US1195262A - A coepoeation op pennsyl - Google Patents

Description

C. L. PEIRCEJR. LAMP SUPPORTING TROLLEY STRUCTURE.

APPLICATION man OCT. 15, 1915.

1 1 95,262 Patented Aug. 22, 1916.

2 SHEETS-SHEET l.

C. L. PEIRCE, JR. LAMP SUPPORTING TROLLEY STRUCTURE.

I APPLICAT'ON FILED 0CT.15 19|5- 1,195,262. Patented Aug. 22, 1916.

2 SHEETS-SHEET 2.

MU! w? W m I I I M H IWE QM I WI l I CHARLES I. PEIRCE, JIL, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO HUBBARD & C30,, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYL- VANIA.

LAMP-SUPPORTING-TROLLEY STRUCTURE.

Specification of Letters Patent.

Patented Aug. 22, 1916.

To all whom it may concern:

Be it known that I, CHARLES L. Pnmon, J12, a citizen of the United States, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have in vented certain new and useful Improvements in Lamp-Supporting-Trolley Structures, of which the following is a specifica tion. 7

My invention relates to trolley structures particularly adaptable for supporting lamps for street lighting purposes, the object being to provide improved construction and arrangement which will more effectively protect all the operating parts against weather.

My improved construction is clearly shown in the accompanying drawing in which Figure l is a side elevational view of the upper end of the pole and the lamp supporting structure mounted thereon. Fig. 2 is a plan View of the parts shown in Fig. 1. Fig. 3 is a sectional view on plane 33 of Fig. 2. Fig. 1 is a sectional view on plane t4= of Fig. 1. Fig. 5v is'a view of the outer end of the boom and lamp support with the boom end cap removed. Fig. 6 is a view of the inner end of the boom and trolley mechanism. Fig. 7 is an outer end view showing a modified form of trolley.

The boom 10 resembles a barn door hanger beam, being of inverted U shape cross section with its inner edge sections turned inwardly and upwardly to form the parallel rail sections 11 and 12 and the troughs l3 and 14:. -At its inner end the beam is cut away a distance from the end to leave only the part 15 of its inner wall for providing space for the insertion and manipulation of a bolt or lag screw 16 by means of which the boom may at its inner end be secured to a pole p.

The boom is held in horizontal position by a rod 17 which is secured to the pole at its inner end by a bolt or screw 18 and which is secured at its outer end to the boom end by a bolt 19, and this bolt 19 may also secure, on the outer end of the boom, the cap 20 for closing the boom end. To prevent swing of the boom around the pole a brace 21 is secured thereto near the pole, and may be secured to the pole by a separate lag screw or by the bolt 16 which holds the inner end of the boom to the pole.

Adjacent the pole and to the top of the boom is secured the insulator supporting cross arm 22 which as shown may be a length of channel iron provided at its ends with insulator supporting thimbles 23 of any desired construction.

The lamp supporting trolley comprises the body 24 in the form of a short length of channel iron whose width is such that the ends of its sides a and b may engage in the troughs l3 and 14 of the boom to use such troughs as a trackway so that the trolley may be slid back and forth on the boom.

The top of the body 24 has the longitudinal slot 25 through which extends the flattened head 26 of the cylindrical lamp supporting bar 27. The lower end of this bar is threaded to receive a suitable fixture 28 for supporting the lamp 2' and the shade s. The bar 27 has preferably the transverse slot 29 in which is secured at its center the outer cross arm 30 which may also be a short length of channel iron and provided at its ends with the usual receiving thimbles 31.

In practice the current conducting leads (not shown) extend from the top of the pole and are secured to the insulator on the cross arms 22 and 30 in a well known manner. When the lamp is in service it is suspended from the outer end of the boom, but for the purposes of inspection, renewal or repair, it is desirable to shift the lamp to the inner end of the boom so that such inspection, renewal or repair may be accomplished by the repair-man standing on the pole.

In order to facilitate shifting .of the trolley on the boom I provide a rod 32 which may be of metal, wood, or other stiff material. At its outer end the rod has the eye 33 looping through the hole in extending through the head 26 just above the top of the trolley body 24, and such engagement of the rod with this head serves to hold the lamp supporting bar 27 to the trolley body, there being sufficient freedom in this suspension arrangement to permit the lamp structure to hang vertical. The rod extends through the boom to the inner end thereof where it can be reachedwhen it is desired to pull in the trolley and lamp structures. In order to prevent accidental displacement of the trolley and lamp after it has been shifted to its outer service position, I provide means for locking the rod.

