Holtz current direction tube

Description (Brief):

Made of clear glass. For demonstrating the character of discharge produced by various high potential sources, such as induction coils, high voltage transformers, and highly charged condensers. The direction of the current flow in the discharge is indicated by the branch of the tube in which the glow appears. Consists of two parallel tubes, containing a series of funnel-shaped obstructions, and connected at the ends by short tubes to which the electrodes are connected. A direct current discharge will cause only one branch of the tube to glow, while an alternating current will cause both branches to glow. With an induction coil one branch will be more brilliantly lighted than the other. Marked "E3748" and "E4530" near one electrode.

Location: Currently not on view

See more items in: Work and Industry: Electricity

Exhibition:

Exhibition Location:

Credit Line: from Wellesley College

Data Source: National Museum of American History

Id Number: 1981.0043.02Catalog Number: 1981.0043.02Accession Number: 1981.0043

Object Name: discharge tube

Measurements: overall: 4.8 cm x 5.2 cm x 65.6 cm; 1 7/8 in x 2 1/16 in x 25 13/16 in

Guid: http://n2t.net/ark:/65665/ng49ca746ad-2c87-704b-e053-15f76fa0b4fa

Record Id: nmah_1390508

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