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

Inventory Number: 87609

Date: Early 20th Century

Maker Details: Unknown

Inscription: "A" and "E" burnt into upper surface of base near top terminals. "B" and "K" burnt into upper surface of base near bottom terminals.

Size: 125 mm (length) x 95 mm (width) x 50 mm (depth) [maximum dimensions]

Materials: Wood, brass, copper, fibre, ebonite.

Other Given Number(s): Science Museum Loan 1959-236.


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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