US1438822A - Automatic railroad-crossing gate - Google Patents

Description

J. R; GOLDEN. AUTOMATIC RAILROAD CROSSING GATE APPLICATION FILED APR. 7, I919; 1 %3 2, Patented Dec. 12, 1922'...

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J. R. GOLDEN.

AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7, 1919.

Patented Dec.12,1922.

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' 1. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

AFPLlC ATl ON FILED APR. 7, 1919- Patented Dec. 12, 1922.

- J. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7, 1919- I Patented Dec. 12, 1922 N N R N Q 110/37; R; aoldflw,

"O 11 1/ I Attorney.

J. R. GOLDEN. AUTOMATIC RAILROAD CROSSING GATE.

APPLICATION FILED APR. 7. I9I9.

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AUTOMATIC RAILROAD CROSSING GATE. APPLICATION FILED APR-7.1919.

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Patented llfiec. 12, 139122.

rarest JOHN R. e-onnnn, or HAMMOND, INDIANA.

AUTOMATIC snrLnoan-onossrns GATE.

Application filed April 7, 1919. serial No. 288,027.

To all whom it may concern j X Be it known that 1, JOHN R. GOLDEN, a citizen of thelUnited States, and a resident of the city of Hammond, county 01" Lake, and State of Indiana, have inventedcert'ain new and useful Improvements in Automatic Railroad-Crossing Gates, of which the following is a specification. 1

My invention relates to improvements in automatic railroad crossing gates and has for its object the provision of a device which will automatically lower the gates at a railroad crossing upon the approachof a train thereto, and automatically raise the same after the train passed. Another object is the provision of a railroad crossing gate, electrically connected with a device, upon the passing over or which by a-train the gate will be lowered as. thetraiu approaches the crossing, and raised after the train has passed the crossing. 1

Other objects will appear hereinafter.

The invention consists in the combinations and arrangements of parts hereinafter de scribed and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this, specification, and in which, i

is a side elevation of the gate- Fig. 2,

mechanism,

operating tig. 3,

operating mechanism, j i

Fig. 4, is a rear elevation of the gateopcrating mechanism,

Fig; 5,. is a side elevation. of an exhaust valve, v j s Fig; 6, s a longitudinal sectionalview of the exhaust valve,

View of the circuit Fig. 12, isa sectional view of the valve taken on line 12-12 of Fig. 1,

Fig. 13, is a sectional view of the valve taken on line 13-13 of Fig.1, i

Fig. 1 1, is a sectional. view of Fig. 8 taken on line 14L14 of Fig. 1,

Fig. 1, is a top planviewofthedevice applied,

isa .front elevation o1 the gate- Fig. 15, is a top plan viewof the electrical device, with thehousing top removed,

Fig. 16,:is a side elevation'of one electrical removed, 1 j Fig.17, is a sectionta-ken on line 17-47 stin -Ad Fig. 18, is a sectional view taken on line devicewith the wallof the housing and parts 18--18 of Fig. 16, and

Fig. 19, is a sectional view taken on line .1919 of Fig. 16.

In the operation of the device, there isstationed, in close proximity to the. railroad crossinggate, an electrically operated mechanism which in turn operates an airpressure mechanism for raising r lowering the gate.

stationed along the railroad track, on both sidesof the gate, are electrical devices,which are adapted to break and close an electric circuit uponthe passing oi a train along the track at the point where these devicesare stationed.

The preferred form of construction, as illustrated in the draw ngs, comprisesfla housing19 enclosinga shaft 20 mounted on suitahle'bearings 20, and 20" secured to the base of housing 19, one end of saidshait projecting "through one side of said housing.

