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Publication numberUS1355946 A
Publication typeGrant
Publication dateOct 19, 1920
Filing dateJan 29, 1920
Priority dateJan 29, 1920
Publication numberUS 1355946 A, US 1355946A, US-A-1355946, US1355946 A, US1355946A
InventorsBliss Charles W, Dietrich Edward C
Original AssigneeBliss Charles W, Dietrich Edward C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Extensible trolley-pole
US 1355946 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

E. C. DIETRICH AND C. W. BLISS.

EXTENSIBLE TROLLEY POLE.

APPLICATION map IAN-.29, 1920.

3 5 .2 3 M v 2% r W w wfw ill!!! llllllld" illllllldn Witness:-

UNITED STATES PATENT OFFICE.

EDWARD G. DIETRICH AND CHARLES W. BLISS, OF SOUTH BEND, INDIANA.

EXTENSIBLE TROLLEY-POLE.

T 0 all whom it may concern:

Be it known that We, EDWARD G. DIETRICH and CHARLES W. BLIss, citizens of the United States, residing in the city of South Bend, county of St. Joseph, Indiana, have invented new and useful Improvements in Extensible Trolley-Poles, of which the following'is a specification.

Our invention relatesto extensible trolley poles, and especially to a trolley pole of the class describedin which a telescopic member is actuated by compressed air or fluid under pressure. 1

An object of our invention is the production of a simple and effective extensible trolley pole wherein the extensible member is actuated by compressed air issuing through a stationary piston arranged within the extensible pole member. Another object is the production of an extensible trolley pole wherein antifriction bearings are provided to facilitate the actuation of the extensible pole member. Other objects of our invention are mentioned and described herein.

The preferred embodiment of our inven tion is illustrated F on' the accompanying drawing in which Figure 1 is a section in elevation through the pole and a fragment of a forked pole support; Fig. 2 is a section taken on the line 22 of Fig. 1; and Fig.

I 8 is a section taken on the line 3-3 of I I Fig. 1. 1 b'imilar numerals of reference indicate like members and parts of members throughout the several views on the draw- 1n if} Tteferring to the drawing in detail, the numeral 1 indicates a tubular pole member the lower end whereof is clamped within a socket formed in a pole fork member 2, the detachable cap 3, which is fastened or clamped to pole member 1 by bolts 4, 4 constituting a part of said socket. The fork 2 may be formed in any suitable manner and is adapted to be pivotally' mounted upon a trolley car top or roofnot shown the lower extremities of said fork not being disclosed in the drawing.

The numeral 5 indicates a hollow or tubular pole stepmember screw threaded into the lower end of the pole member 1 and provided with an annular head or flange member 6 on the lower end thereof, said flange being adapted to be clamped within Specification of Letters Patent. Patent d O t 19 1920 Application filed January 29, 1920. Serial No. 354,812.

the annular recess or chamber 7 to prevent longitudinal displacement of the pole 1.

The numeral 8 indicates a tubular roller bearing carrier member within which the upper end of the pole 1 may be screw threaded at 9, said carrier member being provided with the opening 10 within which the hollow telescopic pole member 11 is movablyarranged. The pole 11 is preferably square or polygonal in cross-section and extends upward through the aperture 10 and downwardly and interiorly of the fixed pole 1,'a harp 12 being mounted upon the upperend thereof and by which said pole end may be plugged. The numeral13 indicates a hollow polebushing member rigidly fastened within the telescopic pole 11 in any suitable manner and extending substantially from the lower end thereof to a point intermediate the extremities thereof. The bushing 13 may be provided with the cylindrical bore 14 within which through the hollow piston rod 16 into the upper part of the hollow pole 11. The numeral 19 indicates a coil buffer spring arranged within the upper end of the pole 1 and encompassing the pole member 11, said spring being seated against the face 20 interiorly of the carrier 8, and -the annular flange 21 disposedinteriorly of'and upon the pole 1. The numeral 22 indicates an annular buffer or stop collar encompassing the pole 11 and rigidly secured thereto adjacent the lower end thereof but spaced therefrom, which collar is adapted to engage the spring 19 under an extreme outer or upward movement of the pole 11 to cushion the contact therewith and to prevent the displacement of the pole member 11 from the interior of pole member 1. I

The member 8 may be provided with four antifriction roller bearing members '23, 24, 25 and 26, respectively, arranged in rectangular formation, and mounted upon suitable terior faces of the pole 11 and serve both I as guides therefor and to reduce friction created when the pole is actuated telescopi-' cally of the member 1. v Numerals 36 and 37 indicate electric conductor members which maybe rigldly fastened to and uponopposite sides of the car rier member 8 by screws 38, 38 and provided with the hemispherical points 39 39 to conduct the electric current from pole 11 to pole 1 around the member 8. I

Obviously, when compressed air, or fluid under pressure, is admitted to the interior of the pole 11 through the hollow piston rod 16, the .pole 11 is projected upward and outward and a trolley wheelnot shownwhich may be carried by the harp 12 will be held against the overhead current supply wire.

