Improvements in Sign Boards.
Year: 1890

page_text: Date of Application, 19th Aug., 1890
Complete Specification Left, 16th May, 1891-Accepted, 19th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Sign Boards.
I, FRIEDRICH FICHTELBERGER, of Schellingstrasse No. 55, Munich, in the
Kingdom of Bavaria, Empire of Germany, Merchant, do hereby declare the nature
of this invention to be as follows:-
The object of this invention is to prepare tradesmen's signs with permanent
luminous power by enclosing a very pure and unalloyed phosphorescent substance
hermetically between two glass plates. The name or firm is painted on the back
of one of the plates in order to preserve the paint from atmospheric influences,
while on the other plate, after coating the same with dilute Japan lac, the phos-
phorescent substance is spread within a cardboard frame which serves as a firm
support for a third plate hereafter referred to, said lac causing the meal-like
substance to cohere. The phosphorescent substance is then covered by another
plate mentioned above, which has likewise previously received a coat of dilute
Japan lac. All three plates are closely fastened together with cement prepared
from litharge and glycerine and are hermetically sealed, the paint and the
phosphorescent substance being thus isolated relatively to each other. The signs,
when so far finished, are put into a frame of wood, metal or other suitable
material.
Dated this 10th dor of Act 1800
HUELSER & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Sign Boards.
FRIEDRICH FICHTELBERGER Merchant, of 55 Bayer Strasse Munich Bavaria,
Germany, 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 :-
Be it known that I Friedrich Fichtelberger, a citizen of the State of Bavaria
(Germany) residing at München in the State of Bavaria, have invented certain
new, original and useful improvement in luminous tradesmen's signs and similar
objects for advertisement purposes (for which I have obtained a Provisional Patent
in Great Britain No. 13031 dated, Aug. 19, 1890) with a permanent luminous
power, and that, on the one hand by the use of a pure phosphorescent substance
which is diluted with gum-damar or other suitable ingredient, and on the other
hand by the use of electrical light. And I do hereby declare that the following is
a full, clear and exact description of the invention, reference being had to the
accompanying drawings, forming part thereof.
Figure 1 is a view of a tradesman's sign without a frame,
Fig. 2 a sectional view showing the point of my invention, and
Fig. 3 a detailed view of the back partition of same;
These three views being deemed necessary to fully illustrate my improvement.
Plate (a) is of glass or of other suitable transparent or semi-transparent material
for the name of the firm or any other advertisement matter, which is painted on the
back of it (b) with paint of phosphorescent substance or otherwise in order to
preserve the paint from atmospheric influences. The sign or tablet, so far finished,
is put into a frame of metal or wood or other substance (c) which has a back-
partition (d) on which I put one or several incandescent or other lights (electric)
J

page_text: accordingly as a small or large surface is to be illuminated (e). Under the lights
are placed reflectors (f) which are fastened on staves (g).
Phosphorescence being especially produced by previous absorption of sunlight in
the day-time and of electric light by night. The sign or similar tablet. remains
luminous, though the electric light may be extinguished.
What I do claim as my invention, and desire to secure by Letters Patent, is
1° The herein described combination in a luminous sign or tablet for advertising
and other purposes in which the luminous power is produced by a phosphorescent
substance and electrical light.
2° The combination in a luminous sign or tablet in which the luminous power is
produced by sole use of electrical light."
Dated this Twelfth June 1891
FRIEDR. FICHTELBERGER,
Inventor.