Blood pressure measuring

• US 3,229,685 A
• Filed: 04/19/1963
• Issued: 01/18/1966
• Est. Priority Date: 04/19/1963
• Status: Expired due to Term

• Current Assignee: Donald L. Ringkamp, John R. Thompson, Thomas H. Jacobi
• Original Assignee: Donald L. Ringkamp, John R. Thompson, Thomas H. Jacobi
• Inventors: Ringkamp, Donald L., Thompson, John R., Jacobi, Thomas H.
• Application Number:
  US04/274,135
• Time in Patent Office: 1,005 Days
• US Class Current: 600/480
• CPC Class Codes: A61B 5/02255 the pressure being controlled by plethysmographic signals, e.g. derived from optical sensors
• CPC Class Codes: A61B 5/02422 within occluders

Claims

1. A BLOOD PRESSURE MEASURING DEVICE COMPRISING A LIGHT SOURCE, A LIGHT SENSITIVE RESISTOR POSITIONED TO RECEIVE LIGHT FROM SAID SOURCE, LIGHT PERMEABLE ASTRINGENT MEANS LOCATED BETWEEN SAID LIGHT SOURCE AND SAID LIGHT SENSITIVE RESISTOR AND ADAPTED TO RECEIVE AND ENCOMPASS A HUMAN MEMBER AND TO POSITION A MEMBER SO RECEIVED BETWEEN SAID LIGHT SOURCE AND SAID LIGHT SENSITIVE RESISTOR, MEANS FOR SELECTIVELY VARYING THE ASTRINGENCY OF SAID ASTRINGENT MEANS, AND MEANS, ELECTRICALLY CONNECTED TO SAID LIGHT SENSITIVE RESISTOR, FOR CONVERTING TO INTELLIGIBLE FORM CHANGE IN INTENSITY OF LIGHT REACHING SAID LIGHT SENSITIVE RESISTOR FROM SAID SOURCE, THROUGH SAID ASTRINGENT MEANS AND MEMBER, WITH VARIATIONS IN ASTRINGENCY OF SAID ASTRINGENT MEANS.