Lens measure

Catalogue Number: 2904
Lens measure
Category: Equipment
Sub-Category: Lens measure, lens clock
Year Of Publication/Manufacture: 1915
Time Period: 1900 to 1939
Place Of Publication/Manufacture: Britain
Description Of Item: Glass-faced lens measure for measuring the curvature of the front and back surfaces of ophthalmic lenses, 44 mm dia. 9 mm deep. Made of chromed brass and glass with white clock face under the curved protective glass cover with black dioptre scale from ? 10 D, with black rotating pointer. Three pins under protective metal cover Marked ' BRITISH MADE / ENG PAT. 287642.11 / USA APRIL 20 15 / BREVETTE / DRP'
Historical Significance: BREVETTE / DRP means 'Patented Deutsches Reichspatent'.
How Acquired: Donated by Estate of William Cooper, via Peter Lewis
Date Acquired: Apr 2016
Condition: Good except glass cover has degraded
Location: Archive office. East wall shelves unit 3. Drawer 1

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