Indiana daily times. [volume] (Indianapolis [Ind.]) 1914-1922, 1921-11-21
GIVES
MOTOR LIGHTS
REGULATIONS
Secretary of State Lays Down
Rules in COnfOrmance With
Act of 1921.
EDICT IS FAR REACHING

ACT or 1871.
EDICT IS FAR REACHING
An announcement of great importance
to the owners of motor vehicles of all
types in Indiana was issued today by Ed
Jackson, secretary Of State, comprising
the regulations prepared by T. J. Tay-
Tor, State automobile light engineer. COW
ering the use of automobile or motor
vehicle headlights on the streets and
highways of the State. This is in con
Torrance to an act of the 1921 General
Assembly.
Seeking to safeguard the highways and
motor travel at nigh, the new regula-
lions represent the advanced thought of
the Society Of Illuminating Engineers
and the Society Of Automotive Engineers.
This announcement of Secretary Jack
son is issued through the Hoosier State
Automobile Association, which organiza-
ton has prepared to cooperate with the
secretary of State in the application and
enforcement OF the regulations and 4
Statewide educational campaign. The
active cooperation of the Indiana Auto
motive Trade Association is also pledged.
'Trese regulations have been compiled
with bit one view in mind" declares Sec
rotary Jackson. This is to establish a
set of uniform light conditions for motor
vehicles operating on the public highway
that will add to safety and convenience
of night driving and to safeguard the
lives of all persons using the streets and
highways Of Indiana after dark"
IN EFFECT
IN 80 DAYS.
announcement is made that the regu-
lations will become in full force and effect
in thirty days from this date. The sec
rotary points out that, to comply with
the regulations it win be necessary for
each mOtOrist in Indiana to give attention
to the following items:
1. Equip headlights with proper de-
vice for DETECTING the light rays &C
cording 10 the -four point test, as de-
scribed hereinafter.
2 Install lamps Of proper candle power
rating for the device used. CMaximum
candle power permitted is 32).
8. Adjust lamps to proper focus IN the
rehectors to comply with the require
ments OF the device used for detecting
rays
4. Adjust or equip headlights to give
the light beam the proper tilt on road
way.
The Indiana specifications are now vir
tuallr the same as have been adopted by
New York, Massachusetts,. Connecticut
Maine, Ohio, Pennsylvania. Vermont, Wis
consin, Iowa and other States They will
require a stringent cleaning house" on
all make-shift devices now on automo-
biles, trucks, motorcycles OF other mo-
tor vehicles. The new regulations viii
not permit the use Of devices which tend
TO diffuse or spread the light from head
lamps in wide circle
FOUR POINT
TEST PHASES.
In the -four point test, varying regu-
lations are prescribed for passenger auto /
mobiles, slow moving trucks and motor
cycles. In addition to setting forth re-
quirements for DETECTING devices, the
regulations provide for the use OF
auxiliary bulbs in front headlamps or
resistance type dimming Of the main
bulbs. It is provided that on well lighted
streets or highways, cities or towns may
require the sole use OF these auxiliary
bulbs or dimmed lights. no matter II the
headlamps are equipped with legal de-
fecting devices. Notice Of enforcement Of
this provision must be given by posting
suitable signs on such well illuminated
highways.
The lighting engineers Specifications
for the "fOur-pOint" test for headlights
provides that a screen or plane surface
perpendicular to the roadway be used.
This is stationed 100 feet in front Of the
motor vehicle, which shall stand on a
level surface.
Point No. / is indicated as being seven
feet TO the left of the center axis Of the
vehicle. 100 feet distant and sixty inches
above the level surface on which the We
hicle stands. At this point the light in
tensity shall not exceed 500 candle power.
It is highly important to note in cOunec-
ton with all these tests that the require
ments stipulate the tests must be made
with the vehicle fully loaded, according
to its use and capacity.
Point No. is on a line directly IN
front Of the center axis Of the vehicle, 100
feet distance and 100 inches in height.
at this point the regulations declare TIE
passenger car lamps shall register not.
to exceed an intensity Of 2.i0O candle
power This intensity must not be ex-
ceeded at q distance higher than the pre-
scribed 60 inches above the level on which
the vehicle stands.
POSITION OF
POINT NO. 3.
Point No. 3 is directly in front Of the
center axis Of the vehicle 90 feet dis
tant and at One-half of the height from
the ground level to the source Of the light.
At this point it is required that auto
mobile headlamps shall register a light
intensity Of at least 1900 candle power.
Slow speed trucks shall register light
intensity OF 1,2O0. ana motorcycles lAe
same at this point. This is the point
of greatest lightning intensity in front
Of a motor vehicle.
Point No. is seven feet to the right
Of the center axis Of the car, 100 feet dis
tant, and at one-half the height between
the ground level and the light source.
Here it is required that the minimum
light intensity for automobiles shall be
100 candle power, and for slow speed
trucks 800 candle power. The required
intensity at this point assures good
ditch light.
secretary Of State in this announce
irnent declares that all devices that meet
the specifications and laboratory tests of
the technical department will be given
certificates OF approval for use on We
hicles under proper conditions. At pres
ent. II is stated. only a few manufactur-
ers have paid the required fee and sub
mitted to the tests. A few devices have
been approved and others, II is under
stood are expected to meet the tests.
o. K DEVICES
To BE ANNOUNCED.
Devices which are to be approved Will
be announced in a subsequent statement.
nv which the owners Of motor vehicles
viii be guided in their selection OF
proper equipment.
Attention is called TO the necessity OF
making the proper adjustment Of lamps
after the approved devices are fitted. II
being essential in most cases to see that