Improvements in or relating to Motor Engines worked by Gas or other Combustible Vapours.
Year: 1897

page_text: Improvements in or relating to Motor Engines worked by Gas or
other Combustible Vapours.
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JOHN DONGILL 87 Choir Street Broughton Lane Manchester Engineer do hereby
declare the nature of this invention to be as follows:-
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My invention, is for improvements in the method, of regulating the supply of gas,.
or combustable vapours and air, to the cylinder of a Motor Engine.
The object of the inventor is to prevent partial charges of gas, being, admitted to
the cylinder of an engine, at a time when full charges are required. The partial
charges reffered to occur, in consequence of the contact mechanism, operated by, the
governor, slipping out of contact, with the gas valve, and allowing it to close, before,
the propper quantity of gas, had passed to form the propper mixture, with air, which
was being admitted to compose, the succeeding combustible charge. I construct the
valves in such a manner that air will pass to the cylinder more freely, and the
in more definate quantities.
.
The valves employed as an illustration of a means of carrying my invention into,
effect, are of the ordinary mushroom, or tappet type with valve spindle working
through a guide in the valve box, the upper end of the spindle is enlarged in diameter
sufficient to seal the aperture in the valve box through which the gases pass. The
metal round the aperture refered to is known to the trade as the seat of the valve.
The upper end of the spindle is fitted to the seat perfectly air tight. In addition' to
such a valve, I cut a channel closely round the seat in the valve box; and into this!
channel I firmly insert a metal ring, the lower portion of the ring filling the channel:
and securing the ring in position, the upper portion of the ring stands con
considerably
above the valve seat. The upper portion of the valve spindle is made to slide a
perfect fit through the ring when being raised from its seat in the process of opening
the passage through the valve.
to be
COMPLETE SPECIFICATION.
Improvements in or relating to Motor Engines worked by Gas or
other Combustible Vapours.
JOHN DONGILL 87 Choir Street Broughton Lane Manchester 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:
My invention is for improvement in the method of constructing valves for
controling the supply of gas or combustable vapour to the cylinder of a Motor Engine,

page_text: of the same.
The object of the inventor is to prevent partial charges of gas being admitted to the
cylinder of an engine at a time when a full charge is required. . When the governor
is in the act of putting the cut out gear into contact for the purpose of opening the
gas valve, the thin edges of the hit and miss. devices sometimes slip out of contact
before the spindle has been moved the necessary distance to admitt a full charge of
gas, a small portion of gas has nevertheless passed, the valve, but not sufficient to
compose the proper explosive mixture, the result is that the insufficient quantity of
gas, renders the mixture with air inexplosive, and does not become ignited. The
result is that the gas valve is fully opened during the next cycle of the engine, and a
full charge of gas admitted to the cylinder, which combines with a portion previously
admitted but not ignited, rendering the mixture too highly explosive, resulting in
a severe shock to the engine. I will now describe a valve designed to obovate such
irregular charges of gas, the valve used may be of the ordnary mushroom or tappet:
kind, as shown in the drawing, Figure 1 is a sectional elevation, Figure 2 is a plau
The valve spindle marked A in the drawing, slides through the guide
marked B in the valve box. The upper end of the spindle A enlarged in diameter
at the part marked E sufficiently to seal the aperture marked C in the valve box
through which the gas passes to the cylinder. In addition to such a valve I cut a
channel closely round the seat of the valve box, and into this channel I insert a metal
ring, marked D in the drawing, the lower portion of the ring fills the channel which
secures it in possition, the upper portion of the ring remains somewhat above the
level of the valve seat, as shown in the drawing. The portion of the valve spindle
marked E is made the right diameter so that it will slide into the ring a perfect fit.
therewith, as the spindle is lowered upon its seat, when in the act of closing the.
aperture of the valve, this addition of a ring round the seat of an ordinary valve will
enable the spindle to be moved out of contact with the seat a considerable distance
before the gas will pass through the valve, it will be necessary to raise the top of
the spindle marked E cleare of the ring marked D before gas can pass the valve, and
by this contrivance all the accidental small moveinents of the spindle ceases to pass
the small but objectionable portions of gas reffered to herein. The ring described
may be formed out of the solid body with the valve box instead of being made
seperate and fixed as described.
3
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
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The application in combination of a ring and the seat of a valve as shown and for
the purpose described.