Leyden jar condenser
Datecirca 1908
Inventory Number0507c
ClassificationLeyden Jar
Subject
Maker
Wireless Specialty Apparatus Company
1907 - 1930
User
Department of Physics, Harvard University
founded 1884
Cultural Region
Place of Origin
Place of Use
Dimensions37 x 37 x 11.7 cm (14 9/16 x 14 9/16 x 4 5/8 in.)
Material
Accessoriespart of a set that includes a variable inductance (0507a) and another glass cylinder (0507b)
DescriptionA glass cylinder with its lower two thirds covered in copper plating. A cable extends from the copper.
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."
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."
In Collection(s)
Signedon cylinder: WIRELESS SPECIALTY / APPARATUS CO / [illegible]
FunctionThis set of objects very likely a rudimentary form of LC circuit (inductance-condenser). The glass cylinders with copper plating are very likely condensers. Together with an antenna, the set could be used as a radio signal receiver. Varying the inductance by turning the crank, one can change the tuning frequency.
ProvenanceFrom the Physics Department, Harvard University, 1965. Was stored in the Lyman Laboratory attic.
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
Wireless Specialty Apparatus Company
Date: circa 1908-1909
Object number: 2008-1-0117
L. E. Knott Apparatus Company
Date: 1900-1930
Accessories: part of a series of four Leyden jars that comes in a box with 4 holes cut in and knob. The series includes an extra lid and a two photographs of the jar 1997-1-0677a with their negative (in Kodak safety film)
Object number: 1997-1-0677c
Wireless Specialty Apparatus Company
Date: circa 1908
Object number: RS0850a
Wireless Specialty Apparatus Company
Date: circa 1908
Object number: RS0850b
Wireless Specialty Apparatus Company
Date: circa 1908
Object number: RS0850c
Wireless Specialty Apparatus Company
Date: circa 1908
Object number: RS0850d
Wireless Specialty Apparatus Company
Date: circa 1908
Object number: RS0850f
