Catalogue Number: 3602
Maddox Cylinder Axis-Finder
Sub-Category: Lens measure, lens clock
Designer/inventor: Ernest Edmund Maddox
Year Of Publication/Manufacture: 1920s
Time Period: 1900 to 1939
Place Of Publication/Manufacture: London, UK
Description Of Item: Boxwood Axis-Finder with brass swinging arm. Printed in black ink: 'MADDOX CYLINDER AXIS-FINDER' and axis scale from 0 to 180. Upper margin printed with linear scale of centimetres 1-9. Blank on reverse. Upper edge is grooved to hold the spectacles or lens which are to be assessed. The spectacles are held in the grooved section and then the device is tilted to the right or left until the deviation of a distant vertical line, viewed through the lens, disappears. The brass pointer then indicates the axis of the cylinder of the lens.
Historical Significance: Reference: Catalogue of ophthalmic instruments and appliances, John Weiss & Son, Ltd., London, 1914, page 206, Cat No 343.
How Acquired: Donated by C W Kett
Date Acquired: Prior to 1980
Condition: Good except tip missing from brass pointer
Location: Archive office. East wall shelves unit 3. Drawer 9