General Information

Serial #

18180

Part Number

1

Total Parts

1

AKA

Standard inductor

Patents

N/A

General Description

metal casing, contacts and parts/ synthetic casing top and parts

Dimensions

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

Length

17.4 cm

Width

16.6 cm

Height

20.3 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Meteorology

Category

Miscellaneous

Sub-Category

N/A

Manufacturer

AKA

GENERAL RADIO

Country

United States of America

State/Province

Massachusetts

City

Concord

Context

Country

Canada

State/Province

Ontario

Period

mid 1950's to 1970's

Canada

An instrument of a type used by the Meteorological Service of Canada, probably in its calibration laboratories. 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

An inductor is a conductor wound into a coil to increase its inductive intensity, used for introducing inductance onto an electric circuit; this type is a standard of self-inductance for use as a low-frequency reference or working standard in a laboratory.

Technical

An example of a standard inductor used for calibrating instruments. The 1482-L standard inductor first appears in General Radio's 1954 catalogue (Ref. 1). The inductor is a symmetrically wound toroid on a ceramic core. It is supported in a mixture of ground cork and silica gel with the whole assembly cast with potting compound into a cubical aluminum case. There are three terminals, two for inductor leads and the third connected to the case to provide a two or three terminal standard. The 1482-L standard inductor has a nominal inductance of 100 mh (Ref. 2). The last GR catalogue in the CMST trade literature collection to list the 1482 standard inductor was issued in 1972 (Ref. 2). In 2000 IET Labs acquired the GenRad standards, decade box, audio and strobe product lines and in 2007 continued to market, service and support these products, including the 1482 series of standard inductors (Ref. 3).

Area Notes

Unknown

Details

Markings

black lettering on top reads '100 mH +-0.1%/ 1482-L STANDARD INDUCTOR/ GENERAL RADIO COMPANY/ CONCORD MASSACHUSETTS USA/ REFER TO CALIBRATION CERTIFICATE'/ incised 'SERIAL 19180'/ inventory tag reads 'ASCL FEB 84/ DS-0133'

Missing

appears complete

Finish

grey crinkle finished casing and handle/ light grey top/ plated handles

Decoration

N/A