Improvements in Reflectors for Electric and other Lamps and Lights.
Year: 1892

page_text: Date of Application, 5th Nov., 1892
Complete Specification Left, 3rd Aug., 1893-Accepted, 16th Sept.. 1893
PROVISIONAL SPECIFICATION.
Improvements in Reflectors for Electric and other Lamps and Lights.
We, PERCY GARNISS EBBUTT and JOHN BENJAMIN VERITY, both of Plume
Works, Aston, Warwickshire, Electrical Engineers, do hereby declare the nature
of this invention to be as follows:-
This invention consists of the hereindescribed improved construction of reflector
for electric lamps and for gas and oil lamps or lights. This invention is adapted
more particularly for use with lamps or lights for lighting pictures the reflector
being so constructed as to diffuse the rays of light and effectually prevent any
bright points of light being reflected on to the picture.
One form of our said improved reflector is like a hollow truncated pyramid
and a smaller pyramid in combination that is to say, the larger truncated pyramid
has an open base through which the light is reflected by the sides which are
formed as reflectors inside, and the small pyramid forms the top of the truncated
pyramid the open base of the smaller pyramid coinciding with the open truncated top
of the larger pyramid and the sides of the smaller pyramid making a more acute
angle with the base than do the sides of the larger pyramid, so that the rays
of light from the lamp or light with which the reflector is used will be reflected
through the base directly from the sides both of the large and of the small
pyramids. The base of the pyramid may have any number of sides.
When making our said improved reflector for use with two or more lights
arranged in a group the truncated pyramid has, instead of one small pyramid,
two three or more small pyramids side by side or arranged in a group these
smaller pyramids corresponding with the number of lamps or lights in the group
with which the reflector is used.
Dated this 3rd day of November 1892.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Reflectors for Electric and other Lamps and Lights.
We, PERCY GARNISS EBBUTT and JOHN BENJAMIN VERITY, both of Plume
Works, Aston, Warwickshire, Electrical Engineers, 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 consists of the hereindescribed improved construction of reflector
for electric lamps and for gas and oil lamps or lights. This invention is adapted
more particularly for use with lamps or lights for lighting pictures the reflector
being so constructed as to diffuse the rays of light and effectually prevent any
bright points of light being reflected on to the picture.
We will describe our invention by referring to the accompanying drawing on
which
Fig. 1 is a side elevation, Fig. 2 is a plan of a reflector constructed according to
this invention for electric and other lamps and lights;
Fig. 3 is a section of the same shewing how the rays of light are reflected from
the sides of the reflector ;
Fig. 4 is a side elevation and Fig. 5 is a plan of another form of our invention
arranged for a group of three lights and

page_text: Fig. 6 is an elevation and Fig. 7 is a plan of another form of our invention
arranged for a group of three lights.
The same letters of reference indicate the same or corresponding parts in all the
figures of the drawing.
One form of our said improved reflector (shewn by Figs. 1 2 and 3) is like a
hollow truncated pyramid and a smaller pyramid in combination that is to say, the
·larger truncated pyramid A has an open base a through which the light is
reflected by the sides a' a' a³ a a' a' which are formed as reflectors inside, and
the small pyramid B forms the top of the truncated pyramid A. the open base 6¹
of the smaller pyramid B coinciding with the open truncated top of the larger
pyramid A and the sides 61 62 63 64 66 of the smaller pyramid B making a more
acute angle with the base than do the sides a¹ a² as a' a' as of the larger pyramid A
so that the rays of light from the lamp or light C with which the reflector is used
will as shewn in Fig. 3 be reflected through the base a' directly from the said sides
of both the large pyramid A and of the small pyramid B; instead of striking the
opposite sides of the reflector and causing bright spots of light on the picture or
other surface which is lighted by the lamp as would be the case if the reflector
were made as one truncated pyramid instead of two truncated pyramids combined
together as herein set forth. The base of the pyramid may have any number of
sides.
When making our said improved reflector for use with two or more lights
arranged in a group the truncated pyramid A has, instead of one small pyramid,
two three or more small pyramids B side by side (see Figs. 4 and 5) or arranged
in a group Figs. 6 and 7 these smaller pyramids B corresponding with the number
of lamps or lights in the group with which the reflector is used.
In conclusion we wish it to be understood that we do not confine ourselves to any
particular number of the sides of which our compound pyramidal reflectors are
formed; we have found the forms shewn on our drawings to answer well in practice
but it will be evident that the pyramids may be made with a larger or a smaller
number of sides without departing from the nature of our invention.
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-
The improved construction of reflector for electric lamps and for gas and oil
lamps or lights herein before described with reference to the accompanying drawings,
the said reflector consisting of a hollow truncated pyramid with open base and
combined substantially as set forth with one or more smaller pyramids the sides of
the smaller pyramid or pyramids making a more acute angle with the base than do
the sides of the larger pyramid so that the rays of light are reflected directly from
each side through the open base of the pyramid, as hereinbefore set forth.
Dated this 2nd day of August 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.