One of the designers of the T-34 - Koshkin said that the most reliable detail - TA, which is not. Here and in the proposed semi-automatic machine for "eternal" lamp number of parts is reduced to a minimum.
Not a problem is to first click a single switch (SA1), and then another (SA2) (Fig. 1 and 2). Time spent translating the hands from one switch to another, it is enough to preheat the lamp. With increasing electricity rates can, perhaps, with this "machine" and save if you turn on the light when you need it, not at full capacity. A flicker of light in this mode can be eliminated by closing its "corrugated" shade.
Author: A. Martin; Publication: www.cxem.net