Year: 1897

page_text: A communication to me from HANS MUNZEL, of Falkenau, Bohemia, in the Empire
of Austria, Factory Owner.
I, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 65 and 66, Chancery Lane, in the County of Middlesex, 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, and
accompanying drawing, that is to say :-
This invention has for its object an improved silvered glass reflector and a novel
method of making the same. In the improved reflector injury to the silver reflecting
surface is impossible, and loss of light through the central opening of the reflector
is prevented.
In the accompanying drawing, which is in illustration of the invention, Figure 1
is a vertical section through the glass reflector after it has been blown by a glass
blower.
Figure 2, the same after the bottom has been pressed up; and Figure 3 a section
through the finished reflector.
The glass reflector, after it has been blown, is brought upon a bench to the form
shown in Figure 1. It is then again heated, and placed upon a suitable support,
and the flat bottom is forced up by a wooden block or pattern of the exact form of
the interior of the reflector, the latter as well as the forming block being constantly
turned round. The block has a projection at its upper end, by which the exact
position and size of the opening into which the frame or support of the lamp is to fit,
is marked. This opening, so indicated, is then cut out by means of emery in the
usual way, the hole being bored vertically so as to prevent any scattered emery from
scratching or injuring the reflecting surface.
When the hole has been cut, the reflector is cleaned inside and is silvered in the
usual way between the double sides which have been formed as described. The
opening is temporarily closed with an indiarubber stopper, the upper part of the
blown glass removed, and the metal holder, which completely closes the inner part
of the reflector, inserted.
The reflector is bored out as described to suit the particular kind of incandescent
lamp which is to be used, so that the metal holder fits it exactly and prevents any
light from escaping upward; or the reflector can be carried by the same ring which
carries the lamp holder, as illustrated in Figure 4, a separate holder for the reflector
being in this case unnecessary.

page_text: Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The double sided reflector, for electrical-incandescent lamps, of suitable form
and colour, having a central opening exactly fitting the lamp holder, so that the
loss of light upward is prevented, substantially as described and illustrated.
2. In reflectors constructed according to Claim 1, the method of construction and
arrangement by which the holder of the lamp, and the reflector itself, are
simultaneously supported by the same carrier, substantially as described and
illustrated.
3. The process for making the reflector described and claimed in Claim 1, consisting
in blowing the reflector in such form that when reheated, the bottom can be bent
up by a suitably formed tool, whilst the latter as well as the reflector are kept
moving round horizontally, so as to form a double wall to the reflector, a projection
upon the upper end of the tool marking the position of the central opening which is
bored out by means of emery, the space between the double walls being then silvered,
and the upper end closed by a metal holder, substantially as described and illustrated.
Dated this 27th day of May 1897.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicant.