IMPROVEMENTS IN THE CONSTRUCTION OF TAPS OR VALVES
Year: 1865

page_text: PROVISIONAL SPECIFICATION left by Edward Griffith Brewer at the
Office of the Commissioners of Patents, with his Petition, on the 20th
June 1865. A communication from abroad by Ernest Alexandre
Ribert, of Paris, France.
I, EDWARD GRIFFITH BREWER, of 89, Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF TAPS OR VALVES," (a communication to me
from abroad by Ernest Alexandre Ribert, of Paris, France, to be as follows:-
This Invention consists in the construction of taps or valves as hereafter
described, whereby the cleaning and lubrication of the parts may be carried
on without stopping the flow or passage of gas, and without any escape taking
place. Gas may at the same time be burnt while the cleaning is going on
whereby the liability of explosions taking place is prevented, and which
sometimes occur in taps or valves of the ordinary construction.
Taps or valves forming the subject of the present Invention have two plugs
placed one within the other, and are free to work in a vessel or case which
allows the inlet gas to pass through the tap and thence to the supply pipe.
The vessel or case containing the plugs is enlarged at both ends to receive
pipes to which the main and supply pipes are joined, and it is formed with,
say, four apertures, two of which serve alternately for the passage of gas. The
large plug has apertures corresponding in number with those in the case,
two of which are in the fore part, and two in that part containing the small
plug. When properly set for action the apertures in the front part of the

page_text: large plug correspond with those in
the small plug the supply is cut off.
of cast iron, the door of which is
to be introduced for opening and closing the inlet tap. The door of this case
When it is
is closed by a key to protect the gas company or other source.
required to clean the tap the door is opened, two screws holding a guard plate
áre removed and the plate raised, this exposes another screw, which is also
removed in order to turn the larger plug of the valve, which is placed in such
a position that the apertures of this plug allow the gas to pass into the pipe
supplying the burners without allowing it to pass into the inside or small
plug, and the large plug is fixed in this position by replacing the screw pre-
viously unscrewed. The openings in the large plug no longer communicate
with that in the vessel at the side of the small plug, the latter may then be
raised for cleaning and lubrication, as gas can no longer pass from the tap by
the internal plug. When the work is finished the smaller plug is replaced in
the centre of the larger, and the latter is put in its first position in such
manner that the apertures in the large plug no longer correspond with the
apertures in the case at the back part, but then the apertures of the small
central plug correspond to the two other apertures formed in the larger plug,
as well as in the valve, vessel, or case to establish or shut-off the ordinary
flow as desired. The large plug is hollow in front to receive the small, which
is concealed or surrounded with the ordinary gas, the large plug only acting
as a passage to the gas for a short space of time does not require cleaning,
it is sufficient to lubricate it by pouring oil in passages formed in the upper
part of the valve box or case.
the inlet and exit pipes, and by turning
The case or box is made, by preference,
made with an aperture for enabling a key