IMPROVEMENTS IN MODERATOR LAMPS
Year: 1857

page_text: application for Letters Patent was not given within the time prescribed:
by the Act.)
PROVISIONAL SPECIFICATION left by Charles Emile Giajola at the Office
of the Commissioners of Patents, with his Petition, on the 11th March
1857.
I, CHARLES EMILE GIAJOLA, of Birmingham, in the County. of Warwick,
(Boyce's Cottage, No. 2, Sheep Cott Lane,) do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN MODERATOR LAMPS," to be as follows;
and consists partly in the application of the moderator system of lamps to
candleabra lustres, chandeliers, and the like articles, where a number of lights
may be fed by oil or other illuminating substance from one reservoir, operated
upon by one spring and one piston, with the requisite appendages of the
moderator lamp.
In the construction of lustres on this system, in addition to the usual
oil reservoir or cylinder I arrange a receiver, into which the surplus oil from
the burners flows, and from which a lower row or set of lights may be fed,
the upper lights being fed from the reservoir by the piston in the ordinary
The receiver should contain about two-thirds as much oil as is
contained in the cylinder, so that when the piston has descended two-thirds of
its course the oil shall pass into the cylinder through a slit provided for that
purpose, and which is closed during the descent of the piston to that point.
The piston is provided with a valve for the easy passage of the oil from one
side to the other.

page_text: The cylinder is double-bottomed, the lower one being conical, with a screw
to receive the moderator, which regulates the burners. Between the bottom
is a supply tube, from which the oil passes by'smaller tubes to the burners.
The level and flow of the oil is regulated by air tubes in connexion with
the burners.
In candleabra with a number of burners (four for example) a similar
system is followed as for lustres. The central burner is higher than those
surrounding it, and receives all the oil which feeds the four burners; the oil
as it overflows the central burner passes in rotation to each of the others.
One moderator answers for all the burners, & the rack may be either fixed
or moveable.
I also construct a moderator lamp in which a flat wick may be used instead
of a round one.
Other portions of this Invention relate to improvements made on my
Patent No. 109, Jan 16th, 1855, and which consists in having only one hole
in the piston leather instead of two, as therein described, for the passage of
the rack and feed tube, the feed tube being attached to the piston as in the
ordinary lamp, but made longer. The fixed feed tube reaches as high as the
air current to the burner, and has a clack box at its upper end to hold the
moderator and allow the latter a freedom of action. The moderator is made
conical to regulate the operations of the lamp.
In my dial lamp in my former Patent I describe the use of two racks, one
by which the piston is raised and the other attached to the piston. I now
dispense with the former and make the latter answer the purposes of both.
The dial is worked by a pinion in communication with the axis by which the
lamp is wound up.