Abstract: An electronic wristwatch includes an electronic circuit such as a lead frame with extending conductive strips providing a first battery contact terminal and switch contact terminal for operating and setting the wristwatch. A multipurpose switch actuator makes continuous electrical contact between the wristwatch battery and the first contact terminal, and makes selective switching contact with the second contact terminal when actuated by a push-pull detented stem. The stem is removable when twisted using a tool so as to unseat the detent spring, so that it can be pulled from the watch frame, and is also reinsertable without disassembling the watch. The switch actuator serves various other functions, including spring biasing of the stem detent and holding the electronic circuit lead frame in the watch frame.

Abstract: A contact spring for making repetitive electrical contact with a contact pin on an oscillating balance wheel in a electro-mechanical watch. The contact spring is flat for maximum flexibility and has an end crimped to provide opposite identical rigid contact surfaces designed to control wear and provide self-cleaning action with optimum electrical contact.