US1052586A - Trolley-stand. - Google Patents

Description

HOLLAND.

TROLLEY STAND.

APPLICATION FILED M0219, 1910.

Patented Feb. 11, v1913.

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H. HOLLAND.

TRQLLEY STAN APPLIGATIQN PILIED Dao. 19, 1910.

Patented Feb.'11,1913.

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HENRY HOLLAND, OFCLEVLAND, OHIO, ASVSIGNOB TO THE HOLLAND TROLLEY SUPPLY COMPANY, OF CLEVELAND, OHIO, A CORPORATION F- OHIO.

' TROLLEY-STAND.'

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Specication of LettersPatent.

PatentedlFeb. 11, 1913.

Application filed December 19, 1910. Serial No. 598,000. v

To aZZ .ich om t may concern: Be 1t known that I, HENRY HOLLAND, a

5 State of Ohio, ihave invented a certain new and useful Improvement in Trolley-Stands, of which the following 'is a full, clear, and exact description.

The principal object .of theinvention is to produce a thoroughly practical trolley ,I stand adapted for use'under all of the conditionsl which are commonly met with in use, and particularly which will not pro- `ject much above the car, and will allow the f.ft1'olley pole to beV forced down very clo-se ,fito the car by the overhead conducto.` Iwhereby the trolley without breaking its opera-- tive connectionwith said overhead conductor, may'pass beneath bridges and. other overhead structures which are Iso placed .that little clearance... is left between them and the top' of the car. i y

The trolley stand in which the present 'invention is embodied operates easily Iso as v to allow the trolley pole.to maintain itsl e11- gagelnent with the overhead conductor 1 in rounding curves. It is provided with means for holding t-he trolley pole socket downl in a lconvenient positionfor takingy out and putting in thetrolley pole; and it is also so constructed that if the trolley leaves the loverhead conductor so that ythe pole is swung' violently upward, this spring-in duced movement ,of said trolley pole will be checked by the same spring which' pro- .duces said movement, and thereby injury to the device will be prevented.

IThe invention embodied in the best form known to me is shown in the accompanying 40 drawings, and is hereinafter described, and

the novel combinations o f parts which impart the qualities and characteristics above referred to .are definitely pointed out 1n the appended claims. v

In the drawing, Figure 1 is a plan view of a trolley stand embodying the invention.

Fig. 2 is a side1 elevation of the same, the

` latter igurefshowing the positionsl of the parts when the trolley pole is pulled down as'far as it willlgo. Fig. 3 is a slde eleva? tion which shows in full linesthe' trolleyg pole in a substantially vertical position and the lother occupying the phositions'uthey -will v Voccupy under such cmifutions.v Fig, 4 lsa sectional' side elevation offthe trolley 'stand 55 showing the pole ,held down` in itsv lowest position. Fig. 5 1s' a bottom-'plan View of the two relatively rotatable parts of said stand; and Fig.' 6 is a. sectional view .of the outer end ofthe pole' socket showing the' 60 clamp employed to hold the. vpole in place.

Referring to the parts by letters, A represents the ring shaped fixed base member of the trolley stand, rsaid ring having shortv legs a, by means of `which it may be attached 65 to the top of a car. B represents the rota' table base member which is also a ring which fits outside of the ring A, and is held in proper relation thereto, and allowed to 4rotate around the ring A with little fric- 70 tion, byvmeans of anti-frictionvba'lls interposed between these two rings. The ring A has in its outer. cylindrical periphery an annular groove-a which in vertical section y is approximately semi-Cylindrical in shape.. In the inner cylindrical -periphery of the f ring B therejls also an annular-,groove b whichin vertical section is approximately semi-cylindrical in shape.- Then these'twoY rings are placed in operative position, the one within the other, as shown, there is between theman annular tubular' raceway into which balls C"are"iitted. There is ya hole through vthe ring B through which the balls may pass into thistubular raceway, and lwhen a suiiicient number 'of balls have y been put into the raceway, this hole is filled with a plug b', fashioned on its inner end toform a continuation of the groove b.

This plug is held in proper position by 'a 90 set screw b2 'which'.screws down through thev top of ringB and into a hole provided to receive it in the plug b.

-, The yoke D straddles7 and is pivotedtoI the .ring lB at diametrically .opposite 95- points,-the pivots being represented byrbt. The outer end of this yoke has a socket Z .for the reception .of the trolley pole F. The outer end of this socket is cut away on one side, and its place supplied by a laterally 1,00

clamp is moved laterally to firmly clamp the in the working position @hooks its moy/fpolebetween itself and the opposite side Vof the pole socket.

Fixed to the ring B and extending horizontally therefrom in a direction aty right angles tothe axis of the yoke D is a rod G. Two bars H and K are niovably mounted on 1 this postand project on both sides thereof,

and a spring J surroifm'ding the rod G is compressed between them. This spring is rods M' which arerespectively pivoted to ears Z2 ,on the yoke D on opposite `sides thereof, and the outer ends of these rods pass ltosely through holes near the'ends of the bar K. These ends of the rods are threaded, and nuts m screw onto them and thereby regulate the tension of the spring. A shoulder -g ofsome sort is provided on the outer vend of the rod Gr Jfor engagement,

lcertain circumstances to be eX- plained, with theb`ar K. Two links N are pivotally connected with the yoke D iiear opposite. sides thereof, said pivots' being parallel With the axis upon which the yoke' strings. Each of these links .passes through ahole in the bar H, and each link is provided with a shoulder n for engagement with. said bar, so as to limit the distance which saidlinks indy pass into said holes.'

