Spring-elastic measuring element comprising a flat...

Details Spring-elastic measuring element comprising a flat... Spring-elastic measuring element comprising a flat...

2007-02-27

2007-02-27

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Bourdon

Reexamination Certificate

active

10549556

ABSTRACT:
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.

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patent: 142 208 (1902-04-01), None
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