Improvements in Gas Fittings for Street Lamps.
Year: 1896

page_text: Date of Apolication, 11th Jan., 1896
Complete Specification Left, 12th Oct., 1896-Accepted, 9th Jan., 1897
PROVISIONAL SPECIFICATION.
Improvements in Gas Fittings for Street Lamps.
I, CHARLES REVILL BELLAMY, of the Corporation Gas Department, Hood
Street, Liverpool in the County of Lancaster, Gas Engineer, do hereby declare
the nature of this invention to be as follows:-
This invention relates to the gas fittings of street lamps and has for its object
the provision of simple and cheap means whereby at a certain hour, say midnight,
the gas consumption in the lamp may be reduced to any required extent.
According to my invention I provide the lamp with a cock having one lower
and two upper branches, all the branches being parallel and vertical; the two
upper branches are connected to ports in the seating of the cock which are
diametrically opposite each other and at right angles to the port connected to the
lower branch. The cock plug has one through diametral passage and one radial
passage at right angles to the diametral passage, the two passages forming a
T passage; a groove is formed round the plug which connects the radial passage
to the opposite ends of the diametral passage.
The plug of the cock is adapted to make three quarters of a revolution between
its limiting positions, and it is provided with four arms adapted to be operated by
the torch which lamp-lighters are usually provided with.
The supply is led to the lower branch, and the upper branches lead respectively
to a high candle power light and a low candle power light; the former may consist
of a number of burners arranged on a circular connection supported symmetrically
by both branch pieces, but only communicating with one of them; the dummy
branch piece has a lateral connection to, say, a single central burner; in the case
of a small lamp the branches may each be connected to a single burner, the burners
having different consumptions and in each case each branch is controlled by &
suitable governor and the burners of the respective branches are so placed that the
one may be lighted from the other.
When the cock is in one extreme position, both branches are cut off from the
supply on giving the cock a quarter of a turn the supply communicates with, say,
the branch for the high rate of consumption; on moving the cock another quarter
of a turn, both branches communicate with the supply and the burners on the one
branch are lighted by those on the other branch; and finally, when the cock is
moved, through another quarter turn, to the other extreme position, the supply
communicates only with the branch for the low rate of consumption.
The groove on the plug is to ensure that, when the supply is turned from a
branch which is lighted to one which is not, the latter may be lighted before the
former is extinguished.
I find, by arranging the two branches for the lights as described relatively to
the supply branch, and by giving the plug a travel of three quarters of a revolution,
that there is ample cover for the ports, and that the leakage of gas so common
with this form of cock is thus prevented.
The parallel arrangement of the brauches also facilitates the construction inas-
much as no elbows are required to make the vertical connections, and the two
branch ports in the seating or shell can be drilled at the one operation.
Dated this 10th day of January 1896.
SLOAN & LLOYD BARNES,
Castle Chambers, 26 Castle Street, Liverpool,
Agents for the Applicant.

page_text: Improvements in Gas Fittings for Street Lamps.
I, CHARLES REVILL BELLAMY, of the Corporation Gas Department, Hood'
Street, Liverpool in the County of Lancaster, 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:-
This invention relates to the gas fittings for street lamps, and has for its object
the provision of simple and cheap means whereby at a certain hour, say midnight,
the gas consumption in the lamp may be reduced to any required extent.
I have illustrated my invention in the accompanying drawings, in which
Fig. I is an end elevation, Fig. 11 a side elevation, Fig. III a sectional elevation
the plug being omitted,
Fig. IV detail views of the plug, and
Figs. V, VI, VII, and VIII sectional elevations to illustrate the mode of
action.
Throughout the drawings the same parts are indicated by the same reference
figures.
According to my invention I provide the lamp with a cock 1 having a lower
branch, 2, and two upper branches 3 and 4, all the branches being parallel and
vertical; the two upper branches 3 and 4 are connected respectively to ports 5
and 6 in the shell of the cock which are diametrically opposite each other and at
right angles to the port 7 connected to the lower branch 2. The plug 8 has one
through diametral passage 9 and a radial passage 10 at right angles to the diametral
passage, the two passages forming a T passage; a groove 11 is formed round
the plug which connects the radial passage 10 to the opposite ends of the diametral
passage 9.
The plug of the cock is provided with a four armed lever 12 adapted to be
operated by the torch which lamplighters are usually provided with.
The supply is led to the lower branch 2, and the upper branches 3 and 4 lead
respectively to a high candle power light and a low candle power light; the former
may consist of a number of burners arranged on a circular connection supported
symmetrically by both branch pieces, but only communicating with one of them;
the dummy branch piece has a lateral connection to, say, a single central burner;
in the case of a small lamp each of the branches 3 and 4 may be connected to a
single burner, the burners having different cousumptions, and in each case each
branch is controlled by a suitable governor and the burners of the respective
branches are so placed that the one may be lighted from the other.
The lever 12 has a projecting piece, 13 which abuts, in its limiting positions,
against the opposite ends of the stop 14 cast on the cock shell; the stop piece 14
is of such a length as to permit the cock plug to make three-quarters of a revolution
between its limiting positions.
When the plug is in one extreme position as shown in Fig. V, both branches are
cut off from the supply; on giving the plug a quarter of a turn the supply com-
municates with the branch 3 for the high rate of consumption as shown in Fig. VI;
on moving the plug another quarter of a turn to the position shown in Fig. VII,
both branches communicate with the supply and the burners on the one branch are
lighted by those on the other branch; and finally, when the cock is moved, through
another quarter turn, to the other extreme position shown in Fig. VIII, the supply
communicates only with the branch 4 for the low rate of consumption.
The groove 11 on the plug shown clearly in Fig. IV is to ensure that, when the
supply is turned from a brauch which is lighted to one which is not, the latter may
be lighted before the former is extinguished.

page_text: I find, by arranging the two branches for the lights as described relatively to
the supply branch, and by giving the plug a travel of three-quarters of a revo-
lution, that there is ample cover for the ports, and that the leakage of gas 80
common with this form of cock is thus prevented.
The parallel arrangement of the branches also facilitates the construction inas-
much as no elbows are required to make the vertical connections, and the branch
ports in the seating or shell can be drilled at the one operation; the hole in the
outer shell made when the two ports 5 and 6 are drilled at the one operation, is, of
course, plugged up again.
I have not shown the fittings for the burners as these can be readily constructed,
from the description given, by any one familiar with that class of work.
The vertical branches 3 and 4 may be so arranged that the passages in them,
instead of being cored, as shown, may be drilled through to meet the lateral ports 5.
and 6, which mode of construction cheapens the manufacture.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is;-
1. The improved gas fitting for street lamps which consists of a cock having an
inlet and two outlet branches; a high candle power fitting connected to one of the
latter branches, and a low candle power fitting connected to the other; & plug
having a diametral and a radial passage connected by a groove; and the means for
operating the cock, substantially as described and illustrated.
2. The improved cock for street gas lamps, substantially as described and
illustrated.
Dated this 10th day of October 1896.
SLOAN & LLOYD BARNES,
Castle Chambers, 26 Castle Street, Liverpool,
Agents for the Applicant.