An Improved Pilot Gas Cock.
Year: 1894

page_text: Date of Application, 1st Feb., 1894
Complete Specification Left, 22nd Mar., 1894-Accepted, 30th June, 1894
An Improved Pilot Gas Cock.
We JOHN CAMERON HALLIDAY 12 Grainger Street Newcastle-on-Tyne
Clapton Light Manufacturer Gas Lighting Engineer and Plumber and HENRY
FENTON Brass Finisher of 23 Douglas Terrace Newcastle-on-Tyne do hereby
declare the nature of this invention to be as follows:-
This invention will allow two separate streams of coal gas to issue out of one
stop cock or valve, so arranged that when one supply is turned full on, the other
will be cut entirely off, and yet will allow the light from the one to ignite the gas
at the other before either are closed.
When several gas burners are together for lighting or heating purposes, this
improvement is to permit one or a few jets only to be used when no more are
required. Thus a "pilot" light or "bye pass can be obtained.
"
Then by an additional move of the lever or key of the cock the gas can be
turned full on to all the other burners. Also all gas can be shut completely
off. By this plan the use of two separate gas cocks can be avoided.
These advantages are secured by a gas cock or valve having its plug or moving
part so drilled or grooved, that apart from the usual through-way course, a stream
of gas can come out at one or both ends of the plug, or out at one or both sides of
the barrel or body of the cock.
Then from any one or more of these apertures gas can be conveyed by an elbow
or tubes to one or more burners.
January 31st 1894.
JOHN CAMERON HALLIDAY.
HENRY FENTON.
COMPLETE SPECIFICATION.
An Improved Pilot Gas Cock.
We, JOHN CAMERON HALLIDAY, Gas Lighting Engineer of No. 12 Grainger
Street, and HENRY FENTON 23 Douglas Terrace, Brass Finisher, both in the City
and County of Newcastle-on-Tyne, 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 an improved pilot gas cock and has for its object the
construction of a cock which shall enable two separate streams of gas to issue out
of one stop-cock or valve so arranged that when one supply is turned full on the
other may be cut off entirely in such a manner as to allow the light from one to
ignite the gas at the other or others before either are closed.
"
When several gas burners are arranged together for lighting or heating purposes
our invention will permit one or a few jets only to be used when no more are
required. Thus a "pilot" light or "bye-pass can be obtained. By an additional
movement of the actuating lever or key of the cock the gas can be turned full on
to all the other burners or in like manner all gas can be completely shut off.
By these means the use of two separate gas cocks can be avoided.
These results may be obtained by a gas cock or valve having its plug or moving
part so drilled or grooved that apart from the usual through-way course a stream
of gas can come out at one or both ends of the plug or out at one or both sides of
Pries 8d.1

page_text: the barrel or body of the cock, so that from any one or more of these apertures
gas can be conveyed by an elbow or tubes to one or more burners.
We will fully describe our invention with reference to the accompanying
drawings in which Figures 1 and 2 show in elevation two views at right angles to
each other of a multiple-jet gas burning or lighting device; Figure 3 shows in a
elevation a modified form of same and in the following description like marks of
reference designate like parts. Referring to the drawings A is the tube supplying
gas to for example four main burners or jets A¹ and to the pilot gas jet 2. The
burners A are arranged sufficiently near to each other so that when one burner is
lighted the flame from it may extend so as to light the others. C is the gas plug
or cock controlling the passage of gas from the tube A to the elbows E leading to
the burners A¹ and from the tube A through cock C to the pilot-jet 2 as herein-
after described. A lever or key L is provided on the cock for turning it and short
chains F may if desired be linked to the lever for facilitating its working. The
cock will of course be provided with the usual stops for checking the extent of its
rotation.
The lever L may be provided with a single registering pointer R (Figure 1) or
with two pointers R' R' as shown in Fig. 3. When the pointer R is vertical as in
Fig. 1, this indicates that gas is turned on to the burners A' and shut off' from
the pilot jet 2. In Figure 3, a pilot jet 2ª is shown carried out from the side of the
cock barrel and is a fixture. A groove cut in the side of the cock in this case
affords communication between the gas supply tube A and the fixed pilot pipe 2ª.
The pointer R' in Fig. 3 shows that the gas is turned on to pilot only, the
This arrange-
pointer R indicating that gas is turned off from the main cluster.
ment of fixed pilot may obviously be duplicated if so required.
Now supposing it is required for any purpose to shut off the gas from the
burners A and to light the pilot jet only, by pulling the lever L over until the
pilot jet 2 shown in a slanting position in full lines in Figure 1 assumes the vertical
position shown in Figure 2 the cock C will have been turned a certain distance
and the through communication between A and E will have been closed while
another small gas-way G drilled in the body of the cock C will have been brought
opposite the tube A so that gas can flow from A through G and along the inside
of the cock to the pilot jet 2 and before the gas burning at A' has been extin-
guished by the gradual closing of the cock the gas issuing from 2 will have been
ignited so as to supply a single gas-jet as required.
In like manner it is obvious that the opposite end 0 of the cock C might have
a second pilot jet fitted to it, to be worked by the cock and to be lighted or turned
off in exactly the same manner as described in reference to pilot gas jet 2.
When the lever L is further pulled over so that pilot jet 2 assumes the slanting
position shown in dot and pick lines in Figure 1, then gas will be shut off from all
the burners.
The precise position of the gas way G or pilot jet with regard to the cock C
and burners may be modified to suit the circumstances or conditions of the lamp to
which the pilot is to be fitted.
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. The improved pilot gas cock device consisting in the provision in combination
with the cock C and its ordinary through-way between for example the tube A and
the elbows E of the separate or independent gas-way or gas-ways G in connection
with a movable pilot jet or jets such as 2 adapted to move with the cock the parts
being arranged disposed and adapted for general use substantially as and for the
purposes herein set forth with reference to Figures 1 and 2 of the drawings.
2. The improved pilot gas cock device consisting in the provision in combination
with the cock C and its ordinary through-way between for example the tube A and
the elbows E of the separate or independent fixed pilot jet pipe device 2ª adapted

page_text: to receive gas or to have the gas stream cut off therefrom by the opening or closing
of a separate groove or grooves or gas-way or gas-ways cut in the cock the several
parts being arranged and adapted to work substantially as and for the purposes
herein set forth with reference to Figure 3 of the drawings.
3. The combination or general arrangement of parts constituting the improved
pilot gas cock device arranged disposed and adapted to operate or be operated
substantially as herein set forth.
Dated this 13th day of June 1894.
A. CRAWHALL CHAPMAN,
3, St. Nicholas' Buildings, Newcastle-on-Tyne, Patent Agent.