IMPROVE- MENTS IN COMPOUND STEAM ENGINES
Year: 1878

page_text: LETTERS PATENT to George Waller and Frederick Colyer, both of Holland
Street, Southwark, in the County of Surrey, for the Invention of "IMPROVE-
MENTS IN COMPOUND STEAM ENGINES."
Sealed the 11th October 1878, and dated the 17th April 1878.
PROVISIONAL SPECIFICATION left by the said George Waller and Frederick.
Colyer at the Office of the Commissioners of Patents on the 17th April
1878.
GEORGE WALLER and FREDERICK COLYER, both of Holland Street, Southwark;
in the County of Surrey. IMPROVEMENTS IN COMPOUND STEAM ENGINES."
"
This Invention has for its object the arrangement of the different parts of
compound steam engines, whereby they are simplified and rendered more compact.
The Invention consists,-
Firstly. In an arrangement by which the high and low pressure cylinders are
placed side by side horizontally on a base plate, the low-pressure cylinder being
continued to form a chamber for the high-pressure cylinder and for the steam
when passing to it from the high-pressure cylinder. The two piston rods are.
secured to one cross head working in guides on the base plate, and moved by one
connecting rod working between them. The air pump is also horizontally placed
in the condenser behind the steam cylinder on the same base plate, and is worked
by the piston rod direct.
Secondly. In an arrangement by which the two cylinders are secured to a
vertical standard or frame, and inclined towards each other at an angle of forty-five
degrees, or any other angle that may be suitable. In the front and between the
cylinders is a vessel, which acts as a receiver for the steam passing from the highi
to the low pressure cylinder, the two connecting rods being attached to one crank
Dains G31

page_text: pin. The air pump in the condenser is vertical, and is worked by the cranked
shaft between the standards. This arrangement is specially suitable where length
of space occupied by the engine is an important consideration.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Waller and Frederick Colyer in the Great Seal Patent Office
on the 17th October 1878.
GEORGE WALLER and FREDERICK COLYER, both of Holland Street, Southwark,
in the County of Surrey. "IMPROVEMENTS IN COMPOUND STEAM ENGINES."
This Invention has for its object the arrangement of the different parts of
compound steam engines, whereby they are simplified and rendered more compact.
The Invention consists,―
Firstly. In an arrangement by which the high and low pressure cylinders are
placed side by side horizontally on a base plate, the low-pressure cylinder being
continued to form a chamber for the high-pressure cylinder and for the steam when
passing to it from the high-pressure cylinder. The two piston rods are secured to
one cross head working in guides on the base plate, and moved by one connecting
rod working between them. The air pump is also horizontally placed in the
condenser behind the steam cylinder on the same base plate, and is worked by the
piston rod direct.
Secondly. In an arrangement by which the two cylinders are secured to a
vertical standard or frame, and inclined towards each other at an angle of forty-
five degrees, or any other angle that may be suitable. In the front and between
the cylinders is a vessel, which acts as a receiver for the steam passing from the
high to the low pressure cylinder, the two connecting rods being attached to one
crank pin. The air pump in the condenser is vertical, and is worked by the
cranked shaft between the standards. This arrangement is specially suitable where
length of space occupied by the engine is an important consideration.
In order that the foregoing may be more easily understood Drawings are attached
hereto of which the following is a description:-
Fig. 1 is a plan of the arrangement first described, A being the high-pressure
cylinder, and B the low-pressure cylinder, both fixed to the base plate C. The
piston rods D, D, are both secured to the cross head E, which works in the
guides F, F, the connecting rod being marked G, and the condenser H.
Fig. 2 is an elevation of the second arrangement before described. In this Fig.
I is the high-pressure cylinder, and J is the low-pressure cylinder, both attached
to the frame K. L is a vessel that receives the steam in its passage from the high
to the low pressure cylinder, the steam pipe being marked M. Both connecting
rods N and O are attached to the crank pin P. Q is the rod of the air pump,
which is within the condenser R, the pump being worked by the cranked shaft
between the standards or frames K.

page_text: Having now described and particularly set forth the nature of this Invention, and
the manner in which the same is or may be used or carried into effect, we would
observe in conclusion that we do not confine or restrict ourselves to the precise details
or arrangements that we have described or referred to, as variations may be made
therefrom without deviating from the principles or main features of this Invention,
but what we consider to be novel and original, and therefore claim as the Invention
secured to us by the herein-before in part recited Letters Patent is,-
First. The construction of compound steam engines, wherein the cylinders are
placed side by side, the piston rods being connected to one cross head working in
two guides, but acting on one connecting rod only, as herein described, and shown
on the Drawings.
And, Secondly. The arrangement of a high and a low pressure cylinder upon a
vertical but angular frame, the connecting rods of both being attached to one crank
pin, as herein described and shown on the Drawings.
In witness whereof, I, the said George Waller, have hereunto set my hand
and seal, this Sixteenth day of October, in the year of our Lord One thousand
eight hundred and seventy-eight.
GEO. WALLER. (L.S.)