General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

BRASS LAMP; BRIGHT (NICKEL PLATING?) SILVER REFLECTOR; RESIN GRIP

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

7.5 cm

Height

11.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Lighting Technology

Category

Lighting devices

Sub-Category

N/A

Manufacturer

AKA

Justrite

Country

United States of America

State/Province

Illinois

City

Chicago

Context

Country

Canada

State/Province

Quebec

Period

THIS LAMP NEVER USED. THIS TYPE WIDELY USED C. 1910-1945. THIS MODEL MFD. 1939-1973. (REF.3, PT1&2)

Canada

THIS TYPE OF LAMP TYPICAL OF MINING LAMPS USED IN CANADA DURING PERIOD C. 1910-1950S. THIS EXAMPLE WAS PURCHASED FOR USE BY NEW CALUMET MINES LTD. (1948-1968), FOR WORK ON ZINC-LEAD DEPOSIT ON CALUMET ISLAND, PQ. (LOCATED 60 MILES FROM OTTAWA, IN THE OTTAWA RIVER). (REF. 4)

Function

TO ILLUMINATE AREA IN FRONT OF MINER.

Technical

EARLIEST MINE LAMPS WERE OIL OR CANDLE POWERED; MINE SAFETY LAMPS, WHERE FLAME WAS SHIELDED BY WIRE GAUZE SCREEN, DEVELOPED 1812-16. AS EARLY AS 1880 ELECTRIC LIGHTS HAD BEEN INSTALLED IN A COAL MINE IN ENGLAND; PORTABLE ELECTRIC LAMPS USED IN 1901. ACETYLENE LAMPS DEVELOPED IN EARLY 1900S; WIDELY USED IN USA BY 1915. ACETYLENE PROVIDED SUPERIOR ILLUMINATION, BURNED CLEANER AND PRODUCED LESS SMOKE, REDUCED RISK OF FIRE OR EXPLOSION DUE TO SPARK FROM OPEN FLAME, AND WERE DURABLE, RELIABLE & INEXPENSIVE TO OPERATE. AN ACETYLENE FLAME WILL CONTINUE TO BURN EVEN WHEN OXYGEN LEVELS ARE LOW: THE COLOR OF THE FLAME CHANGED AT APPROX. 14% OXYGEN, PROVIDING RELIABLE WARNING TO MINERS OF DIMINISHING OXYGEN LEVELS.

Area Notes

Unknown

Details

Markings

" ON/ MADE/ IN U.S.A./ PAT./ PENDING/ Streamlined/ JUSTRITE/ " stamped into metal top; " UNITED STATES OF AMERICA " stamped into base. " JUSTRITE AIR-COOLED GRIP PAT.PEND. MADE IN U.S.A " appears in raised print on resin ring surrounding base./ " No./ [ illegible- obscured by label]/ 830W " printed on box top; " 3/ R.M. 7039/ 4-41 " printed on one box flap.

Missing

NONE.

Finish

BRIGHT PLATED FINISH APPLED TO LAMP REFLECTOR.

Decoration

N/A