Datei:Utzschneider, Liebherr u. Werner in München, circa 1820 (2).jpg

Utzschneider, Liebherr u. Werner in München, Höhe 2090 mm, circa 1820

Extrem seltene, frühe, astronomische deutsche Sekundenpendeluhr von außergewöhnlicher historischer Bedeutsamkeit für die Epoche der Präzisions-Zeitmessung in Süddeutschland. Insgesamt sind nur 10 dieser Sekundenpendeluhren bekannt, davon befinden sich 8 Exemplare in europäischen Museen.
Geh.: Profiliertes, schwarzes späteres (um 1880) Uhrengehäuse, gestuft, verglaste Fronttür, Seitenverglasung. Ziffbl.: Regulatorzifferblatt, versilbert, große Sekunde bei "12", arab. 24h-Anzeige bei "6", gebläute Breguet-Zeiger, signiert: "Utzschneider, Liebherr u. Werner in München". Werk: schmales, massives 4-Pfeiler-Messingwerk, Rechteckform, Gewichtsantrieb nach Huygens über vorne liegende Schnurrolle mit Gesperr, Graham-Hemmung, Rostkompensationspendel von Franz Joseph Mahler in einer Variante des Ellicottschen Kompensationspendels, mit schwerer Messing-Pendellinse an justierbarer Pendelfederaufhängung.

Utzschneider, Liebherr u. Werner in Munich, Height 2090 mm, circa 1810

An extremely rare, early German astronomical seconds pendulum clock of exceptional importance for the history of precision time keeping in Southern Germany. Only 10 of these seconds pendulum clocks are known; 8 of them are held by European museums.
Case: wooden case (later 1880), black, moulded, tiered, glazed front door and sides. Dial: silvered regulator dial with large seconds at "12", Arabic 24h indication at "6", blued Breguet hands, signed: "Utzschneider, Liebherr u. Werner in München". Movm.: slim, solid rectangular 4 pillar brass movement, Huygens weight driven mechanism via front pulley with lock, Graham escapement, gridiron pendulum created by Franz Joseph Mahler as a variation of the Ellicott compensation pendulum; heavy brass bob on adjustable suspension.

Joseph Liebherr (1767-1840).
Liebherr was the third son of Xaver Liebherr and was born in Immenstadt. He and his two younger brothers were trained by their father, who was a church clock maker and mechanic. Joseph went to Munich in 1801 and met Georg Friedrich von Reichenbach; they founded a mathematical institute together in 1802 (from 1804 on the Mathematical Physical Institute Reichenbach Utzschneider and Liebherr). Liebherr left the institute in 1812 and started his own business; in 1815 he had his own pendulum clocks for sale, his main interest, however, lay with the construction of mathematical instruments. In 1816 the Mechanical Workshop Utzschneider, Liebherr et Werner was founded; associates were amongst others Joseph von Fraunhofer, von Reichenbach and Franz Joseph Mahler (who later married Liebherr’s daughter Josepha). In 1817 Liebherr became a member of the Polytechnic Association. After the business closed down Liebherr moved to Kempten in 1823 but returned to Munich in 1827 to teach mechanics. He became a professor at the Polytechnic School where he upgraded instruments, constructed models and designed astronomical clocks.

Source: Wikipedia "Die freie Enzyklopädie" - "Joseph Liebherr", http://de.wikipedia.org/wiki/Joseph_Liebherr, as of 03/30/2012

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