US1454673A - Trolley guard - Google Patents

Description

May 8, 1923.

M. FIRL TROLLEY GUARD Filed July 15. 1922 4 Sheets-Sheet 1 May 8, 1923.

M. FIRE.

TROLLEY GUARD Filed July 15, 1922 4 Sheets-Sheet 2 Jillian f "a"? :5,

M. FRL Y TROLLEY GUARD May 8, 1923.

Filed July 15, 1922 4 Sheets-Sheet 5 mum QM 7 mm Mn Q May 8, 1923.

M. FlRL TROLLEY GUARD Filed July 15, 1922 4 Sheets-Sheet, 4

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Patented May 8, 1923,

hi i T @511 S I1 MILTON FIRL, OF MEYERSDALE, PENNSYLVANIA.

TROLLEY GUARD.

Application filed July 15, 1922. Serial No. 575,289.

' T 0 (1H 'urlzoa'n'izf may concern:

Be it known that l, MILTON Finn, .acitizen of the United States of America, and resident of Meyersdale, county of Somerset, State of Pennsylvania, have invented certain new and useful Improvements in Trolley Guards, of which the following is a specification. i

This invention relates to certain improvements in trolley guards; and the nature and objects of the invention will be readily understood and appreciated by those skilled in the arts involved in the light of the following explanation and detailed description of the accompanying drawings illustrating what I at presentvconsider to be the preferred embodiments or mechanical expressions of the invention from among various other forms, arrangements, combinations and constructions of which the invention is capable within the spirit and scope thereof.

The inventionis directed to electrical current collectors of the trolley type, and has for one of its objects the provision of mechanism automatically actuated and controlled by the movements of such a collector in operation, to prevent the escape or displacement of the collector from operative relation and engagement wit-h an electrical transmission line, such as a trolley wire; and to further function as guiding and finding means for a collector in its movements with respect to a transmission line during passage therealong.

A further object of the invention 18 the provision of guard members mounted on and carried by a collector of the trolley type, which members are raised or swung upwardlv above the collector on opposite sides of a transmission line by movements of the collector, or of the means supporting and carrying the collector, away from the transmission line, to prevent escape or displacement of the collector from operative. relation and position with respect to the transmission line; and to further provide a construction and arrangement of such guard members that they form and act as guiding and finding means for a collector in its movements toward and from a transmission line.

A. further object of the invention is the provision of guard plates mounted on a collector of the trolley type and raised or swung upwardly above the collector on opposite sides of a transmission line by movements of the collector away from the trans mission line; and to so form and construct the guard plates that the upper sections thereof are automatically swung inwardly and downwardly over the transmission line by the upward movement of the guard plates, in order to permit the guard plates to pass the transmission line brackets or supporting means without interference therewith; and to further provide surfaces to form guiding and centering means for the collector in returning to normal position engaging the transmission line.

A further object of the invention is the provision of guard mechanism for electrical collectors of the trolley type which mechanism includes collector mounted guard members actuated by movements of the collector away from a transmission line with which it is in operative engagement, or by equivalent movements of associated elements, to throw orswing the guard members upwardly above the collector on opposite sides of the transmission line; at a greater rate of movement than the movement of the collector (or other equivalent movement) away from the transmission line, so that, the guard members are always in position to prevent the collector from moving out of operative relation and alinement with the transmission line. v v

A further object of the invention is to provide a collector of the trolley type and automatically actuated and controlled guarding and finding mechanism therefor, of simple construction capable of withstanding and enduring the conditions encountered in service, and which collector and guard mechanism will be efficient and positive in operation and results.

A further object of the invention is to provide a trolley wheel particularly adapted .for use on and in connection with current collectors of the trolley type, which wheel is so formed and constructed as to provide a yielding cont-act surface or tread whereby considerable of the vibration to which such wheels are subjected is absorbed by the yielding tread and a more efficient and positive contact is obtained in operation thereof. llhth the foregolng and various other obects in vlew, which other ObJBCtS and their resulting advantages will be readily recognized and understood by those familiar. with the art, the invention consists in certain novel features. in constructions and incombinations and arrangements, of elements as Zontal plane.

more fully and particularly set forth and specified hereinafter.

