General Information

Serial #

N/A

Part Number

1

Total Parts

2

AKA

N/A

Patents

N/A

General Description

Metal and glass, leather case

Dimensions

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

Length

6.0 cm

Width

7.5 cm

Height

1.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Mathematics

Category

Calculating devices

Sub-Category

N/A

Manufacturer

AKA

Halden

Country

England

State/Province

Unknown

City

Manchester

Context

Country

Canada

State/Province

Ontario

Period

Unknown

Canada

Roy Belshaw was a life-long Waterous employee. In 1993, he rescued (with permission) an extraordinary collection of Waterous company material from the dumpster into which it had been thrown. Over and above the historical significance of the Waterous firm, it is the completeness of the records saved by Mr. Belshaw that make this collection unique. For once, a detailed internal study of a Canadian firm like this can be carried out against its record of production. The collection also includes a great deal of material that documents the social and plant life of the workers.

Function

Used for calculations.

Technical

The Waterous firm (under various names) was one of Canada's pioneering equipment manufacturers. Located in Brantford, it was one of Canada's longest lasting heavy equipment manufacturers - producing agricultural, steam, fire, and especially logging equipment from 1844-1992.

Area Notes

Unknown

Details

Markings

Print around thumb nut reads: "MADE IN ENGLAND"/ Print on other side reads: "PATENT CIRCULAR SLIDE RULE/ HALDEN'S CALCULEX"/ There are a series of numbers around the dial face of both sides.

Missing

N/A

Finish

Silver metal and glass. Print is double sided and the inner disc is rotated by the thumb nut in the centre.

Decoration

N/A