Pantographic Datum Rule

Catalogue Number: 3618
Pantographic Datum Rule
Category: Equipment
Sub-Category: Dispensing tool
Corporation: Willesden Optical Works Ltd
Year Of Publication/Manufacture: c 1950
Time Period: 1940 to 1999
Place Of Publication/Manufacture: London, England
Publisher/Manufacturer: Willesden Optical Works Ltd.
Description Of Item: Aluminium rectangular pantograph 150 mm x 70 mm mounted on white plastic base 155 mm x 75 mm with triangular extension 25 mm long with centimetre and inch scales on edges and graduations marked bridge height, eye size and PD, joint height, segment below datum and a central datum line. The words WILLESDEN OPTICAL WORKS LTD., DATUM RULE and COPYRIGHT appear in the lower section of the base. The triangular section has millimetre graduations titled Inset and base. R Kaye is engraved on the base and lower pantograph arm.
How Acquired: Donated by Robert Kaye
Date Acquired: 4/3/2014
Condition: Good
Location: Archive office. East wall shelves unit 3. Drawer 10

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