US 1479553 A
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Description (OCR text may contain errors)
Jan. 1, 924 1,479,553
M. PARLOW TROLLEY POLE Filed June 8, 1923 Patented Jan. l, 192
UNETED fiTATES MATE PARLOW, croon r-no, ILLINOIS.
Application filed June 8, 1923. Serial No. 644,077.
T 0 all whom it may concern:
Be it known that I, MATE PARLOW, a citizen of Austria, residing at Coello, in the county of Franklin and State of Illinois, have invented certain new and useful Im provements in Trolley Poles, of which the following is a specification.
In carrying out the present invention it is my purpose to provide a trolley pole particularly adapted for use in conjunction with electric cars employed in mines wherein any liability of the pole becoming broken when the trolley wheel hops otl" the wire will be overcome.
In mine car trolley poles with which I am at present familiar, the same consist of a single bar member and it oftentimes happens that when the wheels of these trolley poles hop of? the wires the poles will strike againstthe roof of the mine and become broken, which results in a great loss of time not only for the motorman of the cars but also for the miners.
It is therefore the primary object of this invention to provide such a trolley pole that will not become broken in the event of the trolley wheel hopping off the wire.
It is a still further object of my invention to provide such a. trolley pole that is extremely simple of construction, one that may be manufactured and installed upon the present type mine cars.at a minimum expenditure.
The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawings, the invention residing in the construction, combination, and arrangement of parts as claimed.
In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein z- Figure 1 is an elevation of my improved trolley pole, and
Figure 2 is a detailed longitudinal crosssection thereof.
With particular reference to the drawing, my novel pole comprises a pair of sections 5 and 6 respectively, the section 5 being in the form of an open ended tube, while the section 6 is a solid bar and is adapted for free telescopic movement within the section 5. The outer end of the bar section 6 is so formed at 7 so as to have the usual mine This,
car trolley wheel secured thereto.
however, is conventional and therefore tailed description is not necessary.
The opposite end of the pole section 6 is reduced in diameter and has shrunk thereon a metal ferrule 8 and between this ferrule and the said pole section 6 and extending forwardly therebetween is a spring arm 9 formed at its front end with a vertical head 10, which head is slightly beveled on the under side and is adapted for projecting through opening 11 in said ferrule and to likewise engage through an opening 12 in the tubular section 5 of the pole as clearly shown in Figure 2 for maintaining said sections interlocked.
The bar section 6 is chanelled at 13 beneath the major portion of the spring arm 9 whereby the head 10 thereof may be depressed for permitting a telescopic move ment between the sections 5 and 6.
The section 5 is longitudinally slotted at 14, which slot is coextensive with the opening 12 in the tube and is adapted for permitting of the projection of the head 10 of the spring arm 9 therethrough as the section 6 slides within the section 5.
Conventional means may be employed for attaching my novel pole to the mine car and in view of the above description when considered in conjunction with the accompanying drawing, it will at once be apparent that in use the sections 5 and 6 are positioned with respect to each other as shown in the views.
The above described trolley pole is more particularly adapted for mine cars and in use the pole is adapted to incline forwardly on a mine motor car for transmitting current from an overhead trolley wire to the mine motor, the pole maintaining this forwardly inclined position during the forward movement of the car. If the trolley wheel mounted on the end of the pole indicated at 7 should for any reason become disengaged from the trolley wire the same will be swung upwardly by the usual spring mounting for the pole so that the wheel will strike the roof of a mine or supporting timbers therefor, or may strike some other obstruction which in the movement of the car forwardly will exert an endwise pushing movement on the bar 6 sufficient to force the latch out of en gagement with the opening 12 by reason of the beveled portion of the head: 10 and per mit the pole to slide downwardly within the tube 5 and prevent breakage of the pole, the upper end of the tube being of a length which will clear all obstructions in the mine passage. T he operator may then extend the pole for re-engagement with the trolley wire manually, or by any other suitable means, and proceed with the car.
The slot 14: and the head of the spring arm 9 co-operate in the telescopic movement of the sections for guiding one section relative to the other, so that in the subsequent extension of the bar 6 on the tube, the head 10 will be in line for engagement with the opening 12 in the end of the tube.
Numerous advantages of a trolley pole of this character will be apparen to those skilled in the art, and even though I have herein set forth the most practical embodiment of the invention with which I am at present familiar it is nevertheless to be understood that minor changes may be made therein Without departing from the spirit and scope of the invention as claimed.
Having thus described the invention what I claim as new, and desire to secure by Letters Patent, is
1. In a trolley pole of the class described a pair of telescopic bar sections and means for maintaining said sections in an extended position, said means of being displaceable upon the upper section striking an obstruction.
2. A trolley pole including a pair of telescopic sections, and retractable means carried by one section for co-eperative engage ment with the other section .to hold said sections in extended relation.
3. A trolley pole including a pair of telescopic sections, and means carried by one section for co-operation with the other section to normally hold said sections in extended relation, said means being disengageable upon impact or the members in line therewith to permit the sections to telescope.
l. A trolley pole including a pair of telescopic sections, section for co-operation with the other sec-- tion to normally hold said sections in extended relation, said means being disengageable upon impact of the members in line therewith to permit the sections to telescope, said means being-also adapted to guide one section relative to the other in its telescopic movement.
5. A trolley pole including a pair of telescopic sections, and a resilient member carried by one section having a head adapted for co-operation with an opening at one end of the other section for holding said members in extended relation, said member being disengageable to permit the sections to telescope when an impact is exerted in line with the sections.
V In testimony whereof I aiiix my signature.
and means carried by one