JONES and LAMSON Automatic Thread Grinding Machine 6" x 36" and 12" x 34" Models. Detailed Operator's Instruction Manual (plus brief maintenance notes) with many useful Sectional Drawings.   
 

Eagle Surface Grinders: Unfortunately no manual appears to have been issued for these machines but there is an interesting collection of Sales and Specification Catalogue available for the early and late Standard and Heavy Duty Models 1, 2, 2A, 3, 3A, 4, 4A, 5, 6; the Model 534 in Mk.1 and Mk.2 versions together with a price list.

NORTON 6" Type C Cylindrical Grinder - covers all hand, hydraulic and semi-automatic models. Detailed Operation & Maintenance manual with a number of useful sectional drawings and a hydraulic schematic.