Secured tothe end of the shaft which pro jects through the housing 19 is an upright arm 21 adjacent to and projecting shove the rail 22, so that a wheel, in passing along said rail, will strike the arm 21 and osci late it. At the opposite endfofsaid shaft, enclosed within thehousing,is secured a perpendicw larly extending arm 23 having a horizontally projecting portion 24. Fivctally secured to lugs 25, projecting from the base oi? said housing, adjacent to and opposite the arm 23, is a four-blade knife switch, having thehlades 27 connectedv attheir upper end by an insulating memher 28 from the center of which upwardly projects aninsulating stud 29 which loosely engages in a slot 30 in the member 24L, so that upon the rocking of the member 24 in either direction'the blades 27 will be carried in thesame direction.

Pivotally mounted in the housing 19. in lugs arising from metallic members 31 32, 33, 34,'35 and 36", respectively,are con- "tact elements, also metallic, 31, 3 1, and 36, so positioned thatupon the rocking ot the blades 27 in'one direction, three of said hlade-s will come into contact with and he cnga, ed by elements 31, and 33, and

upon roc zing the hlades'27 in the other diarise from an insulating member 35'. which covers the base of. hous'ing'l9. Interposed between the tails 3 1 and the lug bearing a member which co-operates with the part from which the member 31 projects, are

positioned, coil springs .34. (lo-operating with the studs 32 are nuts 33. which. serve to retain the members 31 in their position on said studs 32. As will be described later on, the blades 27, 'being rockedto either side, are sometimes so. rocked with great force and rapidity. Uponbeing-rocked to either side, the blades, in engaging with the elements 31, 32 and 33, and 34, 35 and 36v would come into contact with these elements with great force. Were these elements rigidly fastened, in a short time, the blades rocking-against said elements would themselves, in a short time, become distorted or worn out, or would cause these elements to become distorted, loosened or worn out. Consequently, these elements are pivotally mounted. and have shock-absorbing-elements in the nature of spiral springs 34", whichserve to assure a connection of allthe blades with their corresponding elements upon a rocking motion, and which serve also to take up the 1 shock naturally incident to these blades coming into contact with their co-' operating elements, as will be readily understood. j

; Mounted on saidshaft 20, intermediatethe ends thereof, is ahorizontally extending bar 37; having flanges 38 and SS onl opposite ends. Projecting through a slot in each of said flanges are posts 39 and 39 secured to the insulating member which covers the base ofthe housing 19 and threaded at their upper end. These posts have a nut 40 which co-operates with their threaded end, and a washer 41', Interposed between saidfiange and said washer, on said posts 39 "and 39, are-spiral springs 42, of equal tension. It is thus seenthat upon pressing one end of the member 37 downwardly, the spiral ten sion at'the opposite end of this member will tend to restore the member 37 to its horizbntal position, Secured to each end of member 37,,adjacent the axis thereof, are metallic spring contact members 43, as clearly seen in Fig. 15. llclounted in the housing 19,011 opposite sides of the shaft and adjacentthe members 43, are magnetic coils an insulated member 45 being disposed on shaft 20 between the coils and bearing terminals 46. Terminal posts also arise from the members 31., 32, 33, 34, 35 and 36.

Stationed near the railroad crossing, mounted on a fran'ie 47, is a motor 48 having a pinion or gear wheel 49 secured to the outer end of its shaft. 7 The gear 49 meshes with the gear wheel 50, which is mounted on a shaft 51 supported in suitable bearings 52 on frame 47. The outer end of shaftbl bears a pinion or gear wheel 53, 'which meshes with a gear wheel 54 mounted on a shaft 55, supported in asuitable bearing 56.

i an eccentric: wheel 61 bearing the customary eccentric strap 62 and eccentric bar 63.

lligidly mounted to the base of the member which formsthe bearings 59, by means. ot upright bars 64, isa switch-board 64 on which is mounted a knife blade switch. each of the blades of said switch being mounted pivotally, intermediate their ends on lugs 65v which project from said switchboard. The upper ends of said knife blades are connected by an insulating ane'mber,

from. the center of which projects an insulated handle 66 having a slot 67 in which operates a bolt loosely connectingthe arm (33 to the member 66- The arm 68 projects irom. a transverse bar 69 to which is secured, at one end, an arm 70 to which is pivotally connected eccentric bar. 63. The bar 69. is mounted transversely at the upper end of the switch-board, in suitable bearingssecured to saidswitch-board. The arrange: ment of these parts is such that upon rotation of the wheel 60, the eccentric ,bar moved vertically up, and down.

