Improvements in or relating to Oil-feed Apparatus for Explosion Engines.
Year: 1899

page_text: Date of Application, 14th Nov., 1899
Complete Specification Left, 13th Sept., 1900-Accepted, 13th Oct., 1900
i
Improvements in or relating to Oil-feed Apparatus for Explosion
Engines.
I, ALEXANDER CHAIG, Chief Engineer of Messrs. Humber & Co. Ltd., of
Coventry, in the County of Warwick, do hereby declare the nature of this inven-
tion to be as follows:-
-
This invention relates to improvements in oil-feed apparatus for explosion
engines and has for its object the prevention of the liquid from overflowing at
the feed nozzle and the maintenance of the liquid therein at a constant level in
reference to that nozzle.
According to one method of carrying out this invention a pipe regulated by
a cock or valve supplies the carburettor tank, and an overflow pipe or orifice
communicates with the tank at the height at which it is desired to maintain
the liquid. A feed pipe extends from the carburettor tank to the feed nozzle.
This nozzle which may be adapted to any suitable spraying or vaporising
device, must be situated so that its upper end is at a slightly higher level than
that of the overflow.
It may easily be seen that instead of overflowing at the feed nozzle excess
liquid delivered into the carburettor tank would pass down by means of the
overflow to an overflow tank, and this may be pumped out or by any other
means emptied of the overflow oil, which may be saved and used again.
By the present invention the use of complicated apparatus such as that which
has been previously used and which has involved the employment of automatic
needle-valves, floats and other related moving parts is obviated. In running
tho valve of the supply-pipe is set to allow a constant flow to the carburettor
tank slightly in excess of that required by the engine working at full speed.
Jamalia 1800
COMPLETE SPECIFICATION.
Improvements in or relating to Oil-feed Apparatus for Explosion
Engines.
I, ALEXANDER CRAIG, Chief Engineer of Messrs. Humber & Company Limited,
of Coventry, in the County of Warwick, 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 improvements in oil-feed apparatus for explosion

page_text: engines and has for its object the prevention of the liquid from overflowing at
the feed nozzle and the maintenance of the liquid therein at a constant level in
reference to that nozzle.
According to one method of carrying out this invention a pipe regulated by
a cock or valvo supplies the carburettor tunk, and an overflow pipe or orifice
communicates with the tank at the height at which it is desired. to maintain
the liquid. A feed pipe extends from the carburettor tank to the feed nozzle.
This nozzle which may be adapted to any suitable spraying or vapourising
device, must be situated so that its upper end is at a slightly higher level than
that of the overflow.
It may easily be seen that instead of overflowing at the feed nozzle excess
liquid delivered into the carburettor tank would pass down by means of the
overflow to an overflow tank, and this may be pumped out or by any other
means emptied of the overflow oil, which may be saved and used again.
By the present invention the use of complicated apparatus such as that which
has been previously used and which has involved the employment of automatic
needle-valves floats, and other related moving parts is obviated. In running
the valve of the supply-pipe is set to allow a constant flow to the carburettor
tank slightly in excess of that required by the engine working at full speed.
In the accompanying drawings
Figure 1 is a plan of one construction of liquid fuel feed apparatus according
to this invention, and
Figure 2 is a longitudinal vertical section on the line 2-2 of l'igure 1.
Like letters indicate like parts throughout the drawings.
A is a carburetting or vapourising chamber having a feed nozzle A' through
which liquid passes to the chamber from a carburettor tank B by means of
a conduit A. The carburettor tank B is fed with liquid fuel through a supply
pipe C controlled by a cock C, and is provided with a cover B' having a vent B³.
This pipe C communicates with a supply tank, which is however not shown
in the drawings. An overflow outlet is provided within the tank B and this
outlet communicates by means of a pipe with an overflow tank (not shown
in the drawings) at a lower level. From this overflow tank the fuel may be
pumped or otherwise returned to the supply tank.
The overflow outlet B³ within the tank B is preferably at a slightly lower
level than the orifice of the feed nozzle A' in the carburetting chamber A, and
thus all danger of the liquid overflowing at the feed nozzle is avoided, for as
soon as the liquid reaches to the level of the overflow outlet B³ it will of course
pass away through the pipe D.
In operation the fuel is drawn in the usual manner from the feed nozzle A'
by the incoming air which enters through the passage A, the charge then passing
to the cylinder through the conduit A.
14
Although oil has been mentioned as the fuel in this specification, it is to be
understood that the term oil" is merely used for convenience and is held
to include spirit or similar liquid fuel.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
:
1. In liquid fuel feed apparatus for explosion engines the combination with
the carburettor tank of a fuel level regulator substantially as described.
2. In liquid fuel feed apparatus for explosion engines the combination of
a carburettor tank having an overflow opening with a feed nozzle through
which the fuel passes to the carburetting or vapourising chamber.
3. In liquid fuel feed apparatus for explosion engines the combination with
a carburettor tank having an overflow opening of a vapourising chamber having
a feed nozzle the orifice of which is at a slightly higher level than the overflow
opening.
L

page_text: 4. In liquid fuel feed apparatus for explosion engines the combination with a
liquid fuel supply tank and a carburettor tank having an overflow outlet of
means to return the fuel escaping by the outlet to the supply tank.
5. The complete liquid fuel feed apparatus substantially as described and
illustrated in the accompanying drawings.
1
101
1
1000
ALEX. CRAIG.
Boult, Wado & Kilburn,
Agents for the Applicant.