DE1089827B - Current draw, earthing or short-circuit rod for electrical overhead lines - Google Patents

Description

GERMAN

The previously known portable devices for grounding, short-circuiting and drawing current of overhead lines, contact wire lines, switchgear and the like are hook-shaped or fork-shaped. At least the one clamping pieces are movable and are brought into the clamping position by a lever linkage or threaded spindles. That Clamping from a distant location is not always easy; this is often the case with lever rods weak or too strong. In the latter case, the circumferential surface is damaged in the case of cables wound with cables the vein can even be damaged. A device is known in which two clamping pieces are rotatably connected to one another by a joint, and the rotatable clamping piece is brought into the operative position after pivoting into the plane of the stationary clamping piece. at With the known terminals, the contact-making that is brought about is not always satisfactory; or the removal is cumbersome because special actuating parts have to be handled.

The subject of the invention is a current drain, grounding or short-circuit rod for electrical overhead lines, in which the connection head clamp also consists of a gripping over the conductor wire, as a catch fork trained jaw and a spring-loaded counter-jaw. According to the invention the clamping jaw, which is designed as a catching fork, consists of one that can be slipped onto the rod sleeve-shaped shaft part with fork arms attached to it on opposite sides, the ends of which extend in the opposite direction, and between the fork arms in the shaft part the is electrical insulated counter-clamping jaw stored under the pressure of a likewise housed in the shaft part Pen stands.

The rod with clamping jaws designed in this way has the advantage over the known rods that they can neither be shaken by shaking the conductor nor by knocks against the terminal from below can hang out.

In the drawing, two exemplary embodiments of the subject matter of the invention are shown, namely shows

Fig. 1 is a side view of the clamp with clamp rod for conductors with a round cross-section,

Fig. 2 is a front view of the clamp, partly in longitudinal section,

FIG. 3 is a plan view of FIG. 2,

FIG. 4 shows a variant of FIG. 1 without a clamp rod,

5 shows a view of a second embodiment of the clamp for flat-profile conductors, partially in longitudinal section,

FIG. 6 shows a side view of FIG. 5,

7 shows a plan view of FIGS. 5 and

Current consumption,

Earthing or short-circuit rod

for electrical overhead lines

Applicant:
Josef Mäder, Weinfelden (Switzerland)

ίο Representative: Dipl.-Ing, A. Berglein, patent attorney,
Munich 22, Widenmayerstr. 49

Claimed priority:
Switzerland from 23 September 1957

Josef Mäder, Weinfelden (Switzerland),
has been named as the inventor

FIG. 8 shows a variant of FIG. 7.

The embodiment according to FIGS. 1 to 3 has a clamping jaw 1 designed as a catching fork with a sleeve-shaped shaft part 2 to which a rod 3 made of electrically insulating material is easily detachably connected by means of a bayonet catch 4. 5 is a copper braid connected to the shank part 2 made of brass for grounding, short-circuiting or drawing current. The two fork arms la, Ib have relative to one another to opposite sides projecting ends 1 c, which are curved in a circular arc shape. The fork arms la, Ib are made of copper and are connected to the shaft part 2 by brazing. In the shaft part 2, a hollow piston 6 is guided in a longitudinally displaceable manner, which carries a counter-clamping jaw 7 provided with a keyway-shaped pressure surface and is supported by a clamping spring 8. The latter is supported with its upper end against the counter-clamping jaw 7 and with its lower end against an adjustable abutment 9. The abutment 9 is longitudinally displaceable in slots 11 of the shaft 2 by two adjusting screws 10 acting on it and can be adjusted to the desired height. By adjusting the height of the abutment 9, a change in the bias of the clamping spring 8 is achieved. The spring travel of the parts 6, 7 is achieved by a stop screw 12 attached to the shaft part 2, which engages in a longitudinal slot 13 of the hollow piston 6 and secures it against rotation.

The rod 3 is inserted into the shaft part 2 of the connector head clamp. In order to prevent the connection

009 609/297

To achieve end-of-line clamp on the head L , the fork is attached from below to the head L that one fork arm 1 α is on one side and the other fork arm 1 b on the other side of the conductor. Passing the lead L between the fork arms Ia ₁ Ib approximately parallel to the ends 1 c thereof, the terminal head clamp with the rod 3 of is here so firmly pressed onto the lead L below that of the hollow piston is pushed back into the shaft portion 2 6 and the Ends 1 c above the conductor L lie. In this position, the rod 3 is rotated a quarter turn to the right or to the left, ie in the sense that the ends c overlap the conductor L , as shown in FIG. Then the rod 3 is pulled down so that the counter-clamping jaw 7 presses the conductor L against the ends 1 c under the action of the clamping spring 8. The rod 3 can now be released from the connection head clamp and used elsewhere. Due to the attack of the ends 1 c of both fork arms and the intermediate resilient counter-clamping jaw 7, the connection head clamp receives a secure fit on the conductor L.

The variant shown in FIG. 4 differs from the embodiment according to FIG. 1 only in that that on the steerer tube part 2 two copper strands 5 for grounding, short-circuiting or power take-off are provided.

The second embodiment according to FIGS. 5 to 7 is intended for flat profile conductors. Accordingly, the ends are 1 c instead of circular arc-shaped curved formed straight, and the counter clamping jaw 7 has a flat or fluted surface on pressure. In this embodiment, the stroke limitation of the parts 6, 7 is also achieved by a bolt 12 'which is fixed in the counter-clamping jaw 7 and, penetrating a central bore of the abutment 9, carries a stop nut 13' at its free end, which is on a threaded attachment of the bolt 12 'is adjustable. The means for changing the bias of the clamping spring 8 are corresponding to those shown in FIGS. In addition, in this embodiment the fishing fork or clamping jaw 1 is provided with a clamp 1 d, which allows the clamp to be clamped onto the shaft part 2. Handling and function here are the same as for the first embodiment.

While in the embodiment of Fig. 5 to 7 the ends of the fork arms 1 c the lead L in a 90 ° angle different overlapping, extending, in the variant of FIG. 8, the same at right angles to the clamped conductor L.

Claims (3)

PATENT CLAIMS: 1. Current take-off, grounding or short-circuit rod for electrical overhead lines, in which the connection head terminal consists of a clamping jaw designed as a fishing fork and a spring-loaded counter-clamping jaw, which extends over the conductor wire, characterized in that the clamping jaw (1) designed as a fishing fork consists of a on the rod (3) attachable sleeve-shaped shaft part (2) with on opposite sides attached fork arms (la, Ib), the ends (Ic) extend in opposite directions, and that between the fork arms (1 a, 1 b) in Shaft part (2), the electrically insulated counter-clamping jaw (7) is mounted, which is under the pressure of a spring likewise accommodated in the shaft part (2). 2. Rod according to claim 1, characterized in that the counter-clamping jaw (7) in the shaft part (2) is rotatably mounted and on the shaft part (2) provisions and adjustment means (10, 11) are provided, through which the pressure of the clamping spring (8) can be adjusted. 3. Rod according to claims 1 and 2, characterized in that the shaft part (2) in itself known way can be releasably placed on the rod (3) by a bayonet lock (4). Considered publications:
German utility model No. 1690556, 1745260; U.S. Patents Nos. 2,462,247, 2,283,061,
582 621, 1672 477. 1 sheet of drawings © 009 609/297 9.60