US1915752A - Anticlimbing device for towers - Google Patents

Description

June 27, 1933. N, B, OBBARD 1,915,752

\NTICLIMBING DEVICE FOR TOWERS Filed Aug. 28, 1931 Imenfor:

Woe/7am 5. 055/480,

Patented June 27, 1933 UNITED STATES PATENT OFFICE NORMAN B. OBBARD, O]?v PITTSBURGH, PENNSYLVANIA ANTICLIMBING DEVICE FOR TOWERS Application filed August 28,1931. Serial No. 590,021.

away from and toward the other. Fence,

wire is stretched between the inwardly extending arms and from the adjacently positioned pair of arms to'eac'h of the other outwardly extending arms, so that by swinging the swinging arm a portion of the wire may be slacked to permit passage through the guard of a repairman. i In the drawing: t

Figure 1 is a top plan view of anexample of tliis'invention as it appears applied to a power transmission tower, the tower being shown in cross-section; I v Figure 2 is a side view of Figure l.

Having referenceto the drawing, there is shown a tower 2 of the type ordinarily used for carrying high tension electric power transmission lines. A plurality of inwardly extending angle iron arms 8 are bolted to each leg of this tower 2, these arms being notched so that barbed wire at may be stretched between them nd securely positioned by being looped abou' each arm in these notches.- A

plurality of outwardly extending angle iron arms 5 are also bolted onto the tower2 and are likewise notched. Two of these arms 5 are adj acently positioned, one of these being fixed and the other mounted on a hinging bolt 6 for swinging movement, as is indicated by dotted lines and arrows in Figure 1.

Barbed wire 4 is stretched between each of these outwardly extending arms 5 from the two adjacently positioned arms, the wire also being in this instance looped about each arm at its notched part so as to be securely fixed in position. The two adjacently positioned arms are apertured so that a pad lock 7 may be used to lock them together.

The above construction adequately preyents climbing of the towers 2 by unauthorlzed persona-yet when the pad lock 7 is removed and the swingable arm is swung away from the adjacently positioned fixed arm a portion of the barbed wire is slacked sufii- 5 ciently to permit a workman to climb through the guard and ascend to the top of the tower.

In the example shown the arms 3 and 5 are in each instance oppositely positioned on the tower legs so that they may be fixed thereto by a common bolt 8, thereby saving time and HIODQIY.

In order that the swingable arm may be accommodated to any size tower leg its hinge part is provided with a. slot 9 instead of a round hole. Although a specific form of this invention ias been shown in accordance with the patent statutes it is not intendedvto limit the scope oft-his invention exactly thereto, except as is defined the appended claims.

I claim 1. In combination with a power transmission tower, a plurality of extending arms positioned on said tower at spaced intervals, a pair of extending adjacent arms positioned on said tower between two of said first named arms and in a plane therewith, one of these adj acent arms being arranged for swinging movement away from and towards the other and in a plane therewith, and fence wire stretched between said adjacent arms and said first named arms.

2. In combination with a power transmission tow-er, a plurality of inwardly extending arms, a plurality of outwardly extending arms, two of these arms being adjacently positioned and the others being positioned at spaced intervals therefrom on said tower, one or the two adj acently positioned arms being arranged for swinging movement away a from andtowards the other and in a plane therewith, means for locking said tworadja cently positioned arms together and fence my hand.

NORMAN B. OBBARD.

wire stretched from and fixed to said two

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