Improvements in Ships' Lanterns.
Year: 1890

page_text: Date of Application, 14th Mar., 1890-Accepted, 19th Apr., 1890
CODE BOLD DIPTIVATION
Improvements in Ships' Lanterns.
I, CHRISTIAN PETER GADEWOLTZ, of No. 15 Donnerstrasse, Ottensen, in the
Kingdom of Prussia, Empire of Germany, Manufacturer of metal goods, 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 :-
The object of this invention is to make ships' lanterns perfectly storm-proof. Gusts
of wind, which under certain circumstances would cause the extinguishing of the
lantern in present use, are rendered harmless by this invention. The object of the
improvements for rendering the lamp storm-proof is to protect the space between
the glass and the back reflector against the entry of cold air and also to prevent any
strong pressure of air taking place suddenly within the lamp.
A further object is to prevent gusts of wind from entering the chimney from
above, which is possible with the present lamps, since air can be thrown through
the outer cap during squalls or storins against the inner surface of the cover and is
then carried into the chimney. When such pressure is sufficiently strong, the lamp
is extinguished.
The improvements are represented in the accompanying drawing in which Fig. 1
is a side elevation of the lantern with open door t the lamp being removed.
Fig. 2 is a vertical section through the whole lantern with lamp.
Fig. 3 is a back view of the lamp with lantern in section.
Fig. 4 is a plan of fig. 1 in section on line w w.
Fig. 5 is a plan of fig. 2 in section on line xx.
Fig. 6 is a plan of fig. 2 in section on line y y.
Fig. 7 is a plan of fig. 2 in section on line z z.
Figs. 8 and 9 are side and front elevations respectively of the lamp proper.
In order to prevent cold air and gusts of wind from reaching the flame from
below, the burning space A is separated from the inner space R of the lantern G by
the lamp, which, while it is placed within the lantern as heretofore, is made with a
shield to fit within the upper and lower rebates e and e² and in the side rebate e³ and
is itself provided with a further fourth rebate e (see Figs. 5 and 9) which covers the
fourth surface. The feed air, which enters below at (Fig. 3) rises in the corner
flue m and arrives in the inner space R of the frame, where it becomes partially
heated and whence it reaches the burner of the lamp below at o after having passed
the tube c¹ (Figs. 2, 3 and 5).
The escaping gases rise through the chimney T into the cap, which is closed above
by lid D. Heretofore the gases escaped from this cap through the side p, which is
provided with perforations i and an encasing tube k.
It has happened during storms, that the outer air entering at o or o' was thrown
through the holes i against the lid D and rebounding therefrom entered the chimney.
In order to avoid this inconvenience, I have arranged a third air-conducting-tube v
within the cap-walls p, said tube being connected with the cap by the upper flange n
above the openings i. This flange n and tube prevents the air from being thrown
from without against the lid. The flange n stops every entering air current and
causes the same to travel downwards only after such air currents have passed below
the lower end of the tube v, can they reach the lid D and the chimney opening. On
this long course the force of pressure of such currents is sufficiently broken so that
the lamp will not be extinguished by them.

page_text: Having now partieularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
In Ships' Lanterns
1. The construction of the lantern with rebates eel and e³ and the lamp L with a
shield adapted to slide within said rebates and having a rebate & thereon whereby the
space A in which the lamp is situated is separated from the space R in the lantern
and the air can only pass from the latter to the former by or through a passage or
passages properly arranged for the purpose set forth.
2. The construction of the chimney with an inner tube with flange or
equivalent n in combination with the perforated wall p and tube kas and for the
purpose set forth.
Dated this 14th day of March 1890.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C., Agents to Applicant.