The connection of the .eccentricbar with the knife blade switch is such that upon the upward motion of endear the lmver ends of the bladescontact withterminal; elements and serve to close a switch. Upon the dowi ward. movement of saidbar, the. contact of the lower'ends of'said blades is broken and a connection is formed between the upper ends of said blades and terminal elements, thereby closing a switch at the upper ends of said blades. Secured to the outer face of the eccentric wheel, or made integral there with, is a disc 71, so; positioned on said eccentric as to be concentric with the shaft 58. Eccentrically connected to said disc 71. at one end thereof, by a pivotal connection, is a bar 72 pivotally connected at its opposite end to an arn '73 projecting laterallyffron a valve as clearly shown iii.Fij1 ,,Q-.

The val re 74-, which is tapering or conical.

shaped, as clearly seen in Fig. 10, is provided with posts 7 5 and projecting from opposite ends. The post 7 5 which projects from the tapered end of the valve is threaded on its outer end. The valve seats in a housing 76, communicating with the interior of which is a feed pipe 7 7 and delivery pipes 78 and 79, as clearly shown 1n Figs. 3 and 11. An exhaust pipe 80 is connected with the feed pipe 77.

Secured to the shaft 51, opposite the end to which. wheel 50 is secured, is a disc 81 to which is eccentrically pivotally mounted a piston rod 82, secured to which is a piston 83 which is mounted in a cylinder of one of the usual types of air pumps. Feed pipe 77 communicates with the interior of this cylinder, and when the pump is in operation, supplies air under pressure to the valve housing and the valve, as will be readily understood. The valve '74 is retained in position in the housing 76 by means of a coil spring 84 positioned loosely on post 7 5 i and interposed between the housing 76 and a washer which is retained in position on the outer end of post 75 by a co-operating nut, as clearly shown in Fig. 3. As is ap parent. the tension of the coil spring is increased or diminished upon the turning of said nut either on or oil. Provided on the outer surface of valve 74 is an l -shaped groove 85, on opposite sides of which are openings 86 and 87 which pass through the valve.

Stationed in close proximity to the valve 74: and its co-operating parts is crossing gate 88, at the base of which is arranged suitable apparatus for raising and lowering said gate through the medium or compressed air. In this apparatus are two cylinders 89 and 89, one adapted to co-operate in lowering said gate and the other adapted to co-opcrate in raising the same. From the arrangement of the various elements thus tar described, it is apparent that upon the starting of" the motor 48, the wheel 50 will he caused to rotate and the piston 83 will he set in motion, forcing air through the feed pipe 77 and into the valve 74. The arrangement of the groove is such that when the stem 01" the L-shaped groove is aligned or registers with the mouth of the delivery pipe 78, the base or short portion of the L-shaped groove will be aligned or register with the mouth of the feed pipe 77 so that the air forced through the feed pipe 7'7 will pass into the valve housing, along the L-shaped groove on the valve and out of the valve easing into delivery pipe 78. which conducts the air to the cylinder 89 of the gate raising apparatus. This will result in lowering the gate and forcing the piston in cylinder 89 up. The air in the cylinder 80 will consequently be forced back through delivery pipe 79, but at the time the air being forced through delivery pipe 78, as

