Projector part

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Ingenium, 1987.1183.010
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OBJECT TYPE: N/A
DATE: Unknown
ARTIFACT NUMBER: 1987.1183.010

MANUFACTURER: KELSH INSTRUMENT CO. INC.
MODEL: Unknown
LOCATION: Baltimore, Maryland, United States of America

More Information

General Information

Serial #: N/A
Part Number: 10
Total Parts: 19
AKA: projector component
Patents: N/A
General Description: COMPONENTS ARE METAL; SOME SYNTHETIC HOSES, CORDS & FITTINGS/ GLASS OPTICS

Dimensions

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

Length: 60.0 cm
Width: 26.0 cm
Height: 23.0 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: KELSH
Country: United States of America
State/Province: Maryland
City: Baltimore

Context

Country: Canada
State/Province: Ontario
Period: KELSH PLOTTERS WERE FIRST USED IN CANADA IN MID-1950s & WERE USED INTO 1970s
Canada: KELSH PLOTTERS REPLACED MULTIPLEX PLOTTERS AS THE PRINCIPLE PLOTTING UNITS OF BOTH MILITARY & DEPT. OF ENERGY, MINES & RESOURCES (EMR) IN CANADA IN EARLY 1960s (REF 1, P.2).
Function: TO PROJECT STEREOSCOPIC MODEL IN ORDER TO INTERPRET, MEASURE & PLOT DATA GATHERED FROM AERIAL SURVEY PHOTOGRAPHS.
Technical: KELSH PLOTTER IS A PROJECTION INSTRUMENT USING FULL SIZE DIAPOSITIVES (SAME SIZE AS AERIAL CAMERA WHICH TOOK PHOTOS). IT CONFINES ILLUMINATION TO AN AREA APPROX. 1 SQ INCH ON EACH DIAPOSITIVE-ONLY THE PART OF THE MODEL APPEARING ON THE TRACING TABLE PLATEN IS ILLUMINATED. THIS RESULTS IN EXCELLENT RESOLUTION OF STEREOSCOPIC IMAGE (REF 2, P.175; REF 1, P.47).
Area Notes: Unknown

Details

Markings: ‘DIST.FREE' & ‘.130 GLASS' incised on rods. ‘LENS NO. 1871' incised on plate on frame. ‘2' incised twice on central section.
Missing: N/A
Finish: PRINCIPALLY GREY, BLACK OR DRAB-GREEN IN COLOUR
Decoration: N/A

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

KELSH INSTRUMENT CO. INC., Projector part, Unknown Date, Artifact no. 1987.1183, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/item/1987.1183.010/

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