US2241695A - Hoisting device - Google Patents

Description

May 13, 1941. =1. 0. BARTON HOISTING DEVICE Filed March 15, 1940 fizz/rzfon" James U/e/z .Bar/ozz @M @0449 WM 610% Patented May 13, 1941 2,241,595 HoIs'rING DEVICE James Olen Barton, Havana, Ill., assignor of forty per cent to T. M. Shultz, Beardstown, 111.

Application March 15, 1940, Serial No. $24,069

1 Claim.

is at the present time customary for the lineman to climb to the top of the pole and put a sling or rope around the latter near the top thereof and then attach a block and tackle or pulley to the sling for use in lifting the transformer. There are, however, certain objections to and dangers in the use of this practice and among these are the fact that it endangers the linemans safety in that it requires him to climb through and work close to the high voltage pow er transmission wires at the top of the pole.

Another difliculty which is experienced in the use of the above-mentioned practice resides in the fact that it is difficult for the lineman to keep the transformer spaced from thesurface of the pole during the hoisting operation with the result that the transformer is 'apt to scrape against and damage the transformer or its protective equipment, attached thereto, during the hoisting operation.

Accordingly, it is an object of the present invention to provide a hoisting device which is.

especially adapted for use in hoisting transformers or other heavy objects onto electric power transmission line poles and in the use of which the above-mentioned and other difliculties heretofore experienced are eliminated.

Another object of the present invention is to provide a hoisting device which is especially adapted for use in hoisting transformers .up electric powertransmission line poles and in the use of which this may beaccomplishedwithout requiring the linemen to climb upwardly through or to work in close to the live wires during the operation of fastening a sling about the pole prior to attaching the block and tackle or pulley.

Another object of the invention is to provide a new and improved hoisting device in the use of which a heavy object such, for example, as a transformer, and its protective equipment, attached thereto, may readily be kept out of contact with the surface of the pole during the operation of hoisting the object up the pole.

A further object of the invention is to provide a new and improved hoisting device which may be used for hoisting various other heavy objects and devices, in addition to electric power transformers, into an elevated position, including use on flag poles, in logging operations and the like.

An additional object of the invention is to provide a new and improved hoisting device which, in one embodiment of the invention, is

7 especially adapted for use upon old wooden poles and which is so constructed that in use it will prevent any substantial damage to the pole by theholsting device during the hoisting operation;

Other and further objects of the present invention will be apparent from the following description and claims and are illustrated-in the accompanying drawing which, by way of illustration, show preferred embodiments and the principle thereof and which I now consider to be the best modes in which I have contemplated applying that principle. Other embodiments of the invention embodying the same or equivalent principle may be used and structural changes may be made as desired by those skilled in the art without departing from the present invention and the purview of the appended claim.

In the drawing,

Fig. 1 is a side elevational view illustrating a preferred embodiment of the new hoisting device and showing the same applied in position of use upon a wooden pole;

Fig. 2 is a top plan view of the hoisting device which is illustrated in Fig. l;

, Fig. 3 is a side elevational view illustrating a modified form of the new hoisting device;

Fig. 4 is a top plan View of the form of the new hoisting device which is illustrated in Fig. 3;

Fig. 5 is a fragmentary sectional View on line 5-5 in Fig. 4; and

Fig. 6 is a fragmentary sectional view on line 6-6 in Fig. 5.

A preferred form of the invention is illustratedin Figs. 1 and 2 and comprises a hoisting device which is generally indicated at Ill and which includes a pair. of spaced gripping jaws l l which are preferably formed as steel stampings, castings, or otherwise, and which are joined at one end, as at I2, by means of welding or any other suitable manner; an opening l3 being provided in the end portion l2 of the device for reception of a hook I 4 of a conventional block and tackle device [5. Y

I The gripping jaws l I may be spaced'from each other adjacent their forward ends in any suitable manner and in the present instance are shown as being spaced by an apertured spacing member I Gthrough which a bolt l1, bearing a nut I 8, is projected.

Each of the gripping jaws H includes an enlarged end portion l9 and formed in the edge of each of these end portions I9 is a notched gripping surface 2!].

Attached to the bolt IT, at opposite ends thereof, and outwardly of the gripping jaws II, is a flexible element in the form of a chain 2| which is adapted to embrace a power transmission line pole or like object 22.

In the use of the form of the new hoisting device which is illustrated in Figs. 1 and 2 a lineman may carry the same to a point somewhat below the top of the pole 22 and, while holding the gripping jaws H in a substantially horizontal position, arrange the chain 2| around the pole 22, and secure the same in position upon the bolt H with the gripping jaws 20 in engagement with the pole 22. The hook 14 of the block and tackle device I5 may then be inserted through the opening 13, whereupon a transformer or other heavy object may be raised by means of the block and tackle device 15, and associated rope or cable 21, it being noted that as the transformer or other heavy object is raised the gripping jaws 20 firmly grip the pole 22.

It will be noted that in the use of the new hoisting device it is unnecessary for the lineman to climb to the top of the pole 22, and upwardly through the electric power transmission wires, in order to arrange the hoisting device ID in position of use, as has been necessary in connection with prior art devices used for similar purposes, and hence the present device promotes or enhances the safety of the lineman.

It will likewise be noted that as a transformer or like heavy object is raised by means of the block and tackle device I5 and rope or cable 21, such object is kept away from the pole 22 and out of engagement therewith, due to the fact that the hoisting device spaces the block and tackle l5 and rope or cable 21 away from the pole 22, and hence the object being raised is prevented from scraping against and damaging the transformer or its protective equipment, attached thereto. a

While the new hoisting device has been illustrated and described as being used for the specific purpose of hoisting transformers onto electric power transmission line poles it is to be understood that it may be used for hoisting other heavy objects of various kinds to the top of electric power transmission line poles, telephone poles, or for similar purposes and in analogous places. l

The teeth 20 at the lower end portion of each of the gripping jaws H, (as seen in Fig.1), are preferably somewhat longer or deeper than the teeth at the upper end portions of the jaws ll so that as the gripping member is pulled downwardly it will more firmly grip the pole or like object. I

A modified form of the invention is illustrated in Figs. 3 to 6, inclusive, and in this form of the invention those parts which are similar to the parts which are embodied in the form of the invention which is illustrated in Figs, 1 and 2 are given the same reference numerals followed by the letter a.

The modified form of the'invention which is illustrated in Figs. 3 to 6, inclusive, is substantially similar in construction to the form of the invention which is illustrated in Figs. 1 and 2 but differs therefrom in the fact that in this form of the invention a web 23 is formed integrally with the gripping jaws Ila and extends between the latter at the front of the hoisting device, this web 23 being located at the base of the teeth 200 on the gripping jaws Ha. It will be noted (Figs; 4 and 6) that the web 23 is slightly'concave inwardly in shape and this enables it to bear against the peripheral or external surface of a wooden pole, such as 22, and thus increase the eiTective gripping surface of the device.

It will likewise be noted, by reference to Figs. 4 and 6, that the form of the invention which is illustrated in Figs. 3 to 6, inclusive, differs from that which is shown in Figs. 1 and 2 in that a flange 28 is provided in each of the jaws Ila, and that these flanges 28 extend laterally beyond the sides of the jaws Ha so as to increase the effective gripping surface of the jaws' I la and of the teeth 20a which are formed therein.

Otherwise, however, the form of the invention which is illustrated in Figs. 3 to 6, inclusive, is substantially similar to the form of the invention which is illustrated in Figs. 1 and 2.

While I have illustrated and described selected embodiments of my invention it is to be understood that these are capable of variation and modification and I therefore do not wish to be limited to the precise details set forth but desire to avail myself of such changes and alterations as fall within the purview of the following claim:

I claim:

A hoisting device adapted to be secured to a vertically extending or upright support for lifting relatively heavy objects, comprising a member having an end portion adapted to have a block and tackle suspended therefrom, a flexible element attached to said member and adapted to encircle said upright support so as to secure said member thereto,. said member including a head portion having connection with said flexible element, said headportion including a pair of spaced gripping jaws each having an arcuateshaped row of gripping teeth formed thereon adapted to engage said upright support, and each of said gripping jaws and the said arcuateshaped. row of teeth formed thereon extending forwardly of and asubstantial distance below the said connection betweensaid member and said flexible element.

JAMES OLEN BARTON.

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