Wika Alexander Wiegand Gmbh & Co.

Kurt Klein

Helmut Berninger

Detlef Wahl

Burkard Meisenzahl

Bernd Friebe

Heiko Schliessmann

The measuring instrument for a pressure gauge comprises an indicator unit with two plates that bear rotatably an indicator shaft carrying a pinion and that furthermore bear a gear segment. The measuring instrument furthermore comprises a metal Bourdon tube bent into an arc shape, which is soldered on one end to a spring carrier and on the other to a spring end-piece. The spring end-piece is connected to the gear segment such that the displacement of the spring end-piece because of the measurement pressure is transferred to the gear segment. The spring end-piece constitutes a part that is rigidly attached to one of the two plates prior to the Bourdon tube being soldered to the spring end-piece and that is separated from this plate once the Bourdon tube has been soldered to the spring end-piece. During the course of the manufacture of this measuring instrument, the spring end-piece is produced as a part that is securely joined to the two plates. The Bourdon tube is soldered to the spring end-piece while the latter is still rigidly affixed to the plate. It is not until thereafter that the spring end-piece is separated form the plate. Preferably the spring carrier is integral to or attached to one of the two plates. The spring end-piece assumes its target position with greater accuracy with respect to the indicator unit.

Measuring instrument for a pressure gauge

The measuring instrument for a pressure gauge comprises an indicator unit (,) with two plates (,) that bear rotatably an indicator shaft (,) carrying a pinion (,) and that furthermore bear a gear segment (,). The measuring instrument furthermore comprises a metal Bourdon tube (,) bent into an arc shape, which is soldered on one end to a spring carrier (,) and on the other to a spring end-piece (,). The spring end-piece (,) is connected to the gear segment (,) such that the displacement of the spring end-piece (,) because of the measurement pressure is transferred to the gear segment (,). The spring end-piece (,) constitutes a part that is rigidly attached to one of the two plates (,) prior to the Bourdon tube (,) being soldered to the spring end-piece (,) and that is separated from this plate once the Bourdon tube (,) has been soldered to the spring end-piece (,). During the course of the manufacture of this measuring instrument, the spring end-piece (,) is produced as a part that is securely joined to the two plates (,). The Bourdon tube (,) is soldered to the spring end-piece (,) while the latter is still rigidly affixed to the plate. It is not until thereafter that the spring end-piece (,) is separated form the plate. Preferably the spring carrier (,) is integral to or attached to one of the two plates (,). The spring end-piece (,) assumes its target position with greater accuracy with respect to the indicator unit (,).

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Klingenberg, Germany

Kurt Klein