R1a. Freely oscillating mass at horizontal impact
R1b. Freely oscillating mass at vertical impact
R2a. Downwards pivoting mass with counteracting driving torque at horizontal impact
R2b. Downwards pivoting mass with counteracting driving torque at vertical impact
R3a. Downwards pivoting mass with driving torque at horizontal impact
R3b. Downwards pivoting mass with driving torque at vertical impact
R4a. Upwards pivoting mass with driving torque at horizontal impact
R4b. Upwards pivoting mass with driving torque at vertical impact
R5. Horizontally pivoting mass without driving torque
R6. Horizontally pivoting mass with form fit driving torque
R7. Horizontally pivoting mass with frictional driving torque