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Патент USA US2137161

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Nov. 15, 1938..
Filed June 12, 195@
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Patented Nov. 15, 1938
Aubrey B. Grantham, Douglaston, N. Y.
Application June 12, 1936, serial No. 84,930
2 Claims( (01.177-337)
This invention relates to an improvement in
traffic signals, and more particularly to auto
matic signals such as are ordinarily used for di
recting vehicular traffic, particularly at inter
5 sections of streets or roads.
The object of the invention is to provide> in
such automatic traflic signals, deñnite indica
tions of the direction of Vtraffic movement by the
'shape and position of the illumination- thereof,
l0 in addition to the color of the lights, so that the
signals will be clearly understood by motorists,
as well as by pedestrians, even though such per
sons may have lost their color sense and become
what is usually referred to as “color blind".
In carrying out this object, the signal lights,
which may be controlled in the usual 4way by
automatic equipment, are of distinct shapes and
positions and, in the preferred embodiment of
Fig. B is a side elevation of a similar form of
the invention;
Fig. 9 is a verticalsectional view through the
horizontal arm thereof, taken on the line 9-9 of
Fig. 8; and
F“Fig v10 is a horizontal sectional view through
the vertical arm thereof, taken on the line
lll-_:Iû'of Fig. 8;
In the embodiment of this invention illus
trated in Figs` 1 to 6 of the drawings, the traffic 10
signal comprises a casing designated generally by
the numeral I, which is substantially L-shape
when 'viewed from any side, top, or bottom, so as
to provide a‘pair of horizontal arms 2, which ex
tend laterally in different directions from the
upper end of a vertical arm 3. Each of the hori
zontal arms 2 has Windows 4, in opposite sides
thereof, when the signal is intended to control
the invention, this presents a horizontal bar of
20 red light and a vertical bar of green light to
indicate, respectively, closed and clear or open
traffic moving in opposite directions where a
traffic lanes, which respective bars of red and
signal is used on each corner of the intersection
as has been customary with some traffic signals
green light are arranged facing in the same di
rection and are designed to be energized or il
25 luminated alternately for indicating, respective
1y, “stop” and “go”, according to which of the
lights is illuminated. The arrangement of the
lights in horizontal and vertical relations defl
nitely indicates both to motorists and pedestrians
30 the direction of movement of the trafñc along
the respective lanes, even though such persons
may have lost their color sense.
The signal has provision for simultaneously
controlling intersecting trailìc lanes, by present
35 ing controlling bars of light in different direc
tions at adjacent, and if desired, also opposite
sides thereof, and alternating the signals with
out bodily movement of the signal device.
The accompanying drawings illustrate dif
40 ferent embodiments of the invention, in which1--Fig. l is a perspective View, showing one form
of signal mounted on a cross Wire, which is use
ful at the middle of an intersection;
Fig. 2 is a similar view showing the mounting
45 of a signal on a post;
Fig. 3 is an isometric View of this form of
Fig. 4 is a top plan view thereof;
Fig. 5 is a vertical sectional view through one
50 of the horizontal arms, taken on the line 5_5,
-of Fig. 3;
Fig. 6 is a horizontal sectional view of the
vertical arm, taken on the line 6_6, of Fig. 3;
Fig. 7 is a side elevation, showing a slightly
55 diiîerent illumination for the signal;
single signal is used at the street intersection,
but there may be only one window 4, when the
Illuminating lamps 5 are arranged
in the arms 2 for illuminating the windows 4.
The Windows 4 are preferably provided with glass
or other transparency colored red, in order to
indicate, when illuminated, that the trañ‘ic should
stop in that direction.
The Vertical arm 3 is shown as provided with 30
four windows 6, one on each side thereof, which
should also be formed by glass or other trans
parent material, and preferably are colored green
to indicate the direction of movement of trafiic.
Lamps 'l are shown as arranged within the verti
cal arm 3 for illuminating the windows ä. Less
than four windows 6 may be used, if desired, as
for instance, one, when the signal is used on each
corner of an intersection.
It will be understood that the automatic trahie 40
signal embodying this invention is not bodily
movable to different signalling positions, but it
is adapted to present different bars of light in
the same direction, as green and red alternately,
and also alternating with other lights on adia
cent sides, Without bodily movement of the signal.
