An Improved Pressure-regulator for Lamps and the like.
Year: 1898

page_text: Date of Application, 21st Dec., 1893-Accepted, 4th Mar., 1899
[Communicated from abroad by LA COMPAGNIE CONTINENTALE D'INCANDESCENCE
ET DE CHAUFFAGE, (Système Franck and Poitrimol) SOCIÉTÉ ANONYME, of
Brussels, in the Kingdom of Belgium.]
An Improved Pressure-regulator for Lamps and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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:-
In the Specification of prior Patent No. 5489 of March 5, 1898 is described and
illustrated a lyre-shaped type of apparatus wherein the weight of the apparatus
itself serves to keep the liquid at a constant pressure within the reservoir. This
principle of turning to account the weight of the apparatus in producing pressure
is also applicable to portable lamps and, more particularly and with a still greater
measure of success, to household lamps, candelabra and the like.
In the accompanying drawing are shewn two forms of lamps constructed in
accordance with this invention.
In Figure 1 the foot (stand or base) A of the lamp is shown to be hollow, and
it corresponds to the body or barrel of the "
pump" of our original type of lamp.
The reservoir B of the lamp terminates at its lower part in a tubular piece C of
metal or any other suitable material, provided at its base, at D, with a cup of
leather or any other supple or soft material, and forming the piston. E is the
plunger-tube which causes the liquid to rise to the gasifying burner K. F is
the connecting tube through which the lower part of the pump body" con-
municates with the airchamber above the liquid in the reservoir B. This tube F,
which passes through the bottom of the reservoir to which it is fastened, and the
flexible washer or lining D, terminates at the top, within the air chamber, in a
species of ball-valve G identical with that existing in our portable lamps pre-
viously described.
It will readily be seen that in this arrangement it is the weight of the lamp
itself and of the liquid fuel it contains that produces the pressure necessary for
feeding the burner. To this end, when the reservoir B is raised, the air is
admitted into the pump cylinder in the direction indicated by the arrows in the
drawings; enters between the wall of the pump body or lampstand and the
tubular extension C of the reservoir and then the space below the piston; infil-
trates between the leather-lining D and the walls of the pump-body; collects
in the lower part of such pump-body or lamp-stand; and thence through the
pipe F. enters the air-chamber of the reservoir B and operates upon the liquid
fuel. When the lamp has been alight for a number of hours, and upon the
piston reaching the lower end of its stroke, it is moved back to its raised position
without causing an extension of the lamp, owing to the provision of the small
air-check valve G at the top of the tube.
It may further be stated that the pressure may be enhanced by increasing the

page_text: weight of the lamp, say by the interposition between the lower part of the elon-
gated part C of the reservoir and the leather lining D, of a lead washer. The piston
may be independent of the reservoir, if desired, and constitute a support for such
reservoir. This seems, in fact, to be the form in which the invention would best
apply to drawing room candelabra. Figure 2 of the drawings is a diagram of
such an application drawn on a reduced scale. In this arrangement the follow-
ing parts corresponding to those of the portable lamp described above; a, the
foot, stand or base of the lamp forming a "pump-body"; b, the reservoir of the
lamp; c, the tubular body serving to support the lamp and forming the piston
at the same time, being, to this end, provided with a supple lining d at its base:
e, the plunger tube; f, a narrow tube forming an extension of the supporting
tube c; the two tubes serving jointly to place the lower part of the pump body
in communication with the air chamber of the feeding reservoir; and
ball-valve terminating the tube f. It is hardly necessary to add that the narrow
tube f might also extend into the interior of the supporting tube c, as shown in
dotted lines, that is to say retain the same diameter throughout, and be indepen-
dent of c.
the
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, as communicated to me by my
foreign correspondents, I declare that what I claim is:-
:-
In portable lamps, with a view to utilizing the weight of the lamp itself-
supplemented, if necessary, by a suitable load,-in order to subject the liquid
fuel in the reservoir to pressure, the arrangement hereinabove described, wherein
the base or stand A, or a, of the lamp constitutes the body of a pump, while the
feeding reservoir, of any convenient shape, fitted with a supple lining, D, or d,
forms the piston or serves to charge or load such piston; the air-chamber of the
reservoir and the lower part of the pump body communicating with each other
through a tube, F or f, terminating in a check-valve, G or g, and the liquid fuel
being supplied to the burners through a plunger-tube, E, or e, substantially
as described above and illustrated in the accompanying drawing.
Dated this 21st day of December 1898
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant