glass cylinder
Datecirca 1917
Inventory Number1997-1-0498
ClassificationInductance
Subject
Maker
American
?
Cultural Region
Dimensions37.1 x 37.1 x 11.7 cm (14 5/8 x 14 5/8 x 4 5/8 in.)
Material
DescriptionGlass cylinder with copper plating up 2/3 of it's height with a copper wire. Similar to the glass cylinders accompanying 0507a. From instrument card of 0507a: "Variable Inductance...A hard rubber cylinder wound with heavy wire. The cylinder is turned by a handle, and supported horizontally on a wooden frame. A slider moves along a noted scale as the cylinder is turned. Also in the frame, on which the cylinder is mounted, are two circular depressions for two glass cylinders with copper plating."
Signedunsigned
Curatorial RemarksHas written on it: "#3" in chalk and on side "Inspected and accept 10-10-17".
FunctionCylinder used for variable inductance.
Wireless Specialty Apparatus Company
Date: circa 1908
Accessories: part of a set that includes a variable inductance (0507a) and another glass cylinder (0507b)
Object number: 0507c
Wireless Specialty Apparatus Company
Date: circa 1908
Accessories: part of a set that includes an LC resonant circuit with variable inductance (0507a) and another glass Leyden jar (0507c)
Object number: 0507b
Wireless Specialty Apparatus Company
Date: circa 1908
Accessories: copper-plated glass cylinders (0507b and 0507c)
Object number: 0507a
Hammond Typewriter Company
Date: circa 1923
Accessories: four Hammond type shuttles for different type faces, each with a wooden storage box; four laminated paper rectangles with symbol placement guide; instruction book, instruction sheets, advertisements, and correspondence (in object file)
Object number: 1996-1-0373
Rudolph Koenig
Date: circa 1865
Object number: 1997-1-0892d
Rudolph Koenig
Date: circa 1865
Object number: 1997-1-0892c
Rudolph Koenig
Date: circa 1865
Object number: 1997-1-0892g
Rudolph Koenig
Date: circa 1865
Object number: 1997-1-0892f
See also/See also
