Metal pole

Application filed April 22, 1920. Serial No. 375,657.

To dll whom it may concern:

Be it known that I, Maubice Lachman, a citizen of the United States, and a resident of New York, in the county of New York 5 and State of New York, have invented certain new and useful Improvements in Metal Poles, of which the following is a specification.

My present invention relates to the con10 struction of tapered metal poles such as telegraph, telephone or other transmission line poles.

The object of the invention is to simplify the construction of these poles and particu15 larly of such poles as require practically the same strength from all sides.

To these ends I employ a minimum number of parts to construct the pole as a whole and provide a rolled tapered metal section 20 having side flanges for each part or member.

In the preferred form of the invention all the parts employed in the structure are duplicates of each other and each is a tapered channel section constructed from standard 25 rolled metal shapes. In this way the pole may be shipped “knock-down” and by nesting the parts small space is required for storage or shipping.

The invention consists in the construction 30 of metal pole hereinafter more particularly described and then specified in the claims.

In the accompanying drawings, Fig. 1 is a side elevation of a tapered metal pole constructed in accordance with this invention. 35 Fig. 2 is another side elevation of the. same—taken at right angles to that shown in Fig. 1'.

Fig. 3 is a transverse cross-section taken on the line 3—3 Fig. 1.

Fig. 4 is a perspective view of one of the members or units..

Fig. 5 is a transverse cross-section through the same.

In the preferred embodiment of the in45 vention the pole proper comprises a middle member and two side members, one on each side of and secured to the middle member. These members are preferably made up of but four duplicate parts or units and each 50 part or unit is formed from rolled channel shaped sections of any desired standard size.

Each part is tapered from end to end and consists of two longitudinally divided lengths of metal 1,2 (see Figs. 4 and 5) each 55 having a flange 3. The lengths are secured together along the joint 4 by spot welding, riveting or otherwise. These parts are formed as shown and described in my prior application filed March 22nd, 1920, Serial so No. 367,739 by taking a rolled section or sections of flanged bars and separating the web by a bias cut, then reversing the relation of the parts and securing them together thereby forming a tapered flanged length of 65 metal.

To form the middle member 5 of the pole I preferably take two of these tapered channel sections and arrange them back to back, riveting them together if desired. If pre- 70 ferred this middle member may be constructed from an I-beam section.

Each side section 6, 7 is seated against the flanges 3 of the middle member and secured thereto in any desired way, riveting pre- 75 ferred. The middle member 5 is preferably arranged down the center of the side members 6 and 7 so that in cross-section the pole forms an H.

If desired the side members 6 and 7 may 80 also be formed from an I-beam section instead of a channel in which case there will be a double flange at each longitudinal edge of the pole. Also if desired to lighten the pole or for ornamental purposes parts of the 85 webs of the members may be removed according to any desired design.

By following this invention a tapered pole having any desired spread of base as well as equal strength from all sides may be con- so structed in the most economical manner.