A New or Improved Gas Regulating Valve and Pilot Light. Connection, applicable to "Bunsen" and analogous Burners.
Year: 1896

page_text: Date of Application, 2nd Mar., 1896-Accepted, 4th Apr., 1896:
COMPLETE SPECIFICATION.
A New or Improved Gas Regulating Valve and Pilot Light.
Connection, applicable to "Bunsen" and analogous Burners.
I WILLIAM MCCAIG of 665 Cathcart Road, Govanhill, Glasgow North.
Britain, Gas 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 :-
In describing my invention I shall for brevity confine myself to one form of its.
application; namely an incandescent gas burner although it is here explained my
invention may apply indiscriminately to all forms of Bunsen and analogous
burners.
Hitherto in burners of this type, the gas in order to supply the pilot light, has.
invariably been led through a by-pass placed in various positions behind the gas
cock or valve. The gas due to such arrangement is kept constantly burning at the.
pilot jet notwithstanding the gas at the main jet or jets is burning.
There are very grave objections to this arrangement, the most important of
which are the gas being unmixed with air is imperfectly consumed consequently
causing an undue waste of gas, and primarily the carbonising of the mantle.
rendering perfect incandescence of such impossible-takes place.
According to my improvements which I shall presently describe these serious.
defects are entirely obviated.
The plug of the regulating valve or cock is constructed with a three way port or
passage. The gas passing through the inlet port is conducted to either the pilot.
light port or the port or passage leading to the main jet or jets of the burner and
is so arranged that only one of such ports can be open at a time, and consequently
the gas can only burn at one or the other of the two jets aforesaid.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended an explanatory sheet of drawings in the three
figs. of which corresponding parts are marked with the same letters of reference.
Figure 1 illustrates in elevation a burner and fittings of the incandescent gas.
type with my invention applied thereto.
Figure 2 is a vertical section of the regulating valve or cock made in accordance.
with and constituting my said invention and
Fig. 3 is a part section of the barrel of the valve with the plug in plain-taken
at the underside.
A is the stopcock or valve, B is the plug with the through and through ports C
and D. E is the port leading to the pilot branch F. G is the Bunsen burner or
mixing chamber (Figure 1) which forming no part of my invention will only be
referred to when necessary to explain my improvements.
Referring to Figure 2, the dot and pick lines H and I show the key J of the.
plug B turned in the position to allow the gas to the pilot light being full on.
The dot and pick lines K, and L, show the position the said key J would be in.
when the gas was full on at the jets of the burner proper M.
It will be seen that the gas will remain burning at the pilot jet even though the
key Jis turned a greater augle and vice-versa with the main burner M, indeed, the
transition of the light from the pilot to the burner is so sudden and reliable that
it would be impossible to turn the key however suddenly and not leave the light.
burning at either the one or the other jet.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what mnuner the same is to be performed 1 declare that what I
claim is :-
In all kinds of Bunsen and atmospheric burners, regenerative and analogous
lamps to which pilot lights are adaptable, constructing the plug of the regulating
valve with a three way port or passage, through which the gas can pass to either
the pilot light or to the burner proper and to only one at a time, and in such
manner that the light is transferred from one jet to the other with a degree of
absolute certainty.
Dated this 29th day of February 1896.
WM. MUCAIG,
665 Cathcart Road, Glasgow, Applicant.