Safety device for freeing a machine operator.

摘要

A machine tool comprises a motor (14) connected to a main power source. The device according to the invention, adapted to this machine, comprises an auxiliary power source (22), a means for interrupting the power supply of the motor (14) of the machine by the main power source (6) and for simultaneously connecting this motor to the auxiliary power source (22), a means for controlling the motor at low speed, and a means for controlling the motor in a desired direction. The auxiliary electrical power source (22) is used as an electrical source to supply the said coil (60) of a relay with electric current, a switch (62) being provided in order to close the electric-supply circuit of the coil (60) of the relay. <IMAGE>