Records battus !

La Hamilton Railway special…

c’est quoi cet OVNI ??

jamais vu cet échappement, on dirait une détente, pas de balancier et roue d’échappement digne des dernières réalisation du Baselworld…

help Jojo et les autres ! je meurs d’impatience de savoir de quoi il s’agit

Xaipe a écrit:

La Hamilton Railway special…

c’est quoi cet OVNI ??

jamais vu cet échappement, on dirait une détente, pas de balancier et roue d’échappement digne des dernières réalisation du Baselworld…

help Jojo et les autres ! je meurs d’impatience de savoir de quoi il s’agit

The Clifford Magnetic Escapement
Invented by Cecil F. Clifford, BSC, FBHI, in 1938 and was experimented upon during World War II with the aim of producing a silent time bomb for naval use. The theory being that as the escapement does not “tick” it would be undetected by sonar. The escapement consists of a flat pierced sinusoidal escape-wheel made of a magnetisable material called “Mumetal” mounted horizontally, and a flat upright “detent” terminating in two prongs allowing the escape wheel teeth to pass through. After the war, Clifford approached various firms with the idea of using the silent escapement in clocks and watches. He eventually joined the company of Horstmann Gear Ltd, a maker of mechanical clocks and the company became Horstmann Clifford Magnetics Ltd in 1948, in order to produce clocks and watches with magnetic escapements. The company never actually went into production with magnetic escapements but instead approached various companies to take out production licenses. The Hamilton Watch Company was approached and sent two watches over to England for the escapement to be fitted, the present watch is one of these pieces. Although it was reported that the watches performed well, Hamilton did not take out a manufacturing license and in fact nor did any other company. HCM achieved great success after 1952 with electronic clocks and watches with “tuning fork” mechanisms and in fact all tuning fork clocks made in the 1960’s had magnetic escapements similar to the Hamilton prototype and linked to an electronically operated transistorized mechanism. With the advent of quartz technology, the escapement became obsolete by 1970.

Amicalement

Le lien:
http://66.249.93.104/search?q=cache:IzZXgwWo6uEJ:catalog.antiquorum.com/catalog.html%3Faction%3Dload%26lotid%3D401%26auctionid%3D108+hamilton+railway+sp%C3%A9cial+detent&hl=fr&gl=fr&ct=clnk&cd=1&lr=lang_en|lang_fr|lang_it]

jojo a écrit:

Merci à Van je sèchais lamentablement mais apparemment ça n’a pas fait fureur.
jojo

Normal, pas de tic tac, de bzzzzz, de biiip, de drrriiing…
De quoi finir neurasthénique avec ça dans un bateau!

Ceci dit, je vois pas très bien comment ça marche.

Amitiés.

steyr a écrit:

Van a écrit:

Ceci dit, je vois pas très bien comment ça marche.

Nan, moi non plus… la description est assez sommaire…

Christian

Gros plan sur le bouzin:

A+

Ce serait l’attraction/répulsion qui provoquerait l’oscillation nécéssaire à l’échappement…?

Lorsqu’on a pour pseudo « van », on reste discret question échappement…