sealed tubes (4)
Date1880-1920
Inventory Number1998-1-1469
ClassificationVacuum Tube
Subject
Maker
American
?
Cultural Region
Dimensionsin shoebox: 10 x 33 x 16 cm (3 15/16 x 13 x 6 5/16 in.)
Material
Accessoriesshoebox
DescriptionThese are four sealed glass tubes, all stored together in a shoebox. From top to bottom, these tubes are arranged in size from biggest to smallest:
1. The first tube is the largest in both length and diameter, with a round, darkish, stained ball at the base, a long, clear, glass shaft, and a bulbous tip with a small point at the end.
2. The second tube has a clear glass shaft that is approximately the same diameter as the first, but only half as long, with a narrower, thinner tip at the end, which also culminates in a point at the end.
3. The third tube has a narrow, cylindrical, clear glass shaft with a rounded closed end. The other end is broken.
4. The final tube is the smallest in length, although the diameter is slightly larger than the third tube. It seems to be slightly bent in the middle, with dark, smoky, pointy tips at each end (small electrodes?)
1. The first tube is the largest in both length and diameter, with a round, darkish, stained ball at the base, a long, clear, glass shaft, and a bulbous tip with a small point at the end.
2. The second tube has a clear glass shaft that is approximately the same diameter as the first, but only half as long, with a narrower, thinner tip at the end, which also culminates in a point at the end.
3. The third tube has a narrow, cylindrical, clear glass shaft with a rounded closed end. The other end is broken.
4. The final tube is the smallest in length, although the diameter is slightly larger than the third tube. It seems to be slightly bent in the middle, with dark, smoky, pointy tips at each end (small electrodes?)
Signedunsigned
Curatorial RemarksR. Forsberg #039-042; one tube is broken.
FunctionThese glass tubes may have been used to create different vacuum tube arrangements by placing electrodes and different components inside the tube, then sealed in a vacuum or a rarefied substance (gas, mercury, etc.)
Also possibly filled with gases for spectroscopy.
Also possibly filled with gases for spectroscopy.
Forster
Date: 1950-1960
Accessories: spare ink cartridges; pen attachments
am auxiliary box containing small Allen wrench, scotch tape, extra parts, and storage instructions
Object number: 1999-1-0054
Distillation Products Industries
Date: circa 1940
Object number: 1998-1-0034
Sylvania
Date: late 19th-early 20th Century
Object number: RS0368
English
Date: 1800-1850
Accessories: green shagreen-covered case with silver framing and parts
Object number: DW0231
Thomson-Houston Electric Company
Date: late 19th-early 20th Century
Object number: 1997-1-0767
Alvan Clark and Sons
Date: 1910
Accessories: shipping crate, terrestrial eyepiece, dust cap, mount and tripod (2003-1-0077b)
Object number: 2003-1-0077a
German
Date: circa 1955
Accessories: cardboard box, one end-flap broken
Object number: RS0100a,b
Cambridge Instrument Company, Inc.
Date: circa 1940
Object number: 1996-1-0304