Referring to the accompanying drawings:

Fig. 1 is a view in side elevation of a trolley and guard mechanism therefor embodying features of the present invention shown in normal operative relation and position with respect to a trolley wire.

Fig. 2 is a view in side elevation of the invention showing the trolley in position below the trolley wire and disengaged therefrom, with the guard mechanism in raised guarding position to guide the trolley into engagement with the trolley wire.

Fig. 3 is an end view in elevation of the invention in the position thereof as shown in Fig. 1.

Fig. 4: is an end view in elevation of the invention in the position disclosed in Fig. 2.

Fig. 5 is a view in side elevation of a trolley wheel constructed in accordance with the invention.

Fig. 6 is a transverse or diametrical cross section through a trolley wheel of the invention.

Fig. 7 is a side elevation of the tread member of the wheel and the manner of yielding ly mounting the same.

The various features of the invention are presented and illustrated in the accompanying drawings as embodied in a collector of the trolley type adapted for the transmission of electrical current from a fixed current carrying line to a moving vehicle, such as an electric locomotive, electric trolley car or other track vehicle, although it is to be understood that the instant embodiment is illustrated purely by way of example, as the invention is equally applicable to other forms of current collectors of the general type depicted and described hereinafter.

In the illustrated application of the instant embodiment of the invention, a. trolley supporting member 10 is more or less diagrammatically shown as indicating any and all suitable types of trolley supporting means.

The trolley supporting member 10 is mounted on and carried by any desired type of electric vehicle (not shown) in the usual manner well understood in this art, and provides for the operative attachmentof a trolley thereon and thereto, as for example by a reduced end portion forming a projection or tongue 11.

The trolley comprises a forked base member having a bifurcated shank portion 21 which receives the tongue 11 and is attached and secured to the tongue by means of a bolt, or the like, 22. In mounted position the forked base member 20 of the trolley extends from the trolley supporting member 10 and is disposed in a substantially hori- The spaced arms 23 of the forked member 20 are offset at their free ends above the plane of the ,arms to provide the elevated seats 24. These offset elevated free end portions of the arms 23 are provided with the curved substantially vertically disposed bores 25 forming bearings therethrough for the purpose hereinafter explained.

The attached shank end 21 of the base fork 20 is provided with a vertically disposed transverse bore therethrough in which is mounted a pin or bolt 26 formed with a bifurcated head block 27; having alined bores extending transversely through the spaced vertically disposed free ends thereof to receive the bearing bolt or pivot pin 28 which extends therethrough and. across and between the arms of said bifurcated head block 27. x

A collector or trolley wheel carrying fork 30 is pivotally mounted at the shank end 31 thereof on the pivot pin 28 between the bifurcated head block 27, and the spaced arms 32 of the fork 30 extend substantially'parallel with and in vertical alinement spaced above the arms 23 of the base fork 20. The outer free end of the fork 30 terminates above the elevated free ends 24 of the base fork 20, and a trolley wheel axle 33 is mounted in and extends across and between the free ends of the arms 32 of the fork 30.

The axle 33 is preferably of the hollow or similar oil reservoir formingtype and the ends of the axle 33 are provided with suitable oil cups 34: mounted thereon, which are connected and in communication with the hollow axle'33 by oil supply ducts or passages (not shown).

A trolley wheel 35 is rotatably mounted on the axle 33 between the free ends of the arms 32 of fork 30 and extends downwardly be tween and a distance below the base fork 20. Depending curved rods 36 extend downwardly from the free ends of the arms 32 through and slidably confined in the curved bores 25 formed in the free ends 24: of the base fork arms 23, and coiled expansion springs 37 are interposed between the elevated free ends 24 of the base fork 20 and the free ends of the arms 32 of the trolley wheel carrying fork 3O thereabove. The expansion springs 37 are secured at their opposite ends to the forks 20 and 30, respectively with the curved rods 36 depending therethrough and surrounded thereby. The lower free ends of the rods 36 depend below the base fork 20 and are provided with collars 33 at the lower ends thereof. forming stops adapted to abut and contact the arms 23 of the base fork 20 and limit upward movement of the rods through the bores 25, and hence limit upward movement of the trolley wheel carrying fork 30 away from the base fork 20. The ends of the rods 36 are also provided with suitableeyes 39 to which any suitable ropes or lines B may be secured for lowering or drawing the trolley wheel carrying fork 3O downwardly toward the base fork against the tension of the expansion springs 37.

Thus, from the foregoing it will be apparent that, due to the pivotal mounting of the fork at its inner end to the base fork 20, the'free end of the fork 30 with the trolley wheel mounted thereon and. carried thereby is capable of vertical swinging movement toward and from the base fork, and is normally forced upwardly from the base fork 20 by the action of the coil springs 37. The rods 36 act as guiding means to maintain the trolley wheel 35 and fork 30 in proper operative a-linement through vertical movements thereof toward and from the base fork 20, as well as providing means by which the trolley wheel can be lowered toward the base fork against the action of the expansion springs. In Figs. 1 and 2 of the accompanying drawings, the trolley as described, is shown in operative relation with respect to a trolley wire W supported by the usual or any other desired brackets B. In normal operative position the trolley wheel 35 is in engagement with the trolley wire lV-with the expansion springs 37 under compression and forcing the trolley fork 20 upwardly to maintain the trolley wheel 35 in positive engagement with the trolley wire. is the trolley travels along the wire W in engagement therewith, movements of the vehicle to which the trolley is attached toward and from the wire and variations in the vertical position of the wire, as well as all the movements due to the swaying or rocking of the vehicle and unevennessof road bed, are compensated for by the expansion springs which force the trolley wheel fork 3O upwardly and maintain the trolley wheel 35 against the wire WV in positive engagement therewith. However, as will be readily understood by those familiar with the operation of this general type of trol ley, the movements in use are relatively distributed between the base fork 20 and the trolley wheel carrying fork 30, which latter is capable of vertical swinging movement on and with respect to the base fork-20.

The invention provides and includes guard mechanism to prevent displacement of the trolley wheel 35 from operative relation with respect to the trolley wire V, which mechanism is automatically actuated and controlled by the relative movements of the base fork 20 and the trolley wheel carrying fork 30. In the instant mechanical adaptation of this feature of the invention, guard plates 40 are pivotally mounted on opposite sides of the fork 30 and extendupwardly thereabove on opposite sides of the trolley wheel 35. The guard plates 40 are positioned above the fork 30 and adjacent to the side faces of the trolley wheel 35 so as to provide the smallest possible space between the plates and the trolley wheel withmediate the ends thereof and substantiallyv below and in line with the studs 42 on the fork 30. A sleeve 45 is rotatably mounted on the shaft 44 extending between the spaced arms of the fork 20, and is provided intermediate the ends thereof with a lever 46 extending upwardly therefrom andinclined slightly forwardly from the arms 41 and yoke 43. The lever 46 terminates forwardly from and slightly above the studs 42 on which the guard'pla-te arms 41 are pivoted, and is oscillated by rotation of the sleeve 45 on and around the shaft44. The upper end of the lever 46 is pivotally coupled to a lever 47 extending forwardly from the yoke 43 intermediate the guard plate arms 41. The arrangement of levers 46 and 47connec-ting the sleeve 45 carried by the base fork 20, with the yoke 43 carried by the fork 30, in effect provides a. bell crank connection therebetween for actuating the guard plates 40 through they arms 41 which are connected by the yoke 43. i

p In normal position of the trolley wit the trolley wheel 35 maintained in operative engagement with the trolley" wire VV by the action of the expansion springs 37 on the fork 30, the guard plates 40 are in position on' opposite sides of the trolley wheel above the fork 30 with the arms 41 inclined rearwardly and the plates 40 inclined downwardly, as clearly shown in Fig. 1 of the accompanying drawings. Now, if the base fork 20 moves downwardly away from the trolley wire due to a corresponding movement of the vehicle; upon which the trolley is mounted, or any equivalent condition which increases the distance between the base fork 20 and the trolley wire the expansion springs 37 force the free end of the fork-'30 upwardly andmaintain the trolley wheel 35 in engagement with the trolley wire The upward movementof the free end of the fork 30 and the resulting increase in the distance between the fork 30 and the base fork 20, causes the lever 46 mountedon the (base fork 20 to exert a downward and rearward pull upon the bell crank lever 47 of the guard plate yoke 43 which results in swinging the guard plates upwardly above the trolley wheel 35 on opposite sides thereof and to prevent lateral displacement of the trolley wheel. Due to the position of the le wheelcarr in fork 30 and the )ivotal l s a connecting of the guard plates elO with the base fork by the bell crank lever ll. and the lever 46, :iforming a toggle connection of such leverage as to throw or swing the guard plates ll) upwardly at a greater rate of movement than the upward (or equivalent movement associated elements) of the fork and trolley wheel away from thebese fork 20. When the conditions are such that the base fork 20 moves a sufiieient distance away from the trolley wire W, the expansion springs; 37 force the trolley wheel carrying fork 3O upv i.

-.dly away from the base fork 20 until the collars 38 on the guide rods 37 contact with the elevated free end portions 2a of the base fork arms 23 and stop the movement of the fork 30, after which the entire trolley assembly moves as a unit from the trolley wire. This extreme position is shown in Fig. 2, where the trolley assembly has moved to a posi tion below the trolley wire, such as to move the trolley wheel out of or gagement with the trolley wire W. In tl is position. the guard plates 40 are thrown upwardly to their limits of upward movement above the trolley wheel 35 and trolley wire il and upon movement of the trolley upwardly toward the -trolley wire, act guiding and alining means to insure the operative ongagement of the trolley wheel with the trolley wire.

In order to obtain a greater upward extent of guard plate surface, particularly with the guard plates in the lo or normal positions, and to provide further sufaces for guiding and centering the trolley wheel to and on the trolley wire, without resulting in the interference of the guard plates with the trolley wire supporting means, or other obstructions above the trolley wire, in the upward extended positions of the plates, 'i'oldable or depressihle wings are provided on the upper edges of the guard plates lit) in upward continuation thereof. The wings 50 are of substantially triangular shape, formed by inclining the upper edges thereof forwardly, so that the highest points of the wings are at the upper rear edges, as will be readily seen by reference to the drawings.

In the illustrated example the wings 50 are pivotally or swingably mounted on and extend upwardly from the top edges of the guard plates 40 by means of hinges 51 which provide horizontally disposed axes for the lateral swinging or folding of the wings 50 inwardly toward each other above and across the trolley wheel 35 and be The wines 50 by the inoveine automatically actuated of the guard plates l0 and the trolley wheel carrying fork 80,

through the medium of operating connections therebetween; Each guard plate 40 is provided at the forward end on the outer.

side thereof with a pin 52 which depends downwardly below the wings and extends a distance laterally (outwardly) fromethe upper forward portion of the guard plate wing 50, respectively, thercahove. Links 5a.

are pivotally mounted on opposite sides of the trolley wheel carrying fork 30 to the rear of the pivotal mounting of the guard plate arms ll, and extend downwardly and rearwardly therefrom.

Each lever 53 on the guard plates $0 is pivot-ally connected at the rear end thereof with the link 5%- mounted on thefork 3O therebelow, by a pair of telescoping rods 55 and 56, the upper rod 56 of which is offset inwardly to the rear end of the lever 53 with which it is pivotally connected. loil springs 5? connect the rods 55 and 56 together in such a manner that when the force or pull on the rods is greater than the tension of the springs 57' therods are extended and upon decrease of the force on the rods below that of the springs the rods are telcscoped and returned to normal position.

