US2901798A - Guy hook for attachment to transmission line poles, or the like - Google Patents

Description

K. C. JENNE GUY'HOOK FOR ATTACHMENT TO TRANSMISSION LINE POLES, OR THE LIKE Filed April 15, 1955 Sept. 1, 1959 Zmventor KENNETH D. 'rJENN-E. 5X2; (m

Gttorneg United States Patent O GUY HOOK FOR ATTACHMENT TO TRAN MISSION LINE POLES, OR THE LIKE Kenneth C. Jenne, Branford, Conn., assignor to Malleable Iron Fittings Company, Branford, Conn., a corporation of Connecticut Application April 15, 1955, Serial No. 501,558 1 Claim. (Cl. 24-115) The present invention relates to guy hooks for attachment to transmission line poles or the like, and in particular constitutes an improvement in guy hooks of the type disclosed for instance, in the patent to R. B. Williams, No. 1,855,564 granted April 26, 1932, reissued as Reissue Patent No. 18,163 on October 4, 1932, and in the patent to Kenneth C. Jenne, No. 2,643,428 granted June 30, 1953. For convenience ofillustration the in vention is disclosed herein incorporated in a guy hook similar to that shown in the Jenne Patent No. 2,643,428.

These guy hooks heretofore have been provided with a separate spike or lag screw which was driven through a hole in the heel of the guy hook into a wood pole, for the purpose of increasing the resistance of the guy hook to shear forces. The relationship between the spike or lag screw and the hole is necessarily arelatively loose one, permitting at least slight movement between the spike or lag screw and the body of the guy hook. What may be termed the loose hardware problem resulting from this necessary relative movement has had a number of disadvantageous affects, some electrical and some mechanical.

In the electrical field it has been found that under certain atmospheric conditions, particularly dampness, the positive contact between the separate relatively movable metal components could produce sparking, heating, and in some cases, a potential condenser is produced which has been found to be capable of producing noise in television and other very high and ultra high frequency transmissions. This problem has become so acute and of such concern to some electrical utilities that they have resorted to the use of electronic detector devices to locate such condensers. 7

Another difficulty, where a fastener such as a separate spike or lag screw is employed, arises from the shrinkage of the wood as it dries out. When this occurs, the possibility of the separate fastener tilting from the vertical component of the load imposed on the guy hook is increased. As the tilt of the fastener increases the less effective it is in performing its shear resisting function. Since a spike or a lag screw cannot be placed under any more tension than the ability of the spike surface or the threads of the screw to engage the wood would provide, it follows that as the wood dries out and/ or deteriorates, the ability to restore tension constantly decreases.

An object of the present invention is to provide a guy hook in which the shear resisting heel fastener is in the form of an integral relatively immovable spike projection adapted to be driven into the 'wood pole by blows directly applied to the heel of the guy hook, to the end that the disadvantages resulting from looseness and relative movement of a separate shear-resisting fastener are eliminated.

In addition to the economies afiected in manufacture,

the guy hook of the invention has an umber of advantages.

' which to reckon when he is at the top of the pole.

A further object is to provide a guy hook structurehaving an integral spike in such relation that overall losses which can occur from breakage of the spike prior to malleablizing (conversion from white iron to malleable iron) are minimized. Such breakage is bound to occur with more or less frequency in this type of piece just as a result of normal handling, and it is proposed to provide means whereby when the spike of a guy hook is broken the guy hook may be readily converted to one having a spike or lag screw receiving hole, by drilling such hole in such relation to the broken spike that the latter is entirely removed.

Other objects and advantages of the invention will become apparent from a consideration of the following detailed description taken in connection with the accom panying drawings wherein a satisfactory embodiment of the invention is shown. However, it will be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claim.

In the drawings:

Fig. 1 is a front elevation of a guy hook according to the invention;

Fig. 2 is a side elevation;

Fig. 3 is a rear elevation;

Fig. 4 is a horizontal sectional view, taken along the line 4-4 of Fig. 1;

Fig. 5 is a front elevation of the guy hook installed upon a pole and with a guy cable engaged therewith;

Fig. 6 is a vertical sectional view, taken along the line 66 of Fig. 5;

Fig. 7 is a view partially in side elevation and partly in vertical section, showing a guy hook with a broken spike portion, and with a drill in position to remove it;

and- Fig. 8 is a similar view showing the guy hook with the broken spike portion removed and a lag screw receiving hole drilled therein.

