Driving recorder

Application Number: 00102673
Application Date: 2000.02.25
Publication Number: 1266982
Publication Date: 2000.09.20
Priority Information: 1999/2/25 DE 29903345.7
International: G01D15/24;G01P1/07;G07C5/12
Applicant(s) Name: Mannesmann VDO AG
Inventor(s) Name: Clauss Shew
Patent Agency Code: 11038
Patent Agent: sun zheng
Abstract A tachograph has an electronic clock and a drive unit for time-dependent drive of tachograph chart discs which serve as recording media. A servomotor engages directly with a toothed wheel of the drive unit by means of a pinion fixed to the motor shaft. A pulse generator is formed by a toothed wheel of the drive unit provided with slits and a light barrier. A further slit is provided in a further toothed wheel 30 which is in engagement with the tachograph disc receiver. The slit, in conjunction with a light barrier, delivers a signal denoting the zero hours position of the tachograph disc receiver.