logologo-optometry

The 'Syze' Rule Dispensing Tool & Instruction Sheet

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Catalogue Number: 4307
The 'Syze' Rule Dispensing Tool & Instruction Sheet
Category: Equipment
Sub-Category: Dispensing tool
Year Of Publication/Manufacture: C 1938
Time Period: 1900 to 1939
Description Of Item: Solid boxwood rule with sliding scale.182x41x8mm overall, scale is 157x13x3mm. Brass mounts for finger-pieces, one mounted to the base and the second to the sliding scale. Two brass screws holding the mounts in each. 6 brass screws holding two boxwood planks together from the back. Sample finger-piece bridge included. Printed instructions with instrument photograph included. 'SYZE RULE / FIT U/FITTING/ORDINARY/P.Ds. / FITS U/FITTINGS/NARROW/P.Ds.' included on one side of front face, as well as mm scales. 'SIZE OF EYE / SHAPE OF LENS / ORDINARY OVAL / SHORT OVAL/AND PANTOSCOPIC / ACTUAL LENGTH/OF LENS IN M/M' included on other side of front face, as well as mm scales. '50' is stamped on both the back face of the sliding scale, and front face of base sliding scale channel.
Historical Significance: Used for measuring Rimless Pince-Nez bridges & assessing lens sizes. Can also be used to determine pupillary distance or finger-piece mount size.
How Acquired: Donated by Alan Johnston
Date Acquired: 28/11/2022
Condition: Excellent
Location: Documents Room Green Daytona Cabinet Drawer 5

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