A New and Improved Reflector in connection with Glass Bulbs or Glow Lamps for Electrical Lighting.
Year: 1896

page_text: Date of Application, 14th May, 1896
Complete Specification Left. 13th Mar., 1897-Accepted, 17th Apr., 1897
PROVISIONAL SPECIFICATION.
A New and Improved Reflector in connection with Glass Bulbs
or Glow Lamps for Electrical Lighting.
GEORGE WILLIAM PRIDMORE Designer 2 Broad Street Buildings E.C. THOMAS
JOHN STURGEON Art Metal Worker, 2 Broad Street Buildings E.C. EDWIN YORKE
Colliery Agent 13 Essex Road Watford Herts, do hereby declare the nature of this
invention to be as follows:-
This invention relates to an improvement in connection with glass bulbs or glow
lamps for electrical lighting and consists in the employment of silver or silvered
wire, thread, or other light metal or of any other material deemed most suitable,
being wound around any part of the said bulb. By this means the wire, thread,
or any other suitable material is made to act as a reflector but in a very simple
and effective form. By this our invention bulbs of any shape or form, can be
fitted with this improvement, as the wire or other suitable material can be wound
round the bulb in the same manner as cotton is on to a bobbin or string on to
the handle of a cricket bat. To keep the wire, thread, or any other suitable
material in position, we do so in the best way we consider the most advantageous.
Dated this 13th day of May 1896.
GEORGE WILLIAM PRIDMORE.
THOMAS JOHN STURGEON.
EDWIN YORKE.
A New and Improved Reflector in connection with Glass Bulbs
or Glow Lamps for Electric Lighting.
We, GEORGE WILLIAM PRIDMORE, Designer, of 2 Broad Street Buildings, in
the City of London, THOMAS JOHN STURGEON, Art Metal Worker, of 2 Broad
Street Buildings, in the City of London, and EDWIN YORKE, Colliery Agent, of
13 Essex Road, Watford, Herts, 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:-
This invention relates to a new or improved reflector which is specially intended
for electric glow lamps, and which is produced by winding upon the exterior of
the lamp a number of convolutions of wire or thread composed of silver, aluminium,
glass, or any other substance possessing a bright and untarnishable surface. The
finely corrugated reflecting surface thus obtained renders our lamp much more
efficient than one with which is used an ordinary reflector having a smooth surface.
In order that our invention may be fully understood and readily carried into effect
we will proceed to describe the saine more fully with reference to the accompanying
drawing, in which :-
Figure 1 is an elevation and Figure 2 a longitudinal section of an electric glow
lamp provided with our improved reflector.

page_text: A is the lamp and B B are the convolutions of wire or thread with which it is
wound as above stated.
In order to effect this winding in a satisfactory manner we prefer to mount the
lamp in the chuck of a lathe or similar apparatus for imparting thereto a rotary
motion. The end of the wire or thread with which the lamp is to be wound is
then connected to the metal ferrule a by solder or other suitable means. The lamp
is then revolved to cause the wire or thread to be wound on to the lamp until
it has been covered therewith for about half its length or otherwise, the said wire
or thread during the winding operation being guided by hand or by a suitable
travelling device with which the winding apparatus is provided. In order to
ensure that the wire shall keep its position upon the lamp we prefer to apply
soluble glass solution to the said wire during the winding operation. The end of
the final couvolution of wire, after the completion of the winding, may be joined
to the preceding convolution by solder or other appropriate substance. The external
surface of the convolutions of wire or thread may be coated with any suitable
paint or varnish which will serve to prevent the air from finding its way between
the convolutions and tarnishing the inner or reflecting surface.
If glass thread be employed for the reflector it is wound upon the bulb in a
heated condition as will be well understood by glass workers, and the outer surface
of the convolutions can be coated with a reflecting substance like that used in
the manufacture of mirrors; or the glass thread may be tinted instead of being
silvered.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A reflector composed of a number of convolutions of bright and untarnishable
metallic wire or glass thread for the purpose specified.
2. An electric glow lamp provided with a reflector formed substantially as described
with reference to the accompanying drawing.
Dated this 13th day of March 1897.
HASELTINE, LAKE & Co..
45 Southampton Buildings, London, W.C., Agents for the Applicants.