Standard resistor
Use this image
Can I reuse this image without permission? Yes
Object images on the Ingenium Collection’s portal have the following Creative Commons license:
Copyright Ingenium / CC BY-NC-ND (Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
ATTRIBUTE THIS IMAGE
Ingenium,
2004.0372.005
Permalink:
Ingenium is releasing this image under the Creative Commons licensing framework, and encourages downloading and reuse for non-commercial purposes. Please acknowledge Ingenium and cite the artifact number.
DOWNLOAD IMAGEPURCHASE THIS IMAGE
This image is free for non-commercial use.
For commercial use, please consult our Reproduction Fees and contact us to purchase the image.
- OBJECT TYPE
- N/A
- DATE
- Unknown
- ARTIFACT NUMBER
- 2004.0372.005
- MANUFACTURER
- Leeds & Northrup Co.
- MODEL
- 4045-B
- LOCATION
- Philadelphia, Pennsylvania, United States of America
More Information
General Information
- Serial #
- 1706289
- Part Number
- 5
- Total Parts
- 12
- AKA
- N/A
- Patents
- N/A
- General Description
- metal casing and terminals/ synthetic top
Dimensions
Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.
- Length
- 9.5 cm
- Width
- 5.0 cm
- Height
- 17.4 cm
- Thickness
- N/A
- Weight
- N/A
- Diameter
- N/A
- Volume
- N/A
Lexicon
- Group
- Energy-electric
- Category
- Measurement
- Sub-Category
- N/A
Manufacturer
- AKA
- Leeds Northrup
- Country
- United States of America
- State/Province
- Pennsylvania
- City
- Philadelphia
Context
- Country
- Canada
- State/Province
- Ontario
- Period
- Unknown
- Canada
-
An instrument used in the Calibration Unit of the Instrument Division of the Meteorological Branch of the Department of Transport of the Government of Canada. The Meteorological Branch became the Atmospheric Environment Service in 1971 and so this instrument was probably manufactured before that date. Part of a large collection of meteorological instruments acquired from the Meteorological Service of Canada (previously Atmospheric Environment Service) by the CSTM since 1967. MSC is the government agency responsible for collecting and disseminating meteorological data and forecasts in Canada. It was founded in 1871 in Toronto where it is still headquartered. The MSC was originally on the University of Toronto downtown campus but moved to Downsview in 1971 on land owned by UofT. The headquarters houses laboratories, research facilities and calibration and instrument maintenance facilities (now largely contracted out). - Function
-
A standard resistor is a resistor adjusted with high accuracy to a specified value, is little affected by variations in temperature and is substantially constant over long periods of time; this instrument was used in a meteorology instrument calibration unit to calibrate digital meteorological instruments such as barometers and thermometers. - Technical
-
An example of a standard resistance used for calibrating instruments. Leeds and Northrup's 1940 and 1946 catalogues list resistance model numbers 4020 to 4040 National Bureau of Standards type resistors, described as primary standards of resistance (Refs. 1-2). The 2030-B to 4045-B resistors would have been introduced at a later date. This type of resistance has four terminals with the heavy outer current terminals connected into the circuit and the lighter, inner terminals used to measure the potential drop. The resistance coils are mounted in oil in hermetically-sealed metal cases (Ref. 3). - Area Notes
-
Unknown
Details
- Markings
- incised white lettering on top reads '100000 OHMS/ CAT. 4045-B/ LEEDS & NORTHRUP CO./ PHILA, PA. MADE IN U.S.A./ 1706289'/ label on casing reads ‘GOVERNMENT OF CANADA/ METEOROLOGICAL BRANCH/ INSTRUMENT DIVISION/ CALIBRATION UNIT/ C16-067D/ DEPARTMENT OF TRANSPORT'/ inventory label reads ‘ASCL JAN 84/ DS-0117/ label reads ‘CALIBRATION/ BY NRC DATE 04/87/ DUE 100,000'/ gold label reading ‘Environment Canada/ Environnement Canada/ Atmospheric Environment/ Environnement atmospheric'/ handwritten label reads '#297'
- Missing
- appears complete
- Finish
- grey painted casing with plated parts/ black synthetic
- Decoration
- N/A
CITE THIS OBJECT
If you choose to share our information about this collection object, please cite:
Leeds & Northrup Co., Standard resistor, Unknown Date, Artifact no. 2004.0372, Ingenium – Canada’s Museums of Science and Innovation, http://collection.ingeniumcanada.org/en/id/2004.0372.005/
FEEDBACK
Submit a question or comment about this artifact.