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[HORLOGERIE], BREGUET, Brevet du Tourbillon et de l'Echappement à force constant

Photo BREGUET, Abraham Louis. 

BREGUET, Abraham Louis. 

Brevets d'inventions du régulateur à tourbillon et de l'échappement à force constante. 

s.l., s.n., [1844].

Two 4to (254x204 mm), [5-10] pages and1 plate / [193-200] pages and 1 plate.  binding : Unbound booklets. 

Photo BREGUET, Abraham Louis. 

Extracts from the patents published in the encyclopedia "Description of machines and processes specified in the patents of invention" (1844) of the two main patents of invention of Abraham Breguet.
The tourbillon regulator and the constant-force escapement are the two most complex horological complications ever invented and still in use today in luxury watchmaking.

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Photo BREGUET, Abraham Louis. 
Photo BREGUET, Abraham Louis. 
Photo BREGUET, Abraham Louis. 
Photo BREGUET, Abraham Louis. 
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