Improvements in Valve-gear for Operating Corliss Valves of Motive- power Engines.
Year: 1893

page_text: Date of Application, 18th Feb., 1893
Complete Specification Left, 16th Nov., 1893-Accepted, 6th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Valve-gear for Operating Corliss Valves of Motive-
power Engines.
We, JOHN HARRISON, WILLIAM LOYND, and RICHARD HENRY CLAYTON,
all of the Firmn of Clayton, Goodfellow and Company of Atlas Iron Works,
Grimshaw Park Road, Blackburn in the County of Lancaster, Engineers,
Millwrights, and Iron Founders, do hereby declare the nature of our said invention
to be as follows:-
This invention relates to improvements in valve-gear for operating Corliss valves
of motive-power engines and consists in the combination, construction, and
arrangements of parts whereby Corliss valves may be operated with efficiency and
economy.
The
To the spindle of each Corliss valve for the admission of steam or other driving
medium is fixed a lever connected by a sliding block and pin or centre to a trip-rod
attached to a piston in a spring "dash-pot" or cushioning cylinder.
aforesaid trip-rods are mounted in bearings on a standard or framing connected
to the cylinder or valve-box in any convenient manner. Each trip-rod is
operated upon, to open the Corliss valve to which it is attached, by means of a
block or die mounted on the outside of an eccentric ring or clip. The latter is
provided with an arm or rod to which is connected a rod controlled by a governor,
and by which the position of the block or die is regulated to release the trip-rod
according to the varying weight or load on the engine. The eccentric for each
trip-rod is fixed on a shaft mounted in bearings attached in any convenient manner
to the cylinder or valve-box, or boxes; the whole being so arranged as to be self-
contained or otherwise. Between the bearings the shaft carrying the eccentrics is
covered by a stationary tube to protect the same, and prevent accident. If desired
each trip-rod may be constructed in the form of a framed or slotted slide mounted
in the aforesaid bearings in any convenient manner, and coupled to the lever on the
Corliss valve spindle by a link or its equivalent. In the framed or slotted slide
operates the aforesaid eccentric and the block or die mounted on the outside of the
ring or clip. In this arrangement of valve-gear the exhaust Corliss valves may be
operated from the aforesaid shaft by means of eccentrics. The latter operate on bowls
or rollers mounted on pins or centres in framed or slotted slides disposed in bearings
or standards attached to the cylinder or valve-box. The framed or slotted slides
are connected to the exhaust Corliss valve spindles by levers and links in any
convenient manner.
Dated the 17th February 1893.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.
COMPLETE SPECIFICATION.
Improvements in Valve-gear for Operating Corliss Valves of Motive-
power Engines.
We, JOHN HARRISON, WILLIAM LOYND, and RICHARD HENRY CLAYTON,
all of the Firm of Clayton, Goodfellow and Company of Atlas Iron Works,
Grimshaw Park Road, Blackburn in the County of Lancaster, Engineers,
Millwrights, and Iron Founders, do hereby declare the nature of our said invention
[D17

page_text: effecting or regulating the cut off of the driving medium according to the
movements of the governor caused by the varying weight or load driven by the
engine. The block or die R is secured to the projection W on the eccentric ring
or clip S by the bolt X and nuts Y. The eccentrics T are fixed on the driving
shaft E; the latter being mounted in the bearings Z on the bottom end of the
standards Q, the whole being arranged so as to be self-contained or otherwise. In
the latter case the spring "dash-pots" or cushioning cylinders O are secured to the
covers G of the Corliss valve-boxes C, thereby dispensing with the bridge or
connecting piece a as shown in Fig. 1. Between the bearings Z the driving
shaft E is covered or enclosed in the stationary tube b to protect the same and
prevent accident.
If desired each trip-rod M may be constructed in the form of
a framed or slotted slide, and mounted in the bearings P as shown in Fig. 5, being
connected or coupled to the levers J by the links d and pins f. In the framed or
slotted slides M forming the trip-rods operate the eccentrics T and the blocks or
dies R on the clips or rings S. The slides or trip-rods M are provided with the
rods 9 connecting them with the spring "dash-pots or cushioning cylinders O.
In this arrangement of valve-gear the exhaust Corliss valves are operated from
the driving shaft E by means of the eccentrics h, which operate on the bowls or
rollers mounted on the pins or centres k in the framed or slotted slides 1 disposed
in the bearings P attached to the cylinder A. The framed or slotted slides / are
connected to the exhaust Corliss valve spindles m by the levers n and links o.
"
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
The general arrangements, constructions, and combinations of parts composing
the improved valve-gear for operating Corliss valves of motive-power engines, as
hereinbefore described and as illustrated in the annexed drawings.
Dated the 11th November 1893.
EDMUND CHADWICK, F.I.C.P.A.,
Agent.