Tachometer for motor vehicles

摘要

The tachometer is built into an opening in the vehicle dashboard or similar vehicle wall. This has an essentially cylindrical housing for a writing instrument. It also has a cover (2) which is hinged at the front and can be locked to the housing with a lock. The cover enables diagram plates for recording information to be exchanged. The tachometer (1) also has an indicator to display the speed and it also has a distance counter. The mechanism for measuring speed, the mechanism for driving the indicator (16) and the distance counter (7) are arranged in the cylindrical housing. A clock face (15) is associated with the indicator. Speed values are scaled on the clock face. The locating openings in the front housing section are connected to adjustment rods with actuating knobs. An aperture (11) is associated with the lock. This is applied when the tachometer is installed in the vehicle and the adjustment of the pulse counter/distance unit with the cover open, is carried out and the cover is then closed.