US1822620A - Trolley shoe - Google Patents

Description

Sept. 8, 1931. A. L. HENRY TROLLEY SHOE Filed May 2, 1930 Patented Sept. 8, 1931 UNITED STATES PATENT OFFICE,

I ANDREW L. HENRY, or INDIANAPOLIS, INDIANA, AssIeNo'R TOJTROLLEY'SHOE WHEEL i trolley pole forward whenthe car is in re- ,vide a sliding contact trolley shoe which will operate in a reverse mot1onw1thout being 550 which are made a part hereof and on which 4 shoe showing the position occupied when the v and having a spider 11 pivoted therein on pin 12;v One arm of the spider 11 hasbifurholder by the simple operation of cutting the COMPANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA TROLLEY snon Application filed May 2, 1930. Serial No. 449,332.

This invention relates to trolley shoes, with to the side of the holder at 19, andto the side particular attention to the mechanism for of the harp at 20. This shunt wire gives aiding the shoe during the reverse travel of greater current carrying capacity, and prethe car. i a V vents the burning of the pins 12 and 28 or An object of the invention is to provide a their eyes, by the current which would arc trolley shoe which will provide better contact across the oil films therein. with the trolley wire during the reverse mo- The arm 21 of the spider 11 has a roller 22 tion of the car, and which will at the same mounted on its upper end. I This roller 22 time eliminate the possibility of pulling the forms a back-up wheelby rolling against the wire 23 when the car is in reverse motion. The end of the harp 10 has a stop shoulder 24 against which a lug 25 on the spider 11 contacts to limit the upward movement of the spider. A pin or lug 26 on the spider 11 contacts with a shoulder 27 just beneath thelower end of theharp to limit the downward movement of the spider. The spider also carriesa stop pin 29 which contacts with shoulder 30 on the holder 15. A shoulder 31 on the holder 15 contacts with a side of arm 13 on the spider 11 at 32 to limit any possible counterclockwise rotation of the shoe. The pin .12 on which the spider is pivoted, and the pin 28 on which the holder is pivoted, are provided with oil holes 33 and 34, as shown in Figure 1. I

When the car is moving forward, the friction and pull tend to forcetread 16 back, and this holds the trolley in position as in Figure 1, parallel with the wire 23. The backward pull on the tread 16 and the holder 15 as a unit, pulls back on pin 28 which places a horizontal backward pull onthe bifurcated arm 13, holding the spider 11 so that stop lug 26 is against shoulder 27, and arm 21. is as far down as possible, and wheel 22 in that arm 21 is verse motion, which would buckle the pole and endanger the over-head equipment.

A further object of the invention is to pro- 65 led, and which will so back without manual assistance, automatically bringing. into play a combination wheel and slide for backing.

Referring to the accompanying drawings 70 similar reference characters indicate similar P rta Figure 1 is a side elevation of the trolley car is moving forward,

Figure 2, a side elevation of the shoe showing its position when the car is in reverse,

Figure 3, a perspective view of a detail of the shoe, and e Figure 4,, a perspective View of another detail ofthe shoe. i a

In the drawings, numeral 10. indicates a trolley harp having its upper end bifurcated,

cations 13, between which is pivoted a lug 14 on the under side of the trolley shoeholder-well below the wire 23. I 15, through which lug 14 and the bifurcated When the car starts to back the reverse presarm 13, is placed pin 28. The holder. 15 has sure is applied, andthe friction andpush of l a grooved tread 16 secured 011 its upper side. the backingcar push the unit consisting of This tread 16 is preferably secure-d to the tread 16 and holder 15horizontally forward. holder 15 by meansof the cotter keys 17. The upward trolley tension on the trolley -When the tread becomes worn, it may thus pole and harp 10 holds the tread 16 fiat and be removed and a new one fastened to the in full contact with the wire 23'as the back- 1 ing movement pushes the unit forward. .As tread 16 and holder 15 move forward, pin 28 comes forward with them, being pulled by the lug 14 through which it runs. Pin 28 also extends through the bifurcations of arm 13, and so pulls arm 13 forward, and as arm two cotter keys 17, removing the tread 16, and replacing both it and the keys.

In order to provide better electrical contact between the shoe and the harp, a wire 18 of high current carrying material is secured current supply at all tlmes.

tread 16 forward, but it remains in full contact with tliewire 23, and the spider 11 is held forward as explained, keeping wheel 22 tight against wire 23, and enabling the car to back on arevolving wheel, whichv removes any possibility of bucklingthe trolley pole while backing.

hen the car starts forward, the pressure" is again reversed, and becomes a pull which slides tread 16 back horizontally to the normal position in Fig. 1. As tread16 and tread holder 15 come backto normal positiompin 28is pulledback, as is alsoarm 13, and arm 21 movesdownward again as the spider 11 pivots on axis pin 12, and the wheel 22 is loweredto normal.

