US1028189A - Spring-joint for trolley-poles. - Google Patents

Description

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SPRING JOINTIOR TROLLEY POLES. APPLICATION FILED JUNE 10, 1911.

1 ,028189, Patented June 4, 1912.

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R. P. COLEMAN.

. I SPRING JOINT FOR TROLLEY POLES.

APPLICATION FILED JUNE 10, 1911.

1,028,189. I I Patented June 4,1912.

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ROBERT F. COLEMAN, OF PHILADELPHIA, PENNSYLVANIA.

SPRING-JOINT FOR TROLLEY-POLES.

Specification of Letters Patent.

Application filed June 10, 1911.

Patented June 4, 1212. Serial No. 632,386.

To all whom it may concern Be it known that I, ROBERT F. COLEMAN, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Spring-Joint for Trolley- Poles, of which the following is a specifica tion.

This invention relates to an improvement in trolley poles.

The primary object of said invention is to provide a trolley pole with a resilient joint adjacent its head which will assist in the replacing of the head on the wires when the same become accidentally displaced.

A further object of the invention is to so support the trolley wheels that the shock occasioned by the contact of said wheel with the wire support will be effectually taken up, the cushioning of the harp being accomplished without the displacement of the wheel.

In the drawings :-Figure 1 is a side elevation of the harp. Fig. 2 is a front elevation. Fig. 3 is a transverse section. Fig. 4 is a side elevation of a slightly modified form of harp. Fig. 5 is a front elevation of the harp shown in Fig. 4, and Fig. 6 is a transverse sectional view of said harp.

In the drawings, 10 designates the trolley pole which extends within the tubular extension 11 of the harp 12. The harp terminates in the bifurcated end portion 13 and pivotally supported by said harp is a forked member 14 which supports the wheel 15. This forked member 14 consists of the arms 16 and 17 which are formed with cars 18 through which the pivot pin or shaft 19 passes, the ears being formed with cut away portions 20 which allows the same to accommodate themselves to the end portions of the support 12. The ears are connected by a web 21 which is formed with a plurality of parallel plates 22 and 23, this web either being formed integral with said ears or secured between the same, the ears being provided with elongated slots 24 shown in dotted lines in Fig. 2, said slots receiving the transversely disposed pin 25 which is rigidly supported by the harp 12. A bolt 26 extends through an aperture 27 formed in the plate 23 and interposed between said plate and the end 28 of said bolt is a coil spring 28, attention being called to the fact that a flat spring might be substituted in lieu thereof. The bolt 26 passes through the opening 27 and terminates in an eye 29 which embraces the transversely disposed pin 25.

In Fig. 2 the device is shown in its normal position with respect to the wire, the same traveling in the direction indicated by the arrow. When wheel 15 contacts with an obstruction the same will be forced to the posit-ion shown in Fig. 3, swinging on the transversely disposed shaft 19, the plate 23 compressing the spring 28 allowing the wheel to pass over the obstruction. As soon as the wheel has passed over the obstruction the same will assume the position shown in Fig. 2, the wheel 15 again being brought in contact with the wire, the spring returning said wheel to its normal position attention being called to the fact that the harp is supported by the bifurcated member 12, the spring contacting with the plate 23 to force the wheel 15, supported by the arms 14 and 16 in contact with the wire. Attention is called to the fact that the spring 28 returns the wheel 15 to the wire as soon as the same passes over the obstruction, and before the same is out of alinement with the wire.

In the form shown in Figs. 4, 5 and 6 the forked support is bifurcated as in the preferred form, its bifurcated end pivotally supporting a fork 30 which terminates in the reduced extension 31, the extreme end of this extension 31 lying between plates 32 and 33 formed integral with the support 29 and interposed between said end and the plate 33 is a coiled spring 34 which nor mally holds the fork in the position shown in Fig. 5. It will be noted, however, that if the wheel15 meets wit-h an obstruction the fork will assume the position shown in Fig. 6, the terminals 31 of the fork compressing the spring 34 which, as soon as the wheel passes over the obstruction, will force the same into the position shown in Fig. 5.

It will be noted that a device of this character will effectually relieve the trolley wheel and its support from the shocks occasioned by the contact of the same with the supporting hangers and in addition to taking up the wear thus occasioned, attention is called to the fact that as soon as the wheel passes over the obstruction which has caused its depression, said wheel will be immediately returned to the wire, the wheel and wire only being out of contact during the contact of said wheel with the obstruction.

What is claimed is 1. A trolley harp comprising a bifurcated support, a fork pivotally supported between the bifurcations of said support, said fork being formed with slotted extensions, a pin passing through the slots in said extensions, said pin being rigidly supported by the bifurcations of said support, an apertured plate supported by said fork, a bolt secured to said pin and extending through the aperture in said plate and a spring coiled around said bolt, said spring contacting with said plate and the head of said bolt.

2. A trolley harp comprising a bifurcated support, a fork pivotally supported between the bifurcations of said support, said fork being formed with slotted extensions, a pin rigidly supported by the bifurcations of said support, said pin passing through the slots in said extensions, and a resilient connection between said pin and said fork.

3. A trolley harp comprising a bifurcated support, a fork pivotally supported between the bifurcations of said support, said fork being formed with slotted extensions, a pin rigidly supported by said bifurcations and arranged to extend through the slots formed in the fork, a plate formed integral with said fork and resilient means for normally spacing said plate and said pin.

4. A trolley harp comprising a bifurcated support, a fork pivotally arranged in the bifurcations of said support, said fork be ing formed with slotted extensions, a pin supported by said bifurcations and arranged to extend through the slots formed in said fork, a plate disposed at right angles to the slotted extensions of said fork and resilient means for normally spacing said pin and said plate.

5. A trolley harp comprising a bifurcated support, a fork pivotally supported between the bifurcations of said support, said fork being formed with slotted extensions, a pin passing through the slots in said extensions, an apertured plate supported by said fork, a bolt secured to said pin and extending through theaperture in said plate and resilient means carried by said bolt for normally spacing said pin and plate.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two witnesses.

ROBERT F. COLEMAN.

lVitnesses D. R. MILLER, ANNA COLEMAN.

Copies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

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