METHOD OF AUTOMATIC OPERATION OF A PERCUSSION APPARATUS

摘要

The invention provides a method of automatic operation of a percussion apparatus of the type consisting in letting fall or driving a percussion element onto an object to be struck such as a pile, a nail, a tube or the like, in relifting the said percussion element by means of a cable passing round a pulley and connected to a drum driven in rotation by driving means at least in one direction of rotation, characterized in that the said percussion element is connected by a mechanical means to the said drive drum to form a closed circuit in such a manner as to cause the stoppage of the drum to substantially coincide with the moment the strike of the said percussion on the said object ends.