Year: 1888

page_text: Date of Application, 19th May, 1888
Complete Specification Left, 18th Feb., 1889
Complete Specification Accepted, 6th Apr., 1889
I, RODRIGO THOMAS TERRERO of 17 Stanley Gardens, Belsize Park, London, in the
County of Middlesex, Gentleman, do hereby declare the nature of this invention to be
as follows:
My invention relates to an improved form of valve gear for steam or other fluid
engines, whether single, compound or other multiple expansion engine, and it has for its
object the simplification of the valve gear and the consequent reduction of first cost, and
the ultimate maintenance in efficient condition of the said gear.
As my new gear is specially adapted for triple expansion engines I will for the
purpose of this application for Letters Patent describe my invention as applied to such
engines.
In a convenient position with respect to the three cylinders-preferably transverse
thereto I provide a circular valve chamber slightly tapered towards one end. In this
valve chamber I fit a taper cylinder forming a triple valve adapted to. rotate in the
said chamber.
The ends of each of the three cylinders are connected with the valve chamber by
suitable ports for the induction and eduction of the steam or other fluid. Between the
high pressure and middle pressure cylinders, or in any other convenient position, an
annular recess is formed round the cylindrical valve to receive the steam or other
fluid direct from its source. In this annular recess an opening or port is provided in
the wall of the cylindrical valve to admit the steam or other fluid at all times into a
compartment or chamber provided within the valve. Through the outer wall of this
compartiment or chamber is provided an opening or port of a suitable area to admit the
steam or other fluid to the ports of the high pressure cylinder during the rotation of
the valve.
In the valve another compartiment or chamber is provided having two suitable
openings or ports, the one to exhaust the steam or other fluid from the high pressure
cylinder, and the other to admit it into the middle pressure cylinder. A further compart-
ment or chamber is provided in the valve, having two suitable openings or ports, the
one to exhaust the steam or other fluid from the middle pressure cylinder, and the
other to admit it into the low pressure cylinder.

page_text: One other compartment or chamber is provided in the valve having two suitable
openings or ports, the one to exhaust the steam or other fluid from the low pressure
cylinder into the compartment, and the other to allow it a free exit to the condenser
through a suitable annular recess formed round the valve, thus placing the last
hereinbefore referred to compartment or chamber of the valve in constant communica-
tion with the condenser.
It will be understood that the number of chambers in the valve are equal to the
number of cylinders in the engine and also that the openings or ports in the various
compartments or chambers of the valves are so arranged as to admit and exhaust the
steam or other fluid, to and from the three cylinders to produce the reciprocations of
the pistons of the said cylinders with respect to each other, to coincide with the angles
at which the respective cranks, operated by the pistons of the said cylinders, are set to
each other, and further that the valve ports in the valve chamber leading to the three
cylinders are of such areas, and are arranged in such positions, as will give the
necessary lap and lead to the respective parts of the triple valve.
I impart a continuous rotary motion to my cylindrical valve from the crank axle,
either directly through cranks or eccentrics and double connecting rods, or indirectly
through spur or other gearing.
I either mount the circular valve on a shaft or axle passing through one or both
ends of the valve chamber and provided with suitable stuffing boxes, or I form or fix
a shaft or axle on to the large end of the valve and pass it through the end of the valve
chamber by means of a suitable stuffing box, to receive its driving motion. The other
or smaller end of the valve is adapted to receive the end of an adjustable set screw,
the function of which is to prevent the valve wedging itself too tightly in the taper
chamber.
Dated this 10th day of May 1000
ROBT. ED. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
Royal Courts Chambers,
70, 71 & 72, Chancery Lane, London, W.C.,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Steam and other Fluid Engines.
I, RODRIGO THOMAS TERRERO, of 17 Stanley Gardens, Belsize Park London, in
the County of Middlesex, Gentleman, 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 :-
My invention relates to an improved form of valve gear for steam and other fluid
engines, whether single, compound, or other multiple expansion engine, and it has
for its object the simplification of the valve gear and the consequent reduction of
first cost, and the ultimate maintenance in efficient condition of the said gear.
As my new gear is specially adapted for triple expansion engines I will for the
purpose of this application for Letters Patent describe my invention as applied to
such engines making reference to the accompanying drawing in which Figure 1. is
a view in longitudinal sectional elevation of my improved valve.
Figure 2. is a transverse section on line v. v.
Figure 3. is a transverse section on line w. w.
Figure 4. is a transverse section on line x. x.
Figure 5. is a transverse section on line y. y., and Figure 6. is a transverse section
on line 2. s.
Throughout these views similar parts are marked with like letters of reference.
In a convenient position with respect to the three cylinders-preferably transverse
thereto I provide a circular tapered valve chamber A preferably fitted with a bush A¹
as illustrated. In this valve chamber is fitted a taper cylinder B forming a triple valve,
and adapted to rotate in the said chamber.
The ends of each of the three cylinders are connected with the valve chamber A by
suitable ports h. h, m. m, and 1. 1, for the induction and eduction of the steam or
other fluid. Between the high pressure and middle pressure cylinders, or in any
other convenient position, an annular recess C is formed round the valve chamber A
to receive the steam or other fluid direct from its source. Suitable openings or
ports c. c. etc. are provided in the wall of the cylindrical valve chamber A, or in the
bush A', and a suitable opening or port d is provided in the wall of the cylin-
drical valve B to admit the steam or other fluid at all times into a compartment
or chamber D. provided within the valve B. Through the outer wall of this com-
partment or chamber D, in a suitable position, is provided an opening or port d'
of a suitable area to admit the steam or other fluid to the ports . of the
H.P. cylinder during the rotation of the valve.
In the valve B another compartment or chamber E is provided having two suitable
openings or ports, the one e to exhaust the steam or other fluid from the H.P. cylinder,
and the other e¹ to admit it into the ports m. m of the M.P. cylinder. A further
compartment or chamber F is provided in the valve B, having two suitable openings
or ports, the one to exhaust the steam or other fluid from the M.P. cylinder, and
the other to admit it into the ports 1. 1. of the L.P. cylinder. One other com-
partment or chamber G is provided in the valve B having two suitable openings

