Trial frame for taking facial measurements
 Catalogue Number: 4493 Trial frame for taking facial measurements Category: Equipment Sub-Category: PD ruler, pupillometer Designer/inventor: J Harwood Year Of Publication/Manufacture: 1923 Time Period: 1900 to 1939 Place Of Publication/Manufacture: United Kingdom Description Of Item: Instrument to make facial measurements for fitting spectacles, made of metal, glass and white celluloid plastic. Calibrated to measure monocular PD's, frame tilt and bifocal height, and marked 'PAT. No 208028'. The British Patent GB208028A, lodged January 4, 1923, is titled 'An improved instrument for taking the facial measurements required for fitting the frames of spectacles and eyeglasses.' Size: W: 1893mm x H: 85mm x D: 57mm. Historical Significance: Believed to have been in the Kett collection before 1988, but not recorded. How Acquired: Not known Date Acquired: Prior to 1989 Condition: Good, but missing parts for bridge fitting measurement. Location: Archive Office. Spectacles cabinet Drawer 5 |