Mill for laboratory use - has grooves in locking screw and sliding outer sleeve for locking ball in window in guide tube which is between them

摘要

To lock the locking screw (15) in position in the spider (13), the latter has a guide tube (14) enclosing the screw. On the outside of the guide tube, a sleeve (19) slides between locking and free positions. The walls towards the tube of the sleeve and screw contain grooves (18,25), into which a locking ball (21) in a window (20) in the tube fits. In the locking position of the sleeve, the groove in its inside wall can be clear of the window, while in the free position the two are in line. ADVANTAGE - Safely secures the vessel in place without the need for a locknut etc.