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US 7,181,976 B2Granted
Spring-elastic measuring element comprising a flat connecting element that can be welded
AssigneeArmaturenbau GmbH
InventorOtto Radau
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AssigneeArmaturenbau GmbH
InventorOtto Radau
Estimating the term…
The invention relates to a spring-elastic measuring element (1) for thermometers, pressure switches or manometers consisting of an arc-shaped measuring tube (3), a base body (2) and a connecting element (10) for the measuring mechanism. The aim of the invention is to achieve the fully automated welding of the thermally influenced zone and to improve the latter. To achieve this, the connections between the measuring tube (3) and the base body (2) and the measuring tube and the connecting element (10) are obtained using connecting elements (11, 12) that can be welded. This allows the risk of contamination of the measuring system to be eliminated to a great extent and reduces the formation of corrosion and vibration cracks by the use of a small thermally influenced zone. A connecting element (11, 12) can also be produced as one-piece with the measuring tube (3) by expanding or creating a bead on the latter. The welded joint can be achieved by laser welding or electron-beam welding and the invention permits the welding of chrome-nickel steel to bronze.
A spring-elastic measuring element particularly for thermometers, pressure switches or manometers, comprising an arc- or screw-shaped measuring tube connected, particularly welded at one end to a base body, and at the other end joined with a connecting leg for the measuring mechanism, wherein the connection between the measuring tube and the base body and/or connecting leg is indirectly established by means of a weldable connecting element;
A method for producing a connection between a measuring tube and a base body and/or connecting leg, comprising the use of a weldable connecting element formed by widening and flanging of the measuring tube, or joined as an individual component with the measuring tube by a welding seam, for example a laser welding or electron beam welding seam, whereby the welding seam is produced extending through the connecting element up to the face areas of the measuring tube, and whereby the protruding marginal zone of the connecting element is joined with the base body or connecting leg by means of a second welding seam.
A spring-elastic measuring element particularly for thermometers, pressure switches or manometers, comprising an arc- or screw-shaped measuring tube connected, particularly welded at one end to a base body, and at the other end joined with a connecting leg for the measuring mechanism, wherein the connection between the measuring tube and the base body and/or connecting leg is indirectly established by means of a weldable connecting element;
A spring-elastic measuring element particularly for thermometers, pressure switches or manometers, comprising an arc- or screw-shaped measuring tube connected, particularly welded at one end to a base body, and at the other end joined with a connecting leg for the measuring mechanism, wherein the connection between the measuring tube and the base body and/or connecting leg is indirectly established by means of a weldable connecting element;
Dependencies are inferred from the claim text.