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Патент USA US2135851

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Nov. 8, 1938.
M. SIEVEKING
2,135,851
TRAFFIC SIGNAL
Filed Aug. 16, 1937 '
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MAR vT/NUS 5/5 VEK/NG
INVENTOR
A TTORNEY
NOV. 8, 1938.
M, slEVEK‘NG
2,135,851
TRAFFIC SIGNAL
Filed Aug. 16, 1937
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MAR 7'//VU5 SIEVEK/NG
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INVENTOR.
ATTORNEY
Patented Nov. 8,‘ 1938
2,135,851
1
UNITED STATES PATENT OFFICE
2,185,851
TRAFFIC SIGNAL
Martinus Sicveking, New York, N. Y.
Application August 16, 1937, Serial N0. 159,416
2 Claims. (Cl. 116-63)
This invention relates to a tra?ic signal for used at a street intersection for directing tra?ic
directing traiiic at street intersections. This ap
plication is a continuation in part of my applica
tion Serial No. 126,767, ?led February 20, 1937.
An object of this invention is to provide a
from four sides.
tra?ic signal especially designed for separately
directing vehicular and pedestrian tra?ic, by di
intermittently operating the tra?‘ic signal motor
by remote control.
recting the vehicular tra?ic to stop while the
pedestrian traiiic is moving and vice versa, the
10 change in signals being gradual and progressively
visible. The pedestrian tra?ic hasan exclusive
period for crossing while all vehicular trailic stops
from all directions. The vehicular tra?‘ic has an
exclusive period for crossing while all pedestrian
16 tra?ic stops from all directions.
Another object of this invention is to provide a
tra?ic signal comprising three variously colored
signals designating instructions to traffic, one of
the signals, colored orange being exclusively used
20 by the pedestrian traffic and is visible while the
usual red and green signals for vehicle tra?ic are
hidden.
Another object of this invention is to provide a
traf?c signal for directing tra?ic at street inter
comprising three variously colored,
slowly rotating signalling ?elds successively and
intermittently brought to view.
25 sections
Another object of this invention is to provide a
tra?ic signal device for directing traffic at street
30 intersections comprising a rotatably mounted
transparent cylindrical dial provided around its
entire circumference with successive transparent
?elds of three variously colored signals designat
ing instructions to tra?ic and having a fixed
35 cylindrical outer shell with opening means in
alinement with the respective ?elds of said rotat
able dial, the said signal device also having a ?xed
electric bulb centrally mounted in said cylindrical
dial member and having means for successively
40 and intermittently actuating the said cylindrical
dial by remote control.
With the above and other objects in view, the
invention will be hereinafter more particularly
described in connection with the accompanying
45 drawings and pointed out in the claims which
form part of this speci?cation.
Reference will now be had to the drawings,
wherein like numerals of reference designate cor
responding parts throughout the several views, in
50
which:
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'
'
Figure 4 is a fragmentary exterior view of the
tra?ic signal, the windows not being shown.
Figure 5 is a plan view of a timing device for
Figure 6 shows a wiring diagram of the traf?c
signal.
In the illustrated embodiment of the invention, 10
the numeral l0 indicates a traf?c signal compris
ing an outer shell ll having a removable cover l2
at its upper end and a ?ange l3 at its lower end.
The shell I i may be suitably mounted on a pedes
tal l4 having a platform IS. The shell II has 15
four openings I6 diametrically positioned at its
upper elevation. The openings iii are de?ned
by four solid wall sections of substantially the
same circumferential extent as the openings.
concentrically mounted inside the shell H are 20
a plurality of legs I‘! fastened at their lower ends
to the platform l5 and providing between them
ample space for the entrance of the hands of an
attendant. A stationary dished member l8 hav
ing an annular rim I9 is fastened to the legs and
has a ball race 20 and a plurality of balls 2| form
ing an antifriction thrust bearing.
Another
dished member l8’ of the same dimensions as the
member I 8 and having an annular rim l9’ and a
ball race 20’ has been mounted on the balls 2|.
