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    Description

    A Von Frey Style Sphygmograph in Original Box Manufactured by Wilhelm Petzold, Leipzig, Germany, circa 1895
    Marks: WILH. PETZOLD, LEIPZIG
    3 x 6-7/8 x 4-1/4 inches (7.6 x 17.5 x 10.8 cm) (box)

    This small machine in the simple wood box actually represents a huge part of medical history. The unit is a Von Frey style sphygmograph in functional condition. This antique medical device was the precursor to the modern EKG machine and performed a similar analysis and reading. The first use of this type of machine dates to 1891, making it one of the earliest examples of biomedical instruments. The sphygmograph was used to record "radial artery pulsations" on a cylindrical drum - heart pulses could be recorded as an output display. The mechanics of the machine are based around a "ball and shaft" system that drives a stylus that records pulses.


    Condition Report*: Top of box lid disconnected from sides, straps worn and frayed, and general surface scratches and abrasions to metal components consistent with age and indicative of use. Apparent functional condition, but Heritage Auctions does not guarantee the completeness or working order of mechanisms.
    *Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    September, 2018
    21st-23rd Friday-Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 356

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