The forms of the invention shown here present
a novel and distinctive form of traffic signal which
is shown as approximately L-shape when viewed
from any side, although it is obvious that it may .
be made square as indicated at 8 in Fig. 4,
if desired, or of triangular or other shape in
In the form of the invention shown in Fig. 7,
horizontal and vertical lighting tubes 9 and IU 55
are arranged on the respective arms of the sig
nal, which tubes may be gaseous discharge tubes
of the character of neon tubes, and used in place
of the lighted windows described above.
A more complete signal of this character is
shown in Figs. 8 to 10 of the drawings, in which
a casing 2| has horizontal and vertical arms 22
and 23 extending therefrom, which arms are not
of box type, but rather are of skeleton frame type
as shown in the sectional views, Figs. 9 and l0.
The horizontal arm 22 has a vertical web 24 with
a cover 25 extending over the arm, including the
web 24 and secured thereto, while the end of
tinctly contrasting shape, such as horizontal and
vertical areas, in the form of bars of light ar
ranged to be viewed alternately from one point 10
of view at a side of the signal, which contrast
ing areas or bars of light are adapted to be
alternately illuminated, as, for instance, by the '
the arm is provided with a wall 26.
Bars of light are provided at opposite sides of
the arms 22, by means of a gaseous discharge
usual control box designated generally by the
numeral Il, in Fig. 1, in order to indicate by
tube 2l, which extends lengthwise on opposite
sides of the web 24, and through said web ad
jacent the end wall 26, the inner ends of the
tube 2l having the usual electrodes therein at
the casing 2l for creating an electrical discharge
their color sense.
in the tube.
As shown in Fig. 10, the vertical arm 23 is of
skeleton frame form as indicated at 28, between
tc ci the webs of which are arranged gaseous discharge
tubes of the neon type designated generally by
the numeral 29 for presenting bars of light in
diiîerent directions alternately, the light on oppo
site sides of the signal arm being presented simul
will present horizontal bar of red light to the
intersecting street or road simultaneously with
the energizing of the tube 29 shown in full lines
in Fig. 8 to permit traiiìc to move in the direc
tion facing the signal in said ligure.
The important feature of the invention is the
provision of a plurality of signal areas of dis
the shape of the bar of light, as Well as by the
color of the illumination, the direction of move
ment of trail‘ic, even to persons who have lost
The signal may be supported in any well-known 20
or customary manner as, for instance, by a cable
I2, shown in Fig. 1, which extends transversely
of a street intersection, or by a bracket arm I3,
supported by a post i4, as shown in Fig. 2, which
may be used at the corner of the intersection.
I claim:
l. A traffic signal comprising a structure hav
ing a plurality of elongated signal arms rigidly
connected together at one end and extending
taneously, but alternately at right angles thereto.
respectively approximately in horizontal direc 30
The tubes 29 are arranged in cross relation, and
each of the tubes extends through the skeleton
frame structure 28, near the lower end of the
arm 23, and have their upper ends joined to the
tions therefrom, With a separate signal arm ex
tending substantially in a vertical direction from
said connected ends, each of said signal arms hav
ing an upright signal face for presenting differ
box structure 2i, being provided with electrodes
ent light signals respectively when illuminated
at said upper ends.
The gas in the tubes 21 and 29 may be colored
in the usual way to present, respectively, red and
green light effects when said tubes are energized.
40 The red light tube 2l will be energized simul
taneously with the green light tube 29, at right
angles thereto, so as to control movement of
traíiic in different directions at an intersection
without movement of the signal as a whole and
45 without any manual control thereof, being con
trolled entirely by the usual automatic equip
It will be understood that a horizontal arm
corresponding with the arm 22 extends at right
angles thereto, so as to stop the movement of
trañic on the street or road intersecting that
which the arm 22 faces and which other arm
2. A traiiic signal comprising a structure hav
ing a plurality of elongated signal arms rigidly
connected together at one end and extending
respectively approximately in horizontal direc- l
tions therefrom substantially at right angles to
each other with a separate signal arm extending
substantially in a vertical direction therefrom,
each of said signal arms having an upright sig
nal face for presenting different light signals
respectively when illuminated alternately, the
horizontal arms alternately presenting “stop”
signals simultaneously on opposite faces thereof
and the vertical arm presenting “go” signals on
four faces thereof alternately with the corre
sponding “stop” signals.
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