using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron

Full Title

Generating pulses having essentially a finite slope or stepped portions > having triangular shape > having sawtooth shape > using as active elements vacuum tubes only > in which a sawtooth voltage is produced across a capacitor > using a single tube exhibiting negative resistance between two of its electrodes, e.g. transitron, dynatron