Switch for energizing an electric motor of a wiper system

US4857815A · kind A · utility

Assignee

• SWE Auto-Electric GmbH · DE

Inventors

• Herbert Erdelitsch · Bietigheim-Bissingen, DE
• Otto Machalitzky · Bietigheim-Bissingen, DE
• Josef-Elmar Prang · Bietigheim-Bissingen, DE

Key dates

• Filing date: Apr 11, 1988
• Grant date: Aug 15, 1989
• Expiry date: Apr 11, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01H9/40
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

This invention relates to a switch for energizing an electric motor of a wiper system from a voltage source, which motor has a switching member to be changed over in several modes of continuous operation as well as in a mode of intermittment operation. The switching member has two bridging contacts of which the first one co-operates with stationary contacts on a first contact path and the second one with stationary contacts on a second contact path. Thereby in at least one switching position a further mode of operation of the wiper system may be switched on via the second bridging contact and the stationary contacts of the associated second contact path in addition to intermittent operation. The switch has thus a high operational reliability, because there is little risk for a simultaneous failure of a stationary contact associated to the same mode of operation on both contact paths.