Mannesmann Vdo Ag

Helmut Olbrich

Heinrich Noll

Stephan Zech

Hans Kolibius

Frank Jansa

Michael Vogel

In a pointer-type instrument ( ) having a pointer with a pointer shaft ( ) that deflects a pointer vane ( ), power is supplied to a light source ( ), which is connected to the pointer for rotation in common, by a flexible, spiral film ( ) provided with conductor tracks ( ). For this purpose, the pointer shaft ( ) has an enlargement ( ), which supports the film ( ) and secures it against sliding off axially. As a result, the film ( ) can be made particularly thin, thereby making it possible to reduce the driving torque required to deflect the pointer shaft ( ).

Pointer instrument

An indicating instrument has a pointer ( ) driven by a measuring mechanism by a pointer spindle ( ). The pointer has a region ( ) on the pointer hub side which in cross section has the form of an H. This H is formed by a horizontal bar ( ) and two outer bars ( ). Ribs ( ) extending in zigzag form above and below the horizontal bar ( ) increase the rigidity of the region ( ) on the pointer hub side.

Display instrument

A pointer instrument having a connecting sleeve ( ) which holds an essentially transparent pointer ( ), and an illuminating means ( ) that radiates directly into a f lag ( ) of the pointer ( ) the connecting sleeve ( ) having conductors ( ), ) and contact surfaces ( ) of conductive plastic. At its end facing away from the pointer ( ), the connecting sleeve ( ) has connecting contacts ( ) for making contact with a power supply of a circuit board ( ).

A pointer instrument having a connecting sleeve (,) which holds an essentially transparent pointer (,), and an illuminating means (,) that radiates directly into a flag (,) of the pointer (,), the connecting sleeve (,) having conductors (,),,) and contact surfaces (,) of conductive plastic. At its end facing away from the pointer (,), the connecting sleeve (,) has connecting contacts (,) for making contact with a power supply of a circuit board (,).

In order to code its light intensity class, a light-emitting diode (,) has a number of contact elements (,) which are connected to series resistors (,) situated outside a physical unit comprising the contact elements (,), a connection element (,) and the light-emitting diode (,). Depending on the code, series resistors (,) are combined and thus compensate for the fluctuations in light intensity which are unavoidable in light-emitting diode manufacture. The light-emitting diode (,) is therefore automatically connected to the requisite series resistor (,) by connecting the connection element (,).

Growing community of inventors

Darmstadt, Germany

Helmut Olbrich