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B712-7 Telegraph sounder and key, used by Posts and Telegraphs Postmaster General's Department, Australia, 1920-1937. Click to enlarge.

An electric telegraph sounder and key.

Made 1920-1937

‘Resonator and sounder. The speed with which morse code messages can be read by sound is greater than by sight. The sounder consists of an electromagnet relay which by means of a suitably shared anvil makes a sharp noise when activated by electric current. to enable operators to define these sounds is more clearly the sounder is placed in a resonator to amplify the coded message as it is being received.” from label accompanying accession number B712.

Summary

Object No.

B712-7

Object Statement

Telegraph sounder and key, used by Posts and Telegraphs Postmaster General's Department, Australia, 1920-1937

Physical Description

Telegraph sounder and key, wood / metal / Bakelite, maker unknown, used by Posts and Telegraphs Postmaster General's Department, Sydney, New South Wales, Australia, 1920-1937

A telegraph sounder and key conisting of a rectangular wooden base with a brass mechanism and hammer. The hammer has a black circular handle or knob made from Bakelite.

Marks

On the surface of the wooden base is engraved text that reads'PMG'. The number '9082' is on one end of the wooden base and is also engraved into the surface of the brass mechanism.

Dimensions

Height

82 mm

Width

75 mm

Depth

145 mm

Production

Made

1920-1937

History

Notes

The equipment and photographs were received from the Deputy Director, Posts and Telegraphs.

Cite this Object

Harvard

An electric telegraph sounder and key. 2018, Museum of Applied Arts & Sciences, accessed 20 May 2019, <https://ma.as/214676>

Wikipedia

{{cite web |url=https://ma.as/214676 |title=An electric telegraph sounder and key. |author=Museum of Applied Arts & Sciences |access-date=20 May 2019 |publisher=Museum of Applied Arts & Sciences, Australia}}

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