The pin 28 enables the horizontal move ments of-the tread and holder. to-take place and still have tread 16 continuously in full contact'with' the wire 23, delivering a full It will be obvious to those skilledin the art that various changesmaybe made in my deviee=without departing from the spirit of the invention, and therefore I do not limit myself to what is shown in the drawings anddescribed in the specification, but only asindicatedin'the appended-claims.

Having thus fully described my said invention, what I claimas new and desireto secure by Letters Patent, is:

1. A trolley shoecomprising a harp, a spiderpivoted to'the harp, said spider having two arms diverging upwardly from the pivotal point with respect to said harp, a frame pivotally mounted" in oneof the arms, said frame carrying a trolley contact shoe detachably secured thereon, the other arm of'the' spider carrying a roller for contact with the trolley wirewhen the car is moving backwards, substantially as set forth;

2 A trolley shoe comprising a harp, a spiderpivoted in the liar-p, said spider having two diverging armsextending from the point of rotation with-respect to saidharp, a frame pivotallymounted in onset the arms, said frame carryinga trolley'contact shoe detachably secured thereon, theother arm of'the; spider'carrying a roller movable to contact with thetrolley wire when the'car is moving backwards, anda separate flexible cond'uitattachedtothe'harp and to the said frameto provide goodelectrical contact between the harp and theshoe to avoid arcing and burningout' lubricant from-the bearings on which the frame and spider pivot, substantially as set forth.

3.- A trolley shoe comprising a harp, a spider pivotally' attached" to the harp, said spider having a-pair of'arms, one extending upwardly on each side of the pivotal point, a frame pivoted in one of the arms, said frame carrying a trolley contact shoe, the free end of the other arm of the spider carrying a roller, said roller being brought into contact with the trolley wire when the car is moving backwards, the harp being provided with stop lugs for limiting the movement of the spider beyond a predetermined distance in either direction, substantially as set forth.

4. A trolley shoe comprising a harp, a spider mounted in the harp, a pair of arms on the spider, a frame mounted on one arm of the spider, said frame having a trolley tread mounted thereon, a wheel carried by the other arm. of the spider, said tread frictionally engaging thetrolley wireto holdthe said wheel'out of engagement with the trolley wire when the car is moving forward and said tread moving horizontally forwardto rotate the spider onits pivot to move the said wheel intoengagement with the trolley-wire when the car movesbackward, substantially as set forth.

5. A trolley shoe comprising a harp, a spider mounted in the harp, a pair'of arms 011 the spider, a frame mounted on'one arm of the spider, said frame having a trolley tread mounted thereon, a wheel carried. by the other arm of the spider, said tread frictionallyengaging the trolley wire to hold the said wheel out of engagement with thetrolley wire when the car. is moving forward and said tread moving horizontall'y forward to rotate the spider on its pivot tomove the said wheel into engagement with the trolley wire when the car moves backward, and stopson said frame and said spider to limit forward movement oftlie frame as the car moves backward, substantially as set forth.

6. A trolley shoe comprising a harp, a spider mounted in the harp, a pair of arms on the spider, a frame mounted on one arm of the spider, said frame having a trolley tread mounted thereon, a wheel carried by the other arm of the spider, said tread frictionally engaging the trolley wire to hold the said wheel out of engagement with the trolley wire when the car is moving forward and said tread moving horizontally forward to rotate thespider on its pivot to move the said wheel into-engagement withthe trolley wire when the car moves backward, cooperating stops and abutments on said spider and said harp to limit rear movement of the tread when the car is moving forward, substantially as set forth.

7. A trolley shoe comprising a harp, a spider pivotally mounted in the harp, a frame pivoted on the spider, said frame carrying a contact tread in slidable contact with and substantially parallel to the trolley wire during both forward and backward movement oft-he-car, and a roller on-the spider movable to engage-the trolley wire only during back- Ward movement of the car, substantially as set forth.

8. A trolley shoe comprising a harp, a spider pivotally mounted in the harp, a frame pivoted on the spider, the frame having a contact tread mounted thereon said tread being in engagement with and parallel to the trolley wire during both forward and backward movement of the car to maintain good electrical contact between the harp and the wire, and a roller positioned in the spider and movable to engage the trolley Wire to prevent buckling of the trolley pole when the car is moved backward, substantially as set forth.

In witness whereof, I have hereunto set my hand at Indianapolis, Indiana, this 29th day of April, A. D. nineteen hundred and thirty.

ANDREW L. HENRY.

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