Example of A.T.M. (Strowger) 2-level Colliery Winding Signal Indicator

maker:
Strowger Automatic Telephone Company

Example of A.T.M. (Strowger) 2-level Colliery Winding Signal Indicator, consisting of:- Indicator panel 3 6" gongs, 1 Central bellkey, 1 luminous indicator; 1 8" gong, 2 Rapper keys

Details

Category:
Mining & Ore Dressing
Object Number:
1938-684
type:
indicator
credit:
Siemens Group Services Ltd.; Automatic Telephone Manufacturing Co.

Parts

Mine telephone transformer

Mine telephone transformer

Mine telephone transformer

Object Number:
1938-684 Pt1
type:
transformer
Mine telephone transformer

Mine telephone transformer

Mine telephone transformer

Object Number:
1938-684 Pt2
type:
transformer

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