Improvements in Rendering Luminous Marine and other Compasses.
Year: 1885

page_text: Improvements in Rendering Luminous Marine and other
Compasses.
I WILLIAM CULLEN HORNE for the Pioneer Paint Coy Ld of 5a Alderman-
bury Postern in the City of London Merchant do hereby declare the nature of
my Invention for IMPROVEMENTS IN RENDERING LUMINOUS MARINE AND OTHER
COMPASSES to be as follows:-
In applying my Invention to a Compass, I with a luminous compound preferably
such as is known as Balmains luminous paint and obtainable at the Pioneer Paint
Coys offices 5a Aldermanbury Postern London or of their Agents, the lighting
ingredient of which is composed of a sulphide of calcium that consists of an
enduring character (of say throughout and over a night of 12 hours, I place by
three or more coats upon the inside of the bowls, and around the insides of such
compasses such luminous compound so that its luminosity is apparent through the
transparent card made of talc or a similar substance that is transparent and upon
which is painted the markings or points in black in any desirable form.
I claim this arrangement of painting the bowl and inside of compasses as being
an improvement upon the old method of painting the dial, as by means of the bowl
a greater thickness of the compound can be used and with such greater thickness
more luminosity results.
Secondly, the Dial or Compass card by being transparent & not loaded with the
luminous paint as hitherto adopted acts much more sensitively.

page_text: COMPLETE SPECIFICATION.
Improvements in Rendering Luminous Marine and other
Compasses.
I WILLIAM CULLEN HORNE for the Pioneer Paint Coy Ld of 5a Aldermanbury
Postern in the City of London Merchant do hereby declare the nature of my
Invention for IMPROVEMENTS IN RENDERING LUMINOUS MARINE & OTHER
COMPASSES and in what manuer the same is to be performed, to be particularly
described and ascertained in and by the following statement :—
In applying my Invention to a Compass I with a luminous compound preferably
such as is known as Balmains luminous paint and obtainable at the Pioneer Paint
Coys. Offices 5a Aldermanbury Postern London or of their Agents, the lighting
ingredient of which is composed of a Sulphide of Calcium that consists of an
enduring character of say throughout and over a night of 12 hours, I place by three
or more coats upon the inside of the bowls and around the insides of such
compasses such luminous compound so that its luminosity is apparent through the
transparent card made of talc or a similar substance that is transparent and upon
which is painted the markings or points in black in any desirable form.
I claim this arrangement of painting the bowl and inside of compasses as being
an improvement upon the old method of painting the dial, as by means of the
bowl a greater thickness of the compound can be used, and with such greater
thickness more luminosity results.
Secondly the Dial or Compass Card by being transparent and not loaded with
the luminous paint as hitherto adopted acts much more sensitively.
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
Firstly. The painting of the bowl and inside of Compass instead of the old
method of Painting the Dial, whereby a greater thickness of Luminous compound
can be used resulting in greater luminosity.
Secondly. The Compass Card or Dial being transparent & not loaded with the
paint acts much more sensitively.