General Information

Serial #

N/A

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

BRASS FRAMES AND SMALL PARTS/ IRON MAGNETIC PARTS MOUNTED ON WOOD BASE WITH HEAVY IRON COVER.

Dimensions

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

Length

21.6 cm

Width

12.7 cm

Height

12.7 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Railway Transportation

Category

Operations

Sub-Category

N/A

Manufacturer

AKA

Unknown

Country

Unknown

State/Province

Unknown

City

Unknown

Context

Country

Unknown

State/Province

Unknown

Period

UNKNOWN

Canada

USED BY TRAIN DISPATCHERS AND STATION AGENTS IN REMOTE LOCATIONS.

Function

USED AS PART OF A CODED SIGNALLING SYSTEM. USED IN TRAIN STATIONS TO SIGNAL ON MULTI CONNECTION TELEPHONE CIRCUITS (ORDER WIRE) OR FOR ANY OTHER SIGNALLING REQUIREMENT.

Technical

A VERY EARLY METHOD OF SELECTIVE SIGNALLING. BELL WAS WORKING ON A SYSTEM OF (HARMONIC SIGNALLING), A DEVICE THAT USED AUDIO TONES THAT OPERATED TUNED REEDS AT THE REMOTE LOCATION TO REPLACE THE MECHANICALDE- VICE. WHEN HE REALIZED THAT IF IT WERE POSSIBLE TO CARRY SIGNALLING TONES OVER WIRES, WHY NOT THE HUMAN VOICE.

Area Notes

Unknown

Details

Markings

STAMPED ON BASE: 'NO. 137'.

Missing

From CA of 10/07/1996 by Kevin Machan: Undetermined

Finish

BLACK ENAMEL CASE, NATURAL FINISH WOOD BASE.

Decoration

N/A