Improvements in Valve Gear for Motive Power Engines.
Year: 1891

page_text: Date of Application, 21st July, 1891
Complete Specification Left, 20th Apr., 1892-Accepted, 21st May, 1392
PROVISIONAL SPECIFICATION.
Improvements in Valve Gear for Motive Power Engines.
We, URIAH WHATLEY, JOHN WHATLEY and ROWLAND HERBERT SMITH,
all of Pewsey, in the County of Wilts, Engineers, do hereby declare the nature of
this invention to be as follows:-
This invention for improvements in valve gear for motive power engines has for
its object to drive the valve from a single eccentric in such manner that the
engine can be reversed and the speed or power regulated as readily as when two
eccentrics and the ordinary link motion are employed as is usual.
In a valve gear constructed according to this invention, a single eccentric fixed
on the engine shaft has its rod pivotted to one end of a curved slotted lever or link
itself pivotted at the centre of its length to an arm capable of being revolved to a
limited extent round the axis of the engine shaft by means of a handle which can
be fixed in any position by means of a notched sector and a spring catch in the
ordinary manner. The link and eccentric strap can thus be revolved round the
engine shaft to a limited extent by means of the handle. A block sliding in
the link is connected to the valve rod in the ordinary manner.
It will be readily understood that when the sliding block is at the end of the link
adjacent to the rod of the eccentric that the engine will revolve in one direction,
that when the link is moved by its regulating arm so that the sliding block is in
the centre of the link, that is adjacent to the pivot of its regulating arm, the valve
will have no motion and that when the link is moved so that the sliding block is in
the opposite end of the link from the rod of the eccentric the engine will revolve
in the opposite direction; also that by putting the link in any intermediate position
the power or speed can be regulated as desired.
nu: ɔlai dau of Tulo 1901
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Valve Gear for Motive Power Engines.
We URIAH WHATLEY, JOHN WHATLEY and ROWLAND HERBERT SMITH
all of Pewsey, in the County of Wilts Engineers 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 for improvements in valve gears for motive power engines, has
for its object to drive the valve from a single eccentric in such a manner that
the engine can be reversed and the speed or power regulated as readily as when
two eccentrics and the ordinary link motion are employed as is usual.
In a valve gear constructed according to this invention, a single eccentric fixed
on the engine shaft has its rod pivotted to one end of a curved slotted lever or
link, itself pivotted at the centre of its length to an arm, capable of being revolved
to a limited extent round the axis of the engine shaft by means of a handle which
can be fixed in any position by means of a notched sector and a spring catch in the
ordinary manner. The link and eccentric strap can thus be revolved round the
engine shaft to a limited extent by means of the handle. A block or bracket in
which the link slides is connected to the valve rod in the ordinary manner.
It will be readily understood that when the sliding block is at the end of the
link adjacent to the rod of the eccentric that the engine will revolve in one

page_text: direction, that when the link is moved by its regulating arm so that the sliding
block is in the centre of the link, that is, adjacent to the pivot of its regulating
arm, the valve will have no motion, and that when the link is moved so that
the sliding block is in the opposite end of the link from the rod of the
eccentric the engine will revolve in the opposite direction also that by putting
the link in any intermediate position the power or speed can be regulated as
desired.
In the accompanying sheet of illustrative drawings
:
Fig. 1. represents a side elevation of a valve gear constructed according to this
invention and
Fig. 2. is a plan of the same.
A single eccentric a fixed on the crank shaft has its rod c pivotted to a link d,
itself pivotted to arms e capable of being revolved round the axis of the crank
shaft by means of a hand lever acting through the rocking lever fand links g in
the usual manner. A block or bracket through which the link d slides is connected
to the valve rod working in the bracket by the trunnion journals m oscillating in
the pedestal ends n.
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 :-
1. A. valve gear for motive power engines comprising, a single eccentric fixed on
the crank shaft and connected to a link pivotted to arms capable of being revolved
about the axis of the crank shaft substantially as described and for the purpose
specified.
2. The arrangement and construction of valve gears for motive power engines
substantially as described with reference to the drawings.
Dated this 20th day of April 1892.
WHEATLEY & MACKENZIE,
40, Chancery Lane, W.C., Agents.