18th Jan, 2023 11:30
Scientific Instruments, Optical Toys & Photographica including an Important London Collection
A Dudgeon Type Sphygmograph/Pulseometer, English, Circa 1880-1920s
A Dudgeon Type Sphygmograph/Pulseometer, English, Circa 1880-1920s. A metal plated with fabric strap, pulse recording instrument, designed by Robert Ellis Dudgeon in the 1860s, this example manufactured by Wood & Co York. A small clockwork mechanism within the instrument drives a smoked paper strip across a plate. With the instrument strapped to the wrist, the pulse causes a needle to oscillate and mark the paper for each pulse beat, measures 8 x 7 x 12 cm overall. together Down Bros Arterial Clamp with wooden handle
Provenance: London Private Collection
Sold for £212
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