An Improved Regulating Device for Petroleum Motors.
Year: 1898

page_text: Date of Application, 4th May, 1898-Accepted, 11th June, 1898
COMPLETE SPECIFICATION.
An Improved Regulating Device for Petroleum Motors.
I, ERNST ELIS FRIDOLF FAGERSTRÖM, of 22, Pipersgatan, Stockholm, Sweden,
Mechanical Engineer, 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:.
Petroleum-motors are usually regulated by a governor, which when the velocity
of the motor increases above the normal, actuates an arrangement that shuts off
the supply of petroleum and keeps the discharge valve open, an explosion being
thus omitted and the piston only sucking in air. The principal inconveniences
of this mode of regulating such petroleum-motors as are not provided with a lamp
for heating the ignition-tube and vaporizer, are irregular running, when the load
is irregular, and the necessity of readjusting the regulator when the load is
increased or decreased to any material extent.
The present invention relates to a regulating device by which the supply of
petroleum is not cut off entirely but only diminished and the supply of air is
decreased in the same ratio. By this procedure the inconveniences above referred
to are avoided.
My improved regulating device comprises a wedge-shaped piece or slider
arranged to be moved to and fro on a plane and to regulate the length of stroke of
the plunger-rod of the petroleum supply pump.
To permit of the regulation of the supply of air simultaneously with that of the
petroleum, I combine, with the said wedge-shaped piece or slider, suitable means
whereby, when the same is moved in either direction, a valve in the air-supply
pipe will be operated so as to regulate the air-supply.
In the accompanying drawing I have shown how my said invention may be con-
veniently and advantageously carried into practice.
Figure 1 is a longitudinal section through the air valve-chamber of a petroleum-
motor, with parts of my improved regulating device shown in side elevation.
Figure 2 shows a sectional plan of the said air-valve-chamber.
Figure 3 is a sectional elevation showing other parts of my improved regulating
device hereinafter referred to.
A rod or spindle c (Figure 1), which is capable of oscillation about its axis, and
the upper end of which extends into a valve-chamber d arranged in the air-supply
conduit d (Figures 1 and 2), is actuated, by means of a rod or the like, by the
governor of the motor. On the rod c is fixed an arm a which, by means of a rod e,
is connected with a wedge-shaped piece or slider b movable to and fro on a plane
in a guide-way f. The rod e is preferably pivotally connected both to the arm a
and to the slider b. An oscillating valve h fast upon the rod c opens or closes one
of the orifices of the valve-chamber, d as the said rode is turned. The rod c may,
however, be made to actuate a valve in any suitable manner for the purpose of
regulating the supply of air.
A cam 7 is fixed on a shaft k, (Figure 3) which is rotated from the crank-shaft
of the motor. Into the path of the said cam extends a lever n which is provided
at one end with a roller i and is pivotally supported on a pin p in a bracket m.

page_text: The other end of the lever n bears against a collar o on the plunger-rod o¹ of
the pump which supplies the petroleum. The plunger-rod o¹ is kept depressed by
a spring q. Underneath this end of the lever is located the above-mentioned plane
or guide-way and the slide b movable thereon, the said slider bearing against the
part g of the lever n.
The slider b and the plane or guide-way f may equally well be located at the
other end of the lever, but, in such a case, it must be above the latter, with the
slider inserted between the lever and the plane. The slider may, if desired, be
adapted to move between the plane f and a collar, arm or the like, located above it
and attached to the plunger-rod, also the lifting of the plunger-rod may likewise
be brought about in any convenient manner.
When the governor, actuated by variations of the speed of the motor, causes the
rode to turn about its axis, both the air-supply and the petroleum-supply are
regulated simultaneously, the former by the valve h being moved so as to cover
more or less of the orifice of the valve-chamber d, and the latter by the slider b
being moved along the plane f, thus limiting the length of stroke of the plunger-
rod.
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:-
First. A regulating device for petroleum-motors, comprising a wedge-shaped
piece or slider mounted upon a plane and adapted to be moved between the said
plane and a lever for operating the petroleum supply pump by engaging with a
projection on the plunger-rod thereof, substantially as described for the purpose
of regulating the length of stroke of the pump.
Second. A regulating device for petroleum motors, comprising a wedge-shaped
piece or slider mounted on a plane and adapted to be shifted between the said plane
and a projection, arm or the like upon the pump-plunger, substantially as
described.
Third. A regulating device for petroleum motors, comprising a wedge-shaped
piece or slider movable upon a plane for the purpose of limiting the stroke of the
petroleum-pump, and connected by means of a rod with an arm fixed on an oscil-
lating spindle, which is actuated by the governor and is connected with a valve
located in the air-supply conduit, for the purpose of effecting a simultaneous
regulation of the supply of air and petroleum, substantially as described.
Dated the 4th day oŷ AHY LOO
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.