Year: 1896

page_text: I, JOHANN BOHR, of No. 44 Embelgasse, Vienna V, in the Empire of Austria,
Gentleman, do hereby declare the nature of my said invention to be as follows:-
This invention relates to an improved protecting cap for lamp-chimneys con-
sisting of incombustible or refractory material (such as metal-enamelled or
not-porcelain, earthenware, china clay or asbestos with metal attachments) such
caps being applicable to chimneys for lamps of every description, especially those
which are employed for incandescent light.
The object of such improved cap is to prevent the glass chimney from cracking
on being subjected to an undue or sudden heating by conducting away part of
the heat by the metal attachments to protect the burner or incandescent body
from dust, glass-splinter's etc.; moreover, the 'cap is so firmly secured to the
chimney that a falling down of same is impossible.
Furthermore, this improved protecting cap, which can be permanently secured
to the lamp-chimney, serves as a protection for the articles such as the ceiling
above the lamp. The bottom rim of the protecting cap preferably consists of metal
and is provided with inner projections or tongues by means of which the cap rests
upon the upper edge of the chimney; the cap which is closed at the top is
provided with lateral openings which allow the gases of combustion to escape.
The rim projecting downwards from the tongues of the cap encloses the upper
part of the chimney and thus prevents a removal or falling down of the protecting
cap.
Since the cap is entirely or partly composed of metal being a good conductor
of heat and is in contact with the chimney by means of the projections, the heat
is quickly conducted away from the chimney, which is thus prevented from
cracking.
Consequently the delicate and easily destructible well known incandescent
bodies employed in incandescent lamps are protected from the pieces and splinters
falling down, on the chimney being cracked.
In order to prevent the protecting cap from falling down, which is desirable in
many cases, such cap may be provided with clasps, or other suitable devices,
which can either be secured to the cap or cut out of same and bent down.
1000

page_text: COMPLETE SPECIFICATION.
Improved Protecting Cap for Lamp Chimneys.
I, JOHANN BOнк of No. 44 Embelgasse, Vienna V, in the Empire of Austria,
Gentleman, do hereby declare the nature of my said 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 relates to an improved protecting cap for lamp-chimneys con-
sisting of incombustible or refractory material (such as metal-enamelled or
not porcelain, earthenware, china clay or asbestos with metal attachments) such
caps being applicable to chimneys for lamps of every description, especially those
which are employed for incandescent light.
The object of such improved cap is to prevent the glass chimney from cracking
on being subjected to an undue or sudden heating by conducting away part of
the heat by the metal attachments to protect the burner or incandescent body
from dust, glass-splinters etc.; moreover, the-cap is so firmly secured to the
chimney that a falling down of same is impossible.
Furthermore, this improved protecting cap, which can be permanently secured
to the lamp-chimney, serves as a protection for the articles such as the ceiling
above the lamp. In the accompanying drawing a perspective view of one construc-
tion of the protecting cap is shown. The bottom rim of the protecting cap
preferably consists of metal and is provided with inner projections or tongues b
by means of which the cap rests upon the upper edge of the chimney; the cap
which is closed at the top is provided with lateral openings a which allow the
gases of combustion to escape.
The rim a projecting downwards from the tongues 6 of the cap encloses the
upper part of the chimney and thus prevents a removal or falling down of the
protecting cap.
Since the cap is entirely or partly composed of metal being a good conductor of
heat and is in contact with the chimney by means of the projections, the heat is
quickly conducted away from the chimney, which is thus prevented from cracking.
Consequently the delicate and easily destructible well known incandescent
bodies employed in incandescent lamps are protected from the pieces and splinters
falling down, on the chimney being cracked.
In order to prevent the protecting cap from falling down, which is desirable
in many cases, such cap may be provided with clasps d or other suitable devices,
which can either be secured to the cap or cut out of same and bent down.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
: Improved protecting cap for lamp-chimneys consisting of metal-enamelled
or not enamelled, or of porcelain, earthenware, china clay with metal attachments
such cap being closed at the top and provided with lateral openings a, inner
projections or tongues 6 in the lower part or also with clasps d'or other suitable
devices which can either be secured to the cap or cut out of same and bent down
substantially as described and shown in the drawing.
E. P. ALEXANDER & SON,
Chartered Patent Agents,
19, Southampton Buildings, Chancery Lane, London, W.C.,
Filing Agents.