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AssigneeAlexander Wiegand GmbH & Co. Armaturen- und Manometerfabrik
InventorsHelmut Berninger, Hans Klein, Werner Muller, Thomas Neugebauer, Kurt Neubeck
Estimating the term…
A method of making a tube spring manometer measurement system is disclosed. The system, comprising a tube spring, display assembly and at least one operating member which actuates said display assembly, e.g. a tie rod, is mounted and assembled to form a functional assembly. A predetermined reference pressure is then applied to the tube spring. The deflection of the display assembly caused by said reference pressure is compared to a theoretical deflection. If the difference between a theoretical deflection associated with said reference pressure and the observed actual deflection is excessive, local heat is supplied by means of a laser beam to at least one operating member and/or said tube spring, thereby removing material and/or altering the internal tension thereof. These changes are utilized to influence the range and/or zero baseline of the instrument. Heat is supplied without force or contact, so that the effect of the heat can be monitored directly and discontinued at exactly the moment the desired display accuracy is attained.
A process for producing a tube spring manometer measurement system comprising a tube spring which serves as a measuring element, a display assembly and at least one operating member which deflects said display assembly responsive to pressure applied to said tube spring, the free end of said tube spring, said display assembly and said operating member being connected together to form a functional measurement system, said process comprising the steps of subjecting the tube spring to a predetermined referecne pressure, comparing the deflection of said display assembly to a theoretical deflection corresponding to said reference pressure, and applying heat locally in metered quantities by means of a laser beam to at least one of said operating member and said tube spring until the deflection of said display assembly substantially approaches the theoretical deflection associated with said reference pressure.
Dependencies are inferred from the claim text.