US637812A - Trolley. - Google Patents

Description

No. 637,8l2. Patented Nov. 28, I899.

r. H. MERRILL & F. P. woonsoma.

T B O L L E Y.

(Application filed my. 20, 1899.;

(No Model.)

Inventor's LpMM/W, H v

T Vifizesesees:

UNITED STATES PATENT @FFICE.

FRANK H. MERRILL AND FRANK P. WOODSOME, or PORTLAND, MAINE.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 637,812, dated November as, lees.

Application filed March 20, 1899. $eria1No. 709,770. (No model.)

To all whom it mayconcern:

Be it known thatwe, FRANK H. MERRILL and FRANK P. WOODSOME, citizens of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Trolleys; and we 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.

Ourinvention relates to improvements in trolleys and is designed especially to be applied to the trolley-base, so as to prevent the trolley-wheel from losing the wire through the vertical vibration of the trolley pole, which usually occurs when the car is running at a high rate of speed or when it takes curves and switches.

It consists of a pivoted yoke with diverging arms suitably attached to the base of the trol ley-head, the yoke being so hung as to allow the diverging arms to extend upwardly on each side of the harp and when the trolley is in contact with the wire to extend above the same, means for keeping said yoke and diverging arms in an upright position, and in certain other details of construction, which will be hereinafter more fully set forth and described.

In the drawings herewith accompanying and forminga part of this application, Figure l is a side elevation of our improved device attached to the trolley-head, the dotted lines showing the position of the arms when forced down by a switch or supporting-wire. Fig. 2 is a rear end elevation of our improved device. Fig. 3 is a ,detail showing the means of attaching our improved arms to the trolley-head. Fig. 4 is a detail of means employed by us to prevent the arms from having too much of a forward movement.

Same letters of reference refer to like parts in all the figures.

In said drawings, A represents a trolleyhead having a suitable shank B, adapted to be fitted into the ordinary trolley-pole in any of the well-known ways. Mounted in the harp C of the trolley is a suitable trolleywheel D. Attached to the base of the trolley above the shank is a clamp-plate E. This plate is made in two sections, as seen in Fig.

3, and is provided with a rectangular opening F, so as to allow the shank of the trolleyhead to be inserted therein. In order to have the clamp fit tightly above the shank and, further,to thoroughly insulate the clamp from the trolley, we fill the rectangular opening with some insulating material, as shown at G in said Fig. 3. Both sections of the clamp are provided with screw-holes H, which register with each other, and bolts I to set one plate upon the other and compress them against the shank. Made integral with one of the members of the clamp is a curved bracket J, provided with a T-post- K on its free end, its end being provided with sockets L for the reception of pins M. Pivotally attached to the -T-post by means of the pins M is the yoke N, provided with diverging arms 0 anda weighted base P. 7 Our object in making the base portion weighted is to overcome the tendency of the diverging arms to assume a position other than a vertical one. These diverging arms extend upwardly and above the rim of the trolley-wheel and serve to prevent the trolley from leaving the wire. The upper part of the arms are made to flare outwardly, so as to easily receive the trolley-Wire when the trolley is being placed in position and are provided with an overhang Q on their inner sidethat is, the side nearest the trolley-wheel-which overhangs and extends a short distance over the rims of the wheel. Our object in providing the arms with this overhang is to prevent the trolleywire from getting between the wheel and the arms, should by any chance the wheel leave the wire, and binding. In order to prevent the yoke from moving too far forward and, further, to assist in holding the yoke vertical, we provide the T-post with a lip R, extending longitudinally across its upper side, and the arms with lugs S, as seen in Fig. 4: in the drawings. It will be seen that by this means the yoke and its diverging arms are prevented from swinging too far forward and catching on supporting-wires or switches. Attached to the lower part of the weighted base is an eye T, in which is fastened the trolleycord U. This gives an additional weight on the pivot-arm and, further, tends to keep the yoke and arms in an upright position and render it almost impossible for the arms to be in other than an upright position, exce"pt when they are going under switches and sup-- porting-wires.

Our improved device can be readily and easily attached to any trolley-pole, it only being necessary to bolt the clamp about the shank-,th'e yoke being adjusted on it"sbra'cke't before the device is attached to the trolley.

The arms normally extending above the wheel allow a vertical movement of some distance in the pole, thereby reducing to a.

minimum the chance of the trolley leaving the wire.

Having thus described our invention and its use, we claim- 1. In a trolley, in combination, a head, a Wheel mounted therein, an insulated clamp attached to the base of said head, a curved bracket made integral with said clamp and provided with a T post on its free end, a swinging .yoke with diverging arms and a weighted base pivotally attached to the arms of said T-post, lips on said diverging arms overhanging the rimof the wheel and means for limiting the forward movement of the yoke substantially as and for the purposes set forth. V l

2. In a trolley, in combination, a head, a

curved bracket attached to said headand insul-ated therefrom and having apost on its freeend, a yoke with diverging arms, andweighted base pivotally attached to said post, a lip on said post, lugs on said diverging arms adapted to contact withsaid lip to limit the forward movement of said yoke, sub- I stantially as and for the purposes set forth.

In a trolley, in combination, a head, a wheel mounted therein, a bracket rigidly at tached to said head andinsulated therefrom andhavin-g a T-post at its free end, a yoke having diverging arms and a weighted base

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