Improvements in Valve Motions for Steam Engines.
Year: 1895

page_text: Date of Application, 13th July, 1895
Complete Specification Left, 12th Mar., 1896-Accepted, 25th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in Valve Motions for Steam Engines.
I, JOHN HARGREAVES, of Leebrook Foundry Rawtenstall, in the County of
Lancaster, Mechanical Engineer, do hereby declare the nature of this invention
to be as follows:-
"
This invention relates to the mechanism and trip motion for working "Corliss
valves of steam engines, whereby one set of trip, releasing, or knock off gear, is
applied and used in such a way, as to work two or more sets of admission valves,
on two or more steam engine cylinders, in engines of the tandem type, or where
the cylinders are put behind each other or on the same centre line as in vertical
or the inverted type. For this purpose I connect from the lever ends, mounted or
keyed on the valve spindles, from the lever end on the front valve spindle of one
cylinder to the lever end on the front valve spindle of the next or following
cylinder by a connecting rod, and in the same manner connect the valves at the
back ends of two or more cylinders, so as to work them simultaneously by one trip
motion.
Tuly 19th 1905
Improvements in Valve Motions for Steam Engines.
I, JOHN HARGREAVES of Leebrook Foundry, Rawtenstall, in the County of
Lancaster, 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 the mechanism and trip motion for working "Corliss
valves of steam engines, whereby one set of trip releasing or knock off gear, is
applied and used in such a way as to work two or more sets of steam admission
valves; on two or more steam engine cylinders, in engines of the tandem type, and
where the cylinders are put behind each other, or on the same centre line, as in
vertical or the inverted type.
In order that the nature of my invention may be fully understood I will refer to
the accompanying sheet of drawing wherein Fig. 1. represents an elevation of
part of a steam engine showing steam cylinders, valve motion, and one method of
connecting up the valve rods.
From the lever ends, mounted or keyed on the valve spindles of admission
valves, I connect from the lever end A on the front valve spindle of one cylinder
to the lever end B on the front valve spindle of the next or following cylinder, by
a connecting rod C, and in the same manner connect the valve levers D and É at
the back ends of two or more cylinders, so as to work them simultaneously by one
trip motion. The trip motion, wrist plate or other arrangement may be placed
between the cylinders, as in Fig. 2, and the one trip motion used to work the steam
admission valves of both cylinders.

page_text: 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,-
1. The using of one set of trip motion only, for working two or more sets of steam
admission valves, in tandem, vertical, or inverted steam engines with Corliss or
other trip gear, on two or more steam engine cylinders, by coupling up and using
.connecting rods as herein described.
1
1000
JOHN HARGREAVES.