the engine for working the pump is mounted in the body of the vehicle
The supply pipe or passage for water from the pump to the hydraulic engine or engines
passes through the axis or axes of the bogie or bogies and through an outer pipe
through which the water after acting in the hydraulic engine or engines returns to
the tank from which the pump draws the water. These pipes are provided with
stuffing boxes which permit of the required movements of the bogie or bogies and
between the pump and the hydraulic engine or engines a valve is or valves are
provided by means of which the driver can as desired or when required cause the
water to pass from the pump direct to the tank from which the said pump is
supplied and thereby prevent the water from entering the hydraulic engines to
drive the vehicle. In order that my invention may be well understood I will
further describe the same with reference to the accompanying drawings which
illustrate the application of the said invention to a tramcar having a driving bogie
at one end only of the car it being obvious however that a driving bogie may be
provided at each end of the car if desired.
Figure 1 is a sectional elevation of so much of the tramcar as is necessary to
illustrate the invention.
Figures 2 and 3 are respectively a sectional elevation and a plan of the driving
bogie and
Figure 4 is a vertical section (drawn to a larger scale) of the pipes or passages
through the axis of the bogie for water to and from the hydraulic engines.
A is the frame or bottom of the main body of the car beneath one end of
which is a water tank B from which water is pumped into the hydraulic engines C
carried ou a bogie D on which the opposite end of the body of the car is
supported. E are pumps the suction pipes e of which enter the tank B and the
delivery pipes f communicate by a pipe g with a chamber in proximity to the
hydraulic engines C. The pumps E are worked by a gas, oil, or other suitable
motor F situated in the body of the car the piston of the said motor imparting
rotation by a rod k to a pinion in gear with a wheel m on a shaft or spindle n
carrying an eccentric pin connection with the piston rod of the pumps the said
eccentric being provided with a link or lever motion or other suitable means by
which the stroke of the pump pistons may be varied as required. The chamber h
communicates with the cylinder of the hydraulic engine C, by pipes or passages G
and H arranged concentrically one within the other as shewn in Figure 4 the said
concentric pipes passing through the axis of the bogie D the said pipes being free
to turn in stuffing boxes or cup leathers 9 in the chamber to admit of the
turning of the bogie when passing round curves. The chamber his divided by a
partition r into two compartments s s² the pipe or passage G which is the inlet
passage to the hydraulic engine opening into the upper compartments and the
pipe or passage H which is the exhaust passage from the hydraulic engine com-
municating with the lower compartment S* from which compartment the exhaust
fluid is conducted by a pipe into the tank B. The piston or plunger of the
hydraulic engine is connected by a rod t with a crank u on one of the axles of the
bogie so that by the reciprocation of the said piston or plunger rotation is given
to the wheels of the bogie to propel the car.
with the pumps E is a valve and a branch pipe w leading to the tank B the said
In the delivery pipe 9 in connection
valve being capable of being operated by the driver by means of a lever x
so as to conduct the water from the pumps either through the pipe g into the
hydraulic engines or through the branch pipe w back into the tank from which it
was pumped. By this means the necessity for stopping the motor F when the car
is required to be stopped is obviated as by turning the valve v so as to conduct the
water back to the tank the pumps may continue to work as the water will simply
circulate through the pump and the tank, whilst the car can be readily started by
simply turning the valve r so as to conduct the water through the pipe g into the
hydraulic engine. By varying the stroke of the pumps by means of a link or lever
motion as shown or equivalent means the speed of the car can be regulated as
required.
0

page_text: 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. In connection with motive power engines for driving tram cars or other
vehicles the combination of a primary motor situated in the body of the vehicle
and a secondary motor or motors carried on a bogie or on bogies on which the
main body of the vehicle is carried the primary motor operating a pump or pumps
for supplying fluid under pressure to the secondary motor the said fluid passing
through passages in the axis or axes of the bogie or bogies to and from the
secondary motor or motors substantially as herein before described.
2. The combination and arrangement of parts constituting means for driving
tram cars and other vehicles substantially as herein before described and illustrated
by the accompanying drawing.
Dated this 15th day of May 1805
JOHNSONS & WILLCOX,
Agents.