New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1914-07-12
ENGINEERS STUDY
LIGHTING PROBLEM
Auto Experts Expect
Widespread Legislation
in This Direction.
VARYING METHODS
TO REDUCE GLARE
One Type of Glass Is Claimed to
Eliminate the Blue and
Violet Rays.

Anticipating widespread Legislation
against glsring headlights, the Society
of Automobile Engineers has turned
its attention to the problem, and will
seek means for remedying what is so
commonly regarded as a growing men
ace 70 public safety. At its meeting
at the Automobile Club Of America a
few days ago the metropolitan section
of the society gave a demonstration OF
glare reducing devices, at which nine
different methods OF preventing the
binding effects of headlights were of
fered for comparison.
In addition 20 practical demon
stration of the devices themselves, rep
resentatives of the producers gave
brief explanations Of the principles IN
volved, illustrated with lantern sides.
This is recognized as the beginning of
the work Of the society in this direc-
ton. 1t is not unlikely that other To-
cal sections will hold similar meetings,
while ultimately the matter will come
before the standards committee for
COnSlutIdllOus III NNNN4 No'NN 800
vote passed AT the recent summer
meeting at Cape May. y. j.
Two distinctly different types Of
anti-glare devices were displayed at
the meeting last week. In ore type
the glaring rays are controlled in such
a way that they are either cut off en-
tirely or diverted from the eyes of the
observer In the other and more radi-
cal type of device an attempt is made
to eliminate the binding effect by
screening the light in such a manner
as to eliminate the blue and violet
rays. which are believed to constitute
the irritating influence in a glazing
light.
The system last described was shown
by William Churchill, of the Corning
Glass Works, whose amber colored
"No-Glare" headlight glass is colored
by scientific process. with a view TO
securing the desired alteration Of the
light rays. II is claimed that whereas
the dazzling effect is completely elm
mated, the actual illuminating effect is
reduced only Is per cent.
Leonard Kebler, on behalf of the
Ward Leonard Electric Company,
showed "No-Daz" lamp. in which the
binding effect is cut off by the inter
position of an amber screen in 'front.'
Of the light, and which is operated IN
much the same way as an ordinary
headlight DINNER.
The Matisse reflector, which was de-
monstrated by Norman Macbeth, the
lighting expert, is q silver backed glass
reflector, which is so designed that the
light is controlled and concentrated
in limited zone. The IN lens,
which is produced by the H. W. Johns,
Manville Company. is so constructed
as 70 soften and disperse all rays eX-
cept those that are directed downward
in the immediate path Of the car.
Other devices shown and tested were
the Legalight, Middleton reflector and
Dim E-Lee, the last named being de-
vice for temporarily reducing the can
dlepower Of the lamp itself
In connection with the discussion It
was brought out that automobile heal
lights are often rendered inefficient
through improper focusing Of the
lamp in the reflector and also by the
distortion of the supporting bracket
the importance of overcoming these
difficulties as means OF eliminating
stray rays that often increase the daz-
cling effect being emphasized.
Another important point brought out
was that with the modern concentrated
filament electric lamp the same ilumi-
mating effect can be produced with a
great deal less candlepower, and con-
sequently less current consumption,
than with the older forms of lamps, d
considerable proportion OF the rays
from which are absolutely wasted.