Improvements in Lanterns.
Year: 1892

page_text: Date of Application, 26th Nov., 1892-Accepted, 21st Jan., 1893
COMPLETE SPECIFICATION.
Improvements in Lanterns.
I, PAUL HARTZENDORFF of 5 Fürstenstrasse, Berlin, Kingdom of Prussia,
German Empire, Manufacturer, 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 relates to a lantern designed especially for velocipedes, and my
object is to provide a lantern which may be easily taken to pieces, so that all parts
may be readily cleaned. My invention more particularly relates to the construction
of the frames by which the front lens and back reflector are held, and of the side
panes of the lantern.
My invention will be more fully understood by reference to the accompanying
drawings, in which:
Fig. 1 is a side elevation of my improved lantern.
Fig. 2 is a front elevation of the same, the lens and front reflector being turned
to the side.
Fig. 3 is a detail front elevation of the lens and front reflector.
Fig. 4 is a sectional elevation of the same parts.
Fig. 5 is a detail rear elevation of the back reflector.
Fig. 6 is a side elevation of the same.
Fig. 7 is a side elevation showing a modification of the back reflector.
Fig. 8 is a rear elevation of this modification.
Fig. 9 represents the inner face of the rear wall of the lantern and the parts
secured to this wall.
Fig. 9 is a cross-sectional view of the spring m.
Fig. 10 is a side elevation illustrating another modified form of the back
reflector.
Fig. 11 is a top view of the same.
Similar letters denote similar parts throughout the several views.
As the general construction of the lantern does not substantially differ from that
of the usual velocipede lanterns, I will describe but such parts to which my inven-
tion relates.
с
The lantern is made with a conical front reflector c which is provided with a
circular recess d on its inner side. Into this recess fits the elastic annular frame b
which is of such a cross-section as to enclose the edge of the lens a (Figs. 3 & 4);
I prefer to employ a biconvex lens. It will be obvious that the elastic frame >> may
be inserted into the reflector c from the wider front end of the same and will be
somewhat contracted as it is pressed against the walls of the said reflector, till it
comes in line with the recess d, when it will expand on account of its elasticity and
will thus be locked in its position. A suitable pressure from the inside will drive
the frame out of the recess d, so that the lens a may be easily cleaned.
The pin e (Fig. 2) of the hinge f on which the front reflector c turns when it is
opened, is formed in such a manner, that it may be removed by hand, without
employing any tool. The front reflector may then be entirely separated from the
lantern and easily cleaned, especially if the lens a has been taken out.
The lantern is also provided with a sliding lateral pane g (Figs. 1 & 2), which
when drawn down so as to close the lantern, will lock the oil-reservoir in its
position; when the pane is however pushed upwards, the oil-reservoir may be
withdrawn laterally from the case i and the interior of the lantern will then be
perfectly accessible.
Finally I will describe the .construction of the back reflector k which is secured
on the inside of the case i and which may be readily removed, referring first to

page_text: Figs. 2, 5 & 6. On the rear wall of the case i there is provided an arc-shaped
holder adapted to receive the edge of the back reflector k (Fig. 2). On the other
side of the rear wall of the case opposite the holder I, is a curved spring m which
also holds the reflector k. This reflector is provided with a ring n (Figs. 5 & 6)
which normally is in a horizontal position, but may be turned into the vertical
position and pressed against the case i so as to act as a lever and to release the
reflector from the spring m. The reflector may then be taken out of the case i. It
will be understood that in order to get at the ring n, one must at first raise the
lateral sliding glass-pane g.
In Figs. 7 & 8 I have shown a modification in which the ring n hinged to the
reflector k is provided behind the latter with a nose o of such a shape that the.
spring m is thereby brought into the position in which it holds the reflector; there-
fore it is not necessary to retract the spring by hand when the reflector is to be
inserted.
As illustrated by Figs. 9 and 94, the ring n may be dispensed with by providing
a hole p in the rear wall of the lantern and securing a nose o¹ to the spring m, so
that the latter may be retracted and the reflector pressed out by inserting a finger
through the hole p.
Lastly, as represented in Figs. 10 & 11, a nose o may be secured to or formed
on the ring n in such a manner that the reflector k is pressed forward and released
from the spring m when the ring n is brought into the horizontal position (Fig. 10)
and the nose o strikes against the rear wall of the case i.
Instead of the fixed holder l, I may also employ another spring similar to m.
I prefer to cover the concave surface of the reflector k with a layer of glass of
the same curvature as the reflector itself; the latter is thereby protected from
becoming dull in consequence of soot settling on the same.
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:-
1. A lantern having a lens held thereto by means of an elastic frame, for the
purpose set forth.
2. A lantern having a front reflector and a lens in the same, the lens being held
by means of an elastic frame for the purpose set forth.
3. A lantern having a front reflector and a lens in the same, the lens being held
by means of an elastic frame, which fits into a groove or recess in the reflector, for
the purpose set forth.
4. A lantern having a front reflector secured thereto by means of one or more
hinge-pins which can be removed by hand, for the purpose set forth.
5. A lantern having a back reflector secured thereto by means of a holder on one
side and a spring on the other side, the reflector being provided on this side
with a projection whereby it may be seized and removed, for the purpose set
forth.
6. A lantern having a back reflector secured thereto by means of a holder on one
side and a spring on the other side, the reflector being provided on this side with a
hinged ring, substantially as shown in Figs. 2, 5 & 6 of the accompanying drawings
and described with reference thereto, for the purpose set forth.
7. A lantern having a back reflector secured thereto by means of a holder on one
side and a spring on the other side, the reflector being provided on this side with a
hinged ring or other means for removing the same, and with a nose of such a form
as to automatically retract the spring, substantially as shown in Figs. 7 & 8 of
the accompanying drawings, and described with reference thereto, for the purpose
set forth..
8. A lantern having a back reflector secured thereto by means of springs,
substantially as and for the purpose set forth.
9. A metallic reflector having its reflecting surface covered with a protecting
layer of glass, substantially as and for the purpose set forth.

page_text: 10. In a lantern of the kind described, a lateral sliding glass-pane, substantially
as and for the purpose set forth.
11. A lantern having a back reflector secured thereto by means of a holder on
one side and a grooved or curved spring on the other side, the reflector being pro-
vided on this side with a hinged ring or lever having a suitable projection for
retracting the spring, and an extension which extends behind the reflector for
releasing the latter from the spring, substantially as shown in Figs. 10 and 11 of the
accompanying drawings and described with reference thereto, for the purpose set
forth.
12. A lantern having a back reflector secured thereto by means of a fixed holder
on one side, and an elastic holder on the other side, the elastic holder being provided
with means for retracting it, and the rear wall of the lantern having an aperture
through which a finger may be inserted for pressing the reflector forwards, substan-
tially as shown in Fig. 9 of the accompanying drawings and hereinbefore described,
for the purpose set forth.
Dated this 26th day of November 1892.
PAUL HARTZENDORFF,
By Geo. H. Rayner,
37, Chancery Lane, London, W.C., Agent for the Applicant.