already described, the opening 8? registers .ing the air, which is forced back through the delivery pipe, free passage to escape. This operation takes place when the motor 48 is started while the eccentric rod 63 is in the position shown in Fig. 9. In other words, while the circuit is closed with the lower ends 01 the knife blades which. are pivoted to members 65, the air delivered from the air pump serves to lower the cross ing gate. While this operation is taring place, that is, while the air pump in operation, the gear wheel 50 is rotated and the segmental gear 5'7 is brought around to a position to mesh with the gear wheel 60, thereby rotating the same. This rotation of the wheel 60 causes the eccentric bar 63 to move downwardly, breaking the connection at the lower ends of the blades of the switch and closing the circuit by means of the upper end of the blades of the switch. t the same time, the bar 72 is moved backward, thereby moving the groove 85 from alignment with the mouth ot the delivery pipe 78, and consequently closing the valve at the mouth of the delivery pipe 78. The gear 57 is of suchlength as to rotate the gear (it) one-half of a revolution. -The valve 74; is then in such a position that the mouth of the feed pipe 77 is aligned or registers with the elongated portion of the l.-shaped groove, and the mouth of the delivery pipe 79 is also aligned orregisters with the same portion of this: groove. Upon the'starting of the motor T8, the air is similarly delivered through the feed pipe into the valve housing. and out through the pipe 79 into the cylinder 89 of the gate-raising apparatus. This will, force the piston in cylinder 89 up, with the consequent raising of the gate 88, at the same time forcing the piston of the cylintlerfifl. down, thereby forcing the air in cylinder 89 back through delivery pipe 78. The valve; in being turned as itl'lOv'C described, will cause the opening 86 in the valve to register with the mouth of the delivery pipe '7 9. At this position, registering with the opening 86 in the valve is an opening in the housing, thereby atl'ording free passage out of the valve housing to the air which is forced back through the delivery pipe 7 9. In the operation described above, the gear wheel makes another revolution actuating the gear wheel 60, thereby moving the valve '74 to its original position and also breaking the circuit formed by the upper end of the blades of the switch and gates 80 are normally in a raised position.

T o the exhaust pipe 80 is secured a valve housing 90, in which is seated a tapering conical shaped valve 91. Projecting from opposite ends of said valve are posts, one of which is threaded and adapted to receive a nut 92 and washer 92, as clearly seen in Figs. 5 and 6. The nut 92 being threaded on the valve, the latter is secured in the housing under the tension of the coil spring. To the opposite side of said valve is secured a discor drum 93 having two upwardly projecting shoulders 94 and .94. Positioned adjacent the lower end of housing 90, secured to exhaust pipe 80, is a collar 95 having an outwardly projecting arm 95 to which is secured, atone end, a Spiral spring 95", the opposite end of said spring being secured to a stud 95" eccentrically positioned on the outer face of drumv 93. On the housing is positioned a stop adapted to engage with shoulder 94. Secured to the shaft 55 is a collar 96 having a shoulder 97 a which is inclined at one end and which is adapted, upon the rotation'of said collar 96, to comeinto contact with a circuit breaker 113, to be described hereafter, which is mounted on and insulated from the bearing 56. Mounted on the shaft :55 is also a collar 99, having a shoulder 99 adapted, upon the rotation of the shaft 55, to engage with the shoulder 9i and thereby turn the valve 91 in the housing 90. Passing through the valve 90 is an open- .ing 101 adapted to register, upon the turnmg of said valve, with openings102 and 102, which communicate respectively with the outside air and the interior of exhaust pipe 80. It is thus seen, that upon rotation of the shaft 55, the valve 91 is turned so as to allow the air in the tube 80 to escape.

lVhen the collar 99 is rotated sufiiciently to disengage shoulder 99 from shoulder 94, the spring 95" will serve to restore the valve to its former or closed position.

Shoulder 95 serves as a stop by engaging with shoulder 94. when the spring95 re-. stores the valve to its closed position. The shoulder 99 is so positioned on the shaft 55 that upon rotation of the wheel 5 1, thee);- haust valve 91 is opened to allow the escape of the air remaining in the air pump cylinder and in the pipes 77 and80, to escape at the same time that valve 74 is operated by the eccentric rod 63. It is thus seen that the movements are all synchronous relatively to each other.

In Fig. 2 the shoulder 99' is shown as having just been freed from engagement with the shoulder 9a, and the valve is shown in a closed condition, having been restored to its closed or normal condition by the coil spring 95.

