IMPROVEMENTS IN LAMPS OR APPARATUS FOR LIGHTING RAILWAY CARRIAGES AND FOR OTHER PURPOSES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We, JOHN FULLER SHALLIS, of the Minories in the City of London, Engineer,
and THOMAS COOPER JOHN THOMAS of the same place, Engineer, do hereby
declare the nature of said invention for "IMPROVEMENTS IN LAMPS OR APPARATUS
FOR LIGHTING RAILWAY CARRIAGES AND FOR OTHER PURPOSES to be as follows:-
In the Specification of former Letters Patcut granted to us the 16th day of
August 1881 No 3564 is described a construction of lamp for lighting railway
carriages and for other purposes wherein a burner or burners projects or project
into a combustion chamber closed at the bottom by a transparent or translucent
diaphragm division or closure, there being a reflector below the said chamber.
Now according to our present invention we provide in the wall of the said
combustion chamber around or partly around the burner (or each of them when
there are more than one) a holo or series of holes to admit air into the combustion
chamber in such a manner that after entering the said chamber it may surround or
partly surround the flame to aid in maintaining the horizontal or approximately
horizontal direction of the flame and in supporting combustion and preventing
smoking and overheating of the combustion chamber. For some purposes, such
for example as lighting tramway cars and omnibuses we find it advantageous to
construct the lamp with a combustion chamber and reflector of square or oblong
form in plan, the walls of the reflector being suitably inclined and the diaphragm
or division of glass or other suitable transparent or translucent material being
interposed between them,

page_text: We, JOHN FULLER SHALLIS, of the Minories in the City of London, Engineer,
and THOMAS COOPER JOHN THOMAS, of the same place, Engineer, do hereby
declare the nature of said invention for "IMPROVEMENTS IN LAMPS OR APPARATUS
FOR LIGHTING RAILWAY CARRIAGES AND FOR OTHER PURPOSES and in what
mauner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
"
In the specification of former Letters Patent granted to us the 16th day of
August 1881 No 3564 is described a construction of lamp for lighting railway
carriages and for other purposes wherein a burner or burners projects or project
into a combustion chamber closed at the bottom by a transparent or translucent
diaphragm division or closure there being a reflector below the said chamber.
Now, according to our present invention we provide in the wall of the said
combustion chamber around or partly around the burner (or each of them when
there are more than one) a hole or serios of holes to admit air into the combustion
chamber in such a manner that after entering the said chamber it may surround or
partly surround the flame to aid in maintaining the horizontal or approximately
horizontal direction of the flame and in supporting combustion and preventing
smoking and overheating of the combustion chamber. For some purposes such for
example as lighting tramway cars and omnibuses we find it advantageous to
construct the lamp with a combustion chamber and reflector of square or oblong
form in plan, the walls of the reflector being suitably inclined and the diaphragın
or division of glass or other suitable transparent or translucent material being
interposed between them.
In the accompanying sheet of illustrativo drawings Fig 1 is a vertical section of
a portion of a lamp according to our invention and Fig 2 is a side elevation of a
portion of the same taken at right angles to Fig 1. Fig 3 is a horizontal section in
the line A. B of Fig 1.
a is the combustion chamber of square form in plan or transverse section
provided with a metallic chimney a and b is a burner cone projecting into the said
chamber. c is the series of holes formed in the combustion chamber a around the
burner cone b; through these holes air may enter the combustion chamber for the
purposes herein before stated. c. c are other holes for admitting air to support
combustion etcetera and similar to those shown and described in our said former
specification and f is an annular reservoir containing the oil or spirit for supplying
the burner. g is the reflecting chamber which as shown is of square form in plan
or transverse section its walls being inclined as shown to disperse the light.
Instead of being square the combustion chamber and the reflecting chamber may
cach be oblong as seen in plan. By this construction of combustion and reflecting
chambers we are enabled to employ an oil wick of greater breadth than is
practicable with circular chambers of moderate dimensions. h is the diaphragm or
division of transparent or translucent material interposed between the combustion
chamber a and the reflecting chamber g.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what|
wo claim is:-
In a lamp of the kind hereinabove referred to, providing in the wall of the
combustion chamber (a), around or partly around the burner cone (b), or around
each burnor cone if there be more than one, a hole or series of holes such as c, to

page_text: admit air into the combustion chamber in such a manner that after entering the
chamber the air shall surround or partly surround the flame of the burner cone
around which it entered so as to aid in maintaining the horizontal or approximately
horizontal direction of such flame and in supporting combustion and preventing
smoking and over-heating of the combustion chamber as described and set forth.
Dated this 24th day of December 1884,
W. LLOYD WISE,
Per F. J. Brougham,
Applicants' Agent.