As shown, the inner end section 34: of the inner rail 12 is bent downwardly to horizontal position and has the slot or hole 35 therethrough and the inner end 32 of the rod 32 is deflected downwardly at right angles and is inserted in the slot or hole 35 after the trolley has been pushed out to the boom end, and the lamp will then be anchored in its service position and prevented from becoming displaced. When it is desired to pull the lamp in, the rod is lifted sufliciently to lift its end 32 out of the opening 35, and when such opening is in the form of a slot the bar can be shifted laterally to remove its end 32 therefrom.

My improved structure described above has proven to be very desirable and efficient. By means of the stiff rod 32 the lamp supporting trolley can be more positively and readily shifted back and forth, and can be i more securely anchored and locked in its service position. The lamp supporting trolley and the rod are always within the boom when the lamp is in service position and they are thus fully protected against the weather, and with the cap 20 in place on the end of the boom it is impossible for rain, sleet or snow to get to the inside. On ac count of such adequate protection against the weather, lubricant can be applied to the traclnvay so that the trolley will slide freely. The inverted U shaped cross section also gives great strength and rigidity to the boom and lighter stock can be used.

Where the lamp structure to be supported is very heavy, the trolley, instead of sliding over the trackway, may be provided with wheels 36 pivoted to the sides a and Z) and riding in the troughs 13 and 1st.

Having now described my invention, I claim:

1. In a lamp supporting structure the combination of a boom structure having a longitudinal trackway, a trolley for riding on said trackway and h aving a slot, a lamp supporting member extending upwardly through said slot and having an opening therethrough above the trolley, a rod projecting at its outer end through said opening to thus secure the lamp supporting member to the trolley, said rod extending to the inner end of said boom structure to be manipulated to effect shifting of the trolley on the track.

2. In a trolley arm structure, the combination of a boom of inverted U-shaped cross section with its edge sections turned inwardly to form a trackway, a trolley in the form of a length of channel bar having the ends of its limbs engaging said trackway to ride thereon, and a lamp support eX- tending from said trolley downwardly through the trackway.

3. In a trolley arm structure, the combination of a boom of inverted U-shaped cross section with its edge sections turned inwardly to form a traekway, a length of channel bar riding with its limbs on said trackway and forming a trolley, the top of said trolley having an opening, a lamp supporting hanger extending upwardly through said opening, a rod within the boom interlocked with said hanger to suspend it from the trolley, and means at the inner end of said boom for locking said rod to thereby lock the trolley against displacement.

4. In a trolley arm structure, the combination of a boom having a trackway at its interior, a trolley slidable on said trackway, a lamp hanger extending upwardly through said trolley and having an opening above the trolley, a shifting rod looped at its outer end through said opening to thereby secure the hanger to the trolley, and means for locking the inner end of said rod to the boom to prevent displacement of said trolley.

5. In a trolley arm structure, the combination of a hollow boom having a trackway at its interior, a trolley ridable on said traclrway, a shifting rod pivoted at its outer end to said trolley, and a locking slot at the inner end of said boom for receiving the inner end of said rod to lock the rod and thereby the trolley against displacement.

6. In a trolley arm structure, the combination of a boom having an internal trackway, a trolley ridable on said trackway, a shifting rod pivoted at its outer end to the trolley and having its inner end deflected, and a locking notch at the inner end of said boom for receiving the deflected end of said rod to thereby lock the rod and trolley against displacement.

7. In a trolley arm structure, the combination of a tubular boom open at its inner end and having an interior trackway, a trolley within the boom slidable on said trackway, and a rod in said boom connected at its outer end to the trolley and shiftable longitudinally through the boom and the open inner end thereof whereby to efiect shift of the trolley on the trackway.

In witness whereof, I hereunto subscribe my name this 11th day of October, A. D.

CHARLES L. PEIRCE, JR. lVitnesses:

RICHARD M. KnRsoHNnR, A. R. RoBrrzEK.

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

Washington, D. C. r

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