Power transmission, particularly for an adjusting device

A power transmission for driving at least one driven unit (8, 9) over a driven path comprising:

• at least one clutch (20) including a drive input (16), a drive output (14) and a drive connection for operably transmitting a given driving momentum from said drive input (16) to said drive output (14) when said clutch (20) is in a transmitting state;
• and
• control means (30) for switching said clutch (20) between said transmitting state and a released state in which such transmission of said given driving momentum is interrupted, said clutch (20) having transmission characteristics including a driving path of said drive output (14) and a driving time while said clutch (20) is in said transmitting state, wherein said control means (30) include a loading device (31) for operably positively setting said drive output (14) under a control load substantially counteracting said driving momentum, said control means (30) positively and variably controlling said loading device (31) as a function of at least one of said transmission characteristics to thereby provide varying first and second loading states, said loading device (31) positively triggering said clutch (20) to be in said transmitting state when said loading device (31) is in said first loading state and to be in said released state when said loading device (31) is in said second loading state.