Improved Means for Controlling the Supply of Gas to Burners.
Year: 1895

page_text: Date of Application, 11th Nov., 1895
Complete Specification Left, 6th Aug., 1896-Accepted, 19th Sept.,
1896
Improved Means for Controlling the Supply of Gas to Burners.
I, GEORGE GATTON MELIUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, Civil Engineer, do hereby declare the nature of this invention to
be as follows :-
-
This invention relates to means specially, but not exclusively, applicable to gas
brackets, pendants and the like, for facilitating the instantaneous restriction of
the supply to a predetermined amount or its entire interception; the one or the
other result depending upon whether the plug be turned "home" in the one or in
the other direction.
According to one mode of carrying out my invention, I form chases in the
external surface of the plug and the internal surface of the shield; same being
arranged in such a manner that, in one "off" position of the plug, the supply
is entirely interrupted; whilst in the reverse "off" position of the plug, the
chases form a by-pass which allows sufficient gas to pass to support a small
flame.
In order to indicate the position the plug should assume in order to entirely
shut off the supply of gas or to bring the by-pass into operation, as the user inay
desire, the opposite sides of the crutch or other handle may be marked with the
words "OFF" and "LOW" respectively.
Where the tap is intended to be used with the axis of the plug horizontal, I
prefer to form the handle as a disc which works over a diso formed on the shield.
The face of the latter bears the words "SHUT," "OPEN" and "LOW," or
simply "OFF" and "LOW"; one or another of these words being exposed to
view through a slot in the outer disc according to whether the plug is turned to
shut off the main supply, to permit its free passage, or to bring the by-pass into
operation.
Dated the 11th day of November 1895.
COMPLETE SPECIFICATION.
Improved Means for Controlling the Supply of Gas to Burners.
I, GEORGE GATTON MELHUISH HARDINGHAM, of 191, Fleet Street, in the
City of London, England, Civil 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 :-
This invention relates to means specially, but not exclusively, applicable to gas-
brackets, pendants and the like, for facilitating the instantaneous restriction of
the supply to a predetermined amount or its entire interception; the one or the
other result depending upon whether the plug be turned "home" in the one or in
the other direction.
In the accompanying drawings are illustrated gas-taps embodying my
improvements;
Fig. 1 being an elevation and Fig. 2 a horizontal section of a vertical plug tap.
[Price 8d.1

page_text: 1
.
Figs. 3 and 4 are corresponding views, the plug being however turned to the
opposite position.
Fig. 5 is a face view, Fig. 6 a side view and Fig. 7 a vertical section of a tap
embodying the same means for regulating the supply, but having the plug disposed
horizontally instead of vertically.
According to the method of construction illustrated in Figs. 1 to 4, I form in
the plug ba passage a which communicates with the bore or hole 6 through the
plug and in the internal surface of the shield or shell d, I form a chase c; the
Baid passage and chase being arranged in such a manner that, in one
"off" position
of the plug (Figs. 3 and 4), the supply is entirely interrupted; whilst in the
roverse "off" position of the plug (Figs. 1 and 2), the passages form a by-pass
which allows only sufficient gas to pass to support a small flame. In this design, a
fine hole extends from the bottom of a cavity through the body of the plug into
the bore hole, the fine hole constituting the contracted portion for restricting the
supply of
gas.
According to the design represented by Figs. 5, 6 and 7, a chase a of restricted
area is formed in the surface of the plug and communicates circumferentially
with the bore hole through the plug. This arrangement, whilst capable of
accomplishing precisely the same result, is less reliable, when grease is employed in
rendering the tap gas-tight, owing to the risk of choking.
It will be observed that the formation of the by-pass passages affects only one
side of the plug and only one side of the cavity in the shell. Thus, when the plug
is in the "off" position there is against a perfect half of the shell an unmutilated
half of the plug for the prevention of leakage.
In order to indicate the position the plug b should assume when it is desired to
bring the by-pass into operation or to entirely shut off the supply of gas, the
opposite sides of the crutch e or other handle may be respectively marked with
the words "LOW" and "OFF" (Figs. 1 and 3).
66
Where the tap is intended to be used with the axis of the plug horizontal
(Figs. 5, 6 and 7), I prefer to form the handle as a disc'e', which works over a
disc d¹ formed on the shield or shell. The face of the latter may bear the words
"SHUT," OPEN" and "LOW," or simply "OFF" and "LOW"; one or
another of these words being exposed to view through a slot or opening in the
outer disc el, according to whether the plug is turned to shut off the main supply,
to permit its free passage, or to bring the by-pass into operation. A pin e
which projects from the back of the disc e¹ works over a reduced portion d² of
the circumference of the disc d'; and operates to limit the movement of the
disc e¹.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I claim:-
1. The improved by-pass gas-tap constructed substantially as herein described
and having a chase or passage formed in the plug and a chase formed in the
shield.
2. The improved by-pass gas-tap constructed substantially as herein described
and having a chase or passage formed on one side of the plug and a chase formed
on one side of the cavity in the shell, the opposite sides, or those which are together
when the tap is in the "off" position, being unmutilated.
3. By-pass gas-taps constructed substantially as herein described and provided
with means for clearly distinguishing the "low" from the "off" position of the
plug.
Dated this 6tli day of Aust 1806
G. G. M. HARDINGHAM..