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Coil-Type Testing Buzzer With Case, Early 20th Century

Inventory Number 87609

Item type
Object
Provenance
Presented by the Marconi Corporation.
Primary inscriptions
"A" and "E" burnt into upper surface of base near top terminals. "B" and "K" burnt into upper surface of base near bottom terminals.
Object type
Radio communication
Dimensions
Width: 95mm
Inventory No
87609
Accession Number
2004-9/651

Description

Coil-Type Testing Buzzer, in varnished wood case. With loops and hooks on both sides to assist removal of cover and reveal interior upon base. With four brass terminals upon exterior surface of base: top pair marked "A" and "E" respectively, bottom pair marked "B" and "K" respectively. Interior of case has a single brass terminal, ebonite insulation, and dual wooden coils mounted side by side with fibre-covered copper wire wrapping around individual coils.

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