Lamp bulb, incandescent

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OBJECT TYPE: tungsten/vacuum/25W/220V/straight/screw
DATE: 1910–1915
ARTIFACT NUMBER: 1992.2894.002

MANUFACTURER: Westinghouse Lamp Co.
MODEL: Westinghouse Mazda
LOCATION: New York, New York, United States of America

More Information

General Information

Serial #: N/A
Part Number: 2
Total Parts: 6
AKA: N/A
Patents: N/A
General Description: Glass bulb/ metal base and parts/ tungsten filament/ ceramic parts/ paper label

Dimensions

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

Length: 13.2 cm
Width: N/A
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: 6.1 cm
Volume: N/A

Lexicon

Group: Lighting Technology
Category: Lamp bulbs
Sub-Category: N/A

Manufacturer

AKA: Westinghouse
Country: United States of America
State/Province: New York
City: New York

Context

Country: Canada
State/Province: Unknown
Period: circa 1910-1915+
Canada: An example of an American made lamp bulb used in Canada, part of a large and varied collection of over 7500 electrical items acquired and documented by Ontario Hydro in the 1960s. The collection was thought to be the largest and most comprehensive of its kind in Canada and was donated to the Canada Science and Technology Museum in 1992
Function: A device used to provide light by means of an electric current which heats up a tungsten filament inside the lamp bulb to incandescence. This type of lamp bulb was used for general lighting on 220V circuits.
Technical: This type of lamp shows the transition to tungsten concentrated filament construction. Coolidge obtained a patent for ductile tungsten in 1913. However, such lamps were commercially introduced in 1911. With drawn-tungsten wire it was easier to coil and therefore concentrate the filament as required by focusing types of lamps and the multiplicity of voltage could be eliminated because all tungsten lamps could be made for a single voltage. In 1915, three Mazda lamps had been standardized with a new concentrated-filament construction.
Area Notes: Unknown

Details

Markings: Black lettering on paper label reads 'WESTINGHOUSE/ W [logo]/ 25W MAZDA 220V'
Missing: Appears complete
Finish: Colourless and transparent glass/ gold coloured base/ black ceramic/ white paper
Decoration: N/A

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Westinghouse Lamp Co., Lamp bulb, incandescent, circa 1910–1915, Artifact no. 1992.2894, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1992.2894.002/

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