US1247968A - Trolley. - Google Patents

Description

R. C. KISSINGEPI.

TROLLEY.

APPLICATION man 9m26.191s.

l 996@ miente@ Nom 27, MRA

nozsnzar c. Krsslnenn, or DAYTON, onro.

TROLLEY.

Specification of Letters Patent.

Patented N ov. 2r?, 191'?.

Application led. December 26, 1916. Serial No. 139,009.

To 'all 'whom t may concern.'

Be it known that I, ROBERT C. Krssnvcnn, citizen of the United States7 residing at Daytom in the county of Montgomery 'and State of Ohio, have invented certain new and useful Improvements in Trolleys, of which the following is a specification.

My invention relates to electrically propelled vehicles and particularly to improvements in trolleys for electric traction cars.

The object of the invention is to simplify the structure as well as the means and mode of operation of such devices whereby they will not only be cheapened in construction but will be more efficient in use, easily engaged with and disengaged from the trolley harp,rof maximum durability and unlikely to get out of repair.

Further objects of the invention are to provide improved means for electrically connecting the trolley wheel with the harp ini dependent of the trunnion or shaft, where-by any tendency of the current to arc and thereby burn the bearing is obviated.

A further object is to provide means for automatically taking up the side play to prevent rattle or chatter of the wheel and to provide improved means for securing the wheel within the harp .together with improved lubricating means therefor. Y

With the above primary and other inci dental objects in view, as will more fully appear in the specification7 the invention consists of the features of construction, the parts and combinations thereof, and the mode of operation or their equivalents, as hereinafter described and set forth in the claims.

Referring to the drawings, Figure 1 is a side elevation of the assembled device. Fig. 2 is a detail sectional view thereof. Fig. 3 is a side elevation of the wheel and contact spring removed from the harp. Fig. 4 is a detail perspective view of the contact spring. Fig. 5 is a detail side view of one arm of the trolley harp.

Like parts are Vindicated by similar characters of reference throughout the several views.

In the drawings7 1 is the trolley wheel revolubly supported within the harp 2 which is carried upon the end of the trolley pole 3 in the usual manner. The wheel isprovided with the usual peripheral 4groove 4 having angular sides within which the trolley wire or cable is engaged. In the present instance the wheel is provided with an enlarged hollow hub 5, the recessed interior of which forms a reservoir 6 for lubricating material. Within the hub 5 there is located a bushing 7 which maybe of any suitable material or construction. There are at present upon the market numerous anti-friction bearings or bushings any of which may be utilized in the present construction. In the drawings there has been shown a simple form of metallic bushing having ducts or ports 8 through which the lubricant is admitted to the shaft or trunnion 9.

The shaft or trunnion 9 is screw threaded at its opposite ends as at 1() for the reception of retaining nuts 11. The screw threaded ends of the trunnion or shaft are fiattened on their opposite sides as at 12 for engagement within the slotted extremities of the harp 2.

The harp 2 comprises the usual sleeve 13 within which the pole 3 projects and from the upper end of which extend the parallel spaced arms 14. The arms 14 are slotted or bifurcated at their extremities as shown at 15 for the reception of the fiattened extremities 12 of the shaft or trunnion 9.

On the outer faces of the arms 14 there are formed pockets or recesses 16 concentric with the shaft or trunnion 9 when engaged within the bifurcated extremities of the arm. The pockets or recesses 16 correspond in size with the retaining nuts 11. The construction is such that when the retaining nuts 11 are in place upon the shaft or trunnion they are inclosed within the recesses or pockets 16 as shown in Figs. 1 and 2 and being of greater diameter than the width of the slot 15 they prevent the disengagement of the trunnion or shaft from within the bifurcations of the arms. Thus it will be seen that the trunnion is not held in engagement with the arms by the friction or clamping action of the nuts 11 but by engagement of said nuts within the recesses or pockets 16.

Located in the lateral faces of the hub 5 are concentric grooves or channels 17 in which are located helical contact springs 18. These contact springs are of peculiar formation, the coils being attened transversely to the axis of the spring as shown in detail in Fig. 4. Thus the springs have the ap pearance of a flat bar or strip of material coiled edgewise. The springs 18 are compressed within the channels or grooves 17 y provided.

intermediate the hub 5 of the Wheel and the inner faces of the arms 14 of the harp. The harp arms 14k are provided With disklike heads 19 against which the Contact springs 18 bear. springs 18 are bent at right angles as shown at 20 for engagement With the Slot 0r bifurcation 15 of the arms to hold the springs against rotation in unison with the Wheel. The resiliency of the springs 18 holds such 'springs firmly in contact With both the Wheel and the harp While permitting the Wheel to rotate independent thereof.

