IMPROVED MEANS OF AND APPARATUS FOR LIGHTING GAS LAMPS
Year: 1870

page_text: LETTERS PATENT to Edmund Chiverton, Orient Cottage, Middle
Street, Southsea, in the County of Hampshire, for the Invention
of "IMPROVED MEANS OF AND APPARATUS FOR LIGHTING GAS LAMPS."
Sealed the 27th January 1871, and dated the 29th August 1870..
PROVISIONAL SPECIFICATION left by the said Edmund Chiverton at
the Office of the Commissioners of Patents, with his Petition,. on
the 29th August 1870.
I, EDMUND CHIVERTON, Orient Cottage, Middle Street, Southsea, iir
the County of Hampshire, do hereby declare the nature of the said
Invention for "IMPROVED MEANS OF AND APPARATUS FOR LIGHTING GAS LAMPS,"
to be as follows:-
This Invention consists of an external vessel or chamber having three
tubes within it. The vessel can either be inside or outside of lamp
connected to street or other connections, which communicates to or
from the principal gas mains in the street, and from which it receives a
continuous supply, an inlet communication is formed from the main

page_text: supply to the first vessel or chamber, also an inlet is formed from the
first vessel or chamber to the first tube, also from the first to the second
tube, wherein I deposit a chemical, I propose glycerine, at the bottom
of tube, and a mixed liquid or water above, and in this tube the first
action takes place and as the pressure is increased at the gas works
gives pressure on the liquid causing the liquid to rise in the third tube,
which acts on a double floating valve, the valve being raised by the
pressure of the liquid allows the gas to emit itself from the valve box,
passing out at the burner, which is supplied from the inlet of the first
vessel, a gauge line is thereby formed by the liquid which acts as an
indicator for regulating or setting the apparatus for any fixed pressure
that may be required. By this method the first pressure-put-on-at-the-
works gives an instantaneous illumination to all lamps whereever the
apparatus is fixed. When the pressure is taken off at gas works back to
its daily pressure, it extinguishes the night illuminator by the valve
closing, bringing the apparatus back to its setting form, the valve closing
on one side opens a small passage to allow a very small light to be
burning during the day, which is also supplied from the first tube; this
light is not visible. There is never more than one light burning at a
time, consequently none of the illuminating power is destroyed as it
would be by having two lights situated close to each other.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edmund Chiverton in the Great Seal Patent Office
on the 17th February 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDMUND 2
CHIVERTON, Orient Cottage, Middle Street, Southsea, in the County of
Hampshire, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of August, in the
year of our Lord One thousand eight hundred and seventy, in the thirty- 3
fourth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Edmund Chiverton, Her special licence that
I, the said Edmund Chiverton, my executors, administrators, and assigns,
or such others as I, the said Edmund Chiverton, my executors, adminis-
trators, and assigns, should at any time agree with, and no others, from 3

page_text: time to time and at all times thereafter during the term therein expressed
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "AN IMPROVED MEANS OF AND APPA-
RATUS FOR LIGHTING GAS LAMPS," upon the condition (amongst others) that
I, the said Edmund Chiverton, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and
seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner tlie same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
KNOW NOW YE, that I, the said Edmund Chiverton, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the Drawings here-
unto annexed, and to the letters and figures marked thereon, that is
to say :-
This Invention consists of an external vessel or chamber having three
tubes or chambers within it, as shewn in the accompanying Drawings.
Fig. 1 is a full size elevation of the apparatus; Fig. 2 a sectional
elevation taken in the line 1, 2, Fig. 4; and Fig. 3 is also a sectional
clevation shewing its action.
Fig. 2 A is the inlet communication to be connected to the principal
main, which emits the gas into the first chamber, Fig. 3 B, and pass
through the tubes C, D, the tube C being the supply for depressing the
liquid in chamber E, and the tube D being the supply for consumption
communicating to a double valve F, G, which is attached to a float H
sustained by liquid, the level of which is shewn at I, and by turning on
the pressure from the main supply depresses the liquid and causes the
float II to drop, which opens the valve Ę and allows a passage of gas to
the burner J at the same time it closes the valve at G; by this action
of the valve the night light is produced, and the depressed liquid is
raised in chamber K, K, and when any pressure that may be on at the
time of fixing the apparatus the above result is produced; to set the
apparatus after this result more liquid is poured in at L, which counter-
balances the gas pressure, causing the float to rise which shuts the valve
at F and opens it at G, the gas will then ignite at M, Fig. 2, and burn

page_text: at a small jet during the day, protected by a guard shewn at N, Fig. 3;
it will thus be seen, that by putting on the first pressure at the gas
main, instantaneous illumination will be the action of the self-lighting.
apparatus.
Having now set forth the nature of my Invention, and in what
manner the same is to be performed, I wish it to be understood that
what I claim is, the double-acting valve attached to a float on the
hydraulic self-acting principle.
In witness whereof, I,, the said Edmund Chiverton, have hereunto
set my hand and seal, this Sixteenth day of February, in the
year of our Lord-One-thousand-cight.hundred and seventy-one.
EDMUND. CHIVERTON. (L.S.)