Year: 1887

page_text: I ALBERT FRIEDLAENDER, of No. 52, Fransösische Strasse, Berlin, Germany,
Electrician, lo 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:-
My invention relates to an improved electric portable lamp and consists chiefly of
an immersion battery which provides the current for an incandescent lamp, the
immersion device being so constructed that a minimum of space is required and the
battery can be put out of operation or the strength of the current regulated by varying
the depth of immersion by operating the worm spindle provided with suitable
thumbpiece or its equivalent exteriorally of the battery case.
The elements of the battery are at one side and above the electrolyte attached to a
suitable spindle or shaft provided with an appropriate worm wheel into which a worm
gears for operating the said worm wheel.
I am aware that immersion batteries as such are not novel as various immersion
batteries have been proposed in which the elements are attached to a framework
provided with a rack or screw so that the same can be raised out of or immersed in
the fluid by operating the pinion to the rack or the nut to the screw or the screw
itself but all of these batteries possessed the disadvantage that they require too much
space the battery receptacle must be of improportionate height in order to permit the
raising and lowering of the elements or if the heighth is decreased the other dimensions
must be proportionately increased.
Now in order to avoid all these disadvantages I have invented a compact readily
operated immersion battery which only requires to be made one half the heighth of

page_text: the batteries hitherto known. The strength of the current can be regulated with the
greatest possible accuracy by operating the spindle or shaft carrying the elements so
that the same are more or less immersed.
Figure 1 is a vertical section some of the parts being represented in side view,
Figure 2 is a vertical section some of the parts being shown in elevation.
Figure 3 is a top view with the cover removed.
The casing receptacle or vessel is composed preferably of four walls a, two of which
are stiffened or supported by a stay a connecting the said walls and is divided into
compartments so as to form a series of separate elements.
I prefer this arrangement as experience has proved that the requisite electric force
for feeding an incandescent lamp is increased, that is to say, that the power is greater
than when the partitions are omitted so that only one element is formed.
The lid or cover is attached to the casing or receptacle by means of screws b₁ or
in other suitable manner and carries a handle for the ready transport of the
apparatus.
c is an incandescent lamp which is placed with its reflector c¹ in an opening of
the lid b.
One pole of the filament or incandescent body d is in electric contact with the
metallic tubular part or sheath of the lamp c and reflector e¹ whilst the other pole
ends in a central wire d which is in contact with the spring e and the conductor e¹
leading to a contact attached to the lid b.
The sheath or tubular part d' of the lamp reflector is also in connection with the
contact on the lid b by means of the contact fand wire or conductor f¹.
A connection is formed between the elements of the battery and the incandescent
lamp by means of the contacts g g attached to the casing or receptacle a which are in
contact with the contacts e2f2 when the lid or cover is applied to the receptacle and
which are also in contact with the journals of the shaft h.
The zinc and carbon or other plates of the battery are rigidly attached to the
shaft in a series that is the zinc plate of the one compartment is connected to the
carbon plate of the next compartiment.
The shaft his turned by means of the knob or button worm and worm wheel on the
shaft or a crank attached to the said stop. If desired a ratchet and pawl can be
employed for retaining the elements at any desired depth of immersion.
I prefer however to employ the worm and the worm wheel on the shaft h. It
the work is rotated by means of the knob or button the elements will be immersed
to any desired degree or removed from the exciting fluid.
In Figures 1 and 3 the zinc and carbon plates are represented in raised position
whereas the same are represented in their lowest position in Figure 2. The threads
of the worin are preferably of low pitch so that the plates will remain in any position
An indicator m fixed to the journal of the shaft h follows the movement of the
plates and shows the depth of the immersion. When zinc and carbon plates i i
are employed the exciting fluid in the receptacle a is preferably composed of diluted
muriatic acid, chloride of zinc, and bichromate of potash with an addition of moderate
quantities of glycerine and Iodine although when a sufficiently large receptacle and
an increased number of compartments and elements are employed other known
elements or exciting fluids can be used.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed, I declare that what I claim is
C
1. An electric portable lamp consisting of an electric incandescent lamp wit
reflector c and an immersion battery with or without partitions in which a shaft hi
onesidedly arranged to turn above the electrolyte carries the elements and can b

page_text: turned by means of a worm k and worm wheel k¹ or other equivalents, substantially as
described in the foregoing specification and shown in the accompanying drawings.
2. In the immersion battery claimed in claim 1 the application of an indicator m
at the exterior of the receptacle a for indicating the position of the elements substan-
tially as described in the aforegoing specification and shown in the accompanying
drawings.
3. The completion of the circuit when the lid or cover bis applied to the receptacle a,
by means of the contact plates e² ƒ and g g the latter being in contact with the
journals of the shaft h, substantially as described in the foregoing specification and
shown in the accompanying drawings.
4. The application and employment of an electrolyte or exciting fluid composed of
a solution of chloride of zinc and bichromate of potash in diluted muriatic acid with
an addition of iodine and glycerine, substantially as described in the foregoing specifi-
cation and shown in the accompanying drawings.