IMPROVEMENTS IN ELECTRO-CONDUCTING AND ELECTRO- GENERATING APPARATUS OR APPLIANCES FOR MEDICO-ELECTRIC AND OTHER PURPOSES
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Isac Louis Pulvermacher at
the Office of the Commissioners of Patents, with his Petition, on
the 18th March 1872.
I, ISAC LOUIS PULVERMACHER, of 168, Regent Street, in the County
of Middlesex, Electrical Engineer, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN ELECTRO-CONDUCTING AND ELECTRO-
GENERATING APPARATUS OR APPLIANCES FOR MEDICO-ELECTRIC AND OTHER PURPOSES,"
to be as follows:-
:-
The first improvement relates to an electro-conducting and electro-
generating plaster rendered conductable by metallic surfaces grouped in
alternate order with the sticky substance which causes the plaster to
adhere to the body.
The metals may be perforated or openworked, through which per-
forations the sticky substance of the plaster remains uncovered to permit
of its adhering to the body when applied, notwithstanding the non-
adherence of the metallic surfaces.
The metals may be arranged in groups in a state of leaf, plates,
strips, or other pieces or sheets set in metallic conductable connection

page_text: amongst each other. They may be left naked or they may be covered
with a paper or tissue to be used in a damp state, so as to establish
wet conduction with the skin if needed in lieu of dry metallic
conduction.
The leaves, plates, strips, or other picces or sheets are held to the
backing by the adhesiveness of the cement, and are set in conductable
connection with a galvanic battery by means of other plates or pieces.
on or to which pins or cramps are arranged for passing through the first
metallic surface and the backing (plaster), and then being bent down to
hold themselves in position, and to be connected by a flexible conducting
wire and a pole of a battery.
To make this plaster electro-generating by itself one or more central
plates are used, made alternately of positive and negative metals per-
forated or openworked or not, and between which layers of fibrous
absorbing materials are placed. The plates are provided with pins or
cramps, which are passed through the backing and bent down. Thus a
galvanic battery is formed the moment the exciting liquid is imbibed
by the absorbent material.
The next improvement relates to electro-conducting respirators and
to electro-generating respirators. These are composed in the first case
of wires in conductable connection with each other set in contact by
means of flexible conducting cords with the poles of a battery carried
on the person or otherwise. In the other case the respirators are com-
posed of wires of alternate positive and negative metals combined as 'a
voltaic battery, in the hollows of which an absorbent material is placed,
serving to absorb the damp exhalation, and thus generating the elec-
tricity, this being analogous to the channelled voltaic bands shown in
Figures 16, 17, and 18 of the Drawings annexed to the Specification
filed by me on the 1st December 1871.
The last improvement relates to chain batteries, in which the metals
of the elements may be of flat, curved, or of cylindrical form, so that
the depolarizing chemical compound can be renewed at will, and if they
are of cylindrical or other hollow shape I propose to make the cores of
a solid or of a hollow character, so that they can be pushed in and
drawn out for others to be pushed in. If hollow cores are used they
may be of woven, plaited, twisted, or braided wire worked over a mandril
or not. By this means a very simple method of maintaining the in-

page_text: tensity of the current is established, and also of facilitating the cleansing
of the elements.
These cores may be made up of one metal enveloped in felt or other
porous material in which perforations or spaces have been made for
receiving the chemical compound, its direct contact with, say, the zinc
being prevented by a film of porous fibrous texture interposed between
them, whilst the chemical compound is permitted to come into contact
with the negative metals of the elements. The wires when twisted or
worked into shape may be dipped or otherwise covered by a paper pulp
or a moistened sheet, so that it can find a lodgement in the interstices
or openings of the wires. The paper covering, moulded with grooves,
channels, or spaces, serve for retaining the chemical compound employed
for depolarizing purposes.