General Information

Serial #

N/A

Part Number

2

Total Parts

3

AKA

N/A

Patents

N/A

General Description

Brass and copper.

Dimensions

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

Length

5.1 cm

Width

2.2 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