General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

.1-.2 GLASS, METAL & ASBESTOS PTS/.1 ALSO HAS A PROBABLY SYNTHETIC BASE WITH FIBRE TAPE AROUND IT

Dimensions

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

Length

41.5 cm

Width

8.2 cm

Height

8.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

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

Unknown

State/Province

Unknown

Period

SODIUM LAMPS 1ST USED FOR STREET LIGHTING 1934 IN N.AMERICA/ HIGH-PRESSURE SODIUM LAMPS INTRO. IN 1964

Canada

TYPE OF LAMP USED IN CANADA FOR STREET LIGHTING/ 1ST INSTALLATION OF SODIUM STREET LIGHTING IN CANADA (AS IN U.S.) TOOK PLACE IN 1934

Function

LIGHTING/ SPECIAL/ OUTDOOR/ USED FOR STREET LIGHTING - THE VACUUM FLASK (.2) IS USED WITH THE LAMP TO MAINTAIN A SUFFICIENT TEMPERATURE FOR THE OPTIMUM OPERATION OF THE LAMP & TO PROVIDE A MORE UNIFORM LIGHT OUTPUT & WATTAGE UNDER THE WIDE VARIETIES OF TEMPERATURE & WIND VELOCITY ENCOUNTERED IN OUTDOOR OPERATION.

Technical

SODIUM VAPOUR LAMPS DIDN'T BECOME PRACTICAL UNTIL A GLASS WAS DEVELOPED WHICH WAS NOT AFFECTED BY SODIUM DEPOSITS/ LOW-PRESSURE SODIUM DISCHARGE GENERATES BARELY ENOUGH HEAT TO KEEP LAMP AT BEST WORKING TEMP. SO LAMP ENCASED IN 2-3 WALLED VACUUM FLASK/ A.1955 SINGLE EVACUATED BULB USED, COATED WITH HEAT REFLECTING MATERIAL

Area Notes

Unknown

Details

Markings

.1 STAMPED ON BULB 'MADE IN U.S.A./ GE [LOGO]/ SODIUM VAPOUR LAMP/ NA 9'/.2 'GE [LOGO]/ 71-G/ U.S. PAT. 1984426/ 2042148 2056648/ 2116710/ MADE IN U.S.A.'/ HANDWRITTEN HYDRO# ON BOTH.1 &.2 '1034'

Missing

N/A

Finish

.1 TRANSPARENT, SLIGHTLY CLOUDY BULB, IRREGULAR WHITE DEPOSITS ON INSIDE OF GLASS, SILVERTONE & BRASSTONE PTS, BLACK BASE/.2 TRANSPARENT, COLOURLESS GLASS, COPPER COLOUR WIRE INSIDE, SILVERTONE COLLAR

Decoration

N/A