THREAD MILLING ATTACHMENT - CONE BLANCHARD …
FIG. 3 is a top plan view of the lock mechanism for locking the thread milling attachment in position adjacent the work, taken on the plane of the line 3--3 of FIG. 2; and FIG. 4 is a rear elevation view of the stop spindle mechanism for the thread milling attachment, as seen from the plane of the line 4--4 of FIG. 1.