DE360500C - Hewlet-type guy insulator - Google Patents

Description

The invention relates to a tensioning insulator of the Hewlet type, that is to say a disk-shaped one Insulator with side edges that extend to either side of the disc. The previous embodiment of such isolators is shown in Fig. Ι. This shows that the thickened disc in the middle part of two intersecting has bent channels, which in the previous embodiments with the same Radius are executed and result in a central bead that extends evenly to extends both sides of the disc. Although this version allows you to Piercing of the two canals uses the same piercer. But it brings the serious one The disadvantage is that the insulator is extremely heavy in weight, with the greatest accumulation of porcelain masses in the central, heavily thickened parts, fails and is therefore extraordinary when fired large committee. It is known that porcelain shards fluctuate too strongly Mass accumulations during firing can easily warp and crack and are therefore very expensive to manufacture. Also arise here flaws in the porcelain, which are often not visible from the outside, blistering etc., which lead to the rapid destruction of the insulator, especially under high voltage.

In recognition of these shortcomings, the invention creates a new guy insulator Hewlettype with unload to both sides-

S60500

the edges of the disc with the following | essential characteristics:

The middle part of the disk for receiving the canals crossing one another is not; laid more symmetrically to the plane of symmetry of the unthickened disc that can be laid through the center line AB in Fig. 1, but rather on one side, asymmetrically from this. Washer pulled out. This gives ίο an insulator according to Fig. 2, in which this middle thickened part -m on one side from the | unthickened disk s is pushed out. It is now possible to produce the two intersecting canals with the same engraver, and one can easily use the engraver in the middle | Partly penetrate without damaging the lateral edges r and in particular thereby j cut out one channel k without further ado. Due to the asymmetrical mounting of the middle part, however, this mentioned channel will be extremely short; the wall between it and the second channel α will have that thickness which is necessary with regard to the insulation of the voltage applied to this insulator, while the other wall α ¹ in the pane itself can be as thin as it is for production is necessary because it only has to prevent the rope from being wetted at this point and is also intended to determine the creepage distance of the spark. However, there is no direct high voltage on this thin insulator wall. Due to the shortness of the Ka \ k Nals one hand, and the small thickness of; Wall w in the pane itself on the other hand j it is thus achieved that for the first time a tensioning insulator is created with edges protruding on both sides, the 4-0 central, thickened part of which contains the smallest possible porcelain mass and therefore without the risk of warping and Jumping can be easily burned. Blistering is also almost completely due to the wall thickness being reduced to the smallest degree! come excluded. ;

Burning tests have shown that it actually reaches' ■ this way a guy insulator with very little _training; case can be produced during firing, and which is electrically completely equivalent to the previously known insulator, while it has a lower weight than this. 1

In particular, the advantage can still be; PS will suffice that the one surface of the j disk f is made flat and thus J the production is further simplified. '

The mouths of the channel k can be widened as desired and thus further savings in raw material can be made, furthermore a safe water drainage can thereby be guaranteed, so that the insulator cannot burst due to frozen water, even if it is sloping at an angle. In particular, the inner boundary walls e of the channel k can also be designed to be circular, so that the rope can lie against this surface in a completely uniform manner and this is stressed in the most favorable way.

Claims (5)

Patent Claims: ι. Hewlett-type guy insulator with protruding edges on both sides on the isolator disk, characterized in that the middle one, intended for receiving the crossing cables or the like, thickened part of the pane is laid out of the pane on one side. 2. Anchoring insulator according to claim 1, characterized in that the two intersecting channels in the central thickened disk part have the same radius of curvature and the inner channel (k) is considerably shorter than the outer channel. 3. Anchoring insulator according to claim 1 or 2, characterized in that the wall thickness between the intersecting channels is selected according to the voltage to be isolated, while the thickness of the outer boundary wall (w) of the inner channel (k) lying in the insulator washer is smaller, expediently corresponds to the minimum required with regard to good shaping and good firing. 4. Anchoring insulator according to claim 1 or following, characterized in that the inner shorter channel (k) is formed only on a short piece with the same diameter and radius of curvature as the other outer channel and is expanded on both sides to save raw materials and enable a 'safe water drainage 5. Anchoring insulator according to claim 1 or the following, characterized in that the central thickened part of the disc is offset so far on one side and, if necessary, the wall thickness (w) of the inner n ° Ren channel (k) is chosen so small that a flat or almost flat boundary surface (/) of the isolator disk is created. 1 sheet of drawings.