General Information

Serial #

1837

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

WOODEN BOX HAS BAKELITE TOP PLATE, COPPER SWITCH BAR, COPPER SWITCH PLUGS & CONNECTORS. A KEY TYPE SWITCH AND CONNECTION POINTS ARE ALSO PROVIDED, ALL COPPER. KNOBS ARE ALL BAKELITE. RESISTORS ARE IRON OR STEEL WIRE./ CW WOODEN CARRYING CASE HAVING A FOLDING STEEL HANDLE; INSIDE SUPPORTS LINED WITH GREEN FELT.

Dimensions

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

Length

22.7 cm

Width

12.3 cm

Height

5.8 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Telegraphy

Sub-Category

N/A

Manufacturer

AKA

PAUL

Country

England

State/Province

Unknown

City

London

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF INSTRUMENT USED C. 1915- 1930.

Canada

Unknown

Function

TO PROVIDE A PRECISE RESISTANCE FROM.05 OHM TO INFINITY IN STEPS OF.05,.1,.4, 1, 2, 4, 10, 20 AND 40 OHMS OR ANY COMBINED ARRANGEMENT UP TO 120 OHMS.

Technical

HIGH QUALITY RESISTANCE BOX, CONSIDERED TO BE STANDARD PIECE OF LAB EQUIPMENT. THE RESISTANCE BOX COULD BE USED WITH A GALVANOMETER AND A BATTERY, TO CALIBRATE RELAYS, MEASURE RESISTANCE BY COMPARISON, ETC.

Area Notes

Unknown

Details

Markings

Following text appears along top edge of bakelite face: " Robt.W.Paul, London,N. [up arrow symbol] IV No 1837 1915 ". " MANGANIN.BRITISH STANDARD OHMS AT 15.5 [degree symbol] CENT ". Switch bar blocks marked; top row labelled "POSITIVE POLE/ LINE OR EARTH". Bottom row labelled " LINE/ AND/ GALVR. " at left; 2nd block from left and centre bottom post labelled "GALVANOMETER". "NEGATIVE POLE" also labelled./ PT case stamped " R E 210/ No 3 " on underside; "34" stamped into edge of case door.

Missing

NONE.

Finish

POLISHED BLACK BAKELITE TOP, WITH ENGRAVED DESIGNATIONS FILLED WITH WHITE COMPOUND; SWITCH BAR DESIGNATIONS ARE FILLED WITH BLACK COMPOUND. KEY AND PLUG HANDLES ARE BLACK BAKELITE. PT BOX IS STAINED & VARNISHED; GREEN FELT SLIDE LINERS.

Decoration

N/A