General Information

Serial #

201

Part Number

1

Total Parts

4

AKA

N/A

Patents

N/A

General Description

.1 WOODEN BOX HAS COATED CLOTH COVERING; METAL, GLASS AND SYNTHETIC WORKING PARTS. FABRIC COVERING ON BATTERY CONNECTION CABLES..2-.3 PAPER TAPE ON WOODEN SPOOLS..4 METAL CRANK HANDLE HAS WOODEN KNOB. PT BATTERY CASE IS PAPER; METAL FITTINGS. PT VACUUM TUBE HAS GLASS, METAL & SYNTHETIC COMPONENTS.

Dimensions

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

Length

27.0 cm

Width

18.5 cm

Height

18.5 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Communications

Category

Telegraphy

Sub-Category

N/A

Manufacturer

AKA

INSTRUCTOGRAPH

Country

United States of America

State/Province

Illinois

City

Chicago

Context

Country

North America

State/Province

Unknown

Period

PROBABLY USED BETWEEN C. 1935 AND 1945

Canada

Unknown

Function

USED TO PRACTICE DECIPHERING MORSE CODE.

Technical

AN EXAMPLE OF EARLY EQUIPMENT USED TO AUTOMATE THE TEACHING OF MORSE CODE. SPRING DRIVEN MOTOR DRAWS A PUNCHED PAPER TAPE OFF A REEL & THROUGH A SPRING CONTACT, WHERE IT MAKES OR BREAKS AN ELECTRICAL CURRENT BEFORE BEING TAKEN UP ON A 2ND REEL. CURRENTIS MODULATED BY A VACUUM TUBE OSCILLATOR. MONITORING WITH HEADPHONES, THE USER HEARS "BEEPS" RESEMBLING THE CODED SIGNALS OF RADIOTELEGRAPHY [REF.1]

Area Notes

Unknown

Details

Markings

.1PT LABEL AFFIXED TO INSIDE OF LID: ' MFD. BY/ INSTRUCTIGRAPH CO./ 912 LAKESIDE PLACE/ CHICAGO, - ILLINOIS/ PATENT NO. 1,725,145' "178" HANDWRITTEN IN PENCIL ON LABEL/ METAL PLATE ON SIDE: '201'/ STAMPED IN [speed] SCALE: 'F 80 S'. LOCKS MARKED "EAGLE LOCK CO./ TERRYVILLE, CONN./ MADE/ IN/ U.S.A."/ PRINTING ON pt BATTERY CASE INCLUDES: 'NO 771 4 1/2 VOLTS/ EVEREADY/ TRADE MARK/ RADIO C BATTERY/ NATIONAL CARBON COMPANY/.../ MADE IN CANADA/ PATENTED/ 1927, 1929,/ 1930, 1931'. pt VACUUMTUBE MARKED "MADE IN/ 30/ CANADA/ GE/ GENERAL ELECTRIC/ RADIOTRON" and "LICENSED ONLY TO EXTENT/ INDICATED ON CARTON".

Missing

METAL COLLAR AROUND CRANK HOLE; PART OF BACK PANEL; ADDITIONAL SPOOLS AND PAPER TAPE; INSTRUCTION BOOKLET [REF 2]

Finish

.1 CASE HAS FAUX BLACK LEATHER COVERING ON EXTERIOR; SHINY SILVER METAL FITTINGS AND SELECTED COMPONENTS; GREEN, BLACK AND RED WOVEN FABRIC COVERING ON CABLES..2-.3 VARNISHED WOODEN SPOOLS HOLD BEIGE PAPER TAPE..4 SILVER METAL CRANK HANDLE HAS TURNED WOODEN KNOB, PAINTED BLACK. PT BATTERY CASING IS OFF-WHITE, WITH BLUE, ORANGE AND BLACK MARKINGS. PT VACUUM TUBE'S CLEAR GLASS SLEEVE HAS BEEN PARTIALLY SILVERED; BLACK BASE.

Decoration

N/A