US611367A - Trolley-pole - Google Patents

Description

Patented Sept. 277 |898. A. M. MEREDITH.

TROLLEY POLE.

(Application filed Mar. 31, 1897. Renewed July 16, 189B.)

2 Sheets-Sheet I.

(No Model.)

WIT NESSES ATTORNEY No. 6||,367. Patented Sept. 27, |898.

A. M.`MEREDITH.

TROLLEY POLE.

(Application led Mar, 31, 1897. Renewed July 1.6, 189B.)

2 Sheets-*Sheet 2.

(No Model.)

lNyENroR.

WXTNESSES ATTORNEY TH: Nnms Packs co. novo-umm wAsHmcTon, D c.

Nrrnn STATES muon.

BY DIREOTAND MESNE ASSIGNMENTS, TO GEORGE GRANT ARMOR OF BALTIMORE, MARYLAND.

TROLLEY-POLE.

SPECIFICATION forming part of Letters Patent No. 611,367, dated September 2*?, 1898. Application tiled March 3l, 1897. Renewed July 16, 1898. Serial No. 686,135. (No model.)

To a/ZZ whom t may concern.-

Beit known that I, ALBERT M. MEREDITH, a citizen of the United States, residing in the cityand county of Philadelphia,State of Pennsylvania, have invented a new and useful Improvement in Trolley-Poles, which improvement is fully set forth in the following specication and accompanying drawings.

My invention consists of animproved oonstruction of trolley-pole and of the manner of mounting the trolley-wheel thereon, whereby the latter can move axially with respect to said pole and is also capable of a rolling or tilting movement relative thereto.

It also consists of novel details of construction, all as will be hereinafter fully set forth, and pointed out in the claims.

Figure l represents a side elevation of a trolley-pole embodying my invention. Fig. 2 represents a longitudinal section of Fig. l, showing the manner of mounting the trolleywheel on the pole. Figs. 3 and 4 represent, respectively, a side elevation and longitudinal section of another embodiment of the principle of my invention, showing a different manner of retaining the restoring-spring in position.

Similar letters of reference indicate corresponding parts in the figures.

Referring to the drawings, A designates a trolley arm or pole, the same being preferablyhollow, and in the upperportion thereof having the extension or journal B of the plug B mounted therein, it being noted that said journal is of somewhat less diameter than its bearing in the upper portion of the pole A, whereby a rocking or rolling movement of the trolley-wheel relative to the pole is permitted.

C designates a shell or collar within which the plug B is secured by means of a pin or other fastening device D, said shell terminating in the bifurcated portion or ears E, on which the trolley wheel or roller F is mounted, electricity being conducted therefrom to the car-motorin the usual manner, it being noticed that said shell or collar constitutes the' upper section of the trolley-arm.

G designates a coil-spring employed, the upper end II of which is held in position by means of the fastening device D, while the lower end J of the spring is secured in place by means of the device K, it being noted that a portion of said spring encircles both the shell C and the adjacent portion of the trolley-pole, so that the relative position of the shell C and the trolley-wheel carried thereby to the pole is always assured.

The construction seenin Figs. 3 and 4 is substantially the same as already described, attention being called, however, to the manner of holding in position the upper portion of the spring G. In Fig. 4 I provide the shell C with the screw-threads or annular grooves, which serve to hold in position the upper portion of the spring G, while the lower portion of the latter is secured by the fastening device K, the construction seen in Fig. 4 being preferable in some instances. Since the shell C engages the spring G, they will turn together with less liability to jerk'.

The operation is as follows: When the trolley is in service, the upper section O of the pole rolls or rocks on the adjacent extremity of the lower section, the spring G normally holding the wheel F in the proper relative position to said pole. The journal B plays freely in the pole and prevents disconnection of the sections ofthe latter should there be excessive strain on the upper section. The upper section is further enabled to have an axial movement relative to the pole A,which is very desirable when rounding curves 'or for other reasons, the spring serving to restore the trolley-wheel to its proper relative position in every instance.

It will thus be seen from the foregoing that by my construction the fork in which the trolley-wheel is carried is capable of a rocking or rolling movement and also of an additional axial movement.

It will of course be evident that, if necessary, means may be employed to `prevent stretching of the spring.

I-Iaving thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-- y l. A trolley-pole in sections, and a spring connecting said sections and. allowing the end of one section to roll upon the adjacent section.

2. A trolley-pole having mounted in the upper extremity thereof the journal B, the latter being of reduced diameter, the collar C from which said journal depends, an ear carrying a trolley-Wheel supported on said collar, a spring -coiled around said collar and pole, and means for securing the ends of said spring to said collar and pole respectively.

3. Atrolley-pole having mounted in the upper extremity thereof the journal B, the collar C to which said journal is secured, an ear carrying a trolley-Wheel supported on said collar, a series of grooves in the latter, and a spring coiled around said collar and pole, the upper portion of said spring engaging said grooves and the lower portion thereof being suitably secured to said pole.

4. Atrolley-pole having mounted in the upper extremity thereof the journal B, the collar C to Which said journal is secured, an ear carrying a trolley-Wheel Which is supported on said collar, a series of screw-threads on the latter, and a spring common to said collar and pole, the upper portion of said spring engaging said screw-threads- 5. The combination of a trolley-pole in sections, and a coil-spring connecting said sections and allowing the end of one section to roll upon the adjacent section.

6. A trolley-pole in sections, the upper section thereof having a trolley-Wheel mounted therein, a coil-sprin g encircling said sections, and means for securing each extremity of said spring to the adjacent section, whereby the upper of said sections is permitted to have an axial and also a rolling movement relative to the lower section.

ALBERT M. MEREDITH.

Witnesses:

WM. C. WIEDERSHEIM, C. D. MGVAY.

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