Dust Protector for Incandescent Gas Lamps.
Year: 1894

page_text: Date of Application, 23rd July, 1894-Accepted, 25th Aug., 1894
COMPLETE SPECIFICATION.
Dust Protector for Incandescent Gas Lamps.
I, NOE BERLIN Jr., Manufacturer, of 6, Karolingerring, Cologne, Province of
Rhineland and Kingdom of Prussia do hereby declare the nature of this inveution
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
Up to the present the incandescent gas lamps suffered from the disadvantage of
the stockings being dirtied by the dust that fell down on them from above. It has
been proved that the illuminating power of the stockings suffers to such a degree
from the effects of the dust that it is sometimes diminished by 50%. It is true
that one might endeavour to obviate this evil by putting on little chimney covers,
but these covers would not prove practical, as in lighting as well as in putting out
this kind of incandescent gas lamps, which are generally placed at a considerable
height, one has first to get on a chair in order to be able to take off the covers or
put them on again. It is plain that in case of a large number of lamps, this takes
up much time and is troublesome, besides the fact of the covers being easily lost.
In order to do away with these disadvantages, I have constructed the apparatus
described in the following pages and explained by drawings and which may be
attached to every incandescent gas lamp and on the gas-cock being turned on or
off automatically effects the closing or opening of the chimney.
The arrangement as shewn in Figs. 1 and 2 of the drawing is for incandescent
burners with ordinary cocks, while that represented in Figs. 3 and 4 is for those
with elbow-cocks; Fig. 5 shews a detail of the latter arrangement, and in Figs. 6
to 8 a modified form of the apparatus is represented.
The apparatus consists principally of a chimney-cover a made of any kind of
material as metal, glass etc., which, as shewn in Figs. 1 and 2 either has a rim
projecting beyond the chimney, or is made as in Figs. 2 and 4 without any rim.
Both forms may be made of any shape. This cover is attached to a rod b having
at the bottom an eyelet for the reception of the draw-rod d and passing loosely
through the cylindrical case c, which is secured in a suitable manner to the chimney
of the lamp, either by a wire g (Figs. 1 and 2) or a spring-holdfast h (Fig. 3) etc.
In this cylindrical case is a spiral-spring which with its one end rests against the
bottom of the case and with the other against a clamp i attached to the rod b.
The rod d is either directly secured by means of a joint k to the key of the gas-
cock, as may be seen from Figs. 1 and 2, or, especially in the case of elbow-burners
being used, where the cock is not below but at the side of the burner, this joint is
effected by means of an angle-lever attached to the knee of the burner and the
middle-piece (Fig. 5) secured to the key of the cock and the draw-rod m.
In the simplified construction represented in Figs. 6 to 8 instead of the long
glass chimney hitherto used, one of half the height is employed, and upon it is
placed a tin chimney o corresponding to the missing half. This cylinder has near
to its upper rim a guide-eyelet p which together with the eyelet 9 in the gallery
In case
of the burner forms the guide for the rod s bearing the chimney-cap r.
the appliance is to be used in pointed burners, as shewn in Fig. 6, the rod s is
diminished at the bottom and the diminished part passes freely through a slit of a
double-bent arm t attached to the key of the cock.
When the cock is opened the arm t is moved upwards and in doing so also pushes
upwards the rod and the cap, while on the cock being shut the rods falls and
causes the cap to lie on the chimney.
The apparatus described in Fig. 7 for elbow-burners differs from the one already
described in so far that the key of the cock is fitted with an arm u provided with

page_text: an eyelet, to which arm an intermediate rod v is attached, the other end of which
is jointed to the rod s.
It goes without saying that many modifications may be made in the arrangement
of the capa, as well as in the mechanisms that actuate them as far as the material
and the shape is concerned.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
"
Automatic dust protector for incandescent gas lamps formed by a cover of any
shape for the upper opening of the lamp chimney and so arranged that this cover
is connected in such a manner with the gas-cock by suitably arranged guided joints
or rods attached to the chimney or burner that on the cock being opened, it is
lifted off from the chimney and on the cock being closed it again settles on the
chimney.
Dated this Third day of July 1801
For NOE BERLIN, JR.,
B. Brockhues.