US747106A - Trolley. - Google Patents

Description

No. 747,106. PATBNTED DEC. 15, 1903.

1v1. J. WILSON.

'TROLLEYi APPLoATIoN FILED SEPT. 2, 1902.

B0 MODEL.

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Patented December 15, 1903.

MILFORD I. WILSON, OF PAINESVILLE, OHIO.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 747,106, dated December 15, 1903.

l' Application filed September 2,1902. Serial No. 121,722. (No model.)

To all whom it may concern.-

Be it known that I, MILFORD J. WILSON, a citizen of the United States,residin g at Painesville, in the county of Lake and State of Ohio, have invented a certain new and useful Improvement in Trolleys, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

The object of this invention is to provide a trolley which shall be self-oiling, in which the electric contact shallbe of the highest possible efciency, which shall be simple to construct, durable in service, andeasily and cheaply repaired when necessary.

The invention may be Vsummarized as consisting of the combinations of parts to the above end, as hereinafter more fully explained and as deni'tely set outin the claims.

In the drawings which clearly illustrate my invention, Figure l is a side elevation, and Fig. 2 is a plan, each of these views being partly broken away to show the cavity in the harp. Fig. 3 is a section 'through the axle and set-screws. Fig. is a transverse section on the line 4 4 of Fig. 3. Fig. 5 is a perspective view of the axle alone.

Referring to the parts by letters, A represents the harp, which has a portion et adapted to connect with the pole and a pair of arms ct a. In the arms is a cavity a?, which connects across the harp, being of a U form. This cavity is adapted to carry oil inserted through an opening in the harp, which is thereafter closed by the fscrew d5. The axle is carried by the harp and is adapted to receive oil therefrom, as hereinafter explained. The axle is composed of an inner tube B, made of copper, and a pair of sleeves B, which snugly embrace the copper tube and extend inward from each direction. The ends of the bore of the copper tube are closed by suitable screw-plugs b. Through the cylindrical wall of this tube are formed oilopenings b', communicating` withlargeropeuings b2 in the sleeves B'. These latter openings preferably carry felt b3 or other oil-ab sorbing material. The axle is held in place by set-screws D, which screw through the harp, taking into cavities in the sleeves B. Extending upward along the axes of these set-screws are passage-ways d, communicating by a cross passageway with the sides of the screw. Openings b5 through the sleeves B and the copper tube aline with the openings d. Now near the forward end of the harp there is formed across the cavity a2 a wall or partition a3, which may be cast integrally with the harp and which does not reach to the 'extreme height of the cavity, thus leaving a smaller communicating cavity a4 in the forward end of the harp surrounding the setscrew D.

From the above-described construction it results that whenever the trolley-pole is drawn downward intoa substantially horizontal position the oil in the cavity a2 passes. into the cavity a4, where it is retained by the wall as when the pole is elevated. This oil gradually passes through the openings cl into the bore of the tube B and thence through the openings b to the felt b3. The trolley-wheel E is journaled on the inner portions of the sleeves B,as shown, and is thus continuously oiled by the felt b3.

Through the hub e of the trolley-wheel E is an opening e', into which extends a curved spring F,'which bears upon the central enlarged portion b4 of the copper tube. The spring is snugly held against the copper tube by having its outer end'taking over a lug e2, formed on the hub, through which lug extends a pin e3 for holding the spring F in place. vBy making the tube B of copper I obtain the best possible contact between it and the spring F. Less pressure is required on the spring than if it bore upon steel, and hence the wear is not so great. The conductivity of the copper insures the current being carried from the wheel to the harp with the least possible loss.

In the operation of the trolley the steel sleeves B wear out before the copper tube, the spring F, or the hub e. These sleeves may be easily removed from the copper tube and cheaply replaced. By having the enlargement b4 on the copper tube it will wear a very long time. Thus the addition of a few extra pairs of steel bushings B during the life of the trolley will allow the axle to last for an exceptionally long time.

I claiml. The combination of a trolley-harp having a pair of arms, and an axle extending between, and non-rotatably secured in said arms, said axle consisting of a central part B having an annular enlarged portion b4, and the sleeves B B which closely embrace said tube on opposite sides of said enlarged portion thereof, with a trolley-wheel rotatably mounted upon the sleeves B between said harp-arms, an electrical contact device carried by said wheel in contact with the enlarged part b4 of the part B, substantially as and for the purpose speciied.

2. The combination of a trolley-harp having a pair of arms, a tubular axle B adapted to hold lubricating-oil, extending between and non-rotatably secured to said harp-arms, two sleeves B' B non-rotatably secured upon said tubular axle with an intervening space between their proxim'ate ends, there being oil-delivery openings through said tubular axle and the tubes B', a trolley-wheel between said harp-arms and rotatably mounted upon said sleeves B B', and a spring contact device carried by said wheel in contact with that part of the tubular axle B between the proximate ends of said tubes B B', substantially as and for the purpose specified.

3. The combination of a trolley-harp having a pair of arms in which are oil-receptacles, and a tubular axle extending between and non-rotatably secured in said arms, there being holes through which the bore of said axle is in communication with both oil-receptacles in the harp-arms, said axle consisting of, first, a central tube B having, about midway between its ends, an enlarged portion b4 and having also the oil-openings b', and, second, sleeves B/ which embrace the tube B on opposite sides of the enlarged portion b4,which tubes have the oil-openings b2, with a trolleywheel rotatably mounted upon the sleeves B between the harp-arms, an electrical contact device carried by the wheel in contact with the enlarged portion of the tube B, and plugs closing the ends of said tube, substantially as and for the purpose specified.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

MILFORD J. WILSON.

Witnesses:

ALBERT H. BATES, B. W. BROCKETT.

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