A New or Improved Valve Motion for Steam Winches and other Engines.
Year: 1899

page_text: Date of Application, 19th Sept., 1899
Complete Specification Left, 19th June, 1900-Accepted, 15th Sept., 1900
PROVIDIUNAL DIECIFICATION.
A New or Improved Valve Motion for Steam Winches and other
Engines.
I, CHARLES WILLIAM ALEXANDER TAYLOR, Engineer, Sunnyside Road, Alloa,
Clackmannanshire, and DAVID SMAIL, Consulting Engineer, 2, Edelweis Ter-
race, Partick, Glasgow, Lanarkshire, do hereby declare the nature of this inven-
tion to be as follows, that is to say:-
Our said invention has for its object to improve the motion actuating the
slide or other distributing valves for steam cylinders of winches or other engines.
In carrying out our invention we use preferably a spindle or shaft herein after
called A which passes through suitable stuffing boxes in valve chest a cover of
same having at its ends eccentric pulleys or pins working in suitable recesses or
projections on back of valves and placed at such position one to another that
by revolving A the valves have the desired motion for opening and closing the
steam ports in cylinders.
On A is placed a pulley or toothed wheel herein after called B loose on shaft
but having two stops herein after called C and D to work against a corespond-
ing recess or projection in shaft A so arranged that when B has the stop C against
projection or recess in A the valves are open to cause the engine or winch to
revolve to the right and when B has the stop D against projection or recess
in A the valves are open to cause the engine or winch to revolve to the left.
The pulley or toothed wheel B on shaft A is connected with the crank shaft
of winch or engine by toothed gearing or chain belt so arranged that B shall
have the same motion & velocity as crank shaft.
The shaft A is turned to & from the stops C and D in pulley or toothed
wheel B by suitable hand gear.
A New or Improved Valve Motion for Steam Winches and other
Engines.
We, CHARLES WILLIAM ALEXANDER TAYLOR, Engineer, of Sunnyside Road, Alloa,
Clackmannanshire, and DAVID SMAIL, Consulting Engineer, of 2, Edelweis Ter-.
race, Partick, Glasgow, Lanarkshire, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention has for its object to improve the motion or gear actuating the
slide or other distributing valves of steam cylinders of winches and other engines.

page_text: It is designed as a substitute for the ordinary link motion, and will act as a
reversing motion for the engine or will render the slide valve inoperative.
The invention will be understood from the following description, reference
being had to the accompanying drawings, in which,
Figure 1 is a general view of the apparatus as applied to a winch;
Figure 2, a detail view of the eccentric device for operating the valve.
In carrying the invention into effect, we use a spindle or shaft A passing
through suitable stuffing boxes B in the valve chest of the steam cylinder D.
The ends of this shaft are fitted with eccentric discs or cams E, these cams work-
ing in suitable recesses F in back of valve I and so placed relatively to one
another that by revolving the shaft A, the valves have respectively the required
motion for opening and closing the steam ports in cylinders. G is the crank
shaft of the winch and H a cross shaft connecting the two shafts A and G
together by means of bevel or other gear. The rotation of the shaft G there-
fore will operate through the shafts A and H the slide valves I of the cylinder.
In order to reverse the engine or render the valve motion inactive, we provide
the following arrangement:
-
On the shaft A is placed the wheel J of the bevel or other gear. This wheel
is loose on the shaft, but is provided with two stops or projections Q and R, and
there is a corresponding pin or abutment P on the shaft A so arranged that when
the gear wheel J has its stop R against the projection P on the
shaft A, the valves are open to cause the engine or winch to revolve
in one direction. The wheel J will thus drive the shaft A through the abut-
ment P on the shaft and so put in motion the slide valve which drives the
engine. If however the valve spindle A be rotated so as to bring the pin P
against the stop Q, the rotation of the spindle shifts the position of the slide
valve, and the engine or winch will consequently revolve in the opposite direc-
tion.
The toothed wheel J, or its equivalent (if other form of gear wheel be used)
on shaft A, is connected with the crank shaft G of the winch or engine by any
suitable form of gearing, such as toothed gear, screw gear, chain gear, etcetera.
In either case, however, it is arranged that the shaft A shall be driven with
the same motion or velocity as the crank shaft G.
Any suitable hand gear can be used to rotate the shaft A in order to bring
the pin P into contact with one or other of the stops Q and R. In the draw-
ings a hand-wheel S is shown, but it is obvious that other means may be used
for turning the shaft A if so desired. It is obvious that the two stops may be
on the shaft, and the single abutment on the gear wheel, instead of the other
arrangement. The one is merely a mechanical equivalent of the other.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. In valve motions for steam winches and other engines, the combination
with the slide valve, of a rotary valve spindle or shaft, a rotary cam disc secured
eccentrically at ends of said shaft and engaging recesses on back of slide valves,
and means for rotating said shaft and cam discs, whereby the rotation of same
will impart to the valves a reciprocating movement for opening and closing the
cylinder ports, substantially as described.
2. In slide valves for steam engines that are driven from a crank shaft by
means of bevel or other gear, arranging the rotary valve spindle in such a
manner that it shall have a certain amount of rotary movement or play on the
shaft independently of the bevel or other gear which drives it, whereby the
valve can be put in advance of the crank for a forward movement of the engine,
behind the crank for a backward movement, or in mid position to render the
valve inoperative, substantially as described.
3. The combination with the valve shaft, of a gear wheel mounted loosely

page_text: thereon, stops or abutments on the shaft and on the gear wheel so arranged as
to couple the two together and enable the wheel to drive the shaft, but yet
allow the shaft a certain amount of play, and means for turning the shaft by
hand, whereby the valve can be put in advance of the crank to drive the engine
in a forward direction or turned an equal distance behind the crank so as to
reverse the motion, substantially as described.
4. The improved valve motion for steam winches and other engines, con-
structed, arranged and operating substantially as hereinbefore described with
reference to and shown in the drawings annexed.
Dated this loth day of June.
WM. P. THOMPSON & Co.,
Patent Agents, of Liverpool Manchester, Birmingham & London.