Electromechanical short interval timer

US4490051A · kind A · utility

Assignee

• Gebruder Junghans GmbH · DE

Inventors

• Hans Flaig · Schramberg, DE
• Egon Rapp · Ansbach, DE
• Herrmann Brede · Schiltach, DE
• Wolfgang Ganter · Schramberg, DE

Key dates

• Filing date: Nov 10, 1983
• Grant date: Dec 25, 1984
• Expiry date: Nov 10, 2003

Classification

• Technology area (CPC G): Physics
• CPC primary: G04F3/06
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electromechanical short interval timer has an actuating dial which can be manually rotated from a rest position to establish a time-elapse period. An electric motor returns the dial to its rest position. A timing circuit delivers electric pulses to drive the motor. A frequency selector switch is connected to or within the timing circuit whereby the pulse frequency can be varied. In this way, the time elapse period which is set by a given amount of dial rotation can be varied in a simplified manner. The dial activates a signal emitter before reaching its rest position, and simultaneously activates a timer circuit to continue returning the dial to its rest position. The dial engages a movable stop at both ends of its 360 degree travel stroke which assumes that the dial travels exactly 360 degrees.