Year: 1889

page_text: Date of Application, 7th Jan., 1889
Specification Accepted, 16th Feb., 1889
I, GEORG WEHR, of 35 Alte Jacobstrasse, Berlin, Germany, Manufacturer, do
hereby declare the nature of this invention and what manner the same is to b
performed to be particularly described and ascertained in and by the following
statement:
This invention relates to a lightning arrester or conductor to be employed in
subterranean passages, or in places of overhead circuits, outside stations, and upon
telegraph poles for protecting the circuit and the apparatus from the action of powerful
atmospherical electric currents, or lightning strokes.
The lightning conductor, or arrester of which two modifled forms are shown in
vertical section in the accompanying drawings, consists, as illustrated in Figure 1, in
the arrangement of two chief parts, the outer enveloping casing g and the inner
cylinder a. The outer casing is provided interiorly with vertical ribs and is connected
by means of the binding screw J with the circuit L, which has to be protected from
lightning. The inner cylinder, which is firmly screwed upon the iron support S, is
provided interiorly with horizontal ribs and is connected to the earth circuit by means
of a binding screw E. The two cylinders are insulated at the top, by the projecting
edges of the ebonite piece band below, through the piece of ebonite c, the latter is
screwed upon the lower edge of the inner cylinder a. Upon the projecting flange of
the ebonite piece c is placed an elastic ring f of india rubber which is pressed against
the outer cylinder g and fully protects the inner part of the lightning arrester or
conductor from outward influences..
g
The construction shown in Figure 2 only differs from that of Figure 1, in so far
as the outer casing 9 is connected in this case with the support S, while the inner
cylinder is connected with the circuit requiring to be protected. There are however
two different circuits L' and L² which are connected with the inner cylinder through
the binding screws J₁, J, and bolts R³, R', the inner cylinder is composed, in this
case, of two semi-cylindrical parts a' and a² which are held insulated from one another
by the ebonite pieces b and c and one of which, the part a¹, is connected with the
circuit L, while the part a' is connected with the circuit L'.

page_text: Three, four, or more circuits L may likewise be connected with the inner cylinder
which must accordingly be divided into a corresponding number of parts.
It may be remarked, that the outer cylinder, or casing g may be provided with
horizontal ribs and the inner cylinder a with perpendicular ribs. The outer cylinder
may be made of cast iron coated with zinc, while the inner cylinder could be made
of brass, but the whole lightning conductor or arrester however, may also be made
of brass.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. lightning conductor or arrester consisting of a metallic cylinder a provided
with horizontal or vertical ribs, or furrows, and of another hollow cylinder, which is
provided on its inner sides with ribs, or furrows, in such a manner that the ribs of the
two cylinders g may cross one another and hence present a great number of passages
to the atmospheric electricity, as described, the construction being substantially as
shown by the annexed drawings.
2. In the construction of a lightning conductor or arrester an inner cylinder a in
two or more parts, insulated from one another for the purpose of connecting two or
more circuits to the same appliance, as described.
3. The insulation and the hermetic closure of the two cylinders à and g by means
of the two pieces of ebonite band cand of the india rubber ring f, as and for the.
purposes set forth.
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