US2725991A - Devices for setting up telephone and the like poles - Google Patents

Description

Dec. 6, 1955 K. o. MAENPAA DEVICES FOR SETTING UP TELEPHONE AND THE LIKE POLES Filed ma 8, 1953 Kaila Oiva Maahpaa.

' IN ENTOR CZMMLQ W ATTORNEYS DEVICES FOR SETTING UP TELEPHONE AND THE LIKE POLES Kalle Oiva Miienpiiii, Hameen Laani, Lamrni, Kirkonkyla, Finland Application May 8,1953, Serial No. 353,769

Claims priority, application Finland May 26, 1952 3 Claims. (Cl. 214-3) This invention concerns an improved device for the setting up of telephone or the like poles of substantial girth and weight in pits or holes previously prepared for the reception thereof.

Telephone poles, poles for carrying electricity supply power cables and so forth are, by their very nature, bulky, weighty and cumbersome objects to handle and if handled by an insufiicient number of personnel, can prove dangerous should they slip or fallwhen being raised from or lowered into the ground.

It is therefore one object of the present invention to provide a device for the setting up of such poles, which will provide a safe and reliable means for the handling thereof.

The economics of the telephone, electricity distribution and other industries where overhead lines must be carried by a series of spaced poles, are greatly affected by the number and size of poles required, and in turn, upon the number of personnel required when such poles are initially to be set up.

It is a further object of the present invention to provide a means for simplifying such operations and reducing the number of personnel required to handle individual poles.

It is a still further object of the invention to accomplish such simplification by means of sheer legs and a windlass, the latter being detachedly carried by the pole itself.

The features of my invention which I believe to be novel and patentable are set forth with particularity in the appended claims. My invention itself, however, to-

gether with further objects and advantages thereof, will be understood in detail by a reference to the following description and to the accompanying drawing, which shows a typical preferred embodiment of my invention, and which is, in fact, a general perspective view of the lifting device carrying a pole intended to be lowered into a previously prepared pit or hole.

The lifting device includes a pair of sheer legs 2, 3, which are pivoted at their upper ends 4, and at their lower ends are sharply pointed the better to enable them to engage with the ground. To prevent the sheer legs 2, 3 from sinking too deeply into the ground under the weight of a pole, the regions of these legs immediately above the tapered ends are provided with flanges or plates 5 and 6, fixedly secured to said legs and adapted securely to abut the ground. The legs 2 and 3 may be of any suitable material, for example, of steel, and moreover may be of any required shape, such as tubular. It will be understood, of course, that if the device is intended primarily for lifting relatively light weight poles, the sheer legs 2 and 3 may be of a light weight material, such as aluminium alloy. Again, where an exceptionally rigid and strong structure is required, the legs 2 and 3 may each comprise several separate parallel tubes suitably spaced apart and joined together at the ends.

Around a pulley 7 freely secured to the pivot 4 of the legs 2 and 3, is passed a rope, chain or the like 11, to one end of which is secured a further pulley 8 from which depends a hook 9.

A windlass 12, comprising a shaft rotatable by means of a handle 15 and disposed between two end plates 12a spaced apart as by spacer bars 16, 17, is secured to the pole 1 at the base region thereof by means of two loop members or ties 13, 14, of rope, cable, chain or the like. The ends of the loop members 13, 14 are secured to the end plates 12a on either side of the pulley 1 by means of lugs 20, through which may be passed means detachably engageable with said end plates.

The free end of the rope 11 is then passed around the windlass shaft and secured thereto. The windlass 12 is located on the pole 1 at a point sufliiciently above the bottom end thereof to ensure that, when said bottom end is lowered into the previously prepared pit or hole 18, said windlass will still remain just clear of the ground. The hole 18 may be protected by an upright board or plate 19.

A further loop member or tie 10, detachably arranged around the pole and displaced from the centre of gravity towards the upper end of the pole, is engaged by the hook 9 of the pulley 8.

