cathode ray oscillograph
Datec. 1936
Inventory NumberRS0419
ClassificationOscillograph
Subject
Maker
National Company, Inc.
1914 - 1970s
User
Cruft Laboratory, Harvard University
founded 1914
Cultural Region
Place of Origin
Dimensions21 x 18 x 47 cm (8 1/4 x 7 1/16 x 18 1/2 in.)
Material
DescriptionRectangular 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.
ProvenanceAccording to a tag, it was used at the Cruft Laboratory, Harvard University.
Historical AttributesCruft
General Radio Company
Date: c. 1935
Object number: RS0088
Allen B. Du Mont Laboratories, Inc
Date: 1945-1946
Object number: RS1073
Allen B. Du Mont Laboratories, Inc
Date: 1950-1960
Accessories: laboratory notes (in CHSI library)
Object number: 1997-1-0489
General Radio Company
Date: c. 1931
Object number: RS0357
General Radio Company
Date: c. 1931
Object number: RS0417
Apple Computer Inc.
Date: 1987-1990
Accessories: AppleDesign keyboard; Logitech mouse (not original); connection cables (b)
Object number: 2009-1-0018a
General Radio Company
Date: circa 1931
Object number: RS0262
General Radio Company
Date: circa 1930
Accessories: cords (2)
Object number: RS0348
Apple Computer Inc.
Date: circa 1985
Accessories: keyboard (2003-1-0112b)
Object number: 2003-1-0112a
General Radio Company
Date: circa 1931
Accessories: 2 small felt lined arcs with 2 protruding arms.
Object number: RS0261
Cruft Laboratory, Harvard University
Date: 1930-1960
Object number: 1998-1-0958