AN IMPROVED SAFETY LAMP
Year: 1884

page_text: HARRY HEATH FORD 43 Park Green Macclesfield Gas Engineers Assistant do
hereby declare the nature of said invention for AN IMPROVED SAFETY LAMP to
be as follows:-
:-
I construct the body of my Lamp in part, of solid Brass, or any other approved
Metal, either cast or wrought, and partly of Glass, which Glass especially, is
carefully calculated to give the strongest possible form, & well annealed, to
enable it to resist the action of heat, and is in fact practically indestructable.
I so.
arrange the metal part of the said cylinder, that no heat from the lamp, contained
in the same can act upon or render such metal hot; and the Glass portion of the
cylinder, yields the greatest possible illumination as is obtainable froin an oil lamp.
For ventilation I provide a series of channels, proceeding from the bottom of the
said cylinder under, and around, the oil lamp, the openings to the channels being
covered by a perforated ring, so constructed that by a partial revolution, it cuts of
the air supply, thereby extinguishing the light. I also protect the inlet for air,
and outlet for products of combustion, with discs of woven brass, or other wire, of
such sizes as may be found convenient.
יד
בד

page_text: HARRY HEATH FORD, 43 Park Green, Macclesfield Gas Engineer, do hereby
declare the nature of my invention for THE SECURITY OF COAL MINERS AND
OTHERS EXPOSED TO EXPLOSIVE GASSES and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:- -
I construct the body of my lamp of two cylinders of Brass or other suitable
metal as shewn at b b b b fig 1 connected together bolts and nuts c 1. cl. I fill up
the space between the two with a cylinder of annealed flint glass c. c. or of tale or
mica as may be desired. To the lower cylinder I attach a perforated ring e. e. c. e.
which is secured thereto by a screw i. i. in the body of the lamp. This ring I cover
with a cap revolving on a set screw d in the cross bar ffff figs 1 and 2, and
fitted with air channels shewn by the dotted lines in fig 2 which cap having
corresponding holes to those in the ring e. e. e. e. by a slight movement closes the
perforations, cutting off the air supply and extinguishing the oil lamp h. By this
it will be seen the lamp is ventilated through the holes e. e. e. e. the air then
passing through the guaze a figs 1 and 2 and thence passing up the body of the
lamp, thereby keeping the cylinder cool, is discharged through the guaze a. a. near
the top of fig 1. which is again protected by a metal cap a 1. A handle may be
attached to this cap, but I prefer to fix it to the body of the lamp as shewn at g g.
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 arrangement and construction of my lamp in a solid form, namely with the
ventilation through bottom and top or vertically only, and not horizontally as
heretofore, in combination with the ring attachment for stopping the same, as
herein before described, and illustrated by the accompanying drawings.
Dated this third day of October 1984