Improvements in Portable Galvanic Batteries and in Glow Lamps connected therewith.
Year: 1890

page_text: Date of Application, 13th Feb., 1890-Accepted, 22nd Mar., 1890
COMPLETE SPECIFICATION.
Improvements in Portable Galvanic Batteries and in Glow Lamps
connected therewith.
I, ALBERT LEWIS DAVIS, of Ailsa Road, St. Margarets, Twickenham, in the County
of Middlesex, Electrician, do hereby declare the nature of my invention to be
particularly described and ascertained in and by the following statement :-
My invention relates to a portable galvanic battery applicable to the electric
lighting of a small incandescent lamp, suitable for use in a photographers dark
room when protected by a suitable shade, or for any other portable purpose, and is
particularly designed to be impervious to liquid and acid proof, and to be of such
external polygonal shape that it may be adjusted to stand on any desired face, to
cause various degrees of immersion of the pole plates in the acid to give a larger or
smaller quantity of current, to increase, or reduce the incandescent light as may be
desirable.
At the same time, the construction is of a cheap and simple character, adapted to
easily re-charge, and not likely to get out of order.
In order that my invention may be the better understood I now proceed to
describe the same in relation to the drawings hereunto annexed reference being had to
the letters and figures marked thereon.
Fig. 1. is an external elevation of the battery case and lamp when standing upon
one of its polygonal edges.
Fig. 2 is a vertical section through the battery case with the lamp thrown forward
to throw light into a bath or other similar purpose.
Fig. 3. is a sectional plan of the battery case with the lamp extended.
Fig. 4. is an elevation with the cover removed showing the pole plates in a position
of half immersion in the exciting fluid, and Fig. 5 is a detail view of the swivelling
lamp connections.
My battery consists of one or more galvanic cells, there being two only shown in
the drawings A A.
Within these cells (which may be conveniently single fluid cells) are arranged the
pole plates B and K of any desired materials which are semi-circular in shape as
shown in Fig. 4.
The exciting fluid in the said cells may be of any suitable known kind, and the
cells may be coupled "in series or "in parallel" as desired.
"
From the semi-circular form of the pole plates it is obvious that the degree of
immersion in the exciting fluid (which only partially fills the cell) will depend upon
the particular polygonal face on which the battery stands. As for instance in Fig. 4
when the top edge of the semicircular pole plates are vertical, and the fluid half fills
the compartment, the pole plates are half immersed. A greater or less degree of
immersion is effected by turning the case on to either of the adjoining polygonal
bases, so that the pole plates are turned towards the bottom of the case or towards the
upper part of the case.
For convenience the pair of cells as illustrated, are connected in series and the two
poles are carried to the special contacts for the filament of the incandescent lamp. In
order that the lamp should have full freedom of motion for throwing the light in any
desired direction, the bulb C and shade D. are mounted on two metal pivots E E, one
of which remains always in contact with the metallic ring F, to which one pole ƒ of
the battery is attached, the other pivot E is insulated from the ring F and makes
contact with the centre pin G. which is connected to the other pole g of the battery.
The circuit is thus completed through the filament of the incandescent lamp, whilst
the lamp and shade are capable of revolving about their pivotted hinges and also
about their common axis vertical to the side of the battery case, the aforesaid contacts
to either end of the filament being maintained during all the above movements.

page_text: Any form of galvanic battery may be used to form the current generator, but for
the sake of example I will describe the arrangement of battery as shown.
The battery is divided into two water-tight cells A by the centre diaphragm H of
vulcanite or other suitable material hermetically jointed in. place within the cylindrical
case, the two. ends of which are closed acid tight by two covers M M of vulcanite or
other suitable material and held by screws N. N.-B. B are a pair of similar poles
with the opposite pole K suspended between them, and the cells are charged partially
with a suitable exciting fluid L.
The cells are shown connected in series and their two extreme poles, connected
respectively to the centre pivot G of the lamp, and the other to a pin connected to
the ring F which makes contact respectively to each end of the filament.
The cells may be recharged through the plug holes O, an suitable vent holes P are
also provided to permit the easy discharge of the internal liquid when desired.
Having now described and ascertained the nature of my said invention and the
manner in which the same is to be performed, be it known that what I claim is :-
1st. A water tight and acid proof galvanic battery case containing one or more
galvanic cells with fixed pole plates occupying one part only of the cell; the
periphery of the case being made polygonal so that the case will stand on any
desired rectilinear face, with the pole plates vertical and more or less immersed in
the exciting fluid according to the special face on which the case is standing thus
giving a complete and easy control of the amount of current generated, substantially
as described.
2nd. The combination of such a galvanic battery case provided with internal cells,
with an incandescent lamp adjustable so as to pivot in any direction and at the same
time to maintain the necessary electric contacts.
3rd. The portable battery case cells and adjustable electric incandescent lamp, as
illustrated herewith and described in reference to the said figures.
L
1
1000
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.