US745127A - Trolley. - Google Patents

Description

PATENTED NOV. 24, 1903. H. M. WILLIAMS 6: J. W.- WOOMER. TROLLEY.

APPLIOATION FILED SEPT. 5, 1903.

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HARRY M. TVILLIAMS AND JOHN \V. WOOMER, OF PITTSBURG, PENNSYLVANIA.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 745,127, dated November 24, 1903.

Application filed September 5, 1903. Serial No. 172,117. (No model.)

To aZZ whom it may concern.-

Be it known that we, HARRY M. WILLIAMS and JOHN J. WOOMER, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Trolleys, of which the following is a specification, reference-being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in trolleys; and the primary' object of the invention is the provision of novel means to be engaged by the trolley- Wire in event of the wheel leaving the latter, whereby said trolley-wheel will be prevented from moving upward to such an extent as to engage with'cross-wires or the like.

Briefly described, the invention comprises the mounting of a pair of guard-arms on the trolley-pole at the base of the trolley-harp, which guard-arms are curved with their bow extending forwardly and their highest point lying normally slightly above the periphery of the trolley-wheel. On these guard-arms at each side of the trolley-pole are mounted rollers or auxiliary wheels adapted to receive the trolley-wire in eventof the trolley-wheel accidentally leaving the said wire, whereby the trolleyjs prevented from fartherupward movement until the wheel can be replaced upon the wire.

Novel features of construction are involved and will be hereinafter more specifically described and then particularly pointed out in the claims, and in describing the invention in detail reference will be had to the accompanying drawings, forming a part of this application, and wherein like numerals of reference will be employed for designating like parts throughout the difierent views, in which Figure 1 is a front elevation of our improved trolley-guard. Fig. 2 is a side elevation of the same, and Fig. 3 is a sectional view taken on the line 3 3 of Fig. 1.

In the accompanying drawings, 1 indicates the trolley-pole, 3 the trolley-wheel, and 2 the harp in which said wheel is journaled, all of which may beof the ordinaryform of construction.

Our improvement resides in the guard means, and this comprises a pair of guardarms at, one at each side of the harp. These guard-arms are on a curve with their bows extending forwardly, and the highest point egg s the guard-arms lies slightly above the level of the trolley-wire, as seen in Fig. 2. The guard-arms besides being curved also extend outwardly at an angle to the vertical, being considerably closer to the trolley-harp near the base of the latter than at the top of the arms. The shanks 5 of these arm are split and shaped into substantially semicircular straps 6 to embrace the trolley-pole, and these straps have their ends bent outward at right ends of the shanks. The guard-arms are bentinwardly at a point 3' ust above the wheels 10, as shown at 14, so as to insure the wire when it is engaged with the guard-arm being carried into engagement with the roller or wheel 10.

It will be observed that in event of the trolley-wheel accidentally being disengaged from the trolley-wire as the trolley-wheel is forced 8o upward, due to the action of the spring against the trolley-pole, the wire will engage with'one or the other of the guard-arms and be carried down into engagement with the roller 0r wheel 10 at the base of said arm,

where it will be retained until the trolleywheel is again placed in engagement with the wire. The circuit may be so arranged as tohave it closed or broken when the wire is in engagement with the rollers 10, as may be de- 9o sired. By this arrangement it will observed that the trolley is prevented from passing upward when disengaged from the trolley-Wire to a greater extent than to'engage the wire with one of the rollers 0r auxiliary wheels,

and danger of breaking the cross or guy wires is thereby prevented. 7

While we have herein shown and described the invention in detail as it has been practiced by us, yet it will be evident that vari- 10o These rollers or 70 wheels are held by collars 11 and 12 at the ous changes may be made in the details of construction ithout departing from the general'spirit of the invention.

Having fully described our invention, What we claim as new, and desire to secure by Letters Patent, is-

1. The combination with the trolley-pole,

the harp carried thereby and the wheel journaled in said harp, of a pair of curved'guardarms carried by the trolley-pole, and rollers or auxiliary Wheels journaled on said guardarms, substantially as described.

2. The combination With the trolley-pole, of a pair of curved guard-arms having theirends split and secured to said trolleypole, and rollers or wheels mounted on said guard-arms at each side of the trolley-pole, substantially as described. 4

3. In a trolley-guard, the combination with HARRY M. WILLIAMS. JOl-IN -W. WOOMER.

Witnesses:

H. O. EVERT, A. M. WILSON.

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