General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Glass/ Paper label

Dimensions

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

Length

N/A

Width

N/A

Height

15.6 cm

Thickness

N/A

Weight

N/A

Diameter

15.0 cm

Volume

N/A

Lexicon

Group

Lighting Technology

Category

Lighting device parts

Sub-Category

N/A

Manufacturer

AKA

Holophane

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

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 part of an electric lighting fixture which shields the lamp bulb and diffuses the light produced by the lamp into the surrounding area

Technical

Holophane is one of the oldest manufacturers of lighting-related products in the world; founded in 1898 in London, England. They are a UK (based in Milton Keynes, England) and US manufacturer (based in Newark, Ohio) of lighting fixtures for commercial, industrial, outdoor, and emergency applications. The hallmark of their products is a glass reflector/refractor. In addition, they manufacture lenses for street lights, including General Electric, Cooper Lighting, and Lithonia Lighting. Holophane has been integral in the Illuminating Engineering Society of North America since its inception in 1906, with the first meeting being held in their headquarters. The hallmark of Holophane luminaires, or lighting fixtures, is the borosilicate glass reflector/refractor. The glass prisms provide a combination of uplight and downlight to illuminate any environment evenly without creating dark spots or glare. This ribbed glass shade/reflector, called "Holophane" or "Holophane style/type" is iconic in "vintage" style lighting, and is licensed and copied throughout the lighting industry. The trademarked name for their borosilicate glass is Endural. Holophane is a part of Acuity Brands.

Area Notes

Unknown

Details

Markings

Raised lettering on neck reads 'HOLOPHANE'/ Raised vertical lettering on side reads 'THIS SIDE TOWARDS STREET'/ Almost illegible writing on label reads in part 'Holophane'

Missing

Appears complete

Finish

Colourless translucent glass

Decoration

N/A