Milford chronicle., 1922-02-03
Tilt per 100

Universal None
Violet Ray None
Attention is directed to the fact that only certain
types models of certain makes of lenses are approved
and each driver should assure the model he
uses is actually of the approved type Furthermore it
will noted that in of Ford 1t is required tnaL
he green visor head lamp be installed complete other
words the is unsatisfactory and unapprOved
when applied to other type lamps.
It is not sufficient merely that the headlights should
be equipped with approved lenses In fact the lense it.
self only of number of factors of equal impor
tance In the first place, the candle-power of the lamp
must greater than Is in what is known vacuum
type" bulbs and q in gas filled" bulbs. Drivers will find
however, that these bulbs Of sufficient power the
headlights properly focused and adjusted 1t will be
noted further that IN the aboye table there are TWO
umns headed Focal Adjustment" and the other Tit
per Hundred Feet" These both matters of extreme
Importance and if the focal adjustment and tilt are not
properly made drivers will be stopped the roads and
warned and if they persist IN dsTegardng these mateI
arrested and probably fined 1t is therefore essen
ta know just what is meant by focal adjustment and
tilt
For every type of approved lense there is exact po-
stion which the ncandescent ament of the lamp must
be placed relation to the reflector itself The lamp it.
self must of be located centrally with respect to
edges of the reflector but provision made in every
lamp it's adjustment backward forward inside the
reflector These focal adjustments numbered the
list and readily made by any driver First the ense
removed and the is placed level ground 20 it.
from wall or other smooth object The headlights
turned and lamp is covered with robe other
article mask its light For focal adjustment No l, the
arn is moved backward or forward until the spot of
light which it throws the wall is the smallest obtain
able focal adjustment No. is desired the lamp is
moved forward until the spot is large possible but
is halfway between No and No. 2 while in focal ad-
justment the moved back until the light spot
large possible but without dark in the centre
These adjustments may be made more quickly and
with greater by taking piece of cardboard or
heavy paper just the size of the ense and circular in shape
and punching in it two holes the size of lead pencil ap
proximately 5" apart The holes, however must be at
equal from the centre of the circle After the
is removed this card is held in place over the head
light so that hole directly above the other. The
light which through these holes will throw on the
wall screen two images OF the incandescent fament OF
lamp For focal adjustment No the lamp is moved
backward forward until one image uperposed direct
y the other For focal adjustment No the lamp is
until the Vshaped images point toward each other
and are 5" apart Focal adjustment No. is secured by
moving the lamp until the VS. point from each other
and about 80" apart.
These adjustments very simple-a movement of
less than quarter of any inch being sufficient it is also
lenses replaced and that the adjusting mechanism is
TIGHT So that the lamp bulbs cannot move or rattle The
adjustment the tilt gives the that beam of
light fall below the horizontal at distance of 100 it.
the is made at rs it, the amount of tilt should be
quarter of that specified in the list The simplest
make this test to the distance from the level
ground up the center of the headlights and then lay off
this distance on the wall making the spot with pencil
Having ascertained from the list the below this
that the light should fall this distance be laid off
wall and conspicuous spot located with heavy pen
Gil paint brush The lights then adjusted by bend
ing supporting brackets by MEANS until the
of the beam falls the latter spot The beams of
light however from the two headlights should not cross
should be nearly parallel possible. When this is
DONE the lenses be put in place. being taken to
that they right side and that in placing them
adjustment of the lamps has not been affected The
latter be ascertained readily by watching the light
spot the wall the glasses are replaced. -
It might be added that the position of the bulbs in
most headlights is adjusted by of at the
back by pulling the lamp socket in out.
Most of the approved headlight lenses tend to distr
butte the light well to the side of the road the
below the prescribed distance of 49, The
the distribution of light the easier will be to drive in
heavy fog since the powerful beam of light that is
cted directly ahead from MANY headlights or from head
lights improperly adjusted when reflected by the fog
back into the of the driver making driving
well nigh impossible This is specially true any rays
of light which projected higher than 4S" above the
road AS a consequence, when caught in fog many dr-
find it necessary to dim their headlights far
possible With distribution of light below the
48" line is secured with approved lenses properly
usted they would find it possible to drive with full light
and at far less risk
When driver makes a statement that the "glare"
from headlight from the top bottom the re-
of the lamp his audience may at conclude
understands little nothing about headlights
their adjustment for few moments experimenting with
the headlight will convince anyone that the glare may
from either the the bottom by simply
changing the position of the lamp Moreover this
position is equally important whether the headlight ense
has cost the driver $500 or $4,000
Let emphasize, for all, that the driver who
buys pair of approved headlight lenses and slaps
into his headlights without attempting any adjustment not
only breaks the law but risks his life and those his
passengers and of pedestrians and fellow autoists
furthermore wasting good light and running down his
duty to amarze himself with the adjustment
his headlights and that they are properly adjusted
for the type of lense that he has installed