We claim:

'1. A pneumatic. extensible trolley pole comprising an outer hollow pole member; a hollow telescopic pole member slidably arranged within saidouter pole member and projecting therefrom, said telescopic pole member being closed at its outer end; a stationary piston fitted within said telescopic pole member and around which said pole is slidable; and means for the introduction of fluid under pressure to the interior of the telescopic pole member for outward actuation thereof. V g

2. A pneumatic extensible trolley pole comprisi an outer hollow pole member; a hollowifilescopic pole member slidably arranged within said outer pole memberand projecting therefrom, said telescopic pole member being closed at :itsouter end; a stationary piston fitted within said telescopic pole member and around which said pole is slidable; means for the introduction of fluid under pressure to the, interior of the telescopic pole member for outward actuation thereof; "and means for limiting the outward movement of said telescopic pole member. V T

3. A pneumatic extensible trolley ole comprising an outer hollow pole mem er; a hollow telescopic .pole member slidably arranged within said outer pole member and projecting therefrom,lsaid telescopic pole member being closed at its outer end; a stationary piston fitted within said telescopic means for the introduction of fluid under pole and around which saidpole'is slidable; meansf-or the introduction offluid under pressure to the interior ofthe telescopic pole for outward actuation thereof; and resilient l. A pneumatic extensible trolley pole comprising an outer hollow pole member; a hollow telescopic pole member slidably arranged within said outer pole member and projecting therefrom, saidtelescopic pole member being closed at its outer end; a hollow stationary piston rod within said te'lescopic pole member; a piston mounted on said piston rod and around whichsaid telescopic pole -is slidable; and means for the introduction of fluid under pressure throu h said piston rod to the interior of the to escopicpole member for outward actuation thereof;

5. A pneumatic extensible trolley pole comprising an outer hollow pole. member; a hollow "telescopic pole member slidably arranged within said outer pole member and projecting therefrom, said telescopic pole being polygonal in cross-section and closed :at itsouter end; a stationary piston fitted within said telescopic pole member means for limiting the outward movement of the telescopic pole member.

and around which said pole is slid'able;

pressure tothe interior of the telescopic pole'member. for outward actuation thereof; and means 7 for limiting the outward movement of said telescopic pole member.

6. A pneumatic extensible trolley pole comprising an outer hollow pole member; a hollow telescopic pole member slidably arranged within said outer polemember and projecting therefrom, said p'ole beingclosed at its outer end; a stationary piston fitted within said telescopic pole and around which said poleris slidable; means for'the introduction of fluid under pressureto the interior of the telescopic pole for outward'ac tuationthereof; and means to prevent the rotation of said telescopic pole member. 1

[7. A pneumatic extensible trolley pole comprising an outer hollow pole member; a r

hollow telescopic pole member slidably arranged within saidouter pole member and projecting therefrom, said telescopic pole. member being closed at its outer end a stationary piston 'fitted within said. telescopic ,polemember and around whichasaid' v pole is slidable; means for the introduction of fluid'under pressure to the interior of the telescopic pole member for outward actuation thereof; and anti-friction bearings carried by the outer pole member and adapted to bear against the telescopic'pole 1'25 membenw 8. A pneumatic extensible trolley pole comprising an outer hollow pole member;

a hollow telescopic pole member slidably arranged within said outer pole and'pro- 1 jecting therefrom, said telescopic member being closed at its outer end; a hollow stationary piston rod within said telescopic pole; a piston mounted on said piston rod and around which said telescopic pole is slidable; means for the introduction of fluid under pressure through said piston rod to the interior of said telescopic pole for outward actuation thereof; and means to limit the outward movement of said telescopic pole, said means comprising a coil spring seated within said outer pole member, and a butler member carried by said telescopic pole member adapted to engage said sprin 9. A pneumatic extensible trolley po e comprising an outer hollow pole member; a hollow telescopic pole member slidably arranged within said outer pole member and projecting therefrom, said telescopic pole being closed at its outer end and provided with an interior lining or bushing; a stationary piston fitted within the bushing of said telescopic pole member and around which said pole and bushing are slidable;

and means for the introduction of fluid under pressure to the interior of the telescopic pole member for outward actuation thereof.

10. A pneumatic extensible trolley pole comprising a hollow outer pole member; a base member upon which said pole is rigidly mounted; a hollow telescopic. pole member rectangular in cross-section slidably arranged within said outer pole mem her, said pole being closed at its outer end and provided with a bushing or lining having a cylindrical bore; a stationary piston fitted with-in said telescopic pole member bushing. and around which said bushing and pole are slidable; and means for the introduction of fluid under pressure to the interior of the telescopic pole member for outward actuation thereof.

In testimony whereof we have hereunto afiixed our signatures this 10th day of J anuary, 1920.

EDWARD C. DIETRICI L. CHARLES W. BLISS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2806722 *Aug 19, 1953Sep 17, 1957Atkins Albert ETelescopic support
US2931669 *Oct 22, 1956Apr 5, 1960Mcdonald Frank AExpansion compensator with anti-torque device
US5425225 *Sep 1, 1994Jun 20, 1995M.A.I.Bo. S.R.L.Telescopic extensible rod for agricultural tools for picking fruit from trees or for cutting off branches of trees
Classifications
U.S. Classification191/64, 285/302
International ClassificationB60L5/00, B60L5/12
Cooperative ClassificationB60L5/12
European ClassificationB60L5/12