Pantographe Perfectionné Par L. BLONDEAU (0764)
Info
Pantograph made from wooden beams with brass joints. Special to the "Pantograph Perfectionné" is that the fixed point (the weight with the small needle points) is outside the drawing zone. As such eliminating possible damage to the drawing paper.
According to the label on the inside of the box, the pantograph could be bought either with the wooden joints or with the brass brass (the latter a surplus of 5 francs). Also the wood of the legs could be selected: "bois noir" (this object) or ebony (at a surplus).
References/Links/More Info
Google Books - Brevet du 10 mai 1840
National Museum of American History - Pantograph by Molteni
National Museum of American History - Pamphlet
Smithsonian - Wooden Pantograph by Molteni and Blondeau