DE1080660B - Scissor separator - Google Patents

Description

kl. 21c 28/03

INTERNAT. KL. H 02 C

PATENT OFFICE

L 31455 VIIIb / 21 c

REGISTRATION DATE: OCTOBER 10, 1958

NOTICE
THE REGISTRATION
AND ISSUE DEK
EDITORIAL: APRIL 28, 1960

The invention relates to scissor disconnectors, the mating contacts of which on an overhead line or on a double ladder are attached, on those scissor separators whose over the upper hinge point extended scissor arms are also designed as pressure contacts. The well-known scissor disconnector are often designed so that the gripper contacts are extended around the Lay overhead line or around a roller attached to it. Now, such a gripper contact has the disadvantage that when the line is shortened as a result of low temperatures, there is no change in the position of the contact roller can occur to the gripper jaws because it is essential for a good current transfer required contact pressure prevents this. In this particular case, both the Carriers of the overhead line as well as on the disconnector support a very high mechanical stress exercised. If this disadvantage is to be avoided, it must be ensured that the contact roller can yield in terms of the tensile stress on the overhead line cable. The invention goes to Avoidance of the aforementioned disadvantage of the known scissor disconnectors with pressure contacts the end; these are switches in which the arranged at the upper end of the scissor arms or from Spread the contacts carried at the upper hinge point after or with the entry into the mating contact and are pressed against a contact frame optionally arranged in the interior of the mating contact; for this purpose, the movable contacts are hinged to the upper scissor arms and are spread by rotatably mounted angle levers depending on the position of the scissors and against the Mating contact pressed; by a high contact pressure exerted against the angle lever or by Roughening the moving contacts ensures good contact. However, that goes with it Loss of possibility, even with the above-mentioned, temperature-related changes in elevation of the Mating contact to establish or guarantee contact under the required contact pressure; on the other hand, the use of angle levers and control members causes difficulties in mechanical and electrical terms.

These disadvantages are avoided by the invention, namely that in a scissor disconnector, its scissor arms extended beyond the upper hinge point as contact pressure contacts are designed for mating contacts attached to an overhead line, the ends of the upper scissor arms are bent in such a way that they spread apart in a manner known per se in the extended state of the scissors and stand firmly against it as a scissor separator

Applicant:

LICENTIA Patent -Verwaltungs -G.m.b.H., Frankfurt / M., Theodor-Stern-Kai 1

Dipl.-Ing. Wolfgang Schick

and Dipl.-Ing. Franz Petermichl, Kassel,

have been named as inventors

rotatable rollers place mating contacts. The roller can be on the contact pressure and roll off without a significant change in the contact pressure. Even with that known switches with gripper contacts, this process would not be possible if the two gripper contacts or jaws placed on a rotatable roller. There would then be torques in different directions are exerted on the roller, whereby this maintains its position. By the invention Execution, however, the overhead line to a certain extent yield to the changes in length, so that Inadmissibly high loads on the suspension insulators or their supporting masts are eliminated.

It also proves to be advantageous in the scissors separator according to the invention that the pressing movement of the movable contacts and the contacts themselves by bending the over the upper scissor hinge point reaching out scissor arms achieved opposite to the closing movement of the lower scissor arms is or are formed, d. that is, the parts of the Scissor arms do not cross each other as usual, but these parts are bent so that each one to the part of the mating contact lying on the same side as the lower scissor arm and thus at the same time acts as a movable contact part or contact arm; special angle levers or control links are thus not required in the scissors disconnector according to the invention, rather form the Contact parts or contact arms with the scissor arms rigid, coherent pieces.

In the scissor cutter according to the invention, the rollers are also expediently rotatable about the overhead cable arranged, which results in a very simple construction. In this case the Scissors in the folded state in the direction

009 507/318

shows two suspension options for the

the outgoing line. In order not to push the overhead cables apart, the rollers must be fixed by spacers. It is also possible to use the spacers when the scissors are offset by 90 ° train themselves as contact rollers.

In the drawing, a scissors cutter according to the invention is shown schematically. It shows

1 shows the switch in the extended state, the dashed lines indicating the path and position of the scissor arms when switched off;

Fig. 2 is a partial section of the one pressure contact on an enlarged scale;

Fig. 3
Contact rollers.

In Fig. 1 of the support 1, the drive mechanism 2 carried by a prime mover, not shown, via a likewise not Isolation shaft shown is actuated. From this drive mechanism 2, the double scissors with their Actuating arms 3 and the lower scissor arms 4 moved up and down. The lower scissor arms 4 are extended beyond the upper hinge point 5 and bent so that they are in the extended state as Pressure jaws 6 lie against the contact rollers 7. The contact rollers 7 can around the overhead line be arranged directly rotatable. The branch line is labeled 8.

Fig. 2 now shows how the contact roller 7 on the pressure jaw 6 when the length of the overhead cable changes can roll off. The lower position of the roller 7 shows the maximum rope sag if the rope is exposed to high temperatures or ice, the middle position is normal, and the upper position Position the minimum rope sag at low temperatures. The contact pressure changes with that Unrolling of the roller is not essential.

3 shows a plan view of the mating contacts attached to the overhead line cables 9. In Fig. 3a, the contact rollers 7 are arranged rotatably directly around the overhead cables and by spacers 10 mechanically connected to one another so that the rotation of the rollers is not hindered, but on the other hand, it is not possible to press the overhead line apart. Can't the contact rollers are subsequently arranged on the overhead line cable, the attachment of a frame with the Rolling required on the overhead line. The rollers run expediently on ring contacts, which are of the Overhead line or the frame parts attached to it be worn. In Fig. 3b, the spacers are designed as contact rollers. In this case it is a rotation of the scissors by 90 ° compared to the embodiment of FIG. 3 a is necessary. The scissors then lies in the folded state perpendicular to the branch line.

Claims (4)

Patent claims: 1. Scissor separator, the scissor arms of which are extended beyond the upper hinge point as pressure contacts are designed for mating contacts attached to an overhead line, characterized in that, that the ends (6) of the upper scissor arms are bent so that they are in the extended State of the scissors are spread apart in a known manner and thereby place firmly against mating contacts designed as rotatable rollers (7). ■ 2. scissors separator according to claim 1, characterized in that that the rollers (7) are rotatably arranged around the overhead cable. 3. scissors cutter according to claim 1, characterized in that that the rollers (7) are rotatably suspended from the linkage of one of the overhead lines Frame (10) are attached. 4. scissors separator according to claim 2 or 3, characterized characterized in that the rollers (7) run on ring contacts. Considered publications:
German Patent Nos. 955 616, 964 961;
Patent No. 10 202 of the Office for Inventions and Patents in the Soviet zone of occupation in Germany. 1 sheet of drawings © 009 507/318 Φ.60