General Information

Serial #

N/A

Part Number

7

Total Parts

24

AKA

N/A

Patents

N/A

General Description

Brass, lead, and possibly other metals.

Dimensions

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

Length

24.0 cm

Width

19.5 cm

Height

7.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Observation equipment

Sub-Category

N/A

Manufacturer

AKA

Warner Swasey

Country

United States of America

State/Province

Ohio

City

Cleveland

Context

Country

Canada

State/Province

Ontario

Period

From 1905-1974

Canada

A major piece of the original equipment of the Dominion Observatory, it played an important role in the early astronomical research done in Canada, & later was extensively used in public education programmes.

Function

Used when telescope movements were weight driven (before conversion to electric motor). Can adjust degree to which weights swing apart, and so alter timing. (See component list in Supp. Info.)

Technical

Telescope which had optics made by a premier optician of the time & mounting also made by one of the best manufacturers of the time. It was one of the largest refracting telescopes in the world when it was built. The original 15" doublet was unusual as flint element placed ahead of crown - supposed to help reduce condensation problems.

Area Notes

Unknown

Details

Markings

Each weight bears scale (on one side only, opposing) divided in single increments "F 20- 0-20 S", and labelled at intervals of 5.

Missing

N/A

Finish

Unknown

Decoration

N/A