Improved Means of Actuating the Slide Valves, or other Valves, for the Admission and Discharge of Steam, Water, or Air to and from the Cylinders of Reciprocating or Non-rotary Engines.
Year: 1895

page_text: Date of Application, 28th Feb., 1895
Complete Specification Left 25th Nov. 1895-Accepted. 28th Dec., 1895
Date of Application, 26th Feb., 1895
Complete Specification Left 25th Nov. 1895-Accepted. 28th Dec., 1895
PROVISIONAL SPECIFICATION.
Improved Means of Actuating the Slide Valves, or other Valves, for
the Admission and Discharge of Steam, Water, or Air to and from
the Cylinders of Reciprocating or Non-rotary Engines.
HENRY BARNETT 64 Shawcross Street Higher Hillgate Stockport by trade
Machine Fitter and ALFRED WILLIAM BARNETT 22 Osborne Road off Lowfield
Road Stockport by occupation Locomotive Fireman do hereby declare the nature
of this invention to be as follows:-
On the engine bed is fixed a small cylinder in which is maintained from the main
supply a constant pressure. This cylinder is fitted with a piston or plunger and
communicates motion by means of a connecting rod crank and spindle, or other
means, to a three armed lever the middle arm of which (may stand outside and
clear of the two other arms or may project past them) moves between and engages
alternately with two collars which are fixed on the main valve spindle. The piston
rod of the engine cylinder carries a tappet which on the outward stroke comes in
contact with the outer of the three arms of the three-armed lever carrying it
forward and taking the crank connected with small cylinder over its dead centre.
The middle arm of the three-arined-lever has then engaged the outer collar on the
valve spindle; then the pressure in the small cylinder acting through its mechanism
forces the valve spindle outward and thus changes the position of the valves on the
main cylinder. The main piston rod in its reversed motion then returns the tappet
which engages the inner arm of the three-armed-lever and moves the crank
connected with small cylinder over its dead centre moving the piston in the sinall
cylinder back against the pressure in the main supply. The middle arm of the
three armed lever has then engaged the inner collar on the valve spindle and the
pressure in the small cylinder acting as before, forces the valve spindle inwards and
again changes the position of the valves on the main cylinder.
Dated this 25th dox of February 1895.
HENRY BARNETT.
ALFRED WILLIAM BARNETT.
Improved Means of Actuating the Slide Valves, or other Valves, for
the Admission and Discharge of Steam, Water, or Air to and from
the Cylinders of Reciprocating or Non-rotary Engines.
We HENRY BARNETT Machine Fitter and ALFRED WILLIAM BARNETT,
Locomotive Engine Fireman, both late of 64 Shawcross Street Higher Hillgate
but now of 60 Grimshaw Street Turncroft Lane, Stockport in the County of
Chester, do hereby declare the nature of this invention and in what manner the

page_text: same is to be performed to be particularly described and ascertained in and by
the following statement :-
The object of this invention is to provide means for actuating the slide or other
valves of reciprocating engines whereby the engine can be started in any position
even if it has been stopped upon the "dead-centre."
The nature of our said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference to
the drawing hereunto annexed and the following explanation thereof.
The drawing represents, for the sake of example or illustration, the application
of our invention to actuating an alternate oscillating four way valve in connection
with an engine cylinder mounted in a horizontal position, but it will be evident
that the same invention, or a modification thereof, would be equally applicable for
actuating other forms of valves and applied to cylinders in a vertical or other
position.
Referring to the drawing a is the main steam cylinder of the engine which is
fixed upon a bed b. On this bed is also fixed a small auxiliary cylinder c (shown
in section) which is connected by a branch pipe d to the main supply pipe e
leading from the boiler or other source of pressure, which also supplies the main
cylinder a so that the piston f'in the auxiliary cylinder c is subject to a constant
pressure.
9
The rod of this auxiliary piston is connected by means of a connecting rod
crank, and spindle i (or by other equivalent means) to a three-armed lever k k¹ k+
the spindle being carried in a fixed pedestal or bearing so that if the piston f
reciprocates it will communicate an oscillating motion to the said three-armed
lever, and vice versa.
The central arm k+ of the said lever may stand outside and clear of the two
other arms and or may project past them. The arm k+ moves between and
engages alternately with two collars or friction bowls m and m+ which are fixed on
the sliding valve rod n which is attached by the lever o to the oscillating four way
valve p.
The piston rod q of the main cylinder carries a tappet or bowl r which on the
outward stroke of the main piston (in the direction of the arrow) comes into
contact with the outer arm of the three-armed lever carrying it forward and
taking the crank connected with the small piston fover its "dead-centre."
The central arm + of the three armed lever has by this time engaged the outer
collar on the valve rod n and then the pressure of the steam or other motive
force in the small or auxiliary cylinder c forces the valve rod n outwards and thus
changes the position of the valve p of the main cylinder a.
The main piston rod q in its reversed movement then returns the tappet or bowl r
which engages the inner arm k of the three-armed lever and moves the crank .
connected with the piston f of the small cylinder c, back again over its "dead
centre" moving the piston back against the pressure in the main supply.
The middle arm k+ of the three-armed lever has then engaged the inuer collar
or friction bowl m on the valve rod n and the pressure in the small cylinder acting
as before forces the valve rod n inwards to its original position (as shown on the
drawings) and again changes the position of the valve pin connection with the
main cylinder a and so on alternately.
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 improved means for actuating the slide or other valves for the admission
and discharge of steam, water, or air to or from the cylinders of reciprocating or
non-rotary engines, consisting in the combination of a small piston working in an
auxiliary cylinder (connected with the same source of pressure as the main
cylinder) with a three-armed oscillating lever in connection with tappets or friction

page_text: bowls carried respectively by the main piston rod and the main valve rod of the
engine, all constructed and operating substantially as hereinbefore described and
illustrated by the drawing annexed.
Dated this 23rd day of November 1895.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicants.