Lamp bulb, incandescent

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OBJECT TYPE: carbon/vacuum/110V/16CP/bulb horizontally ovate/tipped/screw
DATE: 1900
ARTIFACT NUMBER: 1992.2909.001

MANUFACTURER: General Electric Co.
MODEL: Unknown
LOCATION: United States of America

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 1
AKA: N/A
Patents: N/A
General Description: Glass bulb/ metal base and parts/ carbon filament/ ceramic parts

Dimensions

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

Length: 10.4 cm
Width: N/A
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: 7.6 cm
Volume: N/A

Lexicon

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

Manufacturer

AKA: General Electric
Country: United States of America
State/Province: Unknown
City: Unknown

Context

Country: Canada
State/Province: Unknown
Period: circa 1910+
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 carbon filament inside the lamp bulb to incandescence. This type of lamp was used for directional lighting.
Technical: Early in the 19th century there was much interest in increasing of the efficiency of the incandescent lamp. By creating a specialized l filament and lamp and by the use of a reflector concentrating light in one given direction; GE produced a lamp with increased the efficiency of the incandescent lamp to less than 1 &1/2 watts per candle per unit of light. The filament was made in a four-coil spiral so as to give the maximum amount of light from the tip end of the lamp. The umbrella type of bulb, with a reflecting surface behind, secured a three-fold concentration of light in the given direction. The lamps were backed with a reflecting compound giving a highly polished, mirror-reflecting effect, with a coloured outside coating. The lower half of the lamp could be plain or frosted. The plain silvered lamp was best for decorative lighting and frosted as desk or reading lamps.
Area Notes: Unknown

Details

Markings: Indented lettering on base reads 'Patented/ Nov. 8. 1904/ Nov.22. 1904'
Missing: Appears complete
Finish: Colourless transparent glass/ gold coloured base/ metallic parts/ black ceramic
Decoration: N/A

CITE THIS OBJECT

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

General Electric Co., Lamp bulb, incandescent, circa 1900, Artifact no. 1992.2909, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1992.2909.001/

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