A New Method of Producing Occulting Lights for Lighthouses, Beacons, Buoys, and other Lights.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
A New Method of Producing Occulting Lights for Lighthouses,
Beacons, Buoys, and other Lights.
I, JOHN RICHARDSON WIGHAM, of 35, Capel Street, Dublin, Lighthouse Engineer,
do hereby declare the nature of this invention to be as follows:-
My invention consists in a method by which occulting lights for lighthouses,
beacons, buoys and other lights may be produced by the operation of the pro-
ducts of combustion or heated air acting directly on the atmosphere.
A lamp either oil or gas, or other source of heat is placed in the centre of the
apparatus for the production of the necessary heat and may also be used as the
source of light in connection with screens or coloured glass or talc, blackened or
stained or other suitable material or lights in variously coloured shades may be
placed on the top of the rotating chamber so as to cause any variation or distinc-
tion in the characteristic appearance of the light that may be desired. The hot
air is ejected directly into the atmosphere of the lantern or other place in which
the apparatus is set up, by curved tubes arranged round the periphery of the
revolving chamber in such a manner as to cause the rotation of the chamber from
which the products of combustion or the hot air is ejected without the aid of any
fans or louvres.
Dated the 9th day of March 1898
A New Method of Producing Occulting Lights for Lighthouses,
Beacons, Buoys, and other Lights.
I, JOHN RICHARDSON WIGHAM, of 35, Capel Street, Dublin, Lighthouse Engineer,
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 fol-
lowing statement:―
My invention consists in a method by which occulting lights for lighthouses,
beacons, buoys and other lights may be produced by the operation of the pro-
ducts of combustion or heated air acting directly on the atmosphere.
A lamp, either oil or gas, or other source of heat is placed in the centre of the
apparatus for the production of the necessary heat and may also be used as the
source of light in connection with screens or coloured glass, or talc, blackened or
stained, or other suitable material, or lights in variously coloured shades may be
O

page_text: placed on the top of the rotating chamber so as to cause any variation or distinc-
tion in the characteristic appearance of the light that may be desired. The hot
air is ejected directly into the atmosphere of the lantern or other place in which
the apparatus is set up, by curved tubes arranged round the periphery or upper
surface of the revolving chamber in such a manner as to cause the rotation of the
chamber from which the products of combustion or the hot air is ejected without
the aid of any fans or louvres.
In the accompanying drawing Fig. 1 is a plan and Fig. 2 a sectional elevation.
A funnel Fis placed over the chimney of the lamp and its lower edge brought
sufficiently low to prevent the hot air escaping at the bottom. This funnel is
carried by the supports S which stand upon the ring R. This ring is made to fit
into the body of the lamp. An inverted cone C is placed inside the funnel F and
secured to it by the brackets B. This cone.carries a steel pin P upon which the
apparatus revolves.
The parts thus far described are fixed. The revolving portion consists of a
shallow cup K which carries the tubes T. These discharge the hot air horizontally.
The cap has an inverted cone Q attached to it, similar to cone C. From the
centre of this cone a tube Y rises and into the top of this an inverted cup I is
screwed, the cup carries a suitable bearing which revolves upon the steel pin P.
A wire frame work W, attached to the cap K, carries the screens N, parts of
which are shown in dotted lines.
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:
The method of producing.occulting or alternately coloured lights, substantially
as above described.