Pulse control for an electric clock

US4254491A · kind A · utility

Assignee

• Quarz-Zeit AG · DE

Inventors

• Martin Haub · Winchester, US
• Manfred Stein · Eschborn, DE

Key dates

• Filing date: Oct 31, 1978
• Grant date: Mar 3, 1981
• Expiry date: Oct 31, 1998

Classification

• Technology area (CPC G): Physics
• CPC primary: G04C3/143
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Electric clock with an oscillator, particularly a quartz oscillator, a frequency divider connected to the quartz oscillator and a control stage connected following the frequency divider, via which control stage a stepping motor, which stepping motor is coupled with the dial train, is able to be applied with pulses of the same or alternating polarity. Each pulse is formed from a number of individual pulses, the pulse duty cycle of the individual pulses reducing toward the end of the first mentioned pulses.