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Experimental measuring machine designed by E.M. Eden

1918
N.P.L. Horizontal projection machine, without stand or screen; dated 1916

N.P.L. Horizontal projection machine

1916
Screw pitch measuring machine designed by E. M. Eden designed c. 1915, at the NPL, Teddington, made c. 1919, with a wooden accessory box.

Screw Pitch Measuring Machine

1915-1919
Eden's Screw diameter measuring machine; floating head type, 2" capacity with a pair of 14 t.p.i. needles.

Eden's screw diameter measuring machine, 1916

1916