In use, the bottom end of the pole 1 is placed slightly projecting over the hole or pit 18. The hook 9 is engaged with the previously arranged loop member or tie 10, and the sheer legs 2 and 3 are set up at a suitable distance rearwardly of the said loop member or tie. The windlass 12 having been secured by means of the loop members 13, 14 to the pole 1, the handle 15 is rotated by the operator, and the pole 1 will begin to rise, with its lower end bearing on the edge of the hole 18. Ultimately, the pole will assume a substantially vertical position and at or rather before this instant, the sheer legs 2 and 3 may usefully be tilted somewhat backwardly by means of a rope fastened thereto. The pole 1 is thus raised into a position where it will slip freely through loop members 10, 13 and 14 to occupy its intended position in the pit or hole 18.

The device, according to the invention, may be efl'iciently employed by only two operators, the one attending to the operation of the windlass and the other guiding the pole during the raising thereof.

It will be understood, of course, that the windlass 12 may be provided with a reduction gear disposed between the manual handle 15 and the shaft on which the rope or the like 11 is wound, and such shaft may indeed itself be in the form of a drum. Similarly a brake may be provided, acting for example on the reduction gear and enabling a better control of the pole to be effected during lifting thereof. Again, although the loop members 13 and 14 have been described as being detachably fastened at their ends to the plates 12a, they may, in fact, be

permanently fastened to these plates, and may be broken instead at a point intermediate their ends, as by a quick release locking device.

In general, therefore, although I have herein shown and described a preferred embodiment of my invention, it'is manifestly capable of modification and variations without departing from the scope and spirit thereof. I do not, therefore, wish to be understood as limiting this invention to the precise embodiment herein disclosed, except as I may be so limited by the appended claims.

I claim:

1. A device for setting up, in holes previously prepared in the ground, poles of substantial girth and weight, in-

cluding a pair of sheer legs, a first pulley means carried by said legs, a second pulley means, a tie member releasably secured around a pole at a region above the centre of gravity thereof, said second pulley means being engageable with said tie member, a windlass secured detaehably to the base region of said pole, and a rope carried by said Windlass, the free end of said rope passing over both of said pulley means and being fixed with respect to one of said pulley means, the effective length of said rope being varied by operation of said Windlass whereby operation of said Windlass to shorten the effective length of said rope is effective to raise said pole towards a vertical position.

2. A device for setting up, in holes previously prepared in the ground, poles of substantial girth and weight, including a pair of sheer legs, a pivot at the upper ends of said legs and joining said legs together, a first pulley secured freely to said pivot, a second pulley, a book carried by said second pulley, a flexible loop member engageable around a pole in a region above the centre of gravity thereof, said hook being engageable with said loop member, a Windlass comprising two spaced end plates and a shaft rotatable therebetween, two further flexible loop members adapted to encircle said pole and detachably secured at each of their ends to said end plates to secure said Windlass to said pole at the base region thereof, a rope secured at one end to and carried by said rotatable shaft and at the other end passing through said second pulley, up to and over said first pulley and finally secured to said second pulley, whereby operation of said Windlass will cause the eflective length of said rope to be shortened, and said pole to be raised to an upright position.

3. A device for setting up, in holes previously prepared in the ground, poles of substantial girth and weight, including a pair of sheer legs pivotally connected together at the upper ends thereofisaid legs each being tapered at their lower ends to enable them firmly to engage with the ground, flange plates secured to said lower ends to determine the depth of their engagement with the ground, a first pulley secured freely to said pivot, a second pulley, a hook carried by said second pulley, a flexible loop member engageable around a pole in a region above the centre of gravity thereof, said hook being engageable with said loop member, a Windlass comprising two spaced end plates and a shaft rotatable therebetween, two further flexible loop members detachably secured at each end thereof to said end plates to secure said Windlass to said pole at the base region thereof, a rope secured at one end to and carried by said rotatable shaft and at the other end passing through said second pulley, up to and over said first pulley and finally secured to said second pulley, whereby operation of said Windlass will cause the effective length .of said rope to be shortened, and said pole to be raised to an upright position.

References Cited in the file of this patent UNITED STATES PATENTS 1,574,147 Franklin Feb. 23, 1926

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