lLubricating ducts or ports 21 leadv from thev reservoir G to the channels or grooves 17 to provide lubrication for the bearings of the springs 18 upon the bottoms of the grooves or channels 17. The reservoir 6 is charged With lubricant through an opening provided With a suitable closure screW 22. The construction is such that current Will pass from the trolley Wire or cable through the Wheel and thence through the Contact springs 18 to the harp, thus providing a path for the current independent of the shaft or trunnion 9. The springs 18 Will maintain uniform contact With the Wheel at all times, any variation of the Wheel and harp being compensated for by the resiliency of the springs. The springs, being located upon opposite sides of the Wheel, balance one another and prevent any side play or chatter of the Wheel. It has been found in practice that When the current is conducted from the Wheel through the trunnion or shaft to the harp, as the Wheel Wears and becomes more or less loose upon its bearings there is a tendency'for the current to arc intermediate the Wheel and shaft thereby carbonizing the lubricant and burning the bearings causing the Wheel and shaft to Wear out very rapidly. This difficulty is obviated in the present instance by providing a path for the current from the Wheel to the harp separate and independent ofthe shaft or trunnion. The peculiar formvof the helical spring provides a Wide fiat bearing of the spring upon both the Wheel and the harp, insuring perfectk contact and reducing the Wear of the parts to a minimum. The WearingV of the parts is further minimized by the lubrication of the spring bearings as described.

To insure the uniform distribution of the lubricant throughout the length of the shaft,

the longitudinal groove or depression 23 is The shaft or trunnion'S) is prevented from rotating by the engagement of its ia't extremities l12 Within the slotted eX- tremities 15 of the harp 5.` The Wheel is readily disengaged from the harp by loosening the nut-s 11 and pulling the Wheel and shaft or trunnion from the harp through theslots 15. This permits the Wheel to be easily and quickly removed or replaced.

The outer ends of the vdipole, While adjacent thereto a shoulder 26 To secure t-he harp upon the trolley pole 3 there are provided set screws 24 one of which carries at its end projecting stud 25 to engage in a hole in the side of the trolley bears upon t-he material around the hole in Which the stud is engaged, to clamp the pole in position. vThus the harp and pole are interengaged not only by the clamping action of the set screW butby the projection of the stud into the opening of thepole. It is to be noted that the flange forming the pocket 16 is beveled on its outer face, and that the harp is provided With a rib 27 extending flush with the top of the pocket. The nuts 11 being seated `flush With the top of thepocket Will not afford a place for the cable to lodge in event the Wheel is thrown off the cable. In such case the cable is guided past the nuts 11 by the rib 27.

` From the above description'it Will be apparent that there is thus provided a device of the character described `possessing Vthe particular features of advantage before enumerated as desirable but Which obviously is susceptible of modification in its form, proportion, detail construction,V or arrangement of parts, Without departing from the principle involved or sacrificing vantages. Y

Vhile in order to comply With the statute the invention has been described in language more or less specific as to certain structural features, it is tov be, understood that the invention is not limited to any specific details but that the Ameans and construction herein described comprise but one mode of putting the invention into effect and the invention is therefore claimed broadly in any of its possible forms or modifications Within the scope of the appended claims."

VHaving thus described my invention, I claim :f j

1. A trolley Wheel, a shaft therefor having flattened portions adjacentits 'opposite ends, a trolley harp having open ended slots in the arms thereof in Which therflattened portions of the shaft are held against rotation, said harp having pockets formed in the arms and intersected by said slots, and retaining nuts engaging the shaft and seated Within said pockets.

2.-A trolley ,Wheel, a shaft therefor, a

any of its adtrolley harp With the arms of Which the shaft is interlocked against rotation, `and having lpockets formed thereon into Which the extremities of the shaft project, and collars engaging the shaft ends and contacting the-peripheral Walls of the pockets to hold the` shaft against lateral movement.

3. A trolley Wheel,a shaft therefor having flattened faces, a trolleyharp having slots formed inthe armsthereof-in Which the iiattened portions of the shaft engage to hold said shaft againstrotation, Hand means for preventing sliding movement of the shaft in said slots.

4. A trolley Wheel, a shaft therefor, retaining nuts therefor, a trolley harp having slots and pockets in the arms thereof, Said slots serving to interlock the shaft With the arms against rotation independent ot the retaining nuts which are seated in the pockets of the harp arms.

5. A trolley Wheel, a shaft therefor, retaining nuts for the shaft, 4a trolley harp the arms of which are provided With pockets in which the shaft nuts are seated, and

having slots for holding the shaft against rotation independent of the retaining nuts, the shaft being held against lateral movement by the engagement of the edges of the nuts With the Walls of the pockets.

In testimony whereof, I have hereunto set my hand this 16th day of September A. D. 1916.

ROBERT C. KISSINGER.

Vitnesses:

EDWARD E. DUNCAN, H. L. WALKER.

" Copies o this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

` Y Washington, D. C.

ggg

Images