US974584A - Trolley. - Google Patents

Description

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G. A. MILLER.

TROLLEY.

APPLIoA'rIoN FILED 11.21, 1910.

Patented Nov. 1, 1910.

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BY Atovneys ,Y UNITED STATES", PnrENT OFFICE.

GEORGE A. MILLER, OF MCKEESPORT, PENNSYLVANIA.

TROLLEY.

Specification of Letters Patent.

Patented Nov. 1, 1910.

Application filed April 21, 1910. Serial No. 556,702.

` in Trolleys, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to trolleys, and the objects of my invention are to provide a trolley pole with a harp that willnormally retain the trolley wheel thereof upon a trolley wire or an electric conductor, and to furnish a harp with positive and reliable means for accomplishing the above result without interfering with trolley-wire hangers or the overhead construction of an electric railway system.

Further objects of my invention are to provide a harp with yieldable retainers that are simple in construction and durable, and to provide means `whereby one of the retainers can be shifted to release a trolley wheel from the trolley wire.

Still further objects of my invention are to eliminate the trouble at present experienced by trolley wheels becoming displaced due to the rapidity of a car when traveling around a curve, and to provide a retaining device of the above type that will be inexpensive to manufacture, free from injury by ordinary use and highly efficient for the purposes for which it is intended.

With the above and such other objects in view as may hereinafter appear the invention consists of the novel construction, combination and arrangement of arts to be hereinafter specifically described and then claimed.

Reference will now be had to the drawing, wherein:

Figure 1 is a front elevation of a trolley constructed in accorda-nce with my inven- 45 tion. Fig. 2 is a side elevation of the same. Fig. 3 is a plan. Fig. 4 is a longitudinal sectional view of the trolley, and Fig. is a cross sectional view of the trolley.

In the accompanying drawings the reference numeral 1 denotes a pole having the upper end thereof provided with a rectangular head 2 and riveted or otherwise secured to the head 2, as at 3, is a yoke 4 having lateral extensions 5 terminatlng in vertical bearings 6. The same rivets or fastening means employed for securing the yoke 4 to the head 2 also hold the lower ends 7 of harp arms 8, these arms having the upper ends enlarged, as at 9, and provided with open slots to receive a hub 11 adapted to revolubly support a trolley wheel 12. rl`he hub 11 is provided with a bore 13 rectangular in cross section and adapted to receive a rectangular pin 14, said pin having the ends thereof reduced and one end of the pin provided with a head 15, while the opposite end is screw threaded, as at 16, to receive a.

nut 17. The pin 14 is adapted to be supported by the vertical bearings 6 and in order that said pin can be easily placed in position, the bearings 5 are provided with large openings 18 in which are mounted bearing pieces 19.

Mounted upon the pins 14 are blocks 20 having circular heads 21 and adapted to telescope said heads are the barrels 22 of oblong retaining members 23. These members confront one another and have the faces thereof cut away, as at 24 to provide clearance for the wheel 12 and the remaining portions of said members are provided with longitudinal confronting grooves 25 adapted to provide clearance for a trolley wire or electric conductor (not shown). The ends of the members 23 are beveled or pointed, as at 26 whereby said members can easily contact with a trolley wire hanger and recede without injuring the hanger. The members 23 are normally held in engagement with each other by coiled compression springs 27 encircling the pin 14 within the barrels 22, said springs having the outer ends thereof bearing against the circular heads 21 of the blocks 20 and the inner ends thereof against the inner sides of the members 23.

The lateral extensions 5 of the yoke 4 are provided with transverse bearings 28 having hangers 29, and trunnioned in said hangers are rock shafts 30, said shafts intermediate the ends thereof being provided with outwardly extending cranks 31 to theV outer ends of which are attached cables 32. Upon the ends of the rock shafts are mounted arms 33 having the upper endsthereof hookshaped, as at 34 to engage outwardly extending pins 35 carried by a sectional band 36 clamped upon the barrels 22 and adapted to engage a peripheral fiange 37 carried at the outer` ends of said barrels, whereby when the cranks are pulled downwardly by the cables 32, the barrels 22 will be moved outwardly to carry the members 23 thereof outl of engagement and thus provide an opening for the passage of the trolley wire when it is desired to remove the trolley from the wire or electric conductor.

From the foregoing it will be observed that I have devised novel means for bridging or spanning a trolley wire above a trolley wheel, thus preventing the trolley Wheel from becoming accidentally displaced from the trolley wire due to any irregularities in the wire or the rapidity at which a car travels. The retaining members are so arranged that they can yield and clear a trolley hanger, frog, or other overhead construction, thus providing a device that can be used in connection with the present type of trolley systems.

What I claim, is:

1.v In a trolley, the combination with a trolley pole having the upper end thereof provided with a head, of a yoke secured to said head and having lateral extensions terminating in vertical bearings, harp arms connected to said yoke, a hub mounted in said harp arms, a wheel revolubly mounted upon said hub, a pin extending through said hub and adapted to be supported byl said bearings, spring-pressed barrels movably mounted upon said pin, retaining members carried by said barrels and adapted to engage each other, said members having longibearings, spring-pressed barrels movably,

mounted upon said pin, retaining members carried by said barrels and adapted to engage each other, said members having longitudinal grooves formed therein for the trolley wire, and means supported by said yoke and adapted to move said barrels to provide opening for the trolley wire when removing the trolley, said means including rock shafts, cranks carried thereby, and arms mounted' upon the ends of said shafts and adapted to move said barrels outwardly.

In testimony whereof I aIiX my signature in the presence of two witnesses.

GEORGE A. MILLER.

Witnesses I-I. C. EVERT, MAX H. SRoLovITz.

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