.lflach arm 32 of the fork 30 is provided with a lug 59 adapted to engage the link 5% pivotally mounted thereon, respectively, on the outer side thereof.

The wings 50, so mounted and connected are operated by the movements of the fork 30 and the guard plates 40 mounted thereon. In normal operative position of the trolley, as illustrated in Figs. 1 and 3 of the drawings, the wings 50 are maintained in substantially vertical position in upward continuation of the guard plate 40, respectively, by the rods 55-56, which are drawn downwardly by the position of the fork 30 in lowered position on the base il; 20, and

maintain the levers 53 in )OSltlOli drawin the wings outwardly through the medium of the pins 52 in the depressed slotted ends of the said levers As the trolley wheel carrying fork 30 moves upwardly away from the base fork 20, the guard plates are swung or raised upwardly at a greater rate of movement than that of the fork 30, and the wing rods 55, 56 are raised by the guard plates, the movement upward of the rods taking place at the pivotal connections of the links 54: with the rods and the fork 30 with out substantial movement of the levers 53 due to the relative positions of the fulcrum points of various connections. When the movement upward causes the lugs 59 to engage the links 5% on the fork 30, the upward 50 contact at their rear high ends, as is clearly shown in Fi g. 4 of the drawings. The springs 57 are of such a tension that the force required to swing the wings 50 is less than that required to expand these springs, with the result that the arresting of the upward movement of the rods 55, 56 does not result in any substantial extension thereof.

lVith the wings 50 in position swung over: and across the trolley wire 7, a v or triangular spaced opening is formed therebetween decreasing 1n width rearwardly, due. to the shape of the wings.

By this construction and arrangement the trolley wire supporting means, such as the brackets B can readily pass between the wings 50, due to' the mounting of the telescoping rods 55, 56 connected and joined by the springs respectively, as the wings are forced open by the brackets and immediately swung back to closed position by the. action of the springs 57 Further, in the embodiment shown, when the'guard plates 40 are swung upwardly to extreme positions the forward ends thereof, and of the wings 50, are lowered below the trolley wire and hence by the provision of the forward opening between the wings any interference with the trolley wire is avoided. it willbe noted that the spacing of, or distance between the'lugs 59 and the links 54: may be-varied and determines the relative point in theupward move ment of the fork 30, or downward movement of the base for: 20, at which the wings 50 will be swung inwardly toward each other above and across the trolley wire.

In the operation and use of the trolley and automatically actuatedand controlled guard mechanism therefor of the invention, with the: trolley wheel in normal operative engagement with the trolleywire, the guard plates 40 and wings 50 are in substantially vertical =lowered= position along opposite sides of the trolley wheel and trolley wire, as shown in Figs. 1 and 3. Now, if during the passage of the trolley wheel along the trolley wire, it is thrown or forced downwardly by anyiof a number of conditions,

upon removal of such conditions the springs 7 37 immediately force the fork 30 and wheel upwardly and the position of the guard plates and wings will preventla-teral displacement and will guide and al ne the wheel to properly return to operative engagement with the wire. If the movement encountered by the, trolley is such as to lower the base fork 20, or to increase the distance The action of the wings 50 depends and" is determined by the relative positionlofthe lugs 59 and the links 54, and these lugs, may be arranged'to swing the wings 5O inwardly above and across the wire at any desired point in the upward (or equivalent move} ment) of the fork 30. When the wings50f are thrown or swung across thewire, preferably during the extreme downward move- .ments of the trolley wheel 35, they act as in-' clined guiding and centering surfaces for the trolley wire WV to insure proper return of the trolley wheel and to-aid the same in finding the trolley wire'lV. It will beclear and understood that the action of the guard mechanism is entirely automatic and controlled by the relative movements of and between the trolley and the trolley wire; The ropes R attached to the guide rods 36 provide for lowering or disengaging the trolley from the trolley wire, and for place ing the trolley inoperative engagement with the wire.

