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Nov. 8, 1938. M. SIEVEKING 2,135,851 TRAFFIC SIGNAL Filed Aug. 16, 1937 ' 2 Sheets-Sheet l l N.mwk E,$ E m ______ _' 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 2 Sheets-Sheet 2 5 ' 47 5t:- 45% I 60 53 k . _\\' \“v' Jo o ~—56 46 ' _ 54 52s 57 59 V66 MAR 7'//VU5 SIEVEK/NG - 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: ' ' ' 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 ' 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 ' . 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. ' ' 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.