From the' foregoing description, Vit will be seen that the spring exerts continuous tension upon the' yoke, tending to swing it up- 'ward,.even though the yoke is swung down to the position shown-by full lines in Fig; 2, where -it practically touches thet-op of the .car roof.v Under ,these 'conditions the If, however, `when the trolley is in some work .highestpoint of the entire structure `will be the ears on the yoke to which the rods MV are'lpivoted, a distance of not more than. about tive inches above the top ofthe car.`

The spring then continues .to act effectively unt-il the ypole reaches a. position about such as is shown by the dotted lines in Fig. 3, in

which'it Vis nearly vertical. This is the position in which the pole will normally come to rest, because when in this position the shoulders n on the links N engage with the bar H, and thereby further movement upward ofthe yoke isresisted by the spring.

ing position the y'trolley should. jump from the wire, the spring will immediately lswing the yoke .and pole upward. Its fmomentumf Wil1,. of ,c ounse,vcarry`the yoke beyond the' position lin ygliiehit wouldnormally come to I rest;'lbut,gras the yokenioves beyond'this' positiomit will m1ove links N, and they in turn will'finoye-,the barfH,.which movement' will, howeverbetresist'e'd :by lthe Spring which thrusts against the spring plate K,

,and the rearward movement of said spring' plate will be ,checked b v its engagement' with the shoulder y. In other words, the same spring which utilized to hold the trolley ment when itiflies from the overhead wire and thereby tliepossibilities of injury to the apparatus under such conditions is mini iniz'ed.

Among the adjunctive features to which attentionjmay be called which add to the. practicalvalue of the device are the follow ing: A loop I) is pivoted to the yoke in suer. position that when the yoke is pulled down into horizontal position, this yoke may be swung underneath a stud S fixed to and projecting out from the 'ring B Thereby the yoke may be held down whenever it il desired to have .it heldl down.

The parti-ng between the rings A and B it cn-the top and bottom surfaces of these rings. To protect Athe ball bearings from dust a dust plate Q is fastened to the ring A overhanging' this cylindrical parting line. The conductor T for electrically connecting this trolley stand with the motor on the car may be secured in alhole Iin a connector R having winger by which it isremovably secured to two of the legs a. A contact spring V is fixed to this connector. R in such wise that it has a. rubbing engagement with the lower surface'of the ring B.

The trolley stand above described is shown with one spring only` but. it is not in f tended that the appended claims Shall ex clude'trolley standswhich employ two or more ofsuch springs.

Attention is called to the fact that the Ipivots m anda b which the rods M and links N are connec ed with the yoke D are different distances. from the laxis of the pivot bf* around which said yoke swings. NEW, under certain circumstances which m y come about in practice, 'as for example, when-thenuts m have been lscrewed upon rods M quite a distance, in order to apply the required tension to spring J, the mere passing ofthe yoke D forward over the center Willinvolve the movement toward each other ofk the plates'H and K,aiid this movement will be resisted by the spring whereby the forward swinging of yoke D is v checked. This action-will take place under the stated conditions, even if plate K does not contact shoulder g. Under suoli condi- 'tioiis,-which may, of' course. be made the universal conditions of the device, the shoulder f/ vis unnecessary.

.Having described my invention, I claim: 1. In a trolley stand, a movable base 'menilber adapted to be mounted upon a car and to turn about 'a 'vertical4 axis, a forwardly projecting rod fixed to said member, bars movable along said rod, anda springecom ypressed between said bars, combined with a trolley yoke pivoted to said base member. rods pivotally connected with said yoke above the pivotal point of the yoke and passl ing loosely through holes in the front bar 'and having adjustable nuts on their front ends, and two links which are pivoted to said yoke above the pivotal point'of the yoke and at points Whiohare farther from the axis of the yoke .than are the pivots oi the rods -mentioned, said links passing loosely through holes in the rear bar and having shoulders behind said bar and adapted to engage with it. l 1

2. In a trolley stand, a ring-shaped base member 'adapted to be' fixed to a car andbeing provided in the outer peripheral surface thereof With an annular groovel which forms half aball-race, a movable ringlshaped melnberwhioh embraces the ringshaped base and has in its inner peripheral f surface an annular groove which formsthe other half of said ball-race, balls in said raceway, a projecting portion carried by the last mentioned movable ring-shaped member, an` opening in said projecting portion, a rod lsecured in said op`ening, a front and rear bar slidably mounted upon said' rod-r a stop member upon the end of the rod, yoke Y pivoted upon 4thegsides of t-he outer ring,

rodspivoted upon said yoke above the axis of the yoke and engaging with the front bar and projecting through openings therein, nuts upon the front ends of 'said rods, a.

second pair of rods pivoted upon `the yoke above the airis of the yoke and farther from the axis of the yoke than the pivotal point of the rods rst mentioned, said rods passing through openings in the rear' bar and provided with shoulders adapted to engage the rear bar. v

3; In a trolley stand, a movable base meinber adapted to be ruoizlntedv upon a car and to turn about a vert-ical axis, aorvvardly project-ing rod aiiXed to said member, bars;l

movable along said rod, a spring ,pushing said bars apart, a trolley yoke plvoted upon said base member, rods-pivotally connectedK with the yoke above the of the yoke and adapted to engage the. bar upon vthe rod remote from the yoke, two links pivoted upon the yoke above the-axis of the yoke and passing loosely through openings in thebarupon the rod'nearest the yoke, -saldiinks 'being pivoted :farther away from the axis of the yokethan the said rods, and being provided with shoulders which engage with the said bar, substantially described.

In testimonyv whereof, I hereunto affix my signature in the presence of two witnesses.

HENRY HULLND.

vWilnesses 1 .El L. TnUnsroN, I? Srmnrven.

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