A Telegraph Siphon Recorder by Muirhead & Co. Ltd, Westminster

A Telegraph Siphon Recorder by Muirhead & Co. Ltd, Westminster

£3850.00

The ‘Siphon Recorder ‘was originally invented in 1867 by Lord Kelvin. It was initially designed for use with the new trans-atlantic cables laid in 1865. These cables were over 4000 miles in length so instruments of unparalleled sensitivity were required to decode messages. The ‘Siphon Recorder’ was designed specifically for this use.

Dimensions

Width – 13.5”, Height – 13”

Circa

1880

Categories: Communication, Office Antiques, Other Technology Antiques

Description

Offered for sale a is a very rare Telegraph Siphon Recorder by Murihead 7 Co. Ltd, Westminster. The recorder in numbered 32155 and probably dates from around 1880.

The ‘Siphon Recorder ‘was originally invented in 1867 by Lord Kelvin. It was initially designed for use with the new trans-atlantic cables laid in 1865. These cables were over 4000 miles in length so instruments of unparalleled sensitivity were required to decode messages. The ‘Siphon Recorder’ was designed specifically for this use.

The design is based on a moving coil galvanometer with a powerful electromagnet, but this suspension is too delicate to carry a pen. The pen, which is a fine glass capillary with one end dipping in a reservoir of ink, is mounted on a separate suspension at the front and coupled to the moving coil by silk threads. A vibrator on this suspension keeps the pen moving to overcome static friction. A beautifully built Froment ‘Mouse Mill’ electric bipolar motor then pulls the paper tape through at the required speed. The whole instrument is housed under a lift off black lacquered mahogany cover. The cover has two opening sections allowing access to the inner workings. A drawer at the front houses the large wheel of paper.

Very few of these machines exist today with the few surviving examples mainly in museums. This machine represents a critically important step in the history of communication technology.

Dimensions:
Width – 13.5”
Height – 13”

You can read more about the Siphon recorder here – https://en.wikipedia.org/wiki/Syphon_recorder

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GB Apsley

We have been dealing in antique scientific instruments for 20 years at fairs and on ebay. We now deal on Fleaglass on which sits our complete and ever changing stock of rare and unusual instruments. We also exhibit at the Scientific Instrument Fair run twice a year in London. Please do let us know if you're interested in items you don't see in our stock or if you are interested in selling items from your own collection.