Vacuum tube

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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

CITE THIS OBJECT

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://collection.ingeniumcanada.org/en/id/1969.0848.001/

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