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A 'Heath-Robinson-like' device
invented by Dudgeon in 1882 which records
and measures the heart rate by transmitting movement from the radial
pulse onto a paper trace. A sensitive manometer sits on the
radial artery and the resulting tiny movements are amplified through
to a needle by
means of a weighted pulley. A clockwork mechanism
turns a roller which winds recording paper under the needle to
record a trace. The instrument is unsigned. The mechanism and lined
case are in mint condition and perfect working order and from
appearances may never have been used. This is one of the cleanest
examples I have seen and probably dates to the early 20th century
although they were of the moment in the late 1800s. Box dimensions:
88 x 68 x 55 mm. |
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