In Figs. 5, 6 andT, the construction and arrangement of the trolley wheel 35 of the invention is disclosed. The trolley; wheel 35- comprises the annulartre admember 60 l1av-. ing the trolley. wire receiving groove 61.

therearounchthe side plates 62fof greater diameter than the tread member 60 and; pro-.

viding the opposite flanges'63 of the wheel,

and a spring assembly mounted in and en'-- closed bythe tread member 60 and the side plates 63. The spring assembly comprises an annular band 6% which fits snug-1y within and against the inner-peripheiy of the.

tread member 60 and is maintained in position ,therewithiir against rotation there x around by means of a pair ofribs 6 5 dis posed transversely across the outer periphery of thelband 6e and atopposite points thereon. These ribs 65 are received and confined in suitable grooves provided on the inner periphery of the tread member 60' and thus prevent" the band 64" from turning around within the tread member 60. as will be readily; seen by reference to. Fig. 7 ofthe drawings. A bearing sleeve-or journal 66 is j mounted in position centrally of and ;"con-' centric with the band 64 and forms aQbe'aring for mounting the tread member 60 onl'a" suitables haft or axle. The bearing, sleeve 66 is mounted in position in andon the tread- III member by a series of radially disposed coil springs 67 attached at their inner ends to a series of eyes 68, respectively, spaced around the bearing sleeve 66 intermediate the ends thereof, and attached at their outer ends to a series of eyes 69, respectively, spaced around the inner face of the band 64:. Thus, in effect, the bearing sleeve 66 is supported in position centrally of the band 64 and of the tread member 60 by the radially disposed, spoke forming, coil springs 6'7, so that, the tread member is yieldingly supported.

The side plates 62 forming the wheel flanges 63 are each provided with a boss having an axial bore therethrough and in assembled position of the wheel 35,.con-

structed as above described, the side plates 62 are placed in position on opposite sides ofthe tread member 60 with the bores of the bosses 7O alined with the bearing sleeve 66.'

The wheel axle 33 is extended through the alined bosses 70 and bearinesleeve 66, so that, the assembled wheel is rotatable thereon. The side plates, in the illustrated application and mounting of the wheel are maintained in position against the tread member 60 by the opposite spaced arms 32 of the fork 30 between which the wheel is rotatably mounted on the axle 33.

It will be noted that the side plates 62 are not attached to the tread member 60, being maintained in position thereagainst by the axle 33 and fork arms 32, so that, in operation the wheel tread member is vieldingly mounted on and around the bearing sleeve 66 and between the side plates 62 by the ra dially disposed coil springs 67. In this manner considerable of the vibration to which the wheel is subjected in. operation is absorbed and when the wheel is in position forced against the trolley wire I by the expansion springs 37, a more positive contact and engagement with the trolley wire lV is obtained.

The wheel 35 of the invention, above described, is not limited to use in the particular applicationillustrated, as it will be clear that a wheel so constructed and embodving the various features pointed out is capable of general application and use where it is desirable to utilizea yieldingly mounted tread to reduce vibration and secure positive engagement for the wheel.

The term trolley wheel where it occurs in the appended claims is used in a broad,

generic sense to include any and all collectors or other'contact members whether of Desiring to protect my invention in the broadest manner legally possible, what I claim is 1. In a trolley, a relatively fixed substantially horizontally disposed base fork, a verticallyswingable fork pivotally mounted at one end thereof to one end of said base fork, extending above said basefork and spaced therefrom in substantially vertical alinement therewith, a trolley wheel mounted in the vertically swingable free end of said pivoted fork, and means interposed between the free end of said pivoted fork and said base fork normally forcing the free end of said pivoted fork away from said base fork.

