IMPROVEMENTS IN SHADES OR LANTERNS " FOR ELECTRIC OR OTHER LIGHTS
Year: 1879

page_text: LETTERS PATENT to Henry Vander Weyde, of Regent Street, in the County of
Middlesex, for the Invention of IMPROVEMENTS IN SHADES OR LANTERNS
"
FOR ELECTRIC OR OTHER LIGHTS."
Sealed the 5th August 1879, and dated the 8th February 1879.
PROVISIONAL SPECIFICATION left by the said Henry Vander Weyde at the
Office of the Commissioners of Patents on the 8th February 1879.
HENRY VANDER WEYDE, of Regent Street, in the County of Middlesex. "IM-
PROVEMENTS IN SHADES OR LANTERNS FOR ELECTRIC OR OTHER LIGHTS."
My Invention relates to improvements in the construction of reflecting shades
or lanterns designed more especially for enclosing electric lights, although they may
also be caployed for gas or other lights used for outdoor and indoor illumination.
The object of the Invention is to completely screen the light from view and
convert intousity of light into volume of light without the use of the opal or ground
glass, globes, or shades at present employed by which about 60 per cent. of the light
is obstructed, and to utilise the whole or nearly the whole of the upwardly dispersed
rays which are usually lost in street lighting.
My Invention consists of an armillary arrangement of reflectors surrounding the
Jantern in parallel zones above and below the level of the luminous focus. These
annular reflectors are in two sets separated by an equatorial band or prism and
they are slightly concave, the upper sct on their lower surface and the lower set on
their upper surface, and they are so formed and spaced as to intercept the whole of
the upwardly and downwardly projected rays and divert them horizontally in all
directions, or the reflectors may be so formed and arranged as to project horizontal
beams of light in certain directions only as required. The equatorial band which
occupies the spaco between the upper and lower sets of reflectors is preferably a
glass prism or lens of annular form, by which the light may either be refracted
horizontally or upwards and downwards upon the nearest reflectors; as preferred.
These reflectors and prism may either encircle or be contained within a clear
glass globe to protect the light from the wind if necessary, and they are supported
on a frame composed of vertical ribs presenting a very narrow edge to the light so
as to cast as little shaddow as possible.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Vander Weyde in the Great Seal Patent Office on the 8th
August 1879.
HENRY VANDER WEYDE, of Regent Street, in the County of Middlesex.
PROVEMENTS IN SHADES OR LANTERNS FOR ELECTRIC OR OTHER LIGHTS."
"IM-
My Invention relates to improvements in the construction of reflecting shades
or lanterns designed more especially for enclosing electric lights, although they may
also be employed for gas or other lights used for outdoor and indoor illumination.
The object of the Invention is to completely screen the light from view, to convert
intensity of light into volume of light (without the use of the opal or ground glass,
globes, or shades at present employed by which about 60 per cent. of the light is
obstructed); and to utilize the whole or nearly the whole of the upwardly-dispersed
rays which are usually lost in street lighting.
In order that my Invention may be more readily understood, I have illustrated
an example of it in elevation in the accompanying Drawing, and I will proceed to
describe it with reference thereto.
a
'My Invention consists of an armillary arrangement of reflectors A, A, A, A,
A, A, A, A, disposed in parallel zones above and below the level of the luminous
focus C. These annular reflectors are in two sets separated by an equatorial band
or prism D, and they are preferably slightly concave, the upper set A on their lower
surface and the lowor set A¹ on their upper surface a¹, the reflectors being so
formed and spaced and the inclination and concavity of their surfaces being such
that they intercept the whole of the upwardly and downwardly projected rays,
which, falling on these inclined concave surfaces are diverted horizontally, as indi-
cated by the arrows, in all directions if, as would generally be the case, the
reflectors are circular in plan or in certain directions only, if instead of being
circular they are polygonal.
For instance, they may be square, in which case four horizontal beams of light
would be projected in four directions at right angles to one another or oblong to
suit picture galleries, in which case two or more lights in line may be placed in the
same lantern.
The reflectors are preferably made of sheet metal (although other material may
be used, such as glass mirrors), and the surfaces a, a', are either painted white,
enamelled, or polished. When it is desired, as in the case of picture galleries, that
the rays should be reflected in a slightly downward direction for the proper illu-
mination of the pictures I incline the reflectors accordingly. The equatorial band D
which occupies the space between the upper and lower sets of reflectors is pre-
ferably a glass prism or plano-convex lens of annular form, by which the light
falling upon it may either be refracted horizontally or upwards and downwards
upon the nearest reflectors, as preferred. It may also be a ring of opal glass, or
it might be dispensed with when the light is not so intense as to render the
direct rays objectionable.
These reflectors, and prism may either encircle or be contained within a clear
glass globe to protect the light from the wind if necessary, or they may be wholly
contained within a similar globe of larger size. In either case the reflectors are
supported on a frame composed of vertical ribs E, presenting a very narrow edge
to the light so as to cast as little shadow as possible.
some
cases, as for street lighting, the upper set only, or for interiors, the lower
set only of reflectors may be used, the opposite half of the globe being opal glass.
Having described the nature of my Invention, and the manner of performing
the same, I declare that what I claim as my Invention to be protected by the herein-
before in part recited Letters Patent is,
111, 1
1
The employment in combination with an electric or other light of a series of
reflectors placed one above the other above or below the level of the light (or both),

page_text: the said reflectors being so formed and disposed as to intercept and reflect in the
desired direction all rays radiating in other directions, substantially as herein shown
and described.
In witness whereof, I, the said Henry Vander Weyde, have hereunto set my
hand and seal, this Eighth day of August, in the year of our Lord One
thousand eight hundred and seventy nine.
HENRY VANDER WEYDE. (L.S.)