Trial frame

Catalogue Number: 2895
Trial frame
Category: Equipment
Sub-Category: Trial Frame
Year Of Publication/Manufacture: 1895
Time Period: 19th C
Description Of Item: Complex trial frame in silver metal, 140 x 50 mm, double lens clip in front of both eyes rotated by screw controls, single lens clip at back. Axis scales for each eye covering 185 degrees. Nose rest adjustable for both height and vertex distance by screw mechanisms, with a height scale. Adjustable eye separation with inch scale for interpupillary distance. Slide extending sides with curl ends. Back of right rim is stamped PAT NOV 6 94; back of left eye rim is stamped PAT JUNE 25 95
Historical Significance: This trial frame from the late 19th century is noteworthy for using inch scale for PD instead of the usual mm. It is the same trial frame as that at Cat. No. 911, which is stamped on the eye rims ; 'PAT NOV.6.94 & PAT JUNE 25. 95' as is the case with this example. However the Cat No. 911 example also has its sides stamped 'PAT. APR. 30.95.'
How Acquired: Donated by Estate of William Cooper, via Peter Lewis
Date Acquired: April 2016
Condition: Very good
Location: Archive Office. Spectacles cabinet Drawer 5

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