System for charging the battery of watches without opening the lid

摘要

The battery (4) is never removed from its location. The battery is charged through the difference of voltage maintained by means of an external source. The two poles of the source may be connected to the watch (1) through a plug if the lid of the watch is connected to the earth of its circuit, and through two plugs if the lid is isolated, or by a method of connection without penetration. The orifices (7) for inserting the plugs may be provided with appropriate isolators. In the case of two plugs, and in order to avoid an erroneous connection, the plugs may have different and incompatible shapes. Application to watches and apparatuses which are battery-operated.