US1987281A

US1987281A - Pole lock

Info

Publication number: US1987281A
Application number: US625797A
Authority: US
Inventors: Jefferson J Briggs
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-07-29
Filing date: 1932-07-29
Publication date: 1935-01-08
Anticipated expiration: 1952-01-08

Description

J. J. BRIGGS POLE LOCK Jan. 8, 1935.

Filed July 29, 1932 Inventor Patented Jan. 8, 1935 PATENT OFFi-cE" POLE LOCK Jefierson J. Briggs, Minneapolis, Minm Application July" 29,1932, Serial Nmtzsasv v Claims. (o zin -63y This invention relates to pole locks. Objects-of this invention are to provide a de vice foruse with" lamps suspended by pulleys,

such as from a mast armorcenter suspension- 51' construction, which is so madethat the device iscomposed essentially of twonormally interengaging-V portions, one ofwhichiscarried by the free end of the-chain or rope which suspends the lamp, and the other of which is attached to P the pole, the device being so-made that the two parts may be readily locked together.

Further objects of this invention are to provide lock-ingtmeans whichis so constructed that it prevents-unauthorizedtampering or releasing,

1 which can only bev released by authorized persons equipped with a: suitable tool: or instrument, in whichtheilower endof the device is provided with-a loop which-is always; free even in its attached position, and therebypermits the operator to hookon his extension line without first detachingithe device from the polea Further objectsare to -provide a construction having the above characteristics which .never-' theless is very simpleandwhich has no fragile, and no exposed parts ethat may be readily dam' aged'by stones or by being struck.

An embodiment of the invention is shown in the; accompanying drawing, in which:-

Figure 1 is-a fragmentary view of a pole with thedeviceattached thereto;

Figure 2, is a sectional View drawnto an ,enlargedscale and taken on the line 2-2 of Figure 1, vsuch View omitting the chain. v Figure 3..is a fragmentary view from the inner side of the device with the cover plate or chain locking plate removed, parts" being broken away and in section. o I I Figure dis a fragmentary detail showing the manner in which the device is unlocked from the pole.

Referring tov the drawing, it will be seen that the device comprises an anchoring" member 1 which is attached'to a pole'2by means of bolts orlag screws 3. I Preferably the member 1 is slightly transversely curved to fit the' curved face of the pole.

.The member 1 carries a-centrally located stud 4 which is rigidly attachedthereto and-which is provided withan enlarged'cylindrical threaded portion 5 andwitha reduced stud orprojecting endfi.

The chain oricable receiving member 7 is provided withan annular or elliptical recessed portion 8 opening towards its innerrside and adapted to receive the chain or cable 9' in the manner shown in Figure 3. The side walls 10 surrounding the recess 8 are provided with an uppernotch 11 and a lower notch 12. The lower notch 12 may, if desired, and as shown on the drawing, be'largerthan the'upp'er notch 11. The central portion is providedwith a raised inwardly located 'bos'si 13 which is apertured and threaded andreceives the screw 14. V v

The chain-or cable 9 is passed through the uppernotch- 11 and is laid or wrapped around the-central: boss or inwardly projecting portion 13., as shown-in Figure 3. Thereafter the. cover plate or-cablelocking plate 15 is positioned: over the chain -and is held in place by the screw 14,as shown most clearly in Figures zand 3. The head 16 of the screw is on theinner sideof the coverplate or. locking plate 15 and is consequently not accessible to anyone who desires totamper with the device; Therefore, it isclearthat the cover plate cannot-be released-byan unauthori'zed person, and the chain or cable cannot, therefore, be detached fromthe'member 7. y Y

Itis to be noted also that-inthe event a chain is used, one of thelinksisprefrably shouldered against-the upper portionof the wall 10, as shown in Figure, 3. Itis-tobe noted particularly that the cover plate 15 is provided with anupper ear 1 and alarger lowerear: 18 whichrespectively fit into-the notches-1L and 12, and thus prevent the cover plate from turning. in additionto this, it causes-the proper alignment of the cover plate with-the recessedportion and insures the proper relative positioning of Y these parts, sothat the-cover plate maybe draw-ninwardly'flush with the inner surface of-the member 7. In addition to this, the upper tongue 17 presses downwardly against'that portion ofthe chainor cable which passes through the notch 11, and-tightly-anchors the chainor cable in the Thelower portion of themember 7 is provided with an elliptical or "elongated looped member 19 within which is located the attaching nut or attaching member'20; This attaching member is provided with-anannular recess 21 in the opposite sides of which the arms of the portion 19 loosely fit, thereby allowing free rotation of the member 20, butpreventing removal of-the member 20-from the looped portion-19.-

' In addition to this, it is-apparent from Figures 1 and Z-that the looped member 19 wedges against the locking member 20 and prevents the locking member 20'from resting at -the bottom portion of the'loop. This allows roomfor the free insertion of thehook indicated in dotted lines at 22, which-isattached'to the operators extension rope23, while the device is locked in place to the pole. 'This is shown most clearlylini-igure2.

