Central locking system for lockable entries of buildings or vehicles, particularly motor vehicles

US4424548A · kind A · utility

Assignee

• Fichtel & Sachs · DE

Inventors

• Rainer Fey · Schweinfurt, DE
• Gerhard Dumbser · Bitburg, DE
• Arthur Laun · Gochsheim, DE

Key dates

• Filing date: Jul 23, 1981
• Grant date: Jan 3, 1984
• Expiry date: Jul 23, 2001

Classification

• Technology area (CPC E): Fixed Constructions
• CPC primary: E05B77/48
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A central locking system particularly suitable for use in a motor vehicle to lock or open, at one time, all the vehicle doors from any one of a number of locations, includes at least one lock bolt mechanism which provides movement in a selected one of a locking and a release direction to locking elements at the vehicle doors. At least one control switch which may be located at the door on the driver's side of the vehicle is selectively actuable to one of first and second switch positions, and is arranged together with a pulse drive circuit including a capacitor to provide a first drive pulse to the lock bolt mechanism when the control switch is in the first switch position. The first drive pulse causes the lock bolt mechanism to move the locking elements at the vehicle doors in one of the locking and release directions, and is produced by the capacitor in response to a charging current supplied to the capacitor by a charging current circuit. When the control switch is in the second position, a discharging current circuit is coupled to the capacitor and directs a discharging current from the capacitor. This allows the capacitor to provide a second drive pulse to the lock bolt mechan…