Ionization fire detector

US5298223A · kind A · utility

Assignee

• Esser Sicherheitstechnik GmbH · DE

Inventors

• Horst Berger · Bielefeld, DE
• Michael Pastors · Neuss, DE
• Mario Pussin · Mönchengladbach, DE
• Heiner Politze · Neuss, DE
• Georg Pollmann · Willich, DE

Key dates

• Filing date: Aug 10, 1993
• Grant date: Mar 29, 1994
• Expiry date: Aug 10, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G08B17/113
• WIPO field: Control
• WIPO sector: Instruments

Abstract

An ionization fire detector of the type including a measuring chamber and a reference chamber having a common electrode which is connected to the gate terminal of a field-effect transistor by a profile piece of conductive caoutchouc having one end contacting the gate terminal and another end contacting the common electrode.