GB190811795A - Improvements in and relating to Watches. - Google Patents

Abstract

11,795. Robert, C. May 30. Watch cases; keyless mechanism. - In watches having winding and handsetting mechanism operable from a longitudinally sliding winding-stem through a twoarmed lever, especially in watches of the "calotte" type, the case a, Fig. 2, contains a foundation ring b to which is hinged the movement d. The movement is covered by a glass e carried by a ring f pivoted to the rim at g. The winding and setting mechanism comprises a spindle h, Fig. 1, on the lower part of which slides a clutch i provided with a groove l engaged by one branch m of a double-armed lever n pivoted at t. A spring q acting on the arm l keeps the clutch in engagement with the winding- pinion k. The upper end v of the spindle is square and fits in a square recess j in the winding- stem o. On this stem being pressed down from its normal position, its lower part p acts on a stop u on the second branch r of the lever n to engage the clutch i with the setting pinion x. When the stem o is pulled upwards, the end v of the spindle h is released from the recess allowing the movement d to be swung out of the casing.