FIELD: machine building.
SUBSTANCE: group of inventions relates to machine building. Clock drum (21) includes housing (23) to receive rotary shaft (25) and at least one spring (27). Helical spring is arranged between the housing inner wall and outer wall of the rotary shaft. Device (22) to increase the torque of at least one spring contains additional bends (24) for energy accumulation. Bends are made integral with the said at least one spring and in addition to the spiral shape of the spring. Bends are rectangular in the cross section and form periodic changes in relation to the spiral trajectory. Clock mechanism has a clock drum.
EFFECT: provided is increased energy capacity of the spring.
8 cl, 4 dwg
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