2. In a trolley, a base fork attached at one end thereof, a second fork pivotally mounted at the attached end of said base fork and extending thereabove and spaced therefrom,

a trolley wheel mounted in the free verti pivoted fork, guide rods depending from i the free ends of the pivotally mounted fork and extending downwardly through and slidably confined in bores in the ends of the base fork-arms, andexpansion springs interposed between the free ends of said pivoted fork arms and the ends of the base fork L arms therebelow, the said springs surrounding and confined in position by the said guide rods.

4,111 a trolley, a relatively fixed base fork, a second fork pivotedat one end to said base fork and extending thereabove and along and spacedfrom said base fork, a trolley wheel mounted in the free vertically swingable end of said pivoted fork, and'vertically disposed guard plates pivotally mounted on opposite sides of said pivoted fork and extending thereabove along opposite sides of said trolley wheel, and means for raising and lowering said guard plates actuated by the relative movements of said pivoted fork and said base fork.

In a, trolley, a. trolley wheel, a vertically swingable support therefor, guard plates disposed on opposite sides of said trolley wheel, laterally swingable extensions pivotally mounted on said guard plates the said guard plates raised and lowered by the" movements of said vertically swingable t'rol ley wheel support. and means controlled by the movements of said guard plates for swinging said extensions inwardly across said trolley wheel.

6. In a trolley, a trolley wheel, a vertically swingable support therefor, guard plates pivotally mounted on said support and extending upwardly on opposite sides of said trolleywheel, laterally swingable extensions in the vertically swingable' free end of said second fork, means interposed between said base fork and said second fork normally forcing the free end of said second fork upwardly from saidbase fork, and

guard plates pivotally mounted on said sec' ond fork and extending upwardly thereabove on opposite sides of said trolley wheel, the said'guard plates swung upwardly above said trolley wheel by upward movements of said second fork and lowered by'downward movements of the said second fork.

8. In a trolley, a base fork adapted to be attached to a trolley support, a second fork pivotally mounted at one endthereof to the attached end of said base fork, the said second pivotally mounted fork extending above and spaced from said base fork in substantial vertical alinement therewith, a trolley wheel mounted in the vertically swingable free end of said second pivoted fork, means normally forcing the free vertically swingable trolley wheel carrying end of said-second fork upwardlv from said base fork, guard plates pivotally mounted on said second fork and extending upwardly thereabove on opposite sides of said trolley wheel, and links pivotally mounted on-said base fork and pivotally connected to said guard plates, the said guard plates swingable upwardly and downwardly by the relative movements of said base fork and second fork pivotally mounted thereon.

9. In a trolley, a trolley wheel. vertlcally swingable guard plates on opposite sides thereof. the said guard plates controlled by the vertical movements of said trolley wheel, laterally swingable extensions mounted on said guard plates, and means controlled by the vertical movements of said guard plates for laterally swinging said extensions.

10. In a trolley, a trolley wheel, a vertically swingable support therefor, guard.

plates pivota ly mounted on said support and extending upwardly therea-bove on opposite sides of said trolley wheel, the said guard plates vertically swingable and raised by upward movement of said trolley wheel support and lowered by downward move ments thereof, and means mounted on said guard plates adapted to be swung inwardly therebetween and across said trolley wheel by upward movements of the said guard plates.

l1. Ina trolley, a pair of spaced guard members having inwardly swingable extensions adapted to be swung between and across said guard members,

12. In a trolley, vertically plates having laterally swingable vertical extensions pivotally mounted thereon adapted to be swung by vertical movements of said guard plates.

13. In a trolley, vertically disposed spaced guard plates. having wings pivotally mounted thereon in vertical extensions thereof for inward swinging movement therebetween.

14:. In a trolley, vertically disposed spaced guard plates, wings pivotally mounted at the upper ends thereof in vertical continuation thereof and adapted to be swung inwardly and laterally across and between said guard plates. I I

15. In a trolley, vertically swingable guard plates, and wings pivotally mounted on said guard plates in extension thereof, the said wings laterally swingable by the vertical movements of said guard plates.