A hollow cylindrical transparent dial member 22
preferably made of glass has been mounted inside
the annular rim l 9' of the dished member l8’ and
may be secured thereto as by screws 23.‘ The
upper end of the transparent member 22 is ,‘open. 35
In order to gradually and intermittently rotate
the transparent member 22 I have secured a tube
or hollow shaft 31 having a threaded upper sur
face 24 to the central portion of the dished mem
ber l8’ by means of upper and lower threaded 40
nuts 25» and 26. The tube 31 is in axial aline
ment with the axis of the transparent dial
member 22 and extends downwardly through and
has its lower end rotatably mounted in a guide
member 55. The tube 31 and the dial 22 are 45
integral. On the tube 3'! I have mounted a gear
21. The gear 21 is secured to the tube 31 by a
collar 28 and a screw 29.
I have mounted two cam disks 35 and 36 in
superposed relation and preferably made of plas
Figure 1 is a vertical cross-sectional view of the I tic insulation material.
The disks 35 and 36 are
secured to a bushing 38 forming an upper exten
Figure 2 is a cross-sectional view taken as on sion of the gear 21. The disks 35 and 36 are thus
line 2--2 in Figure 1.
v integrally secured to the gear 21 and are jointly
55
Figure 3 is a diagrammatic view of signal ?elds secured to the rotary tube 31 by the screw 29 in 55
tra?ic signal showing signal openings.
2,135,851
2
electric motor 41 preferably like the motor 33
shown in the trafiic signal It. A two-blade tim
ing contact member 33 has been secured to the
upright shaft 49 of the motor and is preferably
made of insulating material. The contact blades
53 and 54 may be positioned in diametrically op
posed relation as shown in full lines in Figure 5.
The electric motor 41 operates continuously and
the collar 28. The disks 3! and 35 are spaced
apart by a washer 35.
The upper disk 35 has on its outer peripheral
surface eight sloping indentations 44 while the
lower disk has only four sloping indentations 48.
The indentations 44 and 48 form cam teeth.
A supporting rod 33 has been suitably fixed in
an upright position to the base [I and has a
bushing 50 adiustably mounted thereon by a
10 screw 5|. Secured to the bushing to in a hori
causes the variable timing gear 45 to rotate con
10
tinuously.
A wiping contact member 50 has been mounted
to contact with the timing contact member 63.
The contact member 58 has one fixed blade I‘!
and one long and ?exible blade 58 which are in
termittently wiped by the rotary contact blades 15
53 and 54 and are moved radially twice for each
revolution of the rotary blades. The two blades
of the contact member 53 have been electrically
connected by suitable wiring 55 with the traillc
signal motor 30.
The two blades 51 and 53 are normally spaced
apart from each other at their free ends. While
the timing contact member 80 rotates, the blades
zontal position is a long ?exible blade 52 and a
short rigid blade 82 which are normally spaced
apart from each other. The blade 52 presses
lightly against the cam teeth. The blades 52 and
15 62 are insulated from each other.
When the disk 35 ‘rotates, the cam teeth 44
successively force the blade 52 into contact with
the blade 62 thereby closing the electric circuit
and energizing the tra?lc signal motor 30. The
20 electric motor 30 has been mounted on the plat
form It and has a built-in reduction gear 3| and
a shaft 32 extending vertically. At the upper end
of the shaft 32 I have mounted a gear 34 in
mesh with gear 21.
53 and 54'successively come into forcible contact
with the blade 58 and press it against the blade
51, thereby closing the electric circuit and ener
gizing the trai?c signal motor 33 for a few sec
onds for every contact.
As shown in the wiring diagram in Figure 6.
the control circuit includes main feed wires 35
connected to the timing gear motor 41. The
motor 41 rotates at constant slow speed and
causes rotation of the timing contact member
v
This invention provides an additional signal
to the usual red and green signals. The addi
tional signal is preferably colored orange and
placed between the green and red signals, the
said orange signal being exclusively for use by
30
pedestrian traffic.
