IMPROVEMENTS IN THE CONSTRUCTION OF LANTHORNS FOR SHIPS' ANCHOR OR RIDING LIGHTS, THE SAME BEING APPLICABLE FOR LANTHORNS OF OTHER MARINE LIGHTS,
Year: 1885

page_text: I, WILLIAM HARVIE, of N° 222, Broomielaw, Glasgow, in the County of
Lanark, North Britain, Lamp Manufacturer, do hereby declare the nature of my
said invention for IMPROVEMENTS IN THE CONSTRUCTION OF LANTHORNS FOR
SHIPS' ANCHOR OR RIDING LIGHTS, THE SAME BEING APPLICABLE FOR LANTHORNS
OF OTHER MARINE LIGHTS, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My Invention, which relates to improvements in the construction of Lanthorns
for ships' anchor or riding lights, the same being applicable for Lanthorns of other
marine lights, is a development of the Invention described in my Complete
Specification No 343285 and illustrated upon the drawings annexed thereto, and
consists in the arrangement of the inclined or helical tubes therein described, in
such manner that the lens, in place of being formed of two, three or more parts, is
in one part only.
In order that my said Invention may be properly understood and readily carried
into effect, I will now proceed to describe the drawings hereunto annexed.
Figure 1, is an elevation of a Lanthorn constructed according to and constituting
my present Invention.
Figure 2, is a horizontal section of the same taken on the line A. B. Figure 1.
The upper chamber a, of the Lanthorn is constructed substantially as that
described in the aforementioned Specification and the inclined or helical tubes b,
are connected to the said chamber a, in a manner also similar thereto. The lower
extremity of each of the tubes b, is secured in a socket d, which is formed with the
clamp or joint pieces which are provided with holes for the passage therethrough
of the screws f, and g. By the screws f, the sockets d, are drawn tightly down
upon, and around the edges of the air inlets to the lower chamber h, and suitable
red-lead or equivalent joints are made between the adjacent surfaces of the said
sockets d, and chamber h. When so drawn down the screws g, are tightened and
secure the whole firmly together. By virtue of this arrangement, the lens c, is
capable of being made in one continuous annulus, and as such, it is held in the
Lanthorn of which it forms part, between the upper and lower chambers a, and h,
endwise, and circumferentially within, but not in contact with, the helical tubes b..
[Price 1

page_text: It is to be understood that in lieu of placing the annular lens circumferentially.
within the inner edges of the helical air supply tubes b, that such lens may be
made sufficiently large to be placed in the Lanthorn so as to enclose or contain
the said helical air tubes, the upper and lower chambers of the lamp being formed
with flanges or their equivalents for the purpose of holding the said lens endwise.
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
First. Constructing the Lanthorns of Ships' Riding or Anchor lights so that a
continuous annular lens can be used therein, that is to say, a lens which is
circumferentially within, but not in contact with, the helical tubes b, or circum-
ferentially exterior to and enclosing or containing the said tubes b, but not in
contact therewith, and held endwise between the upper and lower chambers a,
and h, the same being applicable to other marine lights substantially as herein before
'described and shown upon the annexed sheet of drawings.
Second. The socket pieces d, attached to the lower ends of the helical tubes b,
by which the upper and lower air chambers a, and h, are capable of being connected
or disconnected as required, by the insertion of or withdrawal of the screws f,
and g, as herein before described.
Dated this third day of July 1885.
J. H. JOHNSON, DAY & JOHNSON,
Applicant's Agents,
115, St. Vincent Street, Glasgow.