Improvements in connection with Ships' Side Lights.
Year: 1890

page_text: Date of Application, 3rd July, 1890
Complete Specification Left, 3rd Apr., 1891-Accepted, 13th June, 1891
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PROVISIONAL SPECIFICATION.
Improvements in connection with Ships' Side Lights.
THOMAS WILLIAM WATSON ARTHUR HENRY WATSON 4 Pall Mall London
Electrical Engineers do hereby declare the nature of this invention to be as
follows:-
The improvements are more particularly in connection with the application of
the electric light to the port & starboard lanterns or as they are commonly called
the side lights of ships and consists in surrounding or enveloping an ordinary
incandescent lamp with media of suitable colour in such manner that the rays of
light pass beyond the incandescent lamp as coloured instead of white rays from
whatever point they may be viewed when in use & thus illuminate the coloured
glass fronts of the lanterns with rays of the requisite colour and thereby intensify
the colour of the beam which they project & also to use in conjunction at the rear
of the incandescent lamp a multiple faced mirror or series of mirrors so constructed
as to collect the coloured rays emerging from the back of the incandescent lamp &
throw them forward again as separate beams of coloured light spread over the
surface of the glass fronts of the lanterns thereby multiplying & spreading the
ultimate beam projected.
It is also proposed for the same purpose when desirable to colour the glass itself
of (or make of coloured glass) the incandescent lamps.
Dated this 2nd day of July 1890.
THOS. W. WATSON.
ARTHUR H. WATSON.
COMPLETE SPECIFICATION.
Improvements in connection with Ships' Side Lights.
THOS. WILLIAM WATSON ARTHUR HENRY WATSON 4 Pall Mall London
Electrical Engineers 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 :-
This invention has for its object improvements in connection with the application
of electric light to the lights or lanterns used in navigation more particularly to
the red & green lanterns carried by vessels & commonly called side lights but is
also applicable to the white & coloured lanterns used as signals on board ship &
other places for the purposes of navigation the invention consists substantially in
enveloping or surrounding the electric light wether of the arc or incandescent kind
by a transparent medium so coloured as to develop or intensify the colour of the
lantern employed. For this transparent medium we propose to use a globe or
cylinder of glass of the requisite colour & of such dimensions & placed in such
position as will surround the arc light or incandescent lamp in use. In the case
of incandescent lamps when so desired we propose to colour or stain the glass of
which these lamps are made. The effect of this coloured medium being to throw rays
of suitably coloured light on to the coloured glass front of lantern & thus increase
them whereas white rays dilute them. In conjunction with the foregoing we use
behind the electric light a reflector having many surfaces, this reflector may be of
glass metal or other material as found desirable & have the many reflecting
surfaces stamped or cast upon it or may be built up of a number of pieces
suitably placed together. The effect of this combination of many faced reflector
& coloured surrounding medium is that the rays pass from the electric light in all
Γυμός 1.1 1

page_text: directions as coloured rays & are reflected by each surface of the mirror as
coloured rays & each surface of the mirror sends its own reflected coloured ray in
a definite direction. This sending of the rays of the requisite colour in a multitude
of directions instead of one only (or a focus) as in the case of an ordinary reflector
has the effect of opening out the beam of coloured light instead of concentrating
it & makes it brightly visible from many points of view.
Having now particularly described & ascertained the nature of our said inven-
tion & in what manner the same is to be performed I declare that what I
claim is
CLAIMS.
1. The use in ships side & other lights of a many surfaced reflector in conjunction
with the electric light substantially as described. .
2. In ships side & other lights the surrounding of the electric light by a
coloured medium so as to throw a coloured light onto the reflector used as well as
intensify the colour of the direct light substantially as described.
3. The use in ships side & other lights of a many surfaced reflector in
combination with an electric light surrounded by a coloured medium so as to
illuminate the reflector & the front glass with light of requisite colour substantially
as described.
Dated this 3rd day of April 1891.
THOS. WILLIAM WATSON.
ARTHUR HENRY WATSON.