Secured to the bearing 56 is a make and break device 113 embodying a metal spring element 109 which is secured in position at one end by a threaded bolt 110 which passes through an insulating member 114 and contacts withthe terminal post, as shown in Fig. 7. The element 1.09 contacts, at its option of the wheel 54. the member 97 comes into contact with member 98 and thereby forces the member 11]. outwardly. This member 111 carries with it a member 109, and consequently breaks the connection which exists between the two terminal poles, as shown in Fig. 7. As isclearly seen in Fig. 1, the wire 103 connects with each of these terminal poles, each of said poles be- 111g. inter JOSGCl in the; wire 103 between the switch and the motor. Consequently, upon the pressing outward, of the member 109 from engagement or contact with the bolt which is opposite and corresponds to the bolt 110, the circuit'connecting the motor is broken.

As shown in Fi 15 the contacts 34;;in

the opposite housings 19 arev connected by a wire 103; the contacts 36 are connected by a wire 103"; the contacts31 are connected by a wire 103; and the contacts 33 are connected by a Wire 103 Theblades of the switches between the contacts'31" and I 3 1 in the respective housings are connected bya wire 104?; and the blades of the switches between the contactsl33 and 36 inthe respective housings are connected by a wire 10 1 The wire 103i is connected to-an outside terminalpost on thelower end of the switch-board (341 by a wire 103 and the wire 103 is connected to the opposite outside terminal of the switchboard 6-1- by a wire 103.

\Vire 103 is connected to an outside terminal post on the upper end of the switch board 641 by a wire 103 and the wire 103. is connected to the opposite outside terminal, post on the upper end of the switchboard 64 bya wire 103. The intermediate outside terminals of the switchboard 6 1 are connected by a wire 103 in which wire is interposed the motor 48 with its operative parts. The wires 10% and 10 i 'are connectedto a suitable source of energy such as a city supply by wires 103 and 104; respectively.

The magnets 44: are connected in series by wires 105, 106, 107, and 108, the wire being connected toan inner terminal on the an inner terminal on the, upper end of the incense lower endoi. theswitchboard 64- hy a wire 106 and the wire 1.05 being an inner terminal post on the lowerend of the switch-hoard 64; by a wire 105?. The wire 10'? is connected to an inner terminal on the upper end of the switch-hoardt l bywire 107, and the wire 108 is connected to switch-boarded by wire 108. A battery 1.15 is connected to the two-inner terminals intermediate the ends of 64- by wires 105 and 106 When the arm 21. in the switch-boxshown to the right'in Fig. 15 0f the drawings is oscillated in an anti-clocl. wise direction hy'a nov'ing train, the switch blades in the switch-hoard S t-are in engagement with the terminals on the lower'end oil? such switci hoard. The movement of lishes a circuit beginning at the supply wire 103 and extendingthrough wire 104", to the innermost blade of the switch 24, through contact 34:,wires 103, mil wire 103 and motor, 103 lOSHcontactfiGf, wire 10 1 and out through wire 10%; Simultaneously withthe establishment of themotor circuit, a circuit is established through the appropriate magnets 44 as follows,--;-from the battery 115 throughwires 106*; 1062 106, contact 35" to magnets; returning through 105, 105 105*;tobattry115. In this manner the bar 37 is held down against the tension of the springstLQ thereby securing the switch in the housing- 19 in such aposition as to maintain the closed circuits already mentioned. "The motor haviiig been set in operationthrough this method, will continue to operate until the member 9? comes into engagement with the members 111 and 98, when the circuit connected with said motor will be broken.v This operation takes 'ei'r ect before the gear 57 comes into on gate in-a lowered position, with the switch a which is mounted on the trains eifcloseifl through the upper ends ofthe kniitehlades. l i 'hen the arm 21 in the opposite housing 19 is oscillated in an anti-clockwise direction the motor circuit is established as follows oeginning at wire 103, 'througlrltl lfi to switch, to contact 31, through103 108 103 103, 103 contact 323% 104: and out at 10 1 and the magnet circuit is established through wires 105" 107 107 contact 32',to

connected to oscillated, therehy I througlhthe motor 48.

the switch-board being energized, thls arm will he retained arm 21 estalogoing 111,

ing from the spirit of.thednventioni tor for operating magnets, back through wires 108 108 106", to battery 115.

