Improved Form of Engine Adapted to Tramcars and Locomotives.
Year: 1888

page_text: Date of Application, 30th July, 1888
Complete Specification Left, 30th May, 1889-Accepted, 13th July, 1889
PROVISIONAL SPECIFICATION.
Improved Form of Engine Adapted to Tramcars and Locomotives.
I EUSTACE FITZMAURICE PIERS of St. George's Works Hulme Manchester
Mechanical Engineer do hereby declare the nature of this invention to be as
follows
My patent Engine consists of a combination of a Compressed air Engine, with a
Gas Engine, Hot air Engine or Petroleum Engine, and is adapted particularly for
propelling Tramicars, and also to be used for Locomotives.
The object of this combination is threefold.
Firstly To overcome the difficulty hitherto experienced in starting Tramcars or
Locomotives, when Gas, Hot air or Petroleum alone is used as the motive power.
Secondly The difficulty experienced in keeping the Gas or other of the aforesaid
Engines.cool.
Thirdly The difficulty experienced in keeping the Compressed air Engine cylinder
at a proper temperature owing to the cold generated by the expansion of the air.
The first difficulty I overcome by first putting into motion the Compressed air
Engine, which consequently starts the Gas, or either of the aforesaid Engines.
The second difficulty I overcome by allowing the air after expansion in the air
cylinder to pass round the Gas, or other of the aforesaid Engines cylinder; or if
thought more desirable after allowing the air to partially expand in the air engine
cylinder, to complete its expansion in the Gas or other of the aforesaid Engines
cylinder thus cooling the cylinder.
The third difficulty I overcome by allowing the hot exhaust to pass from the Gas,
or other of the aforesaid Engines cylinder round the air engine cylinder, thus,
warming it.
A suitable method of combining the air engine with the Gas, or other of the
aforesaid Engines, would be to fix the air Engine on to the end of the Gas, or other
Engines, and prolong and produce the piston rod of the Gas, or other of the afore-
said Engines, through the end of its cylinder, into the air engine cylinder, the end of
such piston rod, terminating in the piston of the air engine.
COMPLETE SPECIFICATION.
Improved Form of Engine Adapted to Tramcars and Locomotives.
I, EUSTACE FITZMAURIOE PIERS, of St. Georges Works, Hulme, Manchester
Engineer do hereby declare the nature of this Invention and in what manner the
sanie is to be performed to be particularly described and ascertained in and by the
following statement :-
My Invention consists in the main in the combination of a compressed air engine
with a Gas engine a Hot air engine or a petroleum engine. The arrangement
according to my Invention is adapted particularly for propelling Tramcars but can
also be used for locomotives. The object of my Invention is threefold.
First. To overcome the difficulty hitherto experienced in starting Tramcars and
Locomotives, when Gas, Hot air or Petroleum alone is used as the motive power.
Secondly. To overcome the difficulty experienced in keeping the Gas engine, Hot
air engine or petroleum engine cool.
Thirdly. To overcome the difficulty experienced in keeping the compressed air
cylinder at a proper temperature, owing to the cold generated by the expansion of

page_text: .
The first difficulty I overcome by first putting into motion the compressed air
engine which consequently starts the gas engine or other of the aforesaid engines.
The second difficulty I overcome by allowing the air after expansion in the air
cylinder to pass round the gas or other of the aforesaid engines cylinder, or if
thought more desirable after allowing the air to partially expand in the air engine
cylinder to complete its expansion in the gas or other of the aforesaid engines
cylinder thus cooling the cylinder. The third difficulty I overcome by allowing the
hot exhaust to pass from the gas or other of the aforesaid ergines cylinder round
the compressed air engine cylinder thus warming it.
A suitable method of combining the compressed air engine with the gas or other
of the aforesaid engines is illustrated by the accompanying drawing in which A A
represent the compressed air engine cylinders and B B the gas engine cylinders.
The cylinders A and B are shewn arranged tandem fashion whereby the piston of
each pair of the said cylinders A and B are connected together by one and the
same piston rod so that the pistons of the gas cylinders B are acted upon directly
from the pistons of the compressed air cylinder A but the said cylinders may be
otherwise arranged if desired. In order to start the engine compressed air is first
admitted from a compressed air reservoir (not shewn in the drawing) through a
pipe a to the cylinders A A which consequently starts the gas engines B after which
the supply of air to the cylinders A may he cut off or a small quantity may be
admitted thereto for the purpose of assisting the gas engines and also for maintaining
the gas engine cylinders cool. The compressed air after acting on the pistons in the
cylinders A escapes therefrom and passes through pipes_b_into_jacketted spaces
surrounding-the-cylinders-B in which spaces the air expands and maintains the gas
cylinders cool. The exhaust from the gas or other engines B passes through the
pipe c into jacketted spaces surrounding the compressed air cylinders A A thereby
maintaining the said cylinders at the required temperature. C-is-a cylinder which
may be used as an air pump for compressing air into the air reservoir which supplies
the cylinders A or it may be used as an air or gas cylinder in conjunction with the
* cylinders B.
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 1
claim is―
1st. An engine consisting of or containing the combination of a compressed air
engine with a gas engine a hot air engine or a petroleum engine substantially as
hereinbefore described.
2nd. The means substantially as herein before described for first putting in motion
the compressed air engine so that it starts the gas engine, hot air engine or
Petroleum engine.
3rd. In an engine as described providing.
.means whereby the air after expansion
in the air cylinder or during expansion is passed round the cylinder of the gas or
other aforesaid engine substantially as hereinbefore described.
4th. In an engine as described providing means whereby the hot exhaust is caused
to pass from the gas engine hot air engine or Petroleum engine round the compressed
air engine cylinder for warming it.
5th. The arrangement and combination of parts constituting the engine as
hereinbefore described and illustrated.
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