Welch Allyn retinoscope Model 18000
 Catalogue Number: 3867 Welch Allyn retinoscope Model 18000 Category: Equipment Sub-Category: Retinoscope Corporation: Welch Allyn Year Of Publication/Manufacture: c1980 Time Period: 1940 to 1999 Place Of Publication/Manufacture: USA Publisher/Manufacturer: Welch Allyn Description Of Item: Welch Allyn spot retinoscope Model 18000. Chromed metal battery handle, black plastic head marked 'WELCH ALLYN U.S.A.' Mount labelled 'MODEL 18000/ PATS. PEND./U.S.A./HALOGEN'. Size; 240mm L x 42mm W x 30mm D. Historical Significance: In 1959 Welch Allyn were the first company to use rechargeable batteries within diagnostic instruments. In 1973 the company became the first company to develop and use subminiature halogen lamps for medical diagnostic equipment. Halogen improved the intensity of the light and gave a better colour temperature for diagnosis. How Acquired: Donated by Margaret Banks Date Acquired: October 2019 Condition: Good Location: Archive Office. Cabinet One Drawer 7 |