16. 'In a trolley, a pair of spaced vertically disposed guard plates having substantially triangular shaped wings pivotally mounted on the upper ends of said plates in vertical continuation thereof, the said wings in wardly swingable toward each. other across said guard plates to abut at the upperends thereof'and form a bridge having a substantially triangular opening between said guard plates. i i

17. In a-trolley, a trolley wheel, a vertically swingable support therefor, guard plates pivotally mounted .on said support and extending upwardly thereabove on opposite sides of said trolley wheel, the said guard plates raised by the upward movement of said trolley support and lowered by the downward movement thereof, and laterally swingable wings mounted on said guard plates, and swung inwardly across said trolley wheel by the upward movements of said support and guard plates mounted thereon.

18. In a trolley, a trolley wheel, a vertically swingable support therefor, guard plates pivotally mounted on said support and extending upwardly the'reabove on opposite sides of said-trolley wheel, the said guard plates raised above said trolley wheel by the upward movements of said support and lowered by the downward movements thereof, laterally swingable wings mounted on said guard plates in vertical extension thereof, the said laterally swingable wings movable guard pivotally connected with said support whereby upward movements thereof swing said Wings inwardly between said guard plates and across said trolley wheel.

19. In a trolley, a trolley wheel, a vertically swingable support therefor, guard plates pivotally mounted on said support and extending upwardly thereabove on opposite sides of said trolley wheel, the said guard plates raised above said trolley wheel by upward movements of said support and lowered by downv-rard.movements thereof, laterally s .in 'ablc wings mounted on said guard plates lll ver ical extension thereof, and rods pivotally connecting said wings with said trolley wheel support, whereby upward movements of said support and said guard plates swing said wings inwardly across and above said trolley wheel.

20. In a trolley, a trolley wheel, a vertically swingable support therefor, guard plates pivotally mounted on said support and extending upwardly thereabove on opposite sides of said trolley wheel, the said guard plates raised above said trolley wheel by upward movements of said support and lowered by downward movements thereof, laterally swingable wings mounted on said guard plates in vertical extension thereof, rock levers pivotally mounted on said guard plates below said wings and pivotally coupled thereto, rods pivotally connecting said rock levers with said trolley wheel sup port, and means mounted on said support adapted to actuate said rods and rock levers to swing said wings inwardly upon upward movement of said support and guard plates, and to swing said wings outwardly upon downward movement thereof,

21. In trolley, vertically swingable guard members having laterally swingable extensions, and means for swinging said 6X tensions at a predetermined point in the vertical movements of said guard members.

22. In a trolley, a base member, a collector carrying member pivotally mounted at one end portion thereof on said base member, and yielding means normally forcing the rrom the said base member.

free end of said collector carrying member 23. In a-trolley guard, the combination of a vertically movable guard member, with a guide member pivotally mounted thereon and laterally swingable by the vertical move ments of said guard member.

24. In av trolley guard, a collector, a support therefor, vertically movable guard members mounted on saidsup'port, laterally swingable guide members mounted on said guard members, and means actuated through the vertical movements of said guard members tor laterally swinging the said guide members.

25. In combination, a collector, swingable guard members therefor adapted to be controlled by the movements of said collector, guide members mounted :tor lateral swinging movement over and across said collector, and means actuated by the movements of said guard members for laterally swinging said guide members.

2-6. In a trolley guard,- a collector, a support therefor, guard; members pivotally mounted on said support and swingable to position extended beyond said collector by movements thereof from normal operative position, guide members pivotally mounted ior swinging movement across said collector, and means actuated by the movement 01 said guard members to extended position for swinging the said guide members to position across said collecton 27. in a trolley guard, a collector, guard members mounted for movement to extended position beyond said collector by movements of the collector from normal operative position, guide members pivotally mounted for swingmg movement across said collector, means actuated byv the movement of said guard members to extended position for swinging said guide members to position across the said collector, and means yieldingly maintaining said guide members in position across the collector to permit swing ing of said members toward normal position against the tension of said means.

Signed at Meyersdale, Pennsylvania, this 5th day of July, 1922.

MILTON FIR-L.

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