Flat, optical
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1996.0648.001
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- OBJECT TYPE
- COMPARATOR/SURFACE
- DATE
- 1943
- ARTIFACT NUMBER
- 1996.0648.001
- MANUFACTURER
- NATIONAL PHYSICAL LABORATORIES
- MODEL
- Unknown
- LOCATION
- Teddington, England
More Information
General Information
- Serial #
- N/A
- Part Number
- 1
- Total Parts
- 3
- AKA
- N/A
- Patents
- N/A
- General Description
- .1 &.2 GLASS;.3 WOOD WITH METAL HARDWARE WITH VELVET LINING
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 14.8 cm
- Width
- 9.2 cm
- Height
- 2.7 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Astronomy
- Category
- Miscellaneous
- Sub-Category
- N/A
Manufacturer
- AKA
- NATIONAL PHYSICAL
- Country
- England
- State/Province
- Unknown
- City
- Teddington
Context
- Country
- Worldwide
- State/Province
- Unknown
- Period
- THESE FLATS WERE MADE IN 1943 & WERE IN DONOR'S POSSESSION UNTIL GIVEN TO NMST IN 1996
- Canada
-
USED BY DONOR, JOHN CORBY, FORMER CURATOR OF INDUSTRIAL TECHNOLOGY AT NMST, WHO USED THE FLATS WHEN EMPLOYED AS A GAUGE MAKER AT THE NPL (NATIONAL PHYSICAL LAB) AT TEDDINGTON, ENGLAND DURING WWII. AT THE TIME HE WAS PRODUCING GAUGES FOR PRODUCTION LINES IN WHICH MUNITIONS WERE MADE. [REF 2] - Function
-
USED IN PAIRS IN CONJUNCTION WITH A MONOCHROMATIC LIGHT SOURCE TO TEST THE FLATNESS OF A THIRD SURFACE. [REF 1] - Technical
-
THESE FLATS ARE ACCURATE TO APPROX 0.00001". THEY WERE EMPLOYED INPRODUCTION OF GAUGES SUCH AS JOHANNSEN GAUGES WHICH ARE IN TURN USED FOR MEASURING PRECISE THICKNESSES OR ANGLES. [REF 1] - Area Notes
-
Unknown
Details
- Markings
- NO MARKINGS
- Missing
- COMPLETE
- Finish
- .1 &.2 UNCOLOURED GLASS/.3 STAINED AND VARNISHED WOOD; PURPLE VELVET
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
NATIONAL PHYSICAL LABORATORIES, Flat, optical, 1943, Artifact no. 1996.0648, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/item/1996.0648.001/
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