The'nut 'or attaching member 20 is internally threaded and-is screwed upon the threaded portion 5 of? the fixed-stem. This nut 20 is cylindrical in contour and is provided; withone or more: radial recesses 24 adapted' to receive the hooked end 25 of a spannenwrench-ZG, as shown It is to be noted that the threaded hole in the nut 20 does not extend completely through the nut, but that its bottom strikes the projectingstub or stud 6 of the pin and therein enables the nut to be tightly locked in place without damage T to the threads either of the pin or of the-nut.

When the operator desires to lower the lamp or other suspended member, he merely hooks the" hook 22 in the lower free end. of the loop 19 and thereafter unscrews the nut 20. There isno danger of the lamp dropping, as it is already attached to the .extension'rope 20 of the operator.

In orderto avoid needless repetition, the chain or cable will-hereinafter be referred to asia cable, it being understood, however, that this term is used not in aspecific sense but in a generic sense to covera chain, rope, cable, or other suspension member. Further; it is to be understood that the expression pole is intended to cover any fixed member'such as a wall or-a pole, depending, of course, irom what point the lamp is suspended.

It is apparent also that the device has no projecting or fr'agile parts that can be damaged by stones or' by being struclnbut instead is of strong substantial construction and also is very simple and is easy to make.

Although this invention has been described in considerable detail, it is to beunderstood that such description is intended as illustrative rather than limiting, as the invention may be variously embodied and is to be interpreted as claimed. a

I claim:.

1. A polelock for a cable comprising an anchoring member rigidly attached to the pole and having anoutwardly projecting threaded stud, a cablev receiving member securely attached to the cable and having adownwardly looped portion, and a nut revolubly and permanently carried by said cable receiving member and internally threadedfor cooperation with said threaded stud. I

2. A polelock for a cable comprising an anchoring member rigidly attached to the pole and having an outwardly projecting threaded stud, a cable receiving member securely attached to the cable and h'aving a downwardly looped portion, and af nut revolubly and permanently carried by saidcable receiving member and internally threaded for cooperation with said threaded stud,said nut having an annulargroove formed therein, said cable receiving member havinga looped portion fitting within the annular groove of saidnutand continuing downwardly to form a downwardly extending continuation of said looped portion spaced at all times from said nut for the reception of a hook.

3. A pole lock for a cable comprising ananchoring member adapted for attachment to a pole and having an outwardly projecting threaded stud provided with a reduced stub portion projecting therefrom, 'a cable receiving member, a nut revolubly carried by said cable receiving member'a'nd having an internally threaded aperture and adapted to cooperate with said threaded stud, said aperture extending only part way through saidnut and leaving a bottom wall adapted to contact with the projecting stub portion of said threaded stud when said nut is screwed tightlyin place. I

4. A pole lock for a cable comprising an anchoring member adapted for attachment to a pole and having an outwardly projecting threaded stud provided with a reduced stub portion projecting therefrom, a cable receiving member, a nut revolubly carried by said cable receiving member and having an internally threaded aperture and adapted to cooperate with said threaded stud, said aperture extending only part way through said nut and leaving a bottom wall adapted to contact with the projecting stub portion of said threaded stud when said nut is screwed tightly in place, said nut being provided with an annular groove formed therein, and said cable receiving member having a looped portion fitting within the annular groove of said nut and converging towards the lower end of the looped portion, whereby the lower end of the looped portion is spaced from said nut when the device is in position.

5,. A pole lock for a cable comprising anchoring means adapted for attachment to a pole, a cable receiving member having means interlocking with the said anchoring means, said cable receiving member having an annular recess adapted to receive the cable and having a notch through which the cable projects, and a cover plate closing said annular recess and clamping said cable in place, said cover plate having an ear positioned in said notch and bearing upon said cable and tightly anchoring said cable in the notch.

6. A pole lock comprising anchoring means adapted for attachment to a pole and having a projecting threaded stud, a cable receiving member having a downwardly extending looped portion, an internally threaded nut adapted to cooperate with said threaded stud and revolubly positioned within the looped portion of said cable receiving member, said nut having a substantially cylindrical exterior surface and having a radial aperture, said looped portion converging towards its lower end to provide a part spaced at all times from said nut, said cable receiving member having its upper end provided with a peripheral wall surrounding an annular space and having an upper notch through which the cable may be passed, the free end of the cable being receivable within the annular space, a cover plate adapted to enter the annular space and having an ear adapted for positioning within the notch in the peripheral wall, and a headed locking screw passing through the cover plate with its head located adjacent said cover plate, said screw being threaded into said cable receiving member.

'7. A pole lock for a cable comprising anchoring means for attachment to a pole, a cable receiving member having means interlocking with said anchoring means to hold a predetermined face of said cable receiving member presented towards the pole when said means are interlocked, said cable receiving member including two parts,

one of which constitutes a body portion provided with an annular recess adapted to receive a cable, and the other of which constitutes a cover plate and jointly enclosing that portion of the cable within said annular recess, said cover plate contacting with the margins of the body portion surrounding the cable receiving recess, and a headed screw locking said two parts together with the head of said screw on the side of said cable receiving member presented towards said pole.

' JEFFERSON J. BRIGGS.