Heliograph

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Ingenium, 1985.0668.001
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OBJECT TYPE
PORTABLE/5 IN.
DATE
Unknown
ARTIFACT NUMBER
1985.0668.001
MANUFACTURER
Unknown
MODEL
HELIO 5-INCH MK.V
LOCATION
Unknown

More Information


General Information

Serial #
B 38094
Part Number
1
Total Parts
8
AKA
N/A
Patents
N/A
General Description
Heliograph made from brass/leather carrying case/glass reflecting mirrors/tin spare mirror box/canvas carrying strap.

Dimensions

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

Length
22.0 cm
Width
16.5 cm
Height
8.5 cm
Thickness
N/A
Weight
N/A
Diameter
N/A
Volume
N/A

Lexicon

Group
Exploration and Survey
Category
Survey equipment
Sub-Category
N/A

Manufacturer

AKA
Unknown
Country
Unknown
State/Province
Unknown
City
Unknown

Context

Country
Unknown
State/Province
Unknown
Period
Unknown
Canada
Unknown
Function
TO PROVIDE LUMINOUS SIGNAL FOR OBSERVATION BETWEEN DISTANT POINTS DURING TRIGONOMICAL SURVEYS. THE SIGNAL IS SIGHTED BY A THEODOLITE AND THE ANGLE BETWEEN ESTABLISHED POINTS MEASURED IN ORDER TO DETERMINE DISTANCE.
Technical
ESSENTIALLY A PLANE MIRROR MOUNTED ON A TRIPOD AND TURNED BY MEANS OF A SLOW MOTION SCREW TO FOLLOW THE SUN AND CAST THE BEAM IN A CONSTANT DIRECTION. UNDER IDEAL CONDITIONS THE BEAM MAY BE OBSERVED AT A RANGE OF 100 MILES.
Area Notes
Unknown

Details

Markings
'HELIO 5" MARK V/L.A.M./NO. B 38094' incised on base./ Following info. stamped into leather casing: ‘Helio 5" MkV/ L.A.M./ [up arrow]'
Missing
N/A
Finish
Most of heliograph has black crinkle finish/leather is brown.
Decoration
N/A

CITE THIS OBJECT

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

Unknown Manufacturer, Heliograph, Unknown Date, Artifact no. 1985.0668, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1985.0668.001/

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