As shown in Figure 3, the circumference of the
dial 22 is divided into eight equal divisions or
signal fields 40. These divisions are indicated by
three different transparent colors placed in suc
35 cession and in contiguous relation on the trans
parent dial as follows in numerical relation:
orange 4|; red 42; orange 4i; green 43;
orange 4|; red 42; orange 4|; green 43.
The traf?c signal ill is to be used at a street
40 intersection and must separately signal vehicle
60 mounted on a reduction gear 51.
come into contact and close the circuit a and
energize and cause rotation of the traffic signal
motor 30. The duration of contact of the said
blades and the closing of the circuit a lasts only 40
a few seconds. When the motor 3! begins to
rotate, the superposed cam disks 35 and 30
mounted on the rotary tube 31 begin to rotate.
One of the cam disks, in alinement with the long
blade 52, causes the blades 52 and 32 to contact
and closes the circuit b leading to the motor
30 and causing the tra?lc light dial 22 to rotate.
The dial 22 continues to rotate until the blade
52 falls into the next cam tooth 44 causing the
circuit b to open and stopping the traffic signal
motor 30.
and pedestrian tra?ic coming from four ‘direc
_tions.
Figure 4 shows a signal ?eld which is to be
colored orange. There are four orange signal
?elds diametrically'opposed and indicating simul
taneously from four directions through the four
openings IS in the shell ll. These orange signals
indicate that the pedestrian tra?lc has the right
of way exclusively from four directions, and dur
50 ing that period all vehicular traffic is automatic
ally stopped, because the green and red signal
fields are not visible, being hidden by the four
solid walls defining the openings I6.
The constantly rotating timing contact mem
ber 50 makes and breaks the circuit a. The
closing of the circuit a lasts only a few seconds.
It is to be noted that the change from one signal
55 to another is gradual and the signal is progres
It will thus be seen that circuit a is closed first
sively visible while changing as contrasted with
the usual tra?ic signal wherein the changes take
place suddenly and without giving the pedestrian
60
an exclusive period for crossing at intersections.
During the rotation of the colored dial sec
tions, all the approaching pedestrian and vehicle
tra?lc mustcome to a stop. It is only when the
rotation comes to a standstill that the tra?lc can
be resumed.
When the
timing contact member 55 comes into sliding
contact with the blade 55, the blades 51 and 53
_
and circuit b is closed a few seconds later. When
circuit 12 closes, the circuit a is automatically cut
out therefore the motors 30 and 41 rotate and
act independently and even if the motors 30 and
41 are placed at a great distance apart and there
is a loss or ?uctuation of the current, it cannot
influence the motor 30 because said motor will
always rotate until the blade 52 slides into the
next cam tooth 44.
p
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Therefore, it will be seen that the current of
It is obvious that the reduction gear 3| may be
varied so as to regulate the periods of movement the main feed line 66 actuating the motor 41
and stoppage of tra?ic. This traffic signal avoids > after circuit a is cut out 'is transferred automati
the danger of the pedestrian being injured by
vehicular traffic.
70
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.
I have provided a variable timing gear 45 for
electrically operating my tra?ic signal ill by
remote control. The timing gear serves to cause
intermittent rotation of the dial member 22 in the
traffic signal. The timing gear 45 preferably com
75 prises a base 48 on which has been mounted an
cally to the motor 30 which is generally located
at a great distancefrom the location of the tim
ing gear 45.
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70
It is to be noted that the positions of the two
blades 53 and 54 of the timing contact member
60 may be varied. These blades may be posi
tioned in diametrically opposed relation, as
shown. In this position. the stoppage periods of 75
3
2,185,851
3
all the tra?ic signals are equally timed and each
signal ?eld will be moved in the same number of
seconds.
>
One 01' the blades of the timing contact mem
ber 60 may however be positioned in angular rela
tion to the other blade, as shown in dot-and-dash
lines, so as to vary the time of exposure of the
variously colored signal ?elds.
