Improvements in and relating to the Valve Gear of Winding and like Engines.
Year: 1894

page_text: Date of Application, 29th June, 1894
Complete Specification Left, 27th Apr., 1895-Accepted, 8th June, 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to the Valve Gear of Winding and
like Engines.
I, JOHN GALILEO BARCLAY, of Argyle House, Kilmarnock, Ayrshire,
Engineer, do hereby declare the nature of my invention to be as follows:-.
This invention has reference to an improved construction of the operating
mechanism or gear for the exhaust and steam crown or Cornish equilibrium valves
of winding and like engines. Heretofore there has been a considerable back
pressure in the cylinders of these engines, entailing a great waste or expenditure of
steam, but by my improved devices I open the exhaust valve quickly and keep it
full open to the end of the stroke, whereby this back pressure will be obviated and
the steam economised.
By one modification of my improvements I form each of the oscillating levers
which operate the exhaust valves, of a kneed or recessed club shape on its acting
surface, instead of being straight as heretofore. The oscillating or vibrating organ
actuated through link gear from the eccentric mechanism and which operates the
lever mechanism of the exhaust and steam valves, I also form with a projecting or
toothed face, with its acting surface cut to the same angle as the aforesaid kneed
face of the exhaust valve lever, so as in its oscillatory movements to come in acting
contact therewith and operate the lever to open or close the exhaust valve. The
oscillatory organ is formed with an extended segmental convex or cam surface
beyond the aforesaid angled face, and the exhaust valve lever is formed with a
corresponding concave or curved face beyond the angled surface acted on by
angled face of organ, so that when the latter has oscillated or moved the lever
beyond the angled faces the convex curved surface of moving organ will be in
contact with the concave surface of lever and so keep the exhaust valve full open
until on the return oscillation of organ its angled face comes in contact with the
'corresponding face of valve lever. Instead of the aforesaid angled faces being
straight they may be slightly curved if desired.
+15.
. I
The other arm or horn of oscillating organ operates by its to and fro motion the
oscillatory lever mechanism of the steam valve in the usual manner.
3
2. 3
COMPLETE SPECIFICATION.
Improvements in and relating to the Valve Gear of Winding and
like Engines.
"
-
!, John. Galileo: BARCLAY, of Argyle House, Kilmarnock Ayrshire,
Engineer, do hereby declare the nature of my invention to be as follows:-
This invention has reference to an improved construction of the operating
[Price 8d.]

page_text: mechanism or gear for the exhaust and steam crown or Cornish equilibrium valves
of winding and like engines. Heretofore there has been a considerable back
pressure in the cylinders of these engines, entailing a great waste or expenditure of
steam, but by my improved devices I open the exhaust valve quickly and keep it
full open to the end of the stroke, whereby this back pressure will be obviated and
the steam economised. And in order that my said invention, and the manner of
performing or carrying the same into effect or practice may he properly understood
have hereunto appended an explanatory sheet of drawings in which the same
reference letters are used to indicate corresponding parts in all the figures where
shown.
Figures 1 and 2 are detached elevations to an enlarged scale of the oscillating
lever of exhaust valve and the vibrating actuating organ respectively as formed in
accordance with my improvements.
Figure 3 is an elevation of part of a winding engine showing the improved
devices shown in Figures 1 and 2 as applied thereto.
Figures 4 and 5 are elevations of engines showing slightly modified arrangements
of my improvements as applied thereto.
Referring to these drawings:-By one modification of my improvements as shown
in Figures 1, 2, and 3, I form each of the oscillating levers a which operate the exhaust
valves of a kneed or recessed club shape at a' on its acting surface, instead of being
straight as heretofore. The oscillating or vibrating organ bactuated through link
gear from the eccentric mechanism in the ordinary manner, and which operates the
lever mechanism of the exhaust and steam valves I also form with a projecting or
toothed face with its acting surface b¹ cut to the same angle as the aforesaid kneed
face a¹ of the exhaust valve lever a so as in its oscillatory movements to come in
.acting contact therewith and operate the lever a to open or close the exhaust valve.
The oscillatory organ is formed with an extended segmental convex or cam
surface beyond the aforesaid angled face b¹ and the exhaust valve lever a is
formed with a corresponding concave or curved face a' beyond the angled surface a¹
acted on by angled face 6' of organ b so that when the latter has oscillated or
moved the lever a beyond the angled faces a, b, the convex curved surface 6 of
moving organ will be in contact with the concave surface a² of lever a and so keep
the exhaust valve full open until on the return oscillation of organ, b its angled
face comes in contact with the corresponding face a of valve lever a. Instead
of the aforesaid angled faces a' b¹ being straight they may be slightly carved if
desired as shown in Figures 1 to 3.
b
b
f
The other arm or horn 63 of oscillating organ 6 operates by its oscillatory or to
and fro motion the end c of the oscillatory lever mechanism of the steam valve in
the usual manner.
:). In the arrangement shown in Figure 4 instead of having a lever the organ a is
formed on or mounted direct on the spindle d of the exhaust valve and has the
faces a¹ a² formed on it in an analogous manner to that previously described while
the valve organ b is also slightly modified.
In the arrangement shown in Figure 5 two organs 6 are mounted on a shaft 6 in
reverse positions, and while the faces of the organ bare formed much in the
same manner as in the modifications previously described the positions of the
surfaces a¹ a² on the organ a are simply reversed to suit the reverse positions of
the organs b.
4-7
i...
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 arrangement in combination of the operating parts of the valve gear of
winding and like engines, substantially as 'herein described in reference to and
shown in the accompanying drawings.
2. In winding and like engines the forming of the acting parts of the exhaust

page_text: valve mechanism and of its actuating vibrating organ in the improved manner
substantially as herein described in reference to and shown in the accompanying
drawings.
Dated the ofthat Al 1905
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow: Agents.