US2358577A

US2358577A - Device for lifting weights

Info

Publication number: US2358577A
Application number: US499346A
Authority: US
Inventors: Morris H L Jacobsen
Original assignee: American Telephone and Telegraph Co Inc
Current assignee: AT&T Corp
Priority date: 1943-08-20
Filing date: 1943-08-20
Publication date: 1944-09-19
Anticipated expiration: 1961-09-19

Description

p 1944- M. H. L. JACOBSEN DEVICE FOR LIFTINQWEiGI-ITS Filed Aug. 20, 1943 INVENTOR L. Ja'cobsen/ R 4 O as.

ATTORNEY Patented Sept. 19, 1944 Morris: H.- L-. J acobsen, .Guilfori: Gonn... assignor:

America-n Telephone and Telegraph ,(loml 1 .pany, a corporation of NewXork I m 7 Application August20, 1943, Serial No. 3.0laims; (o1. 254.--139 I Thisinventionrelates to aninstrument for lifting or supporting weights; or, in other words, the type of instrument often referred' to as a. gin.

Theinstrument of this invention is particularly adapted for use i'n'lioisti'ng or supporting aerial conductors, such as 'cablesusu'ally supported by telephone poles. One'otthefeatures of the' instrumentof the invention is that it is particular- 1yadapted for hoisting or supporting conductors, suchas cables, on different kin ds of. poles, such as a straight-line pole or a pole located at a cor} ner of a line. A further feature of theinstrument or tool of, the ihventionfresidesin the fact that jit may be'used at va rious. positions on the ploleas', for example, at the top of thepoleor at a point below'thegtopof the pole..' A further feature of the instrument of the 'inventi-orifis that it may advantageously be used on joint-use poles,

namely, poles supporting power lines" as well' as communicationrlines. Otherfeatures andobjects of'the invention will appear more fully from the detailed description thereof hereinafter i -q .j R

' Thefinvention may; be more fully;understood from the followingdescription-together:with the accompanying drawing-in the Figures '1 -to--'6 of which theinventionis'illust'rated." In Fig; 1 is shown the gin of this invention. is illustrated with hoisting me'cha nism-f'for'use in lifting a cable on a straightline polefi In Figs. L

3 and 4 the gin is illustrated with hoisting mechanism for use in lifting cables on different types of corner-poles. In Fig. 5 is shown in detail a standard cable shifting tool which could be used with the gin under conditions illustrated in Figs. 3 and 4. Fig. 6 is a sectional view looking down on a portion of the top of the gin shown in Fig. 1. Similar reference characters have been utilized to denote like parts in all of the figures.

In Fig. 1 is shown the gin device of the invention. It consists of an oblong member I which may be fixed in a vertical position on a supporting member, such as a telephone pole, by means of bolts inserted in the

bolt holes

2 and 3. If the supporting member has a rounded surface, such as a telephone pole, the oblong member might well be made from a channel bar. Affixed to the oblong member in a horizontal position with respect thereto and near the top thereof would be the cross-bar 4. The extremities of the cross- Iri Fig. 2 the gin bar 4 would be bent to form an angle with respect the sheaves 5 and 6. This is more clearly shown in Fig. 6 which is a sectional'fview looking down on a portion of the top'of the' ginshown in Fig. 1; Bracingmemb'ers" l and 8 would be aflixed to the sidesfof the oblong member'and'connectedto the extremities of'thecross-barby means'of the-pins 9 and IUfA device-l3, such as an" eye bolt', would be afiixed to the; oblong member below the cross-bar and sheave sff Guard members I1 and I2 wouldibe pivotally" attached to the top of the" cross-bar and'arrangmnts provided to attachthem to-the bracing 'members land 8.

In Fig Zfthe ginfisshOwn c0operating wi'th' a chain hoist, to lift or sup mechanism; suchas w I port a cable mena straight-line telephone pole I8. The chain hoist---n'i echanismcomprises a chain M with a hook" l5 atrone end thereof." The hook l5 would beaffi'xed to the'suspension'strand of the cable l9? The ichain l4" would be passed over the sheave-frand would pass through ratchet mechanism operated by a lever 16. This ratchet -mechani'sm* would be attached by th'e'hook" If! to the eye bolt 'l 3 affixed to the oblong: member I. Obviouslyother types ofhoisting' mechanism,

