Pulse rate recorder

• US 4,009,708 A
• Filed: 05/29/1975
• Issued: 03/01/1977
• Est. Priority Date: 05/29/1975
• Status: Expired due to Term

• Current Assignee: John J. Fay Jr
• Original Assignee: John J. Fay Jr
• Inventors: Fay, John J. Jr.
• Primary Examiner(s): Grieb, William H.
• Application Number:
  US05/581,772
• Time in Patent Office: 642 Days
• Field of Search: 128/2.05 P, 128/2.05 E, 128/2.05 N, 128/2.05 Q, 128/2.05 R, 128/2.05 S, 128/2.05 T, 128/2.06 F
• US Class Current: 600/503
• CPC Class Codes: A61B 5/024 Detecting, measuring or recording pulse rate or heart rate A61B5/0205, A61B5/021 take precedence
• CPC Class Codes: A61B 5/02438 with portable devices, e.g. worn by the patient
• CPC Class Codes: G04D 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G04F 3/06 with electric driving mechanisms

Abstract

A pulse recorder self contained in a wristwatch type case includes a front face having a sweep second hand actuated by an electrical stop watch movement, and a three digit electronic display for the number of pulses counted during the time interval of motion of the second hand. A microphonic or pressure transducer is carried by the back face of the case so as to be pressed into contact with the wrist and is fed to a counter memory driving the display. An initial stop and an angularly moveable stop for the second hand set the time interval for which the hand is to move and provide electrical contacts for enabling the counter only when the hand is in motion.

Claims

1. A self contained circulatory pulse rate measuring and indicating device comprising:

a case;

means carried by said case for securing said case to the wrist of a wearer;

said case having a front face and a back face;

a pulse transducer carried on said back face for contact with said wrist;

a digital counter means within said case;

a digital display on said front face driven by said counter means;

a sweep second hand on said front face;

electric motor means within said casing for drivingly rotating said hand at a predetermined rate, first and second stops angularly disposed about said hand for engagement by said hand when said hand is in predetermined orientations;

said first stop being fixedly positioned at one angular position;

gear train means for angularly moving said second stop to an adjustable angular position;

said hand and said stops forming a portion of a switch means for electrically energizing said motor means and for coupling said transducer means for indexing said counter only when said hand is positioned between said stops.

2. The device of claim 1 wherein said switch means further comprises a normally closed relay having a first contact in series with said motor means and a second contact between said transducer and said counter;

said relay having a coil which is energized in response to said hand engaging either of said stops; and

further comprising a normally open momentary manual switch bridging said first contact for initiating the movement of said hand.