'llhe motor havingheen set n operation, the machinery Wlll co-operate in the previous operation, with the result "that the gate 88 Will he raisedand the different elements will he restored'to their norin?! position which is shown in F 2L it is thusseen that upon the passing of a train along the rail 22', the arm 21-will be closing the circuit The magnetic coils in its downwardly moved position until the circuit throughthe magnetic coils is broken by means of the cooperating machinery which is mounted on i'raine 4. seen that the train in passing along the rail and strikingthe arm 21, will lower the The next electrical device with which the train comes into contact-is stationed at the lit is also opposite sideoi the gate, and thearm 21a is oscillated in an opposite direction relatively to theco-operating parts, which are secured in the hous ng 19;. Th s w ll result in again closing thecircuit and operating the machinery to raise the gate as already "described; It is thus S3611 that there is provided in this device, automatio'means for lowering a gate-at a rallroad'crossing upon the approach of aftraiin and automatic means for raising the gate after the tram has passed the crossing.

It is also clear that this device is ada pted to raise andlower the gate described; ir-

respective of which direction the train is so that the device may heused on a :louhle-track railroad as well as on a-singletrack railroad. oi course th'e electricaldevices would have to be stationed at o jposite sides ottlle "railroad track at pointson opposite sides of the gataas will be readily understood.

I While I have illustratedand dcscrihedtho preferred form of construction i'or carrying my invention into etliect, this iscapable of variation and modification without depart- T L r I ,c 7 therefore do not IVlSll to be limited to the precise details of construction set :tort'lnhiit desire to avail myself of such Variations andmodifications as come within the scope 'otthe appended claims,

Having described my invention wilt-at I claim asnew and desire to secnrehy Letters Patent isr 1, A. railroad crossing gate operated by compressed. air mechanism; anelectric mo D said compressed" air mechanism; means spaced. along tl'lGTftllroad track for automatically setting said In a douhle-track railroad motor in operation; gears operable by said I motor; a cannon one of said gears for auto as described. a j 2, In combinatlon'wlth a rallro'ad crossmatically stopping said motor, s1 lostantially ing gate adapted to be lowered and raised by compressed air mechanlsm, an electrlc .motor adaptedto operate said compressed air mechanism; electrical devices stationed along the l'QlllOdCl'tlfiClCOll opposite sldes of said gate;an electric circuit connectingv each of sald elements with said motor;

7 gears operable by said motor; a cam on one of said gears for stopping said motor; and a. switchoperable by a segment on one of said gears for partly re-establishing said circuits. V

3. Incombination with a railroad crossing', gate adapted to be lowered and raised by compressed air mechanism, an electric motor adapted to operate said compressed air mechanism; electrical devices stationed along the railroad track on opposite sides of .vices adapted to be closed by said rockerv said gate;an electric circuit connecting each of saiddevices with said motor; a rocker arm mounted in each of said devices; resilient contacts connected to each of said dearm; and gears on; said motor for'automatically breaking said circuit, substantially as described. V I I,

l 4. Incombinationwith a railroadfcrossinggate, adapted to be lowered and raised by compressed air mechanism, an electric motor adapted to operate said com-pressed air. mechanism electrical devices v stationed along the railroad track on opposite sides of said gate; an electric circuit connecting said devices with said motor; contacts connected .on each of said devices for closing said circuit; an upwardly projecting arm adjacent the rail of said railroad track and adapted, upon the passing of a train over said rail at said point, to operate said circuit contacts;

and; gears on said motor for-automatically breaking said circuit, substantially as .de-

' scribed.

