General Information

Serial #

46955

Part Number

1

Total Parts

1

AKA

N/A

Patents

N/A

General Description

Metal (some appears to be brass) & synthetic

Dimensions

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

Length

11.0 cm

Width

9.0 cm

Height

7.4 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Astronomy

Category

Miscellaneous

Sub-Category

N/A

Manufacturer

AKA

ELECTROMATIC

Country

United States of America

State/Province

Unknown

City

Unknown

Context

Country

Canada

State/Province

Ontario

Period

Unknown

Canada

Used at Dominion Observatory.

Function

A synchro is a type of rotary electrical transformer that is used for measuring the angle of a rotating machine such as an antenna platform.

Technical

The primary winding of the transformer, fixed to the rotor, is excited by an AC current, which by electromagnetic induction causes currents to flow in three star-connected secondary windings fixed at 120 degrees to each other on the stator. The currents can be used to directly drive an electric motor that will rotate in unison with the synchro. In the latter case, the whole device is also called a selsyn (a word made up from self-synchronizing).

Area Notes

Unknown

Details

Markings

Mfr's plate: 'GENERAL RAILWAY SIGNAL CO./ ROCHESTER, N.Y./ SELSYN GENERATOR/ MODEL 2J1F1/ SER NO. 46955/ '15-57.5V/ 400 CY./ MADE BY ELECTROMATIC TYPEWRITERS, INC. DIV. OF/ I.B.M. CORP./ MADE IN U.S.A./ N.P. 95429F-GRS'/ Handwriten on side '21/10/52/ 10/4/52 FAST' WITH ARROW POINTING UP/ Marked at intervals at one end 'S1/ R2/ R1/ S3/ S2'

Missing

N/A

Finish

DK grey with transparent pieces partially encircling cylinder near one end, brass-coloured support piece

Decoration

N/A