Riefler escapement drawing

Autor:

Clemens Riefler

Credit:

Downloaded from German Exhibition, Group 21, Special Catalog of the Exhibition of Scientific Instruments, Columbian Exposition, Chicago, 1893, p.63 on Google Books. The drawing came originally from the firm that manufactured it, Clemens Riefler

Krótki link:

https://www.plwiki.pl/b/9d9f4

źródło:

Wikimedia Commons

Wymiary:

1303 x 784 Pixel (225485 Bytes)

Opis:

Drawing of Riefler escapement, invented by Sigmund Riefler in 1889, from the catalog of the Columbian Exposition, Chicago, 1893. It was used in the precision astronomical regulator clocks produced by the German firm Clemens Riefler from 1890 to 1965. The escapement's advantage was that it applied impulses to keep the pendulum swinging by flexing the suspension spring (i) that supported the pendulum, rather than applying force directly to the pendulum. The spring is attached to a metal support (A) that rocks back and forth on knife edges (c) resting on agate plates (P). Riefler clocks achieved an accuracy of 10 milliseconds per day, possibly the most accurate all-mechanical clocks ever made. Alterations to image: rotated image 90° CW, rotated R drawing a few degrees to justify, moved R drawing closer to L and aligned drawings vertically, converted to 32 color PNG.

Licencja:

Public domain

Komentarz do licencji:

Public domain in USA - published in USA prior to 1923