Up: Luxfer Prism
1906 Sweet's
4 of 9
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| INSTALLATION. |
Pitch of skylight for best results should be
57 to 60 degrees to the vertical. The top edge of skylight should be as
near the ceiling line as possible. Every skylight should be equipped with
sash ventilators.
When requested to do so, we will be pleased to
have our experts examine the premises or drawings, with a view to
determining the proper setting angle. Should it not be convenient for
architects to take the matter up in this manner, we suggest 57 degrees
as the proper angle for average conditions.
A dark, cheerless room can be made bright and
cheerful by changing the glass in the old skylight to Luxfer Prisms.
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IMPERIAL
PRISM GLASS. |
Perfection--The manufacture of Imperial
Plate Prism Glass has placed the illuminating prism on a pinnacle of highest
excellence; it is sold by the American Luxfer Prism Company as exclusive
agents, and manufactured under patents by the Pressed Prism Pate Glass
Company of Morgantown, W. Va. We can furnish this product with accurately
shaped prisms, and the appearance and finish of the best plate glass, but
far superior in value because of its light-diffusing qualities.
Character--The maximum dimensions of plates
are 54 inches wide by 60 inches deep. If the opening be larger than the
maximum plate, neat metal bars can be provided for dividing the space as
may be required; or if smaller, the plates can be cut to any size. The body
or back of the plate, exclusive of the prisms, is about the same thickness
as plate glass. The prism surfaces are carefully figured and perfectly
shaped with a smoothness and finish only attained under heavy pressure and
by the most careful workmanship. The smooth surface is ground and polished,
and when placed with plate glass gives the front a uniform appearance
obtainable with no other product.
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| IMPORTANT. |
Results--The same careful attention is
employed to maintain the degree of efficiency secured by our standard 4-inch
pressed units. Plates of many prism angles are made which insure the
successful solution of all problems, however difficult. One advantage over
the glazed units is the eliminating of all metal, this adding greatly to
the refracting surface of an equal area. This product must be distinguished
from rolled Sheet Prisms, a cheap and less perfect product having neither
perfectly formed prisms nor polished outside surface, being designed only
for factory purposes. The large unbroken surfaces of the Pressed Prism
Plates make them easy to clean, joints where dust and dirt accumulate are
done away with and no difficulty will be found in keeping them as clean
as plate glass.
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USE OF LUXFER
SIDEWALK
PRISMS. |
It is a well known fact that the space in the
basement of a building is of greater value for salesroom purposes than the
second floor, if equipped with Luxfer Sidewalk Prisms. In basement rooms
where the ceiling is above or on a level with the sidewalk the Luxfer
Sidewalk Prism is used with great results. It is set in cement in the
usual cast-iron frames (Fig. 18), in place of the ordinary bull's-eye
lights. The prisms receive the direct light from the sky on the upper
face and refract it back into the basement where it is needed, and are
scientifically correct in form to obtain the greatest possible refracting
surface and to utilize every ray of daylight. Therein lies the secret
of the superiority of Luxfer Prism Sidewalks.
Unless the basement is very shallow a Lucidux
is set below and opposite the prism tiles, as shown in the accompanying
cut. The Lucidux is a vertical curtain of window prisms of varying
angles.
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