"Lambert Telesect Electric Pendulum"
This time distribution, as its name suggests, uses a 220 Volt mains supply. No battery or accumulator. Specialists in monumental watchmaking sometimes used this system because with the 220 Volt current they had a powerful source of energy for controlling the electric motors of the large facade hands. Of course, the power outage still had to be dealt with. Several manufacturers solved this problem in various variants, notably Lambert Huchez (screw memory), or Bürk in Germany, which ensured the memorization of the mains failure according to a chain and counterweight principle with end of travel contact for reset. automatic time of receivers. 
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