Year: 1894

page_text: Date of Application, 27th June, 1894
2005
I, CHARLES HATRY of 57 Commandantenstrasse, Berlin in the Empire of
Germany, Merchant, do hereby declare the nature of this invention to be as
follows:-
My invention consists of a protective wire cylinder for incandescent mantle
burners.
The incandescent mantles of the well known Auer's incandescent lamp are often
rendered useless by the chimney or lamp glass breaking; and its splinters spreading
round injure the mantle. In order to remove this drawback, I have made a pro-
tective cylinder of wire netting, which cylinder corresponds in form to the lamp
glass and is either loosely inserted in this latter or is fastened to it. The wire
cylinder consists of wide meshed wire netting and is preferably of such diameter
that its outer surface is in contact with the inner surface of the lamp glass. Hooks
may be provided at the upper end of the wire cylinder which engage with the
upper edge of the lamp glass or chimney and thus enable the lamp glass and the
wire cylinder to be removed simultaneously from the burner gallery.
The protective wire cylinder forming the subject of this invention fulfils a double
object; First, being a good conductor of heat, it causes, on the lighting of the
flame, an even distribution of heat on the lamp glass, as it presses against the inner
side of the same. By this means, the breaking of the glass chimney in consequence
of unequal heating during the lighting of the flame, is as far as possible avoided.
Second, if the cylinder does break, the wire cylinder holds the several parts of the
same together and thereby prevents the splinters or fragments springing off the
same and injuring the mantle. If splinters should spring off they can only fall to
the outside. A lamp glass fitted with the protective wire cylinder, even although
already cracked, may continue to be used without danger until replaced.
Dated this 26th day of June 1894.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Incandescent Burners.
I, CHARLES HATRY of 57 Commandantenstrasse, Berlin in the Empire of
Germany, Merchart, 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 following statement :-
My invention consists of a protective wire cylinder for incandescent mantle
burners.
•
The incandescent mantles of the well known Auer's incandescent lamp are often
rendered useless by the chimney or lamp glass breaking, and its splinters spreading
round injure the mantle. In order to remove this drawback, I have made a pro-
tective cylinder of wire netting, which cylinder corresponds in form to the lamp
glass and is either loosely inserted in this latter or is fastened to it.

page_text: In the accompanying drawings :—
Figure 1 is a view of a lamp glass with a protective wire cylinder inserted
therein;
Figure 2 the upper part of the same, to which the wire cylinder is suspended by
means of hooks.
The wire cylinder 6 consists of wide meshed netting and is preferably of such
diameter that its outer surface is in contact with the inner surface of the lamp
glass, it being in the form of construction shown in Figure 1 simply inserted in the
latter.
In the modification shown in Figure 2, hooks c may be provided at the upper
end of the wire cylinder b which engage over the upper edge of the lamp glass or
chimney a and thus enable the lamp glass and the wire cylinder to be removed
simultaneously from the burner gallery.
The protective wire cylinder b forming the subject of this invention fulfils a
double object;
the same.
First, being a good conductor of heat, it causes, on the lighting of the flame, an
even distribution of heat on the lamp glass, as it presses against the inner side of
By this means, the breaking of the glass chimney in consequence
of unequal heating during the lighting of the flame, is as far as possible avoided.
Second, if the cylinder does break, the wire cylinder holds the several parts of
the same together and thereby prevents the splinters or fragments springing off the
same and injuring the mantle. If splinters should spring off they can only fall to
the outside. A lamp glass fitted with the protective wire cylinder, even although
already cracked, may continue to be used without danger until replaced.
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 :-
A protective device for incandescent mantle burners, consisting of a wide meshed
wire netting of cylindrical form open at both ends, and adapted to be loosely
inserted in the lamp glass or chimney or to be suspended therein by means of hooks
provided at its upper end substantially as described.
Dated this 20th day of March 1895
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.