Improvements in Governing-apparatus for Engines in which Gas or Vapour and Air are Used
Year: 1896

page_text: Date of Application, 18th Jan., 1896-Accepted, 29th Feb., 1896
COMPLETE SPECIFICATION.
Improvements in Governing-apparatus for Engines in which Gas or
Vapour and Air are Used
We, ALF DOUGILL, of No. 5, Vernon Road, Leeds, in the County of York,
and JOHN MARKS of Roswill Terrace, Leeds, aforesaid, 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:-
The object of this invention is to provide means for so regulating the supply of
gas or vapour and air to the combustion-chambers of engines adapted to be worked
by combustible fluid (hereinafter referred to as a gas or like engine) as to ensure
that at each forward stroke of the piston the proper amount of propulsive energy
will be generated to keep the engine running uniformly under varying loads.
Fig. 1 of the accompanying drawings is an end view of a gas-engine cylinder
provided with governing-apparatus according to our invention, and
Fig. 2 is a side elevation thereof.
Fig. 3 is another side elevation showing the governor placed at the outer end of
the cylinders.
In all the views similar letters refer to corresponding parts.
a is a bell-crank lever arranged to oscillate on a stud b carried by a bracket b¹
furnished at the end c with two similar regulating-screws d and d' of which one is
arranged directly under the extending pin e of the mushroom gas-valve f, and
the other under the extending ping of the mushroom air-valve h. The other
end of the lever a carries a stud i which is parallel to the stud b and on which a
sleeve k fits loosely so as to be capable of being moved endwise by the long arm / of
a bell-crank lever, which is mounted loosely on a stud m carried by the governor-
bracket n. This lever engages with its arm / between two collars or flanges o and p
provided on the sleeve k and with its short arm q, between two collars or flanges s
and of the governor-sleeve r. On the other end of the sleeve k is provided a
collar or flange t arranged to be struck by a step-cam u secured on the outer end of
the side-shaft that drives the governor w and receives motion from the crank-
shaft in the usual manner. The movement of the sleeve k along the stud i effected
by the governor is such that the step-cam u by striking the collar or flange t on
the sleeve k, always operates the lever a in such a manner as to cause the gas and
air valves to be lifted by the screws d and d 1 to the proper extent to give just the
quantity of gas and air necessary for producing the explosive force at each stroke
to ensure uniformity in the speed of the engine.
On starting the engine the sleeve k is in the position shown. The sleeve k is now
moved forward by the governor until the speed becomes normal, when one of the
lower steps of the cam u strikes the collar or flange t. Should the work of the
engine be increased or decreased the governor would slide the sleeve k on the stud i
into such a position that a higher or lower step on the cam respectively would
strike the collar t and that, more gas and air being consequently given, the speed
would be kept uniform.
As will be evident instead of the step cam u, its equivalent such as a part cone
might be used. Furthermore our apparatus might obviously be employed to control
the supply of air only or of gas or vapour only instead of both the air and the gas
or vapor. Instead of placing the governor vertically, as shown, it may conveniently
be placed on the end of the side shaft v and arranged to operate the sleeve k direct,
as shewn in Fig. 4.