Improvements in Lanterns for Ships' Navigating Lights.
Year: 1899

page_text: Date of Application, 24th Apr., 1899
Complete Specification Lott 2nd lan 1000
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HEYDIONAL DITUIFICATION.
Improvements in Lanterns for Ships' Navigating Lights.
ALFRED FALCONER BALL, 14, Lansdowne Terrace, Gosforth, in the County of
Northumberland, Electrical Engineer, do hereby declare the nature of this inven-
tion to be as follows:-
It consists of improvements in lanterns for ships' navigating lights, whereby
the same can be made interchangeable with oil or electric lamps.
With this object, I make the ordinary ventilating chimney, fitted at the top of
the lantern for use with oil lamps, removeable. It is attached to a brass screw
which fits into a brass ring on the top of the lantern. When the lantern is
required for the electric light, the above mentioned copper chimney is unscrewed
and a brass cap is fitted into its place. This cap has a lampholder for an ordinary
incandescent lamp fitted on its under side, of suitable length, so that the film of
the lamp will correspond with the position of the oil lamp flame, when the cap
is screwed into its place.
At the top of the brass cap, there is a union for lead, india-rubber or copper
flexible tubing, whereby a watertight connection can be made between the lantern
and an adjoining junction box, or pipe, for the electric wires to pass through to
the lamp.
Dated this 2011
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1000
Improvements in Lanterns for Ships' Navigating Lights.
I, ALFRED FALCONER BALL, 14, Lansdowne Terrace, Gosforth, in the County of
Northumberland, Electrical Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:.
The principal object of my invention is to make the lanterns used for ships'
navigating lights adaptable for use with either oil or electric lamps, and to obviate
the necessity of introducing unprotected electric light wires and terminals inside
the lantern.
For this purpose, instead of attaching the ordinary oil lamp ventilator per-
manently to the top of the lantern by rivets or other methods, I fasten it to a
ring of brass, or other suitable metal, which fits, by means of a screw or bayonet
coupling, into another metal ring attached to the top of the lantern.
When it is required to adapt the lantern for use with the electric light, the
ventilator is removed and a metal cap, with a holder for an ordinary incandescent
Pi S31

page_text: electric lamp, is fitted into its place and retained there by another metal ring,
with a screw or bayonet coupling, interchangeable with that attached to the oil
lamp ventilator. For the protection of the electric wires, an india-rubber, lead or
preferably flexible copper tube is attached to the cap by means of a branch, or
any other convenient method, through which they are lead from a convenient
point of distribution to the lampholder in the lantern.
In order that my invention may be fully understood and readily carried into
effect. I will describe the accompanying sheet of drawings, reference being made
to the letters marked thereon. Similar letters refer to similar parts throughout
the several views.
Fig. 1, shews an ordinary type of ships' navigating lantern, of copper, brass
or other suitable metal, in which the ventilator (v) is attached to a screw (a) of
brass, or other suitable metal, which fits, by means of a screw, onto a metal
ring (b), rivetted to the top of the lantern. A bayonet coupling can be used for
this purpose if preferred.
The lantern as shewn in this figure is suitable for being lighted by means of
an ordinary oil lamp.
Fig. 2, shews the same lantern with the oil ventilator (v) removed and a metal
cap (d), to which is attached a lenghtening piece (e) and an electric incandescent
lampholder (f), fitted in its place. This cap (d) is retained in its position by a
metal ring (c), which is screwed and is interchangeable with the metal ring (a)
shewn in Fig. 1. If preferred this ring (c) can be fitted with a bayonet coupling.
To ensure the flat side of the electric lamp film always being in the proper
position, I fit a key (p) into the cap (d), which engages in a keyway (7) cut in
the inner periphery of the ring (b).
For the protection of the electric wires, an india-rubber, lead or preferably
flexible copper tube (m) is attached to the cap (d) by means of the branch (h),
through which they are lead from a convenient point of distribution to the incan-
descent lampholder (f) in the lantern.
Figs. 3 &
are enlarged size drawings of the ventilator (v) fitted with the metal
rings (a and b) and cap (d) for the electric lamp respectively.
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:-
-
1. The improved arrangement and construction of ships' navigating lanterns,
whereby the electric lampholders can be made interchangeable with the ventila-
tors for the oil lamps.
2. The combination of an electric lampholder with a metal ring and cap with
flexible tubing which can be removed from the lantern without disconnecting the
electric light wires.
3. The combination of a metal ventilator ring, cap and lampholder, with screw
or bayonet coupling, substantially as herein described with reference to Figs. 3
& 4.
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