As shown in Figure 1, I may adjust the bushing
10 50 so that the blades 52 and 62 are in line with
the cam disk 36. In this position there will be
_ only four periodic movements of the traffic signal
dial for one rotation of the dial 22, the orange
signal not having any stoppage period. The time
16 of exposure of each signal can be regulated with
absolutely accurate timing.
It is to be understood that the motors 30 and
41 are preferably of the same capacity and that
the motor 41 rotates at constant speed while the
20 motor 30 rotates intermittently. Due to the
comparatively slow motion of the rotary signal
?elds, it is possible to very accurately control the
intermittent starting and stopping of the tra?ic
signal motor 30 and to accurately stop the said
25 respective trafiic signal ?elds in absolute juxta
position with relation to the windows IS in the
tra?lc signal casing II.
when green begins to disappear, orange becomes
slowly visible, the two signal lights being visible
simultaneously in decreasing‘ and increasing ex
tent while the dial is in motion. The pedestrian
thus knows at a glance when it is safe to start
to cross.
'
'
It will thus be seen that I have provided a very
simpli?ed tra?lc signal having only two members
in motion.
I claim:
,
‘
10
‘
1. In an electric motor driven tra?ic signal
comprising a casing having four open windows, a
transparent dial of circular cross-section rota
tably mounted in said casing and comprising
eight contiguous transparent signal ?elds, a‘ 15
dished member having a downwardly extending
hollow shaft secured thereto, said dial being
secured in said dished member, a supporting base
having a central aperture for downward passage
therethrough and free rotation of said hollow 20
shaft, a ball bearing supported by said base and
supporting said dished member and said dial, a
gear secured to the upper end of said hollow
shaft, a stationary tube passing vertically through
said hollow shaft, an electric light mounted cen 25
trally of said dial and being supported on said
stationary tube, driving means in said casing hav
ing a reduction gear carrying a vertically rota
table shaft, said shaft having a gear mounted
30 pedestrian by the orange colored signals ll, that thereon, said driving means gear being engageably 30
the invention may be practised with the usual mounted with said hollow shaft gear, and means
red and green signals, the pedestrian crossing on ' to operate said driving means intermittently.
the green signals only, as with existing traffic
2. In an electric motor driven tra?'lc signal
It is to be understood that while my tra?ic
signal l0 provides an exclusive period for the
lights. The orange colored signals serve as a
35 caution between the red and green signals and
vice versa, therefore the driver of a vehicle has
to stop when the orange comes into view. The
drivers or vehicles must not start until the orange
signal has entirely disappeared and green comes
40 to a standstill which will take approximately ten
seconds.
.
A constantly lighted electric bulb 63 has been
fastened at the upper end of the ?xed inner tube
64 and has electric wiring 65 running down
wardly therethrcugh from said bulb to any suit
able switch (not shown). The tube 64 is fastened
at its lower end to the platform IS. The light is
seen from four sides.
It is to be noted that the dial 22 comes to a
stop at each change of color and that the blades
53 and 54 may be adjusted sothat the dial will
remain stationary for about one minute for green
or red and about twenty seconds for the orange
comprisinga casing having four open windows,
a transparent dial of circular cross-section rotat
contiguous transparent signal ?elds, a dished
member having a downwardly extending hollow
shaft secured thereto, said dial being secured in
said dished member, a supporting base having a 40
central aperture for downward passage there
through and free rotation of said hollow shaft, a
ball bearing supported by said base and support
ing said dished member and vsaid dial, a gear
secured to said hollow shaft,'a stationary tube
passing vertically through said hollow shaft, an
electric light mounted centrally of said dial and
being supported on said stationary tube, driv
ing means in said casing having a vertically ro
tatable shaft and a gear mounted thereon, said
driving means gear being engageably mounted
with said hollow shaft gear, and means to operate
said driving means intermittently.
color. The contrasting adioining bands of light
serve an uninterrupted warning, for example,
35
ably mounted in said casing and comprising eight
MARTINUS SIEVEKING.
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