Duoscope
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1988.1207.001
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- OBJECT TYPE
- ONE BAR/BINOCULARS
- DATE
- 1940
- ARTIFACT NUMBER
- 1988.1207.001
- MANUFACTURER
- Pritchard-Andrews Co.
- MODEL
- Unknown
- LOCATION
- Ottawa, Ontario, Canada
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 3
- AKA
- N/A
- Patents
- N/A
- General Description
- METAL & GLASS/ WOOD CASE WITH METAL HARDWARE, LEATHER HANDLE & FELT LINING
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 20.0 cm
- Width
- 15.5 cm
- Height
- 14.0 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
- Pritchard Andrews
- Country
- Canada
- State/Province
- Ontario
- City
- Ottawa
Context
- Country
- Canada
- State/Province
- Unknown
- Period
- 1940'S
- Canada
-
DEVELOPED BY THE DOMINION FOREST SERVICE OF THE DEPT. OF MINES & RESOURCES IN OTTAWA. FURTHER DEVELOPMENT GAVE RISE TO THE SEELYSCOPE BUT NONE OF THE DEVICES BECAME WIDELY USED. - Function
-
USED TO 'SUPERIMPOSE' AN AERIAL PHOTO ON TO A MAP IN SUCH A MANNER THAT BOTH HAVE THE SAME HORIZONTAL SCALE. DETAILS FROM THE PHOTO CAN BE TRACED ON TO THE MAP QUICKLY AND EASILY. - Technical
-
ALLOWS A PHOTO TO APPEAR SUPERIMPOSED & PROPERLY ADJUSTED ON A MAP, PERMITTING DIRECT TRANSFER & PREVENTING ERRORS BY MAKING POSSIBLE A SIMULTANEOUS & NATURAL OBSERVATION OF THE PHOTO & THE ACTUAL MAP SHEET. THE SIMPLICITY OF THE OPERATION RESULTS IN AN ACCELERATION IN THE RATE OF PLOTTING. - Area Notes
-
Unknown
Details
- Markings
- PLATE: 'CAN. PAT. 392431/ US PAT 2229424/ MFD BY/ PRITCHARD-ANDREWS CO/ OTTAWA'/ PAPERS ATTACHED TO INSIDE BOX LID: 'D-1/ DUOSCOPE with binoculars (on 7 1/4 " centres)/ consisting of the following:/ 1 centre assembly with binoculars/ 2 large mirrors, 6 1/4 x 7 1/4/ 2 pr. of legs/ 2 glow-motion adjustment attachments/ 1 wooden carrying case/ 2 bars'/ 'WARNING/ THE MIRRORING OF THIS DUOSCOPE IS ON THE/ FRONT SURFACE OF THE GLASS./ PREVENT INJURY BY WIPING WITH CLEAN SOFT/ MATERIAL ONLY. MOISTEN WITH ALCOHOL IF/ NECESSARY'/ 'D1' SCRATCHED ON/ HANDWRITTEN IN RED ON CASE OUTSIDE: 'DUOSCOPE/(BINOCULARS)'
- Missing
- 2 MIRRORS, 6 1/4 X 7 1/4 IN/ 2 PR OF LEGS/ 2 BARS
- Finish
- BLACK WRINKLE FINISH/ CASE - BLACK GLOSSY PAINT, GREEN FELT, BLACK HANDLE
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Pritchard-Andrews Co., Duoscope, circa 1940, Artifact no. 1988.1207, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/1988.1207.001/
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