C.1901 Cardiac Pulse Recorder Sphygmo-chronograph

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C.1901 Cardiac Pulse Recorder Sphygmo-chronograph

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Invented by a Swiss Pharmacologist that inherited his fathers watch factory Jules Alfred Jaquet turned the watch company into a scientific instruments manufacturer. This device, the Sphygmo-chronograph, was a precursor to the polygraph machine. The pulse recorder consists of a complex machine that is worn on a leather wrist strap. The dials respond to pressure on the artery and when activated the mechanism rolls the smoked paper scroll and the stylus records the pulse intervals. 

This device comes in its original box with the leather strap and machine. The bottom roller advances with winding and activating the switch. This is as far as I have gotten on it but it has been well stored for over a 100 years -- the plating and craft is beautiful. Serial numbers correspond to the strap, machine, and box. Makers mark is visible on the side plate. Slight wear on the leather strap threads but considering its age it is pretty minor.

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