Eden's screw diameter measuring machine, 1916

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

This machine was made by Taylor, Taylor and Hobson Ltd. to a design produced by Mr. E. M. Eden in 1915 to allow rapid and accurate measurement of the screw gauges required during the First World War (1914-18). Two carriages running on balls in V grooves allow free axial movement for the measuring head, whilst it is always held at right angle to the work. Two wires of a size to suit the thread to be measured are suspended from the arms provided and the micrometer head is used to measure across these to determine the effective diameter.

Details

Category:
Industrial Metrology
Object Number:
1919-487
Materials:
steel
Measurements:
18 x 22 x 40 cm
type:
micrometer for screw threads
credit:
Ministry of Munitions