IMPROVEMENTS CONNECTED WITH THE MECHANICAL PRO- PULSION OF VEHICLES ON COMMON ROADS, TRAMROADS, AND RAILWAYS
Year: 1877

page_text: PROVISIONAL SPECIFICATION left by George Bell Errington Galloway at
the Office of the Commissioners of Patents on the 1st May 1877.
GEORGE BELL ERRINGTON GALLOWAY, of 85, Gracechurch Street, in the City of
London, Engineer. "IMPROVEMENTS CONNECTED WITH THE MECHANICAL PRO-
PULSION OF VEHICLES ON COMMON ROADS, TRAMROADS, AND RAILWAYS."
This Invention relates to the existing tramway cars by supplying motive power
consisting of compressed air, or air and steam, by the following means, viz:-Ì affix
by suitable framing and longitudinally to the frames of cars or carriages, either by
iron or wood, or both, a connection by which each frame is extended in length; the
object and use of this extension is to enable me to affix my motive power and air-
compressing cylinders as engines thereto.
The engine and air-compressing cylinders may be in line, and the piston rod
working direct out of the motive-power cylinder into the air-compressing cylinder,
and the connecting rod may be either connected with the piston rod or by a connec-
tion working in a frame affixed on each side of the cylinders.
The means by which I cause the tram car to travel is, I connect the existing
wheels to the connecting rod by suitable arrangements, which connecting rod may
have a coupling or joint in it instead of being as usual in one length, as the means
to allow for any straining of the carriage while in motion.
The continuation of the framework will enable me to affix two wheels as guide
wheels, which will have the tendency to steady and to carry the weight of the
extension and the machinery in connection with this extension, such as also the
boiler or power generator, which power generator may be constructed by sectional
pipes.
In cases where I cause the heat to pass through the pipes they are surrounded
with water and atmospheric air, and in cases where I cause the feed water
and atmospheric air to be forced by the air-compressing cylinders by suit-
suitable connections into the pipes or tubes or space immediately connected with
the coke or other furnace, I affix an outer circular, or other form, for the purpose
of accumulating the motive power by which the engines work, and the pressure
power necessary for breaking the engine or carriages may be effected.
I propose to make the extension at each end of tramway cars, and affix a boiler
or power generator upon or in connection therewith.

page_text: The means by which I supply the power from the generator is by suitable regula-
ting valves and pipes, the connection of which will be reciprocatory, so that either
one generator and engines connected therewith may be caused to work, or both gene-
rators or set of engines may work simultaneously; and in some cases I may only
apply one motive-power engine and air-compressing pump of larger diameter,
affixed vertically or longitudinally by suitable connections, as the means to effect
propulsion.
The top part of the generator will be utilized as a tank for water, the exhaust
pipes passing through this water tank, which may be made in sections; or I may
affix the water tank as part of the connection underneath, and pass the exhaust
vapour through such tank, and continue the pipes through which the vapour has
passed, after it has given off its heat to the feed water, into a space which is in con-
nection with the fire or furnace, the object being to decompose the vapour, so that
no deleterious vapour shall pass into the atmosphere.
The breaking of engines or carriages I may effect by the ordinary breaking
appliances, or by the pressure from the generator; or an accumulator wherein I may
compress atmospheric air, and utilize this atmospheric air as an auxilary means of
producing motive power, the air pumps being so connected therewith by suitable
valves and pipe connections as that the air from the pumps shall be forced into this
accumulator, to be stored up therein, and applied therefrom to the engines instead
of steam, in connection with air from power generators, or the accumulator may be
connected therewith.
I may utilize the existing axles of tram cars by affixing thereto an excentric or
cam motion, by which the power will be applied and regulated by movement of the
valves.
I also extend the framework of waggons and other vehicles at one end, where the
shafts for horses now exist, and affix the power generators and connections there-
with. In this case I utilize the front wheels, and by the use of what is called a
driving pinion, which I affix so that it can work into a segment or spur wheel, which
I fix to the spokes of the existing wheels, I produce the travelling. In the applica-
tion of this part of my Invention I affix a guide or centre wheel which will support
the weight of the extension generators, etc.
The guiding will be effected by the driver, who may either walk by the side, as
customary when horses are used, or by an arrangement placed so that he can
effectually guide, control, stop, and reverse the waggon or vehicle.
The mode by which I compress the air is that the compressing double-acting air
pumps, which air pumps may be in their construction so made that the movement
of the piston striking against a tappet rod or tappet rods, working on each side
through the cylinder, top and bottom, and being connected with the slide valves will
allow the escape of the air into the pipes connected with the accumulator, and the
steam or motive-power piston valves may be also moved or actuated by the tappet
motion connections.
In some cases I may construct the power-generator engines and connections upon
an independent framework, and affix two central wheels, one at each side, which
wheels may be made with double flanges or a central flange, which central flange
may be so made as to reciprocate, in order that the engine may travel on common
roads when necessary; and in such a description of engine, I fit a central guide
wheel near the end of the framework, and in some cases I connect the central wheel,
which in form is made broad and with a rough surface, and connect such wheels
to the engines, so that it will form the means of travelling; and the motors herein-
before named and referred to may be connected with any number of carriages or.
conveyances the power will admit of for the purpose of travelling on rail or common
roads.