Kymograph


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kymograph

[′kī·mə‚graf]
(industrial engineering)
A device used to measure extremely short work time intervals by using a system of transducers that are activated by an operator performing a job, with the impulses recorded as a function of time.
(medicine)
A device for recording internal body movements by making tracings with a stylus on a revolving smoked drum.

Kymograph

 

an instrument that graphs certain physiological processes, such as heartbeat, respiration, and muscle contractions.

A mechanical kymograph was used for the first time by the German physiologist K. Ludwig in 1847 to record changes in blood pressure. The apparatus consisted of a metal drum, covered with smoked paper and evenly rotated by a clock mechanism. A stylus attached to a rod and connected to the contracting heart, muscle, or other functioning organ describes a curve on the drum.

The speed of rotation of the kymograph is regulated by the movement of a friction clutch along the axis and depends on the dimensions of an air brake. Electrokymographs are used for investigations demanding greater accuracy. These kymographs ensure a constant but easily regulated speed of movement. The driving drum of the electrokymograph is set in motion by an electric motor.

I. N. D’IAKONOVA

References in periodicals archive ?
(b) Visualization of mitochondria by Mito-dsRED2 transfection (upper image) and kymograph images for mitochondria movement (middle and lower four images).
Detailing experiments conducted using a Zimmermann kymograph, she confidently announces that "the foot is a fact." Curiously out of step, so the speak, with most other acoustical prosodists of her day, Snell found in technology a defense of traditional foot-based versification: the only truly "scientific method of scansion," she observes, "is one which uses the symbols conventionally used for indicating quantity and which also uses stress marks." (58) Conventional wisdom, it would seem, dies hard.
(59) Thus Borell describes how the kymograph allowed physiologists "to monitor a wide range of physiological events." Undoubtedly, it served a similar function for psychologists intent on "monitoring" metrical "events." See "Training the Senses, Training the Mind," p.
(61) The word kymograph literally means "wave-writer."
37-51)--psychologists utilizing familiar and modified physiological instruments such as tuning forks (for "recording vibrations and marking time"), kymographs ("to record any process whose course is a function of time elapsed"), chronographs (used for measuring reaction-time in relation to sense impressions), phonautographs (for making graphic recordings and taking measurements of speech), and other apparatus could accurately "photograph," as one psychologist put it, a range of putatively "transient phenomena" (Cattell, pp.
Tenders are invited for Kymograph (Students) Electric Independent Unit
Tenders are invited for Electrodes, X-Blocks, Barrette Clamps, Enamel Bowls Brass Uprights, With Coarse And Fine Adjustments Basin, Spirit Lamps, Cooper Wire (Double Cotton Covered) Kymograph Paper Etc
Tenders are invited for Purchase of kymograph and drum
1) name of work: purchase of kymograph and drum as per specifications
I am sure you recognize at least one of the following: chalk, slide rule, kymographs, camera lucida, or opaque projector.