Bob, plumb

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OBJECT TYPE: Metal
DATE: 1890
ARTIFACT NUMBER: 1979.0865.003

MANUFACTURER: Unknown
MODEL: Unknown
LOCATION: Unknown

More Information

General Information

Serial #: N/A
Part Number: 3
Total Parts: 3
AKA: N/A
Patents: N/A
General Description: Aluminium alloy.

Dimensions

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

Length: 6.9 cm
Width: 2.6 cm
Height: N/A
Thickness: N/A
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Industrial Technology
Category: Tools-Hand
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: Unknown
State/Province: Unknown
City: Unknown

Context

Country: Unknown
State/Province: Unknown
Period: Unknown
Canada: Plumb bobs are used in many fields - including surveying, carpentry, construction, and mining - throughout the world. These plumb bobs, along with the others in the collection, provide a context for plumb bobs used both in and outside of Canada.
Function: Suspended from an instrument by means of a line, a plumb bob is used to determine the instrument's vertical centre or perpendicularity.
Technical: These are examples of machined plumb bobs. The plumb bob has remained relatively unchanged since antiquity. Though it can be made out of different materials and its shape may vary, the principle remains the same: a symmetrical weight is suspended from its broad end on a cord or a chain. One noticeable change in plumb bobs came during the industrial revolution, when the development of metal lathes allowed metal bobs to be more symmetrical, smooth, and aerodynamic.
Area Notes: Unknown

Details

Markings: None.
Missing: N/A
Finish: Unknown
Decoration: N/A

CITE THIS OBJECT

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

Unknown Manufacturer, Bob, plumb, after 1890, Artifact no. 1979.0865, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1979.0865.003/

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