Leitz adjustable transformer for low-voltage Ultropak microscope lamp
Date: 1950
Inventory Number: 2009-1-0071
Classification: Transformer
Subject:
Maker: Ernst Leitz (company) (1849 - 1986)
User: William Alexander Jackson (1905 - 1964)
User: Houghton Library, Harvard University (founded 1942)
Cultural Region:
Place of Origin:
Dimensions:
without cord: 14 × 10.5 × 27.5 cm (5 1/2 × 4 1/8 × 10 13/16 in.)
Description:
Adjustable transformer for Leitz Ultropak indirect illumination for the study of opaque objects with a microscope. It is for a low-voltage lamp (8 volts, 0.6 amps)
It is shaped like a upturned basket with cooling apertures. The front end has a rotating knob with an index. An arrow on a scale is marked "schwach." In front of the dial is a ammeter marked "A" with a scale divided from 0 to 1 at 0.1 intervals. A two-prong socket is mounted underneath it. The rear has an AC power cord.
It is shaped like a upturned basket with cooling apertures. The front end has a rotating knob with an index. An arrow on a scale is marked "schwach." In front of the dial is a ammeter marked "A" with a scale divided from 0 to 1 at 0.1 intervals. A two-prong socket is mounted underneath it. The rear has an AC power cord.
Signedon metal plaque: Leitz Speciallampe / 8 Volt 0,6 Amp. / Ernst Leitz Wetzlar
Historical AttributesUsed by William A. Jackson (died 1964), first librarian of Houghton Library.
When Houghton Library opened in 1942, Jackson invested in a lot of state-of-the-art equipment for examining books and investigating them. The apparatus included microscopes, black lights, and special lamps.
This particular instrument was made as early as 1935, but not purchased until 1950. The earlier date is found in Leitz catalogues related to the Ultropak system. The later date is found on a packing list. These accompanied the microscope kit and are in the CHSI instrument file.
When Houghton Library opened in 1942, Jackson invested in a lot of state-of-the-art equipment for examining books and investigating them. The apparatus included microscopes, black lights, and special lamps.
This particular instrument was made as early as 1935, but not purchased until 1950. The earlier date is found in Leitz catalogues related to the Ultropak system. The later date is found on a packing list. These accompanied the microscope kit and are in the CHSI instrument file.
ProvenanceWilliam A. Jackson, Librarian, Houghton Library, Harvard University, c. 1942 ; transfer to CHSI courtesy of Dennis Marnon, 2009.