4. Electric heating
  5. Metal heating
  6. Of cylinders

Helmut Welker

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High precision incremental distance measuring system

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Length measuring device

Geometrical instruments – Distance measuring – Scale reading position sensor
Reexamination Certificate

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Measuring apparatus using the moire fringe concept of measuremen

Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent

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Measuring apparatus using the moire fringe concept of measuremen

Optics: measuring and testing – Refraction testing – Prism engaging specimen
Patent

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Measuring scale casing and mounting spar

Supports: cabinet structure – Mounted on wall – ceiling or spaced panels
Patent

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Profile ID: LFUS-PAI-P-733702

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