Catalogue Number: 3240 Bausch & Lomb diagnostic set Category: Equipment Sub-Category: Ophthalmoscope retinoscope set Designer/inventor: William L Patterson Year Of Publication/Manufacture: c1930 Time Period: 1900 to 1939 Place Of Publication/Manufacture: Rochester, NY, USA Publisher/Manufacturer: Bausch & Lomb Optical Co Description Of Item: Diagnostic set comprising metal battery handle, May ophthalmoscope, spot retinoscope, optical instrument as a hand slit lamp, spare bulb and printed instruction card in fitted case. Ophthalmoscope with single wheel of lenses impressed 'BAUSCH & LOMB OPT. Co/ ROCHESTER, N.Y., U.S.A./ MAY OPHTHALMOSCOPE/ PATENTED.' Spot retinoscope head marked 'BAUSCH & LOMB OPTICAL Co. ROCHESTER, N.Y.,U.S.A.' The third optical instrument is marked 'PATENT 1631329' and has a large eyepiece with a magnifying lens mounted at an angle to the illumination beam. It has a wheel of five different apertures, three round and two slits. This forms a monocular hand-held slit-lamp. The fitted, hinged case is covered in black leatherette and lined with purple velvet. Case: 185 x 103 x 62 mm. Historical Significance: US Patent 1631329, filed 29 April 1925, was granted on 7 June 1927 to William L Patterson and assigned to Bausch & Lomb Optical Co, Rochester, NY for an 'Optical Instrument' designed to give a magnified view of the external eye. How Acquired: Donated by Estate of William Cooper via Peter Lewis Date Acquired: Mar 2016 Condition: Case & instruments: good except black enamel bady worn on battery case Location: Archive Office. Cabinet One Drawer 15 |