Mechanical Music Digest 
You Are Not Logged In Login/Get New Account
Please Log In. Accounts are free!
Logged In users are granted additional features including a more current version of the Archives and a simplified process for submitting articles.
Home Archives Calendar Gallery Store Links Info
MMD > Pictures > havoSiren

Cagnard-Latour siren frequency counter
Siren Frequency Counter
Measures Organ Pipe Frequency
by Hans van Oost


havoSiren.jpg (23 kb)Having read the very interesting postings about frequency meters in 991217 MMDigest I could not resist posting a picture of a device that may have been the first frequency meter ever made.

It is a tiny instrument based on the principle of a siren.  It was designed in the 19th century by a Frenchman, Mr. Cagnard-Latour, and probably built by organ maker Claude Gavioli. The siren is equipped with two small indicator faces with hands, like a meter for measuring water or gas consumption.

The siren was tuned to a pipe by throttling the sirens wind supply, and when it sounded in tune with the pipe the frequency could be established by counting the speed with which the hands of the two indicators were turning around.

Primitive as it would seem, it was used by the famous French organ builder Cavaillé-Coll for his experiments. Afterwards it was returned to the Gaviolis, and now the little machine is part of the collection of the Utrecht museum "van Speelklok tot Pierement".

Hans van Oost
Kring van Draaiorgelvrienden, Netherlands
havo@kabelfoon.nl
Sat, 18 Dec 1999 21:48:13 +0100



19 December 1999
 

Home    Archives    Calendar    Gallery    Store    Links    Info   


Enter text below to search the MMD Website with Google
Loading



CONTACT FORM: Click HERE to write to the editor, or to post a message about Mechanical Musical Instruments to the MMD

Unless otherwise noted, all opinions are those of the individual authors and may not represent those of the editors. Compilation copyright 1995-2017 by Jody Kravitz.

Please read our Republication Policy before copying information from or creating links to this web site.

Click HERE to contact the webmaster regarding problems with the website.

Please support publication of the MMD by donating online

Pay via PayPal

No PayPal account required

                                                       
Translate This Page

. .