Improvements in Oil Engines.
Year: 1894

page_text: Date of Application, 7th Dec., 1394
Complete Specification Left, 23rd July, 1895-Accepted, 24th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvements in Oil Engines.
We, GEORGE POLLOCK and MATTHEW WHYTE, both of The Globe Gas
Engine Works, Hunter Street, in the City of Glasgow, Engineers, do hereby
declare the nature of this invention to be as follows:-
This invention relates to oil engines working on the same principle as the gas
engine in which the action of the piston takes in the quantity of air and oil
required for the explosion. The explosions are regulated by means of trip or
governing mechanism composed of a valve that is pressed to admit oil by opening
inwards against the action of a light spring which keeps the valve normally closed
and which is pushed inwards by the action of the angled point of a reciprocating
tappet lever fulcrumed on one end of a beam or other equivalent lever actuated
by a cam and anti-friction pulley to push this lever inwards against the power of
a spring serving to keep the tappet lever out of action except when pushed in by
the cam.
The cam is mounted on a shaft geared to rotate once for each double
stroke of the engine, and the free end of the tappet lever reciprocates on an
inclined guide rest. The engine is then working at its full power and the cam
rotating at the desired minimum velocity the tappet lever always takes into a
notch on the valve spindle and presses it inwards to open the oil valve at every
second stroke of the piston but it is so adjusted that whenever the engine and cam
shaft rotates at a few revolutions above its normal velocity the tappet lever comes
forward at such a velocity over the apex of its angled guide that it misses the
valve spindle and allows the engine to go away without the admission of oil, for
one or more strokes until the engine is reduced to its proper speed. The
adjustment of the apex of this guide part is difficult and requires great care in
construction and part of our improvement consists in this being connected to the
combustion chamber and in mounting this angled rest in a vertical slide guide
in a bracket beneath and in front of the valve spindle with a thumb screw
spindle or other equivalent such as a wedge which will raise and lower the
inclined guide on which the tappet rests to adjust it to the finest increments in
height to suit the velocity desired of the engine.
We also carry a tube preferably of conical form through the combustion
chamber, the said tube being made of iron, copper, alloy, porcelain, or any other
easily heated material which upon the application of external heat rapidly
vaporizes the oil and allows the engine to be started in a very short time. On
the end of the cylinder we form a double casing or chamber which serves for the
double purposes of keeping the cylinder cool and also of heating the air before
passing into the cylinder. Two or more passages are provided connecting the
combustion chamber and cylinder.
T
L1001

page_text: We, GEORGE POLLOCK and MATTHEW WHYTE, both of The Globe Gas
Engine Works, Hunter Street, in the City of Glasgow, 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 relates to oil engines working on the same principle as the gas
engine in which the action of the piston takes in the quantity of air and oil
required for the explosion.
The invention is illustrated by the accompanying drawings, Figure 1 being au
end view, Fig. 2 a side elevation, Fig. 3 a vertical section, and Fig. 4 a plan of
that part of an oil engine to which the improvements relate, and which is
constructed in accordance with our invention.
The explosions are regulated by means of trip or governing mechanism composed
of a valve fitted in a combustion chamber or vaporizer A said valve having its
spindle B protruding through to the outside of the vaporizer A and being pressed
inwards, against the action of a light spring which keeps the valve normally
closed, to admit the necessary charge of oil. The valve spindle B is pushed
inwards by the action of the angled point of a reciprocating tappet lever C
fulcrumed on one end of a beam or other equivalent lever D actuated by a
cam E and antifriction roller F to push this lever inwards against the power
of a spring F serving to keep the tappet lever C out of action when pushed
in by the cam E. The cam E is mounted on a shaft G geared to rotate once
for each double stroke of the engine, and the free end of the tappet lever C
reciprocates on an inclined guide rest H. The adjustment of the apex of this
guide part His difficult and requires great care in construction, and part of
our improvement consists in this being connected to the combustion chamber A
and in mounting it on a vertical slotted slide guide J beneath and in front of
the valve spindle with a thumb screw spindle L to secure the guide H upon
its guide J in the position desired or any other equivalent such as a wedge
may be employed which will raise and lower the inclined guide H on which
the tappet Crests to adjust it to the finest increments to suit the velocity
desired of the engine. When the engine is working at its full power and the
cam E rotating at the desired minimum velocity the tappet lever takes into
a notch on the valve spindle B and presses it inwards to admit the oil at
every second stroke of the piston but it is so adjusted that whenever the engine
and cam shalt G rotates at a few revolutions above the normal velocity the
tappet lever comes forward at such a velocity over the apex of its angled
guide II that it misses the valve spindle B and allows the engine to go away
without the admission of oil for one or more strokes until the engine is reduced to
its proper speed.
Through the combustion chamber A a tube M preferably of conical form is
carried, the said tube M being made of iron, copper, alloy, porcelain or any other
easily heated material which upon the application of external heat rapidly
vaporizes the oil and allows the engine to be started in a very short time.
On the end of the cylinder N we form a double casing or chamber which
serves for the double purpose of keeping the cylinder N cool and also of
heating the air admitted from the atmosphere before passing into the cylinder.
Two or more passages P are provided connecting the combustion chamber A and
cylinder N.

page_text: 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. An oil engine the parts of which are constructed combined and arranged to
operate substantially as described with reference to the drawings annexed.
2. In an oil engine the combination of the adjustable slotted guide H and tappet
lever C arranged and operated to travel over said guide and to control or govern the
supply of oil to the combustion chamber substantially as and for the purpose set
forth.
Dated this 22nd day of July 1895
WALLACE FAIRWEATHER,
Chartered Patent Agent,
62 Saint Vincent Street, Glasgow, Agent for the Applicants.