12:17. Rotary clamp, adjusting spring
Rotary clamp, installation| And = a lock clamp in a closed position  In = the clamp of the lock is removed the groove 1 on a clamp of the lock has to settle down on one line  | 
  
Adjusting spring, installation
|  During an inhaling the ends of a spring 1 have to settle down on the right and to the left of a control lever 2.  The preliminary inhaling always pushes away a control lever and the cylinder of the lock in the central position.  | 
  
Rotary clamp, installation (Coupet's model)
|  And = a lock clamp in a closed position  In = the clamp of the lock is removed the groove 1 on a clamp of the lock has to settle down on one line  | 
  
Adjusting spring, installation (Coupet's model)
|  During an inhaling the ends of a spring 1 have to settle down on the right and to the left of a control lever 2.  The preliminary inhaling always pushes away a control lever and the cylinder of the lock in the central position.  |