DEVICE FOR PREVENTING ACCESS TO AN OPERATING PART

摘要

A device for preventing access to an operating part which is fixed to a rotary member of a smaller cross section than the operating part. The device includes an elongated tube having a hollow interior large enough to accommodate the operating part and formed with a slot extending longitudinally along the tube from an open end thereof with this slot having a width great enough to receive a rotary member but too small to permit the operating part to pass through the slot. Thus the tube can be advanced at its slot along the rotary member with the operating part received in the interior of the tube. After the operating part is thus situated within the tube, a plug is inserted into the tube and a releasable lock coacts with the plug and the tube for preventing the plug from being removed so that access to the operating part is prevented as long as the plug remains in the tube.