page_text: or ports, the one g to exhaust the steam or other fluid from the L.P. cylinder, and
the other g to allow it a free exit to the condenser through suitable openings or
ports j. j in the wall of the cylindrical valve chamber A, or bush A¹, to the
annular recess J formed round the valve chamber A, thus placing the chamber G of
the valve B in constant communication with the condenser.
It will of course be understood that the number of chambers in the valve is always
one more than the number of cylinders to the engine, and also that the openings
or ports in the various compartments or chambers of the valve are so arranged as
to admit and exhaust the steam or other fluid, to and from the cylinder or cylinders,
to produce the reciprocations of the piston or pistons of the said cylinder or cylinders
with respect to each other, to coincide with the angle or angles at which the crank or
cranks operated by the piston or pistons of the said cylinder or cylinders are set, and
further that the valve ports in the valve chamber leading to the cylinders are of such
areas, and are arranged in such positions, as will give the necessary lap and lead to the
respective parts of the valve.
Instead of forming the annular recess C and J for the induction and eduction of
the steam, I sometimes admit the steam into the smaller end of the valve chamber.
and provide a suitable opening in the end of the valve giving access to the chamber D
of the valve, and for the exit of the steam I provide a suitable opening in the other
end of the valve putting the chamber G in communication with the end of the valve
chamber which is in communication with the condenser.
Continuous rotary motion is imparted to the cylindrical valve B by means of the
shaft B' either directly through cranks or eccentrics and double connecting rods or
indirectly through spur or other gearing. The axle B₁ passes through the end of
the valve chamber A by means of a suitable stuffing box, and the other or smaller
end of the valve abuts against the end of an adjustable set screw, the function of
which is to prevent the valve wedging itself too tightly in the taper chamber.
To keep the valve up to its seating three or more springs etc. are fitted
in the cover a of the valve chamber A which bears against a ring.al adapted to
press against the end of the valve B. The strength of the springs etc. is
regulated by 'set screws etc. as illustrated.
I do not limit myself to the use of the particular arrangements hereinbeforo'
described for operating the valve; or for keeping it up to its seating, but hold myself
at liberty to use any equivalent devices.
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 I
claim is
".
First: A valve gear for steam or other fluid pressure" engines constructed,
arranged, and operating, substantially as herein before described and illustrated by the
accompanying drawing."
Second: In a steam or other fluid engine, a taper cylindrical valve adapted to
rotate in its seat and distribute and exhaust the steam or other fluid, in the manner
hereinbefore set forth.