General Information

Serial #

313

Part Number

1

Total Parts

1

AKA

viewer

Patents

N/A

General Description

metal and glass (mirror) components

Dimensions

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

Length

31.0 cm

Width

13.0 cm

Height

16.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Exploration and Survey

Category

Photogrammetry

Sub-Category

N/A

Manufacturer

AKA

Fairey

Country

United Kingdom

State/Province

Unknown

City

Maidenhead

Context

Country

Canada

State/Province

Ontario

Period

presumably c. 1960s- early 1990s.

Canada

Accessory used with Wild A8 Autograph [2004.1361], used in Canada's national mapping program c. 1960s-early 1990s, an example of one of the last analogue plotting devices used by the Topographic Service of Canada. With the exception of the Wild A10 [few of which were used in Canada], the A8 was the most sophisticated plotter available before digital technology.

Function

Used to align drafted map to diapositives in plotter.

Technical

A8 plotter was most often used for map compilation: this magnifier was useful when the operator was going over lines (especially contours) which had been traced with an aluminium lead. [Ref. 2] Wild offered "PR1 Profiloscope" accessory, which was similarly structured and likewise attached to the drawing point carriage of the plotting table. It's stated purpose was "... the rapid and accurate setting of successive points in straight or curved profiles and cross sections of arbitrary azimuth in the stereo model". [Ref. 3, p. 23]

Area Notes

Unknown

Details

Markings

"FAIREY SURVEYS LTD/ MAIDENHEAD ENGLAND/ SERIAL No 313" stamped in black ink on casing.

Missing

None.

Finish

Dull green enamel painted metal frame & casing; black painted and silver metal fittings; mirrors.

Decoration

N/A