System for controlling the striking mechanism of a timepiece

US4148181A · kind A · utility

Assignee

• Kieninger & Obergfell Fabrik fur Technische Laufwerke und Apparate

Inventor

• Erich Scheer · St. Georgen, DE

Key dates

• Filing date: May 11, 1977
• Grant date: Apr 10, 1979
• Expiry date: May 11, 1997

Classification

• Technology area (CPC G): Physics
• CPC primary: G04G13/00
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A first contact arm on the minute shaft of a clockwork switches, once every 0 minutes, the mode of energization of an electronic gating circuit with two sections in the inputs of an inverting anticoincidence (NOXOR) gate working into a setting input of a flip-flop which controls the driving circuit of a striking mechanism, each section having two parallel branches of relatively inverting character and with a relative phase delay whereby any switchover results in a brief de-energization of that setting input and thus in a setting of the flip-flop. A pulse generator, included in or energized by the driving circuit, works into a stepping input of a binary pulse counter provided with four output leads whose pattern of energization represents the numerical values from 1 through 12. A logic network, connected to a resetting input of the flip-flop and to a clearing input of the pulse counter, discriminates between switch-overs at the full hour and at the half-hour in response to the state of energization of the gating circuit; on the half-hour, the flip-flop is reset and the pulse counter is cleared upon the energization of the No. 1 output lead of the counter, whereas on the full hour th…