Geometrical instruments – Miscellaneous – Light direction
Patent
1983-04-15
1985-11-05
Cohen, Lee S.
Geometrical instruments
Miscellaneous
Light direction
33 1C, 128702, 128706, A61B 504, G01B 302
Patent
active
045505020
ABSTRACT:
A gauge which facilitates the analysis of a recorded electrocardiogram which comprises a flat sheet of transparent material having a plurality or fan of straight diverging lines disposed on said sheet; a plurality of straight, parallel lines disposed on the sheet extending in a direction transverse to the diverging lines and perpendicular to a line extending medially between the outermost of said diverging lines, said diverging lines intersecting said parallel lines as to define equal increments along any parallel line; the transverse lines being spatially arranged such that they intersect with the diverging lines to form a grid therewith wherein the distance between adjacent points of intersection with the diverging lines on any of the parallel lines bear a relation to the heart beat rates or heart rate cycle interval of a periodic wave form recorded on an electrographic chart or strip; indicia means disposed on said sheet for designating the transverse parallel lines as graduations of a scale comprising intervals which correspond to said heart rate cycle intervals or heart beat rates; and the gauge being physically sized so that said diverging lines are laterally spaced apart to encompass at least two heart beat cycles of said periodic wave form.
REFERENCES:
patent: 846006 (1907-03-01), Bryson
patent: 1232290 (1917-07-01), Grunsberg
patent: 1876431 (1932-09-01), Page
patent: 2088533 (1937-07-01), Phelps
patent: 2501550 (1950-03-01), Tamagna et al.
patent: 3812586 (1974-05-01), Itokawa
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patent: 4030486 (1977-06-01), Eastman
patent: 4282655 (1981-08-01), Tinman
patent: 4388759 (1983-06-01), Orejola
Cohen Lee S.
Sykes Angela D.
Weingram Edward R.
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