Device that makes the morse signals of a telegram message audible
In a wooden box on five wooden feet. Made around 1900 by the firm Breguet in Paris. The detachable cap has a number of holes in it to let the sound pass through. The bottom plate has five brass binding posts, marked "S", "P" and "I", "T"; the binding post in the middle has no markings.
In Europe, before 1890, telegram messages were exclusively recorded using a "telegraph", a device that wrote the message on a paper strip. Later a "sounder" was used to make morse signals audible, so that the operator could write down the telegram message directly.
In The Netherlands this device was called "klopper"; in Anglo-Saxon countries "sounder"; in France "parleur".
Data
Serial number: 8320
Dimensions (whd): 15 x 12.5 x 9 cm
Made in: 1900
Purchased in: 2013
Sold in: 2023
 
The device with its cap removed
Morse signals are made audible by the movement of a horizontal bar or anchor. The anchor is attracted and released by an electromagnet. This makes a knocking noise that is amplified by the base of the device. The freedom of movement of the anchor is set with the upper screw.
The bottom of the device

This page was last edited on 27.11.2023