Watch cogs. Internal cogs and gears of a watch escapement. The red circles are ruby jewels used in bearings. An escapement is a device within a watch which provides periodic impulses to the balance wheel that helps to regulate time keeping. Jewels,whether natural or man-made,are used in watch bearings because their smooth surfaces offer little friction resistance and are hard-wearing. Photograph of a 17-jewel Roamer watch from Switzerland | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Parker, David |
Bildgröße: | 2809 px × 3543 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |