US1548422A - Trolley wheel - Google Patents

Description

Aug. 4, 1925.

G. s. MOORE TROLLEY WHEEL Filed May 31, 1925 FTQ-L Giles S Moore Patented Aug. 4, 1925.

i UNITED STATES, PATENIoFFicE.

GILES s. MOORE, or INDIANAPOLIS, INDIANA, AssIGNoR- 'ro TROLLEY 'stron-WHEFL COMPANY, OF INDIANAPOLIS.' INDIANA, A CORPORATION OF INDIANA. l

TROLLEY WHEEL.

f Application led May 31, 1923. Serial No. 642,570.

' T0 all 'whom t may concern:

Be it known'that I, GILns S. Moons, :1 citizen of the UnitedStates, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements inTrolley Vheels, of which the following is av specification.

`My said invention relates to a trolley having a sliding contact shoe for engaging the wire during the ordinary operation while the trolley is moving in a forward direct-ion together with the car by which it is carried. Such a sliding contact shoe has been found to have many .advantages over the ordinary trolley wheels. Some of these advantages are that the damage to the wire due to arcing is lessened as arcing takes place to much .lessextent with a shoe than with a wheel, less current is lost due to such arcing, the shoe needs no greasing, the parts need not be renewed as often as in the case 'of wheels, there isa more steady flow of current tofthe car and less resistance to over come between the wire and the car, less current is waster in winter-due to frost and sleetand less damage is done -to the wire. Since it is not necessary to oil the shoe the danger incident to walking over the roof of the car for this purpose in cold weather is done away with, as well as .the fdamage done to the car roofs by walking on them.

There is less vibration, the lights are moreV steady and the car rides more evenly and with greater comfort to passengers. There is also less expense of wear and maintenance in various respects and owing to various circumstances such as that the shoe does not collect copper 'from the wire, does not wear ears in overhead construction and does not crystallize the wire in spots as a wheel does thereby causing the wire to break. Many other advantages could be stated but the aboveY are believed to provide `a sulicient illustration of the importance of this development in trolley construction.

Referring to the accompanying drawings, which are made a part hereof and on which similar reference characters indicate similar parts,

Figure 1 is a side elevation of my device partly in section, with the trolley moving in the direction of the arrow, i. e. in a forward direction,

`Figure 2, a similardview showing the trolley moving in the opposite direction, i. e. in a rearward direction, and

Figure 3, a section on line 3 -3 of Figure 1.

In the drawings reference character 10 in-` dicates a harp supported on a pole as is usual and having forks 11 which are oonnected at the upper end by a bolt 12 forming a pivot for a bracket 13j The bracket carries a shoe 14 at the end which is normally uppermost, this shoe being made of sheet metal or other convenient material and having upstanding flanges 15 at opposite sides curving outward at their upper extremities. A removable wear plate 16 is located on the shoe between the flanges 15 and is bent downward at its front end to :cause its under surface to `correspond to Vthe upper face of the curved part 17 of the shoe. At the other end the shoe terminates abruptly and the wear plate has a depending flange or shoul-` der 18, the forward facev of which engages,

the rearend of the shoe while the rearward face. extends substantially in a common plane with the axis of a bolt 19 carried between forks at the normally lowermost end of the bracket 13. Any conventional or desirable l screw 20, the head of which is located in a counter-sunk opening in the shoe. The

shape of the contacting faces oftheshoeand'j plate insures that the holes in the two parts will register when the parts are fitted together.

VThe pivot 19. between the forks of the bracket, which bracket `is here shown as forked at each end and integral in the middle but whichmay consist of two separate side pieces if preIerred, provides means for rotatably sup-porting a trolley wheel 21 which is flanged as usual at 22 and is so positioned relatively to the shoe that the fla-nge 18 on forks of the harp, this cross-bar being engaged in one position of the bracket 1 3 by the flanges of the wheel 21 and in the other extreme position by the under or rear face ofthe shoe 14. The cross-bar 24 may obviously be replaced by lugs on the two forks of the harp or by a single lug or any equivalent construction.

In the operation of the device it will be evident that the sliding shoe will contact with the trolley wire whenever the trolley is moving forward whereas when the car begins to move in reverse ydirection the bracket will tilt and cause the wheel to come in contact with the wire. At such times the bar 24 will act as a stop to limit the tilting movement of the bracket whereby the wheel will engage .the wire in the position shown in Figure 2. When the rearward movement of the car is again changed to a forward movement the resistance between the wheel and the wire together with the action of gravity will cause the bracket to tiltthereby moving the wheel toward the position shown in Figure 1, the shoe also .moving toward the position there shown.

' nThe friction Vbetween the wheel and the rear .45 the shoe.

end of the shoe on the one hand and ,the

Wire on the other hand augmentsthis ltend-v ecomes lworn another plate can readily be inserted in its place and` because of the structure illustrated andwdescribed this will be a very simple matter requiring but little time to locate the wear plate relatively to It will also be notedl that the bar 2,4 acts as a stop to limit the movement of the bracket toward the position of Figure 1l and that it, may'eXert a braking laction on the wheel to stop its rotation at ythis time.` Thewheel is herel shown as having a plain surface but I contemplate applying removable tread sections thereto] in some suchmanner as that described in Patent No. 1,382,664, of June 28, 1921 to Otto Moore. 1

It will be obvious to those skilled in the art that many changes may be made in the details of construction of my device without departing from the spirit of the invention and` therefore I do not limit myselfto the construction shown in the drawat its rear end sloping abruptly toward said' wheel and the aXis of the wheel beingknorma-llyV directly beneath said rear end, substantially asset forth.

2. In a trolley, a harp, a bracket pivoted to the harp, a member on `the bracket arranged to have Vsliding contact with the wire during movement of the device in one direction, and a wheel on the bracket arranged to engage the wire on movement in the opposite direction the flattened rear end ofthe sliding Contact member lying in a plane passing approximatelythrough the axis of sa'ic wheel, substantially as. set forth. p.

3. In a trolley, a harp, a bracket Vpivotally supported on the harp,"a shoe fixed to the bracket, a wheel pivotally supported by the bracket, and common'means on the harp for engagement by the bracketand the wheel to limit the movement of the bracket in either direction, substantially as Set forth.

4. In a trolley, a harp, a`bra'cketpivotally supported on the harp, a4 shoe fixed to the bracket-,a wheel pivotally supported by the bracket, and a cross-bar between the forks of the harp engageable alternately the shoe and the wheel for limiting the movement of the bracket, set forth.

5. In a trolley, asliding contact shoe', a removable wear plate, means for securing the plate on the shoe, means for accurately positioning the plate on the shoe, similarly curved surfaces at one end of said members, a flange at the other end,of Onemember adapted to abut againstl the adjacent end of the other, and means to fasten the members in such relation,` substantially as set forth. l

In witness whereof, I have hereunto set my hand and seal at Indianapolis, Indiana this 29th day of May, A. D. nineteen hundred and twenty-three.

GrILES S. MOORE.

Titnesses i E. W. BRADFORD, M. L. SHULER.

substantially as af si

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