5; In combination with'a railroadcrossinggate adapted to be lowered and raised by compressed air mechanism, an electric motor adapted to operate said compressed air mechanism; electrical devices stationed along the railroad track on opposite sides of said gate, comprising a knife bladeswitch and magnets; an ,electriclcircuit connecting said switch and said motor; a rocker arm in each of said electrical devices adaptedto close the switches therein; a transverse bar secured to said rocker arm and. adapted to engage said magnets to hold. said switch closed; and gears on said motor adapted to release said rocker arm and break said circuits v g 6. In combinationv with a railroadcross- 'ing gate adapted tobe lowered and raised I by compressed air mechanism, an electric motor adapted to operate said compressed air mechanism; an electric'circuit connecting with said motor; a switch interposed in said circmt: at points on oppositesides of said gate; an eccentric-gear operable by said motor for opening and closing said switch; and a camoperable-by said motor for breaking said circuit, substantially as described.

7. In combination with a railroad crossing gate adapted to be lowered and raised by compressed air mechanism, an electric motor adapted to operate said compressed air mechanism; an electric circuit connecting-withsaid motor; a switch interposed in said circuit [at pointson opposite sides of said gate; an arm connected with said switch and'adapted, upon the passing of a train along the rail at said point, to close said switch; a bar on said armand movable therewith means for retaining said switch in closed position; and a cam operable by said motor for breakingsaid circuit, substantially as described. 7

.8. In combination with a railroad crossing gate adapted to be lowered and raised by compressed air mechanism, an electric motor adapted to. operate said compressed air mechanism; an electric circuit connecting with said motor; a switch interposed in said clrcuit at POHltS' on opposite sides of said gate; a rocker arm connected wlth said switch, and adapted, upon the passingqof a train along the railatsaid point, to close said switch; a bar secured to said'arm and movable therewith; magnets adapted, when energized, to retain said bar in closed position; and a camoperable by said motor for breaking said circuit, substantially as described. I

9. In combination with a railroad cross inggate adapted tobe lowered and raised by compressed air mechanism,-anelectric motor; means connected with said motor and adapted, upon the operatlon of said 'motor, to raise and lower said gate; an electric circuit connecting with saidmotor; a switch interposed in said circuit at points on opposite sides ofsaid gate; a rocker arm connected with said switch and adapted,

:upon the passing of a train along the rail at said point to close said switch; a bar secured to said arm and movable therewith;

magnets engaging said bar for retaining said switch in. closed'position; and a cam valve and a switch,- substantially as. de-

scribed. v a v v y 1 n o bmat nrwith-a railr ademss 1 ,aeasee' ing gate adapted'to be lowered and raised motor; gears connected. with said motor adapted, in one position, to raise said gate and adapted, in another position, to lower said gate; and gears on said motor for auto inatically regulating said gate raising means for alternatel lowerln and raisin said gate, substantially as descrlbed. i

12. In combination with a railroad cross ing gate adapted to be lowered and raised by compressed air mechanism, an electric motor; means connected with said motor for alternately lowering and raising said gate; an electric circuit connecting with said motor; a switch interposed in said circuit; a valve regulating the flow of air to said compressed air mechanism; and gears operable by said motor for automatically and synchronously opening and closing said valve and for operating said switch, substantlally as described. i

13. In combination with a railroad cross ing gate adapted to be lowered and raised by compressed air mechanis man electric motor; means connected with said motor for alternately lowering and raising said gate;

an electric circuit connecting with said 1110 tor; a switch interposed in said circuit; a valve regulating the flow of air to said compressed air mechanism; a feed pipe communicating' with said valve;-an exhaust valve communicating with said feed pipe; and eccentric gears on said motor for automatically operating said valves and said switch synchronously, substantially as described;

In testimony whereofl have signed my name to this specification in the presence of twosubscribing witnesses. JOHN B. GOLDEN, Witnesses: JOSHUA R. H. Po'r'rs,

HELEN F. LILLIs.

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