US821733A - Telegraph-pole. - Google Patents

Description

No. 821,733. PATENTED MAY 29, 1906. D. W. PEGK.

TELEGRAPH POLE.

APPLICATION FILED NOV: 9, 1903.

W nn-sex UNITE ll STATES PATENT OFFICE.

TELEGRAPH-POLE.

Specification of Letters Patent.

Iateutea May 29, 1906.

Application filed November 9, 1903. Serial No. 180,440.

1'0 a w/wm it may concern:

Be it known that I, DUNCAN W. Pack, of Syracuse, in the county of Onondaga, in the State of New York, haveinvented new and useful Improvements in T elegraph-Poles, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to improvements in sheet-metal poles for supporting telegraph, telephone, and electric-light wires'and. other fixtures.

The object is to provide a light yet strong pole from two or less sheet-met al pieces which may be easily and quickly assembled and presents a neat and trim appearance when placed in position.

Other objects and uses will be apparent in the subsequent description.

In the drawings, Figure 1 is an elevation of my improved pole, showing a swinging arm as mounted thereon for supporting an electric light. Figs/.2 and 3 are respective views taken 011 lines 2 2 and 3 3, Fig. 1. Fig. 4 isa cross-sectional view of a modified form of my invention.

Similar reference characters indicate corresponding parts in all the views.

In Figs. 1 to 3, inclusive, I have shown a pole which is triangular in cross-section, that seen in Figs. 1 to 3, inclusive, consisting of a vertically-disposed channel or angle bar 1, which is pressed or stamped from a single piece of sheet metal to form two diverging sides of the pole, while the third side consists of a separate plate 2, of sheet metal, which is inserted in the open side of the channel or angle plate 1 and. is held from outward displacement by flanges 3, projecting inwardly from the free upright edges of the plate 1, the plate 2 being of substantially the same width as the distance between the sides of the plate adjacent to theflanges 3, and therefore the converging sides prevent the inwardv displacement of the plate 2, and at the same time this latter plate tends to brace the sides against inward compression.

In order to clearly demonstrate the practicability of this invention, I have shown a swinging arm 4 as mounted upon a brace or bracket 5, which is secured to the upper end of the pole by clamping-bands 6, the pole being adapted to carry an electric light and is raised and lowered by means of a cable or cord 7, having one end secured at 8 to the weighted or heel of the pole, and its other end extends downwardly through an opening in the plate 2 into the interior of the pole and runs over suitable idlers 9, which are rotata bly mounted within the interior of the pole, as best seen in Fig. 3.

Near the base of the pole, at a suitable distance above the sidewalk or ground line, is an opening 10 in the plate 2 to permit access to the interior of the pole, so that the attendant may engage the lower end of the cable 7, and thereby control the movement of the swin ing pole 4t, said opening being provided with a closure 11, which may be normally locked to prevent malicious interference with the cable. The plate 2 may be inserted into the open side of the channel or angle plate 1 either before or after said opening is formed, but 7 preferably after, by sliding it in from the bottom upward behind the flanges 3, and in or- 'der to further stiffen the sides of the post against inward compression I usually insert one or more triangular braces 12 into the interior of the pole, so as to engage the inner faces of its sides, as seen in Fig. 3. In Fig. 4 is shown a rectangular channel or angle plate 50, which is also formed of sheet metal having its upright edges bent inwardly at 51 and then returned against the sides of the plate 50, the open side of the angle-plate 50 being closed by a second sheet-metal plate 52, having its opposite edges abutting against the sides and flanges 51 of the plate 50, this sec ond plate 52 being held in place by an inner hexagonal brace 53,which engages the inner faces of the sides of the post. These poles are preferably made tapering from bottom to top, and each plate is preferably pressed or rolled to the desired form before being assembled, and it is apparent that the plate 2 may be inserted in the open side of the plate 1 either by sliding it upwardly from the bottom within the flanges 3 or by spreading the sides of the plate 1 sufficient to permit the plate 2 to be inserted between the inner edges of the flanges 3, after which the sides of the plate 1 spring back into position and maybe clamped by external bands, as 6, or by other equivalent meansnot necessary to herein illustrate or describe, the object being to prevent spreading of the sides or displacement of the plate 2 when the post is in operative position.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. A hollow metal pole, a swinging arm mounted on the pole, a cable having one end connected with the arm and its other end eX- tending downwardly within the pole, said pole having an opening near the bottom to permit access to the interior and a closure for the opening.

2. A metal pole comprising a metal plate angular in cross-section and open at one side, the edges at the open side being bent inwardly, a second plate which is fiat and straight from edge to edge and inserted within the inturned edges of the other plate and a plurality of braces fitting Within and engaging the inner sides of the pole.

3. A metal pole comprising a metal plate angular in cross-section and open at one side with the edges inturned at the open side, a second plate of straight flat form inserted in the open side within said inturned edges, a plurality of segregated braces arranged with i in and engaging the sides of the pole, at plurality of clamps engaging the exterior of the pole, a brace or bracket attached to said clamps and an arm pivotally attached to said bracket.

In witness whereof I have hereunto set my hand this 7th day of October, 1903.

DUNCAN W. PECK. Witnesses:

H. E. CHASE, MILDRED M. N OTT.

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