Vacuum tube

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Ingenium, 1969.0848.001
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OBJECT TYPE: DETECTOR/AMPLIFIER/OSCILLATOR
DATE: 1918–1920
ARTIFACT NUMBER: 1969.0848.001

MANUFACTURER: MOORHEAD LABORATORIES
MODEL: A
LOCATION: San Francisco, California, United States of America

More Information

General Information

Serial #: 105611
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: TUNGSTEN FILAMENT/ NICKEL WIRE GRID/ SHEET NICKEL PLATE/ BRASS BASE COVER/ GLASS ENVELOPE/ SYNTHETIC BASE

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 10.0 cm
Width: 4.4 cm
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Vacuum Tubes
Category: Receiving
Sub-Category: N/A

Manufacturer

AKA: MOORHEAD
Country: United States of America
State/Province: California
City: San Francisco

Context

Country: Unknown
State/Province: Unknown
Period: Unknown
Canada: Unknown
Function: TO DETECT, AMPLIFY & OSCILLATE RADIO WAVES IN A RECEIVER
Technical: EARLY TRIODE TUBE/ AN EXAMPLE TO SHOW HISTORY OF PROBLEMS WITH PATENT INFRINGEMENTS IN U.S. & ATTEMPTS TO DEAL WITH THIS PROBLEM [SEE: 'SAGA OF THE VACUUM TUBE']
Area Notes: Unknown

Details

Markings: ETCHED ON GLASS: 'MOORHEAD LABORATORIES/ SAN FRANCISCO/ 105611/ PATENTED NOVEMBER 7, 1905/ SOLD ONLY FOR AMATEUR/ AND EXPERIMENTAL USE'/ STAMPED IN BASE COVER: 'MARCONI [ON DRAWING OF EARTH]/ TRADE MARK/ FLEMING PATENT NO. 863684/ DE FOREST AUDION/ US PATENT NOS. 841387-879532/ SOLD ONLY FOR AMATEUR/ AND EXPERIMENTAL USE'
Missing: From CA of 02/05/1998 by Pat Montero: No - Complete
Finish: UNCOLOURED GLASS ENVELOPE/ UNFINISHED METAL
Decoration: N/A

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If you choose to share our information about this collection object, please cite:

MOORHEAD LABORATORIES, Vacuum tube, between 1918–1920, Artifact no. 1969.0848, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1969.0848.001/

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