Previous to this invention such pressure adjustment has been accomplished by varying the position of a spring-mounted galvanometer to which the stylus is attached and which is used to produce the stylus deflection. It becomes necessary to adjust the pressure of the stylus tip on the recording paper in accordance with the type of paper and stylus used to obtain a recorded line of a particularly desired firmness or width. In cardiographs or similar recording devices, the stylus used to generate the recorded lines on recording paper accomplishes said recording by means of a scraping action on the papers coating material due to pressure and by means of heat whereby the stylus is heated externally. G01D15/10- Heated recording elements acting on heatsensitive layers.G01D15/00- Component parts of recorders for measuring arrangements not specially adapted for a specific variable.G01D- MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS TARIFF METERING APPARATUS MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR.XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2.229910052782 aluminium Inorganic materials 0.000 description 2.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by CARDIOTRON ELECTRO MEDICAL LAB filed Critical CARDIOTRON ELECTRO MEDICAL LAB Priority to US706783A priority Critical