US2438746A

US2438746A - Hot line jumper stick

Info

Publication number: US2438746A
Application number: US645084A
Authority: US
Inventors: Garrison John Wesley
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-02-02
Filing date: 1946-02-02
Publication date: 1948-03-30
Anticipated expiration: 1965-03-30

Description

J. W. GARRISON HOT LINE JUMPER STICK March 30, 1948.

Filed Feb. 2, 1946 2 Sheets-Sheet 1 v(ma! 405M Weave; lijwz March 1948. J. w. GARRISON HOT LINE JUMPER STICK Filed Feb. 2, 1946 2 Sheets-Sheet 2 mu may eys Patented Mar. 30, 1948 STATES FATE-ENE FFEE My invention relates to improvements in hot line jumper sticks for picking up cold lines and permeating the same to high tension hot lines, the primary object in view being to provide a simply constructed, easily handled device icr establishing a temporary jumper connection between a cold line and a hot line with perfect safety and for the purpose of maintaining service over the lines preparatory to installing a permanent jumper connection between the same.

To the accomplishment of the above, and subordinate objects presently appearing, a preferred. embodiment of my invention has been illustrated in the accompanying drawings, set forth in detail in the succeeding description, and defined in the claims appended hereto.

In said drawings:

Figure l is a view in side elevation illustrating my improved hot line jumper stick in the preferred embodiment thereof and with the switch open,

Figure 2 is a similar view of the head section and parts carried thereby, drawn to an enlarged scale,

Figure 3 is a view in transverse section taken on a line 33 of Figure 2,

Figure 4 is a similar view taken on a line ii-e2 of Figure 2,

Figure 5 is a view in plan of the head section with the parts carried thereby,

Figure 6 is a view in transverse section taken on a line 6-5 of Figure 5 and drawn to a further enlarged scale,

Figure '7 is a view in transverse section, taken on a line 7-1 of Figure 5,

Figure 8 is a fragmentary view partly in plan and partly in longitudinal section and illustrat ing the manner in which the handle for the cold line clamp is adapted to be connected thereto.

Referring to the drawings by numerals, my improved hot line stick, as illustrated, comprises a head section I of any suitable length and thickness and which is preferably ylindrical and formed of oil impregnated hard wood for insulating purposes, and a handle section 2 of the same material. A rear end ferrule 3, of suitable insulation material, is fitted flush on the head sec tion I and riveted thereto, as at 4. A threaded axial stud 5 on the ferrule 55 for turning into a socket 6 in the front end of the handle section 2 provides for detachably connecting said sections together.

A hot line clamp l is provided on the front end of the head section I. The clamp '3 comprises a hollow shank 8 extending forwardly from said Section 5 and curving to one side of the section with a stepped socket forming rear end 8 fitting over the front end of said section l and riveted thereto as at It, i i. The shank 8 tapers forwardly and is formed with a flattened, longitudinally curved, clamping face if! on the same side of the head lection l as that toward which said shank is cin'ved, Opposed to the clamping face i2 is a flattened, rod-like, rearwardly tapering, clampmg finger is curved reversely relative to the curvature of the face 12 and diverging with respect .iereto. The clamping finger i is pivoted at its front end to the front end of the shank as at M, for movement toward the face 52 into clamping relation thereto. The clamping finger I3 is spring loaded to assume clamping relation. For this purpose, a bolt [5 is suitably extended transversely through the clamping finger and the shank 8 adjacent to the pivot It, to extend laterally from the shank 8, and a coil spring is provided on said bolt it between a pair of washers ii on the bolt, one of which is backed by a wingnut 18, and the other of which seats on a boss l9 on said shank. As will be clear, the shank 8 and clamping finger [3 form a rearwa dly opening hook on the head section 1 for yleldingly clamping lines between the and which is adapted to yieldingly open to accommodate and clamp lines of difierent sizes with a wedging action. The described clamp i has suitably fixed to the rear end a thereof, on the side of the head section i opposite that toward which the shank 3 curves, a lateral spring lip 223 for a purpose to be explained. The shank 8, clamping finger l3 and clip 23 are formed of brass to provide a good electrical conductor of high voltage current.

A bridge member 2| oi semi-circular crosssection and conductive metal, preferably brass, is secured by screws 22 to the head section I intermediate the ends of said section and on the same thereof as the clip The bridge member 2! is provided with a let al end clip 23 for cooperation with the oil 2?; to grip the ends of a suitable fuse member 24 of usual cartridge type, as shown. A pair of laterally spaced contact ears 25 are provided on the other end of the bridge member El and which form the teron one side of a knife-blade switch, the r parts of which will now be described.

