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Breathing apparatus with a display unit

  • US 5,601,078 A
  • Filed: 05/22/1995
  • Issued: 02/11/1997
  • Est. Priority Date: 07/16/1994
  • Status: Expired due to Fees
First Claim
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1. A breathing apparatus with a display unit for the transmission of measured data via a display field of the display unit into a field of vision of the person wearing the breathing apparatus, comprising:

  • a breathing mask with mask body;

    an LC display forming said display field, said LC display being viewable from within the mask body, said LC display being transparent at least for transmission radiation, said breathing mask having a face shield, a tube being provided between said LC display and said face shield, whereby the transmission radiation emerging from the LC display is directed at least piece-wise through said tube to said face shield, a sealing element being provided between said tube and said face shield;

    an optical concentrator, including means disposed outside said mask body for collecting ambient light via a light entering surface and including means for emitting collected light via a light exiting surface toward said LC display, said optical concentrator being provided as said transmission radiation source for said LC display;

    an additional light source positioned for irradiating said LC display; and

    a photoelectric sensor positioned for detecting ambient light intensity, said photoelectric sensor being actively connected to said additional light source for controlling a light intensity of said additional light source as a function of the ambient light intensity.

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