US1725023A - Pole footing - Google Patents

Description

Aug. 20, 1929.

M. J. STAM 1,725,0 23

POLE FOOTING FilegLOct. 11 1926 ZSheets-Sheet i Aug. 20, 1929. M. J. STAM POLE FOOTING Filed Oqt. 11, 1926 v 2 Sheets-Sheet 2 ll-lll'lfillllllll l ll Patented Aug. 20, 1929.

UNITED STATES PATENT OFFICE.

POLE FOOTING.

Application filed October 11, 1926, Seriah No. 140,960, and in the Netherlands October 13, 1925.

My present invention relates to a polefooting for wooden or other poles or piles, used for supporting electricity, telephone, telegraph and such lines, in short poles which must be partly dug into the earth in order to acquire the necessary stability, and which are made of a material, which is liable to rot or rust or is somehow destroyed by its contact with damp earth.

The pole-footing may be made of concrete, either reinforced or not, or a similar material which resists the influence of damp earth.

According to my present invention the pole-footing is made of two parts or two halves. The known constructions of this kind present the difiiculty, that both parts of the footing are attached to the pole by means of one or several bolts, running through the latter; the holes made in the wood are a ready cause of rottening or decay of the material of the pole. A'marked disadvantage of these constructions is that the two parts of the footing must be con- 25 nocted with each other by means of three bolts or braces, viz. one through or round the middle of the footing and one at each end thereof. This arrangement is faulty because the polesespecially the wooden ones, which are thinner at the top than at the bottomnever have the same shape, hence by tightening the intermediate bolt, either the top or the lower of the two other bolts can no longer keep the parts tightly assembled.

This drawback is entirely avoided by application of the invention.

The pole-footing according to my invention consists of two entirely similar parts, having a rounded shape, the curvature of which is however stronger than that of the pole. Each pole is therefore perfectly supported at four different places. The parts are provided with inner projections, through which, and under the pole, the bolt passes. Hence the latter needs not to run through the wood nor is it in contact with the earth. This bolt acts as a rotation centre when the bottom ends of the footing are pushed apart by means of a stud bolt with nuts. In this way both parts of the footing are firmly clamped round the pole.

This pushing apart of the bottom ends of the footing may be done in different ways, as e. g. by means of a key driven between the parts.

In the accompanying drawing:

Figure 1 illustrates a vertical section;

Figure 2 a side elevation view;

Figure 3 a horizontal section on the line 33 of Figure 1 and in plan disclosing the bolt 2;

Figure 4 an end view and Figures 5 and 6 show views of the bolts 2 and 3.

Figure 7 is a detail sectional view of the lower portion of the footing, showing in elevation a key connecting and arranged for adjusting or pushing apart the bottom ends of the footing, according to a modification of the invention.

The footing consists of the parts 1, 1, a bolt 2, a stud bolt or key 3, hence four parts in total.

The inner projections 4, whereupon the base of the pole rests, may have an inclined upper face, in order to allow the water running down the pole to escape. Existing poles can also easily be fitted with the footing according to the invention and by so doing their life is considerably lengthened.

In Figure 7 is illustrated a modification of the invention in which a wedge shaped key 5 is employed as connecting means between the lower ends of the members 1*, which members are provided on their opposing sides with downwardl converging inclined surfaces 6 against w ich the correspondingly shaped sides of the key bear.

lVhat I claim, is:

1. A pole footing of the class described comprising a pair of members provided in their opposing sides at their upper ends with recesses to receive the lower end of a pole between them, means connecting said members together for angular movement of said members, said connecting means being intermediate the ends of said members and means connecting the lower ends of said members together, said connecting'means being arranged for adjusting said members second named connecting means is also a bolt so that their lower ends may be forced fitted in openings near the lower ends of 1 apart to cause the pole to be firmly gripped said members and provided with adjusting between the upper ends of said members. nuts which bear against the opposing sides 2'. A pole footing as claimed in claim 1 of said members. in which the first named connecting means In testimony whereof, I have signed my is a bolt loosely fitted in openings with name to this specification. which said members are provided and the MARTINUS JOANNES STAM.

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