General Information

Serial #

309989

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Wood (walnut) case/ bakelite/ leather/ metal, dry cell battery

Dimensions

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

Length

22.9 cm

Width

25.4 cm

Height

17.2 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Physics

Category

Thermal & thermal conductivity

Sub-Category

N/A

Manufacturer

AKA

Brown Instrument

Country

United States of America

State/Province

Pennsylvania

City

Philadelphia

Context

Country

Unknown

State/Province

Unknown

Period

Unknown

Canada

In 1930 Minneapolis-Honeywell established a subsidiary in Toronto, Canada where, since 1915, small inroads had been made with distributors for Minneapolis Heat Regulator Company thermostats. The company was founded in 1857 in Philadelphia by Edward Brown, inventor of the first pyrometer of American design. The Brown Instrument name has been retired. In 1934 Minneapolis-Honeywell bought Brown Instrument's assets for $2.3 million. The Brown Instrument name survived until 1949, at which point it became Philadelphia Division.

Function

: "This potentiometer has been designed primarily for checking pyrometers and thermocouples although it can be used for many other purposes requiring a sensitive potentiometer. It can also be used as a measured source of EMF for checking recording potentiometers of self-balancing type." Laboratory Equipment for Chemistry, Metallurgy, Physiology. Chicago Apparatus Co. Catalogue 45 SCIEN C5329 3002 1936 (Copy in supp info)

Technical

Until Edward Brown had invented the carbon-rod pyrometer in the mid-nineteenth century, there was no accurate way to measure the extremely high temperatures in foundries and kilns.

Area Notes

Unknown

Details

Markings

On the lower gauge between 4 & 5 'MODEL #1117', between 6 & 7 'S/N 309989'. Mfr's plate reads 'The Brown Instrument Co./Philedelphia, PA/Made in USA'

Missing

From CA of 11/19/2001 by David Daley: No - Complete

Finish

Built into a walnut wood case with the top as hinged lid/ when lid is open, top is black bakelite with black bakelite knob/ 4 selector knobs, 2 throw switches, 4 capped posts & 2 gauges/ the lower gauge is marked from 1 to 11 by 1's/ case has a leather handle in front and a snap lock for lid/ it has a metal clip under the lid

Decoration

N/A