glass fibre

A long glass fibre is supported by lateral pivots on jewel bearings.

The second lever serves as an index, and can therefore be made of fine glass fibre.

A very light glass fibre was used for the construction of the lever, which was supported on jewel bearings.

But gradually the rarefied gas inside becomes warmed and more conducting and the discharge spreads into the glass fibre.

Once, however, the glass fibre is heated, the discharge breaks through its entire length instantly.