US683534A - Trolley. - Google Patents

Description

No. 683,534. Patented Out. I, l90l. E. A. WAKEFIELD.

TROLLEY.

(Application filed May 81, 1901.)

(No Model.)

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UNITED STATES PATENT GEETCE,

EDYVIN A. \VAKEFIELD, OF PELHAM, MASSACHUSETTS.

TROLLEY.

I SPECIFICATION forming part of Letters Patent No. 683,534, dated October 1, 1901.

Application filed May 31 1901.

To to whom it may concern:

Be it known that I, EDWIN A. WAKEFIELD, a citizen of the United States, residing at Pelham, in the county of Hampshire, State'of Massachusetts, have invented certain new and useful Improvements in Trolleys; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to trolleys for electric railways; and it has for its object to provide a construction wherewith it will not be necessary for the conductor to leave the car to swing the trolley from one position to another when the direction of the car is to be reversed, further objects and advantages of the invention being evident from the following description.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is a side elevation showing a car equipped with the present inven-v tion. Fig. 2 is a top plan view of the trolleystand with the two trolley-arms thereon. Fig. 3 is a detail view.

Referring now to the drawings, the trolleystand includes the usual turn -table plate 5, which, however, instead of being rotatable is fixed against movement, and on this plate are formed two upwardly-directed ears 6 and 7, having transverse alining' perforations, through which is engaged a pivot-bolt 8.

In the present instance there are employed two trolley- arms 9 and 10, at the lower ends or bases of which are formed perforations through which the pivot-bolt 8 is engaged, the bases of these trolley-arms lying in close relation and fitting snugly between the ears 6 and '7, said arms being both adapted for pivotal movement independently. Each trolley-arm is provided with a head 11, and in each head there is mounted a trolley-wheel 12,said Wheels being adapted for interchangeable engagement with the trolley-wire, depending upon the direction of progress of the car, and each trolley-arm is furthermore provided with a separate trolley-rope 13.

To hold the trolley-arms alternately in raised or operative position, a helical spring 14 is provided, and this helical spring is at- Sarial No. 62,674. (liomodeL) tached at its ends to the two trolley-arms at points slightly distant from their pivotal connections or mountings, the two arms lying normally at an obtuse angle and the spring tending to draw them together. Thus if one trolley-arm be drawn down to lie upon or close to the roof of the car the spring will be placed under tension and will act to hold the other arm in raised position with the trolley wheel in engagement with the trolley-wire, and if this raised arm be then drawn downwardly the spring will act to hold the other arm in raised position.

Spring-hooks 15 are mounted upon the roof of the car, at the ends thereof, and the trolleyarm that is not in use is drawn down and en gaged with the hook at that end of the car.

As is well known, the trolley sometimes leaves the wire and, standing erect, knocks against the supporting-pole arms or hangerwires and knocks them down, causing much damage and expense. To overcome this, it is necessary to relieve the spring of its tension when it reaches a position to hold an arm vertical or when the arm has reached a vertical position. For this purpose a sleeve 16 is slidably mounted on each of the trolleyarms and has a slot 17 therein, at the sides of which are perforated cars 18, and between these ears of each sleeve there is pivoted a hook 19, which when the stem thereof is at an acute angle to the trolley-arm projects inwardly through the slot of the sleeve and engages a recess 21 in the trolleyarm to hold the sleeve against sliding movement along the arm. \Vhen, however, the stem of the hook is moved to project at right angles from the trolley-arm, the bill of the hook is drawn from the recess in the arm and the sleeve may be slid along thefirm. This actual withdrawal takes place'before the stem of the hook has reached the position at right angles. Thus with one arm lying fiat and the other at an obtuse angle thereto the hooks are engaged with the arms and prevent movement of the sleeves thereon. Now the ends of the helical spring are engaged with the ends of the stems of thehooks, and when the operative arm jumps from the trolley and reaches a Vertical position the bill of its hook moves from the recess of that arm and permits its sleeve to slide in the direct-ion of the pivot of the arm, thus permitting the spring to contract to relieve it of its tension and the arm falls back and away from the wire. A finger 25 projects into the path of each of the 'arms and has a spring-stop26, against which the arm may strike should it tend to fall forwardly after the spring has been released, when the spring quality of the stop will cause it to throw the arm back to fall in the proper position.

The trolley ropes or cords pass through rings at the trolley-heads slidably and are attached to eyes in the sleeves for drawing the latter back to their operative positions.

What is claimed is- 1. The combination with two trolley-arms rotatably mounted upon a common pivot and adapted to lie at an angle to each other, of a spring connecting the arms at points above their pivot and adapted to hold the arms yieldably in close relation.

2. The combination with a vehicle having a trolley-stand, of separate trolley-arms pivoted upon the stand for movement toward and away from each other, a spring connecting the two arms and adapted to hold them yieldably in close relation, and means for engagement by each of the arms to hold it in reclinin g position to hold the other arm in raised position. v

3. The combination with two trolley-arms mounted upon a common pivot, and means for holding each of the arms in reclining position, of a sleeve slidably mounted on each arm, a latch for holding each sleeve against sliding movement, and a spring having its ends attached to the latches for drawing the arms toward each other, said latches being adapted for movement by the spring to release the sleeves from the arms when the arms are in close relation.

In testimony whereof I hereunto sign my name, in the presence of two subscribing wit nesses, on the 21st day of January, 1901.

EDWIN A. WAKEFIELD.

Witnesses:

MARY A. KEITH, LODICA KEITH.

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