Case, rule set

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OBJECT TYPE
PHOTOGRAMMETRIC PLOTTER
DATE
1968–1970
ARTIFACT NUMBER
2004.1368.016
MANUFACTURER
Wild Heerbrugg
MODEL
Unknown
LOCATION
Switzerland

More Information


General Information

Serial #
N/A
Part Number
16
Total Parts
16
AKA
N/A
Patents
N/A
General Description
black coated-paper covered wood case; metal fittings; fabric lined; coated paper tape

Dimensions

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

Length
24.3 cm
Width
23.0 cm
Height
3.3 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Metrology
Category
Length
Sub-Category
N/A

Manufacturer

AKA
Wild
Country
Switzerland
State/Province
Unknown
City
Unknown

Context

Country
Canada
State/Province
Ontario
Period
presumably c. late 1960s- early 1990s.
Canada
Accessory for plotter used in Canada's national mapping program c. 1960s-early 1990s, and is an example 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], this machine was the most sophisticated plotter available before digital technology. This machine was converted c. 1995-96 to digitize the motions (X,Y & Z) with the addition of encoders and a control pad which interfaced to a computer. The Kern encoders and control module were installed by Terra Surveys of Ottawa when they rented this machine for the MOM project, completing the large scale mapping of Riyadh, Saudi Arabia. The A8 was on loan to Terra for the duration of the project's digital compilation stage. [Ref. 1]
Function
To contain and protect contents when not in use.
Technical
Standard case holds 15 glass scales from Group IV (imperial graduation) set supplied as standard accessory with A8 plotter. Scales are inserted in a holder directly attached to the z column and projected under strong magnification onto a ground glass screen in front of the operator. [Ref.3, p.17] The rule [glass scale] must correspond to the model scale [instrument scale] in order to enable the operator to read the elevations. Wild provided a set of 4 tables, one for each of the 4 different groups of rules [glass scales] available, to facilitate the selection of the appropriate rule and [ratio] gear for a given plotting scale. [Ref. 2, p.32] Group IV set consists of scales 1:3200; 1:3600; 1:4000; 1:4800; 1:6000; 1:7200; 1:8000; 1:9600; 1:12 000; 1:14 400; 1:16 000; 1:18 000; 1:21 600; 1:24 000; 1:27 000 feet. Rules are unnecessary when using [Kern] digital elevation counter.
Area Notes
Unknown

Details

Markings
No markings evident.
Missing
Appears complete.
Finish
Wooden case has finely wrinkle-textured black coated paper covering; gold tone latches and hinges; light grey flocked fabric lining. Masking tape label applied to upper left side of case lid.
Decoration
N/A

CITE THIS OBJECT

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

Wild Heerbrugg, Case, rule set, circa 1968–1970, Artifact no. 2004.1368, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2004.1368.016/

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