Lamp bulb, incandescent

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OBJECT TYPE: METALLIC/VACUUM/24V/TUBE/BAYONET
DATE: 1947
ARTIFACT NUMBER: 1990.0115.001

MANUFACTURER: SERVICE LAMP CO. LTD.
MODEL: W4
LOCATION: London, Ontario, Canada

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 9
AKA: N/A
Patents: N/A
General Description: Cardstock/ glass, metal & synthetic

Dimensions

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

Length: 9.5 cm
Width: 4.2 cm
Height: 3.6 cm
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Motorized Ground Transportation
Category: Automotive parts
Sub-Category: N/A

Manufacturer

AKA: SERVICE
Country: Canada
State/Province: Ontario
City: London

Context

Country: Canada
State/Province: Unknown
Period: Unknown
Canada: Made and used in Canada.
Function: A device used to provide light in automobile panels.
Technical: Tungsten is used in almost all incandescent light bulbs because it has a high melting temperature, making it conducive to producing visible light. In early light bulbs, the air was removed to create a vacuum to prevent combustion. However, as a result of the high temperature, tungsten atoms detach from the filament and cover the glass. The filament disintegrates over time and reduces the life of the bulb. Modern light bulbs are manufactured with inert gases, such as argon, which significantly reduces the loss of tungsten. Incandescent light bulbs produce the majority of their energy in the form of infrared light; approximately 10% of light is produced in the visible spectrum (Harris, "How Light Bulbs Work"). The light bulb was invented over a period of time by many inventors, however its invention is credited to Joseph Swan and Thomas Edison, who did similar work around 1878 and 1879 (Grabianowski, "10 Inventions that Changed the World").
Area Notes: Unknown

Details

Markings: Box: TOP- 'SERVICE/ AUTOMOBILE LAMPS/ SERVICE LAMP CO./ LIMITED/ LONDON CANADA'/ SIDE- 'SERVICE/.45 [CENT SIGN]/ NO. W4/ VOLTS 24/ AMPS.35/ BASE MIN. BAY/ BULB T3 1/4'/ Bottom: 'THE "MAZDA" LAMP CONTAINED HEREIN IS MANUFAC-/ TURED BY SERVICE LAMP COMPANY, LIMITED, UNDER/ LICENSE FROM CANADIAN GENERAL ELECTRIC COMPANY, LIMITED, UNDER ONE OR MORE OF THE FOLLOWING LETTERS/ PATENT OF THE DOMINION OF CANADA:2539865; 254642 AND OTHERS DATED 1929 TO 1947 INCLUSIVE'/ SIDE- 'SERVICE/ AUTOMOBILE LAMPS'/ END- 'SERVICE/ LAMP CO. LIMITED/ LONDON CANADA'/ ON bulb BASE 'E. 24V'
Missing: 1 lamp bulb
Finish: Box: orange with blue & white printing/ lamp bulbs: uncoloured glass
Decoration: N/A

CITE THIS OBJECT

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

SERVICE LAMP CO. LTD., Lamp bulb, incandescent, after 1947, Artifact no. 1990.0115, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1990.0115.001/

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