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Ingenium, 1992.2494.001
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OBJECT TYPE: turn/rotary/heater/double pole/surface/indicating
DATE: 1904–1915
ARTIFACT NUMBER: 1992.2494.001

MANUFACTURER: Diamond H
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: porcelain base & switch handle/ brass shell/ metal parts

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: 7.8 cm
Thickness: N/A
Weight: N/A
Diameter: 9.3 cm
Volume: N/A

Lexicon

Group: Energy-electric
Category: User site
Sub-Category: N/A

Manufacturer

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

Context

Country: North America
State/Province: Unknown
Period: early 20th century
Canada: An American made switch of a type used in Canada. Part of a large & varied collection of over 7500 electrical items acquired & documented by Ontario Hydro in the 1960s. The collection was thought to be the largest & most comprehensive of its kind in Canada & was donated to the National Museum of Science & Technology in 1992.
Function: An electrical wiring device used to make or break a connection in an electrical circuit, specifically to regulate in a heating device
Technical: Rotary switches turn in one direction, giving on-off-on-off alternately (Ref. 3). Diamond H, previously named the Hart Mfg. Co., was a company formed by American Waldo Hart in 1890. The first push-button switch made by Hart & Co. appeared in 1899. By 1915 Diamond had become part of Hart & Hegeman. (Ref. 1)
Area Notes: Unknown

Details

Markings: incised lettering on shell reads "‘DIAMOND H' SWITCH", "UND LAB. INSP.", & "35A. 125V. 20A. 250V."/ white lettering on indicator reads "OFF LOW MED. HIGH"
Missing: appears complete
Finish: partially glazed white porcelain/ glazed white handle switch/ nickel plated shell
Decoration: N/A

CITE THIS OBJECT

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

Diamond H, Switch, between 1904–1915, Artifact no. 1992.2494, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1992.2494.001/

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