Adjacent to the rear end of lead section l, and on the same side thereof as the bridge member BI, is an elongated shire-blade mounting preferably of arcuate cross-section and formed of brass, and which is secured to said section by screws 21 and provided with a pair of front end,

As will be apparent, the spring 32 urges the disc 29 and the knife-blade 3B in a direction to swing said blade into bridging engagement with the contact ears 25.

The disc 29 and knife-blade 89 are adapted to be cocked with said blade in disengaged position relative to the ears 25 to optionally maintain the knife switch open. For this purpose, the disc 28 is formed with a peripheral rear lugtt and the mounting 26 is provided thereon with a bar-like catch 81 of resilient steel fixed, by rivets 38, to said mounting and having a curved trip end adapted to snap over the lug 88 and to form a finger grip by means of which it may be retracted from over said lug to release the disc 2% and knife-blade 39, at will, for action by the spring 82 to swing said knife-blade 3!} into engagement with the contact ears 25 and thereby close the described switch.

The described knife-blade 30 is designed to be electrically connected to a' clamp 46 for hooking over a cold line, with a wedging action, and which is similar to the clamp 'I with the exception that it is of rigid construction and provided with a rear end pair of oppositel extending studs, as at El, for attachment of a handle section 22 thereto similar to the handle section 2. The handle section 42 is provided with a suitable end ferrule 23 secured thereon, as at 44, and fitting over the rear end of the clamp it to be turned thereon to engage bayonet slots, as at 35, in the ferrule with the studs 4! so that said handle section 22 may be interlocked with the clamp 62.

The connection between the clamp 68 and the described knife-blade switch comprises a braided, flexible, copper strip 46 having one end fixed on the stud 35 by a nut 41 and its other end imposed on the ferrule 3 and fitted to a binding post 48 projecting from said ferrule. A flexible jumper tape 49 has one end fitted to the binding post 48 and clamped against the strap '35 by a wing nut 58 on the binding post. The other end of the jumper tape 49 is suitably connected to the clamp 40 by means of a binding post 51 on said clamp and a wing nut 52 on said binding post.

The manner in which this described invention is designed to be used and operated will be readily understood. By means of the handle section 2, the hot line clamp 8 is hooked over and engaged with a hot line 53, as shown in Figure 2, and the cold line clamp 49 is similarly hooked over a cold line 54, as shown in Figure 1, by means of the handle 42, the knife-switch, of course, being held open by cocking of the knife blade 38 and disc 28 in the manner already described. With the

lines

53, 54 thus engaged, trip end 39 of the catch 81 may be released by a suitable implement sothat the knife blade 38 will be swung by the spring 32 to engage the ears 25. With the knife blade thus closed, the current will pass through the clamp i, fuse 24, bridge member 2|, knife blade 30 and strap 55 to the jumper tape 49 to be conducted by said tape to the cold line clamp 48 and cold line 52. As will be seen, by virtue of my invention, an open jumper line connection may be provided between the hot line 53 and cold line with good electrical connections at each end thereof and the jumper line then closed all with safety to the operator and no extra load is thrown on the hot line while the connection to the hot and cold lines is being made, the advantage of which will be manifest.

The foregoing will, it is believed, suffice to impart a clear understanding of my invention without further explanation.

Manifestly, the invention, as described, is susceptible of modification, without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

What I claim is:

l. A line stick for connecting a hot line to a cold line comprising an elongated head section of insulation material, a hot line clamp on one end of said head section, a handle extending from the other end of said head section for manipulating the same to engage said clamp with a hot line, a cold line clamp having a handle for manipulating the same to engage a cold line, a line of connection between said clamps including a flexible jumper tape, a switch in said line of connection mounted on said head section and including a pivoted blade spring actuated into switch closing position and adapted to be cocked to open the switch, and manipulative means for maintaining said member cooked and for releasing the same at will, said jumper tape including a short separate section attached at one end to said head section with its other end attached to said blade to one side of the pivot of said blade.

2. A line stick for connecting a hot line to a cold line comprising an elongated head section of insulation material, a hot line clamp on one end of said head section, a handle extending from the other end of said head section for manipulating the same to engage said clamp with a hot line, a cold line clamp having a handle for manipulating the same to engage a cold line, a line of connection between said clamps including a flexible jumper tape, a switch in said line of connection mounted on said head section including a pivoted member, spring actuated into switch closing position and adapted to be cocked to open the switch, and manipulative means for maintaining said member cooked and for releasing the same at will, said jumper tape being electrically con.- nected to said member to one side of the pivot thereof, and a fuse on said head in said line of connection between the other side of said switch and the hot line clamp.

JOHN WESLEY GARRISON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 7 Date 501,068 Haskins July 11, 1893 1,138,366 Everett May 4, 1915 1,238,597 Terzich Aug. 28, 191? 1,815,283 Alsaker et al. July 21, 1931 2,233,826 Allison Mar. 4, 1941