Monitoring system for a steering wheel mounted air bag gas source

US3947057A · kind A · utility

Assignee

• Daimler-Benz AG · DE

Inventors

• Gerhard Schiesterl
• Helmut Wulf · Esslingen am Neckar, DE

Key dates

• Filing date: Jun 6, 1974
• Grant date: Mar 30, 1976
• Expiry date: Jun 6, 1994

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B60R21/268
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A system for warning when the liquid level of a air bag gas source as dropped to a predetermined level, such that the gas source would not be adequate to properly inflate the bag upon actuation. The source is mounted to rotate with a steering wheel. An electrically conductive float floats in the liquid such that it always remains at the upper portion of the source. The float comes into contact with contacts in the gas source, when the liquid level drops to the predetermined level, to complete an electric circuit to a signaling device and/or a drive disabling device.