Lamp bulb, discharge

Use this image

Can I reuse this image without permission? Yes

Object images on the Ingenium Collection’s portal have the following Creative Commons license:

ATTRIBUTE THIS IMAGE

Ingenium, 1992.2981.001
Permalink:

Ingenium is releasing this image under the Creative Commons licensing framework, and encourages downloading and reuse for non-commercial purposes. Please acknowledge Ingenium and cite the artifact number.

DOWNLOAD IMAGE

PURCHASE THIS IMAGE

This image is free for non-commercial use.

For commercial use, please consult our Reproduction Fees and contact us to purchase the image.

OBJECT TYPE: fluorescent/tube/single pin/instant start
DATE: 1950
ARTIFACT NUMBER: 1992.2981.001

MANUFACTURER: General Electric
MODEL: 96T12 Deluxe Warm White Instant Start
LOCATION: United States of America

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 2
AKA: N/A
Patents: N/A
General Description: Glass tube coated with white phosphor/ metal parts/ synthetic parts

Dimensions

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

Length: 238.5 cm
Width: N/A
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: 3.8 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: North America
State/Province: Unknown
Period: circa1950+
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 illumination by means of an electric current which excites mercury vapour in a glass tube, producing short-wave ultraviolet light that then creates fluorescence, producing visible light.
Technical: Instant-start type bulbs required no starter switches, lowering the cost of maintenance. To allow for an instant start, the lamp bulb contained a loose overwind of fine (0.7 mil.) tungsten wire added to a coil of modified dimensions. The overwind performed a double function. First, it reduced sputtering time by rapidly reaching the emitting temperature when the arc first struck; and second, it acted as a 'basket' to hold a large quantity of emission material tightly. When the first lamps of this design were manufactured, they were affected by end discolouration. This problem was resolved in 1947 by using a cathode shield made of nickel or iron.
Area Notes: Unknown

Details

Markings: Gold lettering on glass reads 'GENERAL GE [logo] ELECTRIC/ 96" T12 DE LUXE WARM WHITE/ MADE IN U.S.A.'
Missing: Appears complete
Finish: White tube/ metallic and black end caps
Decoration: N/A

CITE THIS OBJECT

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

General Electric, Lamp bulb, discharge, circa 1950, Artifact no. 1992.2981, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1992.2981.001/

FEEDBACK

Submit a question or comment about this artifact.