cathode ray oscillograph
Date: c. 1936
Inventory Number: RS0419
Classification: Oscillograph
Subject:
Maker: National Company, Inc. (1914 - 1970s)
User: Cruft Laboratory, Harvard University (founded 1914)
Cultural Region:
Place of Origin:
Dimensions:
21 x 18 x 47 cm (8 1/4 x 7 1/16 x 18 1/2 in.)
Description:
Rectangular black metal case with ventilation gaps. Front panel consisting of a white, circular cathode ray tube screen, two discoidal dials, and a switch. On one side are two more dials, and four electrical connectors. Grey cord with 2 pronged plug.
Signedplate on top panel: NATIONAL / TYPE CRO NUMBER A / (NC logo) / CYCLES 50-60 VOLTS 105-120 / NATIONAL COMPANY INC. / MALDEN, MASS., U.S.A.
FunctionThe electron oscillograph, a name for early oscilloscopes, is an electronic device that is used to graphically observe an electric signal.
Oscilloscopes and oscillographs are most often used to detect the exact wave pattern of a periodic electric signal.
For more information on oscillographs, see the wikipedia page here.
Oscilloscopes and oscillographs are most often used to detect the exact wave pattern of a periodic electric signal.
For more information on oscillographs, see the wikipedia page here.
Historical AttributesCruft
ProvenanceAccording to a tag, it was used at the Cruft Laboratory, Harvard University.