The guy hook, according to the illustrated exemplary embodiment of the invention, is preferably formed of malleable cast iron and comprises an upper hub portion 10, a lower heel portion 11 and an intermediate connecting portion 12. The guy hook is of generally channel shape at its rearward side, the rearwardly facing cavity 13 being enclosed by the substantially semi-cylindrical upper wall 14 of the hub portion and by the side walls 15-15 and the front wall 16 of the intermediate portion 12, said front wall being inclined downwardly and inwardly from the forward wall 17 of the hub portion to the forward wall 18 of the heel portion 11.

The forward wall 17 of the hub portion has a vertically disposed planular bearing surface for engagement by the tightening nut of the through bolt, as will more fully appear, and is provided with a hole 19 for receiving the end of the through bolt, the passage for the through bolt being extended from said hole through the upper end of the cavity 13.

The heel portion is provided with an integral rigid conical shear-resisting spike 20, whereby the heelportion may be anchored in a pole, as will hereinafter more fully- Patented Sept; 1, 19591 3 appear. to thevertical side walls of the heel portion and its horizontal axis is parallel with the horizontal axis of the through bolt receiving opening 19. These axes, in turn, lie in a common perpendicular plane which is substantially radial with respect to the vertical axis of the pole to which the guy hook is attachable. A circular forwardly projecting drive head portion 21 is integrally provided upon the forward wall 18 of the heel in axial alignment. withthe spike.

A. rib 22: is formed upon the upper side of the hub portion 10 and: is extended at each side in the form of downwardly extending hooks 23..-.23, the rearward surface ofv the rib and the rearward and under surfaces of the hooks' forming a substantially semi=circular downwardly and outwardly inclined groove portion 24 for receiving the loop of a. guy cable, as will, presently more fully appear.

The rearward surface 25 ofthe hub portion 10 is in the form of an inverted Usurrounding the rearward end of the through bolt passage, and is in a downwardly and forwardly inclined plane which converges downwardly with respect tothe vertical plane of the forward bearing surface 11. The lower ends of the inclined surface 25 connect with the upper ends of the vertically disposed rearward edges 26-26'of the side walls 15 of the intermediate portion, and these connect with the rearward surface 21 of the heel portion, which surface is' concavely curved to substantially conform to the curvature of thepole. is provided a transversely disposed tooth-like rib 28 adapted to dig into the pole upon securing the guy hook thereto, as will presently more fully appear.

Spurs 29-29 are provided intermediate the upper and lower ends of the rearward edges 26 of the intermediate portion for digging into the pole, and similar spurs 30-30 are formed upon the heel portion in spaced relation at the sides of the large conical spike 20. These spurs are outwardly spaced from the central vertical plane passing through the axis of the through bolt hole 19 and the conical spike 20, so that when they dig into the wood of the pole they provide clampingmeans to resist splitting along the central vertical plane passing through theaxes of the through bolt and conical spike.

Referring to Figs. and 6, the pole 31 is provided with a diametrically extendinghole 32 for the through bolt 33, the threaded ends of which project from the ends of the hole 32, a curved washer 34 being engaged upon one end ofthe-boltand secured by a nut 35, and the guy hook of the invention being engaged upon the other end. The through bolt is engaged through the hole 19 of the hubportion and the nut 36 upon the end of the through bolt is tightened against the bearing surface 17 to the point so that the inclined surface 25 becomes imbedded inthe wood of the; pole and the vertically disposed edge surfaces 26 come into firm contact therewith. At the same time the large conical spike 20 is driven into the pole by striking the, drive head 21 with a hammer or'the like. As the nut 36 is tightened the spike 20 is driven further into' the pole until the spurs 29 and 30 and the rib; 28- imbed themselves therein. When so installed, the, horizontal axis of the spike 20 is parallel with the, horizontal axis of the through bolt 33, and both lie in a plane substantially radial to the vertical pole axis.

It will be observed that the inclined surface 25' of the. hub portion acts as a wedge between the pole. 31 and the nut 36 in surrounding relation to the end of the through bolt, and which will effectually resist downward movement of the guy hook upon the imposition of a vertical component of force thereon such as results from the pull of a guy cable. Also it will be observed that the imbedding of the inclined surface 25 in the pole through tightening of the through bolt causes the structure 'of e w o f h p e o e impa te r c m- P ss d. in s rr unding relat n to. the thr ugh o t there.-

At the lower edge of the heel portion 11' there The spike 20 is centrally positioned with respect 4 by substantially increasing the resistance to splitting, such as mightresult from a downward bending of. the through bolt into the wood of the pole.

The spurs 29 and 30 provide substantial resistance to downward slotting movement of the guy hook, and also act as clamps at each side of the central vertical plane of the pole passing through the axes of the through bolt and the conical spike, providing additional resistance to splitting. The transverse rib" 28 digs into the pole along a transverse line directly beneath the conical spike providing further resistance to splitting. A loop 37 of the guy cable is engaged over the hub portion within the groove 24- and iscarried. forward at the desired guying angle beneath the respective hook portions, 23..

The wedging action of the guy hook is such that it becomes, in effect, a substantially fixed part of the pole, so that the vertical component of the load imposed thereon is taken to a large extent directly by the guy hook and transferred to the pole, with the result that bending strain on the through bolt is greatly reduced and substantially all of the strain thereon is resolved into axial tension. The effect of the wedging action is to provide increased resistance as the load is increased, so that slotting down on the pole. will be resisted under normal loads, as well asunder loads substantially in excess of normal, thus providing a larger factor of safety. While the wedging action of the guy hook with respect to the surface of the pole and the nut provides substantially positive resistance against downward'movement on the pole of the bolt, additional resistance is provided by the cooperative action of the heel portion, the large conical spike, and the spurs. In this regard-it should be noted that because the spikeis integral with the heel portion of the guy hook, a loose condition is neither present nor can develop between the spike and the body of the buy hook, with the disadvantageouselectrical and mechanical affects above noted. Addition-ally, the spaced side edges 26-26 providefirnr contact alongsubstantially spaced vertical lines with the pole surfaces of different diameters and surface contours, thereby effectually resisting turningmovement of the hook in'the event that unequal side strains are imposed thereon.

In manufacturing the guy hooks from malleable iron, the conical spikes aresubject to breakage during the process of conversion from brittle white iron to malleable iron. This is true also as the result of normal handling. In order to minimize loss from this cause, the drive head portion 21 is preferably cast with a drill centering-recess 38 inertial-alignment with the spike 20. In the case of a guy hookhaving a broken spike, as shown in Fig. 7, a drill 39 may be centered in the recess 38, anda hole- 40 drilled through the heel portion for receiving a separate spike or lag screw. As the hole is drilled the broken spike is removed. The diameter of the base line 41 of the spike is slightly smaller than the diameterof the hole, thus insuring complete removal of the'spike. For example; the base of the spike'were /2" the drill size would be ofthe order of In order to provide differential designations, before and after drilling, an X or similar designation 42 is cast on the drive head 21, so that it will be automatically removed upon removal of the broken spike.

What is claimed is:

In a guy hook for attachment to a wood transmission line. pole or the like, an upper hub portion having a through bolt receiving passage having an axis normally perpendicular to the vertical axis of said pole, a lower pole engaging heel. portion, an intermediate connecting portion extending between said hub and heel portions, a rearward'ly projecting conical spike member integral with the rearward side. of said heel portion having its axis parallel to,- and lying in the same vertical plane as the axis of said passage, and a forwardly projecting drive head: portion integral with the forward si'd'e of said heel portion andv having its center coinciding with.v the axis 5 6 of said spike member whereby blows centered upon said References Cited in the file of this patent head portion are transmitted through said heel portion UNITED STATES PATENTS directly in line with the axis of said spike member to 143 441 kin O 7 1873 drivesaid spike member into said pole and to move 332369 5 zgi 1885 said integrally connected hub portion toward said pole 5 1,048,706 Kleinhesselink Dec. 12

in a direction parallel to the axis of a through bolt engaged in said through bolt receiving passage, said drive head portion having a drill centering recess having its center coinciding with the axis of said spike member.

1,071,868 Blackburn Sept. 2, 1913 2,643,428 Jenne June 30, 1953

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