Balancier "trident"

De retour de mon stage chez Fly back, j'ai maintenant tout loisir de vous présenter le travail et les détails intéressants de ce stage.

Je vais commencer par vous présenter une découverte intéressante et pour le moins inhabituelle, faite par hazard dans le stock au cours d'une recherche de spiral. Dans une boite au fond de la layette, je découvre ça:

Forme étrange s'il en est pour un balancier! On peut peut se demander si cette forme à un intérêt autre qu'esthétique. Et c'est là que se révèle tout l'intérêt d'une solide documentation et d'une bonne mémoire visuelle Fier 2

. En effet, je me souviens d'avoir déjà rencontré cette forme de balancier dans un de mes grimoires study

. De retour chez moi, je me replonge donc dans "La Montre, les échappements, le spiral, la compensation" et je retrouve rapidement ceci:

C'est donc le passage du carré de remontage de la fusée entre les rais du balancier qui impose cette forme en "trident". Et d'après le document ci-dessus, il ne nous reste pas de spécimen de telles montres, mais seulement une description. Notre ami Fly serait donc en possession d'un exemplaire unique! Sans doute attribuable à Barrow (il semble peu probable qu'une construction aussi sungulière ait été reprise) et datant donc d'une période comprise entre 1675 (introduction du spiral par Huygens) et 1699 (mort de Barrow). Il est à déplorer qu'une telle montre ait été détruite à une époque où l'histoire de l'horlogerie et les montres anciennes n'étaient pas considérés à leur juste valeur. Seul le balancier à été conservé à titre sans doute de "curiosité". On peut ajouter qu'une telle promiscuité entre le balancier et le carré de remontage est de nature à mettre en péril les pivots de balancier à chaque remontage...

La seule photo de montre comportant un carré de remontage entre les bras du balancier que j'ai trouvée est celle de cette horloge-tambour de Beauvais à Paris datée de 1545 environ:

Il s'agit d'une montre antérieure de plus d'un siècle à celle de Barrow et les bras du balancier sont rectilignes. Il est à noter que non-seulement le carré de remontage est entre les bras du balancier, mais aussi le pied du coq Shocked

!!
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Serius est quam cogitas

Plein de trésors chez Flyback !

J'ai trouvé ceci sur ton Barrow :

Barrow, Nathaniel of London

Nathaniel Barrow was born about 1639. He started his apprenticeship in about 1653/4 with Nicholas Payne who then handed his apprenticeship over to Job Betts. Nathaniel received his freedom (finished his apprenticeship) in 1660. In 1668 Nathaniel took on a Bondsman, Seabounrne, who went to work as a journeyman. It would seem that John Leighton made movements for Nathaniel as in 1679, Nathaniel gave John a loan to pay his Clockmaker's Company quarterage fees and the loan was to be repaid by deducting a sum from the price of each movement John made for him.

On the 13 January 1688 Claudius Bertin was charged with shoplifting from Nathaniel Barrow. The summary of the trial (found on the web at http://www.oldbaileyonline.org/html_sessions/T16880113.html ) is:-

Claudius Bertin, theft : shoplifting.

The Proceedings of the Old Bailey Ref: t16880113-2
Trial Summary:
Crime(s): theft : shoplifting,
Punishment Type: branding,
(Punishment details may be provided at the end of the trial.)
Verdict: Guilty,
Other trials on 13 Jan 1688
Name search for: Claudius Bertin,
Crime Location: St. Michaels Cornhill

Original Text:
Claudius Bertin , a French Man, was Indicted for stealing on the 2d. of December last, in St. Michaels Cornhill, one Pendulum Gold Clock Watch, value 30 l. the Goods and Chattels of Nathaniel Barrow ; and one plain Gold Clock Watch, value 10 l. the Goods and Chattels of John Cooper . It appeared he came into the Shop of the said Mr. Barrow in a Scarlet Cloak, pretending to cheapen Watches, and telling Mr. Barrow he could not speak English, pointed to him to take a Pen and Write, and while he was Writing, he Robb'd him of the Watches. He had little to say for himself, but only spoke by his Interpreter, that he bought them at the Italian Coffee-house: But not being able to produce the Person that bought them, nor any other in his Vindication, he was brought in guilty of Felony.

Nathaniel played a large role in the Worshipful Company of Clockmakers. He became an assistant in 1676, a Warden in 1685 and then he was made Master of the Company in 1689. By 1698 his health was obviously declining as he was excused from regular attendance of the meetings. Nathaniel died about 1700.

Nathaniel is known to have taken on several apprentices including:-

Thomas Smith, started November 1664

Daniel Finch, started April 1667 (did not finish his apprenticeship)

John Finch, started October 1668, finished 1675/6

Henry Hammond, started September 1672, finished July 1680

Thomas Bates, started August 1677, finished November 1684

John Frearson, started October 1680, finished August 1689

William Weedon, started October 1686, finished July 1695

Known Published Photos or articles

None

Known Trade Directory listings from trade directories that we have currently catalogued

None Found.</TABLE>
Note: Due to the dynamic nature of the addition of Trade Directories to our library, these results may show additional dates to the text above.

Sources (see Links page for details of places to obtain copies of the sources listed below)

Brian Loomes, The Early Clockmakers of Great Britain, Pub Nag Press 1981 ISBN 7198 0200 8
Cecil Clutton, G H B Britten’s Old Clocks & Watches And Their Makers 9th Edition, Pub Bloomsbury Books 1989 ISBN 0 906223 69 5
G H Baillie, Watchmakers And Clockmakers Of The World 3rd Edition, Pub Nag Press 1982 ISBN 7198 0040 4

http://www.oldbaileyonline.org/html_sessions/T16880113.html

Photos

<td>

These photographs are reproduced here with the kind permission of Northern Clocks (http://www.northernclocks.co.uk/)

c1690

A very rare and early three train longcase clock playing bells of st. Clements on the ¼`s.

The hood with flat top above a blind fret. The square glazed door flanked by giltwood capped barley twist pillars. The long square topped trunk door beneath the convex moulded throat has a glass lenticle. The base is cross banded and sits on 4 small bun feet.
The square eight day 4 pillar movement strikes the hour on a bell and the ¼`s on 5 bells playing “the bells of St. Clements.” The 10 ½in dial has a raised chapter ring with roman and Arabic numerals and cherub head spandrels. The matted centre has 3 winding holes, seconds dial and finely modelled hands. Signed at the base Nathaniel Barrow Londini fecit.
(photo ref:57)

C'est peut-être cette montre qui avait été chouravée ?
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Un bon chien vaut mieux que deux kilos de rats.

le plus facile reste de compléter "la montre"........belle recherche Saturne
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Ici : pour rire et apprendre; plaire et aussi déplaire...peu importe
Le temps n'est jamais perdu... s'il est donné aux autres.

Achete: couronnes et verres pour LIP R27 ;