such as ajrope; operated'device, could be used-in place-{of the e a n' hoistg i ri gz thejginf'is shown as placed atthe top; of theipole I8. t In Fig. '3 the; gin is shown co'operating w'ith mechanism tol-ift or support a -'cable 19 on "a corner telephonepole with'respect to which the pull of the cablewouldbe towards the pole. On

this type ofpole ibis advisable to use'the standardcable shifting tool shown-i Fi'g'5fin cooperation with thehoisting'mechanism-i -'The standard cable shifting tool comprises a hooked member 20. The hook [f the hoisting mechanism would I shown, and as the roller mechanism 2| would bear against the pole, the cable shifting tool would assume the position shown in Fig. 3. Accordingly, when the hoisting mechanism operates in cooperation with the cable shifting tool, it will serve to exert a pull away from the pole. In Fig. 3 the gin is shown on apole which may be jointly used not only for supporting a cable but also for supporting power lines by means of the mechanism 25. In this case the gin is placed at a safe distance below the power line mechanism 25, as shown. a

In Fig. 4 the gin is shown cooperating with utilized. The members 22 would be insertedthrough the eye holes 24 and 24of the bar 23, The cable shifting tool would then be attached to the bar 23. In this case, due to the curvature of the cable shifting tool and the roller mechanism,

2|, the pull in hoisting the cable would be away from the pole.

In Figs. 3 and 4 the gin is shown on poles which may be jointly used not only for supporting a cable but also for supporting powerlines by means of the mechanism 25. When used in this connection the gin of theinventionhas certain advantages over the prior art. In hoisting cables in certain arrangements of the prior art a lashing rope would first be placed around the pole.

The hook l5 of the chain hoistmechanism would be attached to the lashing rope. The hook I! fixed to the ratchet mechanism wouldbe attached to the member 20 of the standard cable shifting tool. The cable could then be hoisted toward the lashing rope but could. not rise above a level I slightly below the hook I! on the ratchet mechanism. With the gin of this invention the cable may be raised to a level just below the sheaves, which level is above that of the hook I! of the ratchet mechanism; For the sake of the linemans safety the apparatus must always be placed on the pole so that the ratchet mechanism (particularly the lever thereof) is at a certain distance below the power lines. Accordingly, with the gin of this invention the ratchet mechanism may be kept at a safe distance from the power lines while at the same time the cable may be hoisted closer to such power lines than heretofore.

While the invention has been disclosed as embodied in certain specific forms which are deemed desirable, it is understood that it is capable of embodiment in many other and widely varied forms without departing from the spirit of the invention as defined in the appended claims.

What'is claimed is: H 1 e V a 1. A gin'for hoisting materials comprising an oblong member, means for afiixing said oblong member in a vertical position to an upright member, a flat surfaced cross-bar aflixed in a horizontal position to the top portion of said oblong member so that the flat surface of the cross-bar is in the same plane as the main surface of said oblong member, said cross-bar having its extremities bent toward said upright member to form an angle with respect to the central portion of said cross-bar, sheaves aflixed to the extremities of said cross-bar and adapted to cooperate with hoisting mechanism, and means on said oblong member whereby said hoisting mechanism may be aflixed thereto below said cross-bar.

2. A gin for hoisting aerial cable comprising an oblong member, means for aflixing said oblong member in a vertical position to a pole, a flat surfaced cross-bar afiixed in a horizontal position to the top portion of said'oblong member so that the flat surface of the cross-bar is in the same plane as the main surface of said oblong member, sheaves aflixed to the extremities of said cross-bar and adapted to cooperate with hoisting mechanism, and means on said oblong member whereby said hoisting mechanism may be aflixed thereto below said cross-bar, the extremities of said cross-bar being bent partially around said pole so that the position of the sheaves on said extremities will cause said hoisting mechanism to exert a vertical upward pull at a side of the pole with respect to the position thereon of said oblong member. V r 3. A gin forhoisting materials comprising an oblong member, meansfor affixing said oblong member in avertical position to an upright member, a flat surfacedscross-bar. aifixed in a horizontal position to the top portion of said oblong member so that the flat surface of the cross-bar is in the same plane as the main surface of said oblong member,bracing members aiiixed to said oblong member and the extremities of said crossbar, guards afiixed to the central portion of said cross-bar and to said bracing members said cross-bar having its extremities bent partially around said upright member, sheaves affixed to the extremitiesof said cross-bar and adapted to cooperate with hoisting mechanism, and means on said oblong member whereby said hoisting mechanismmay be affixed thereto below said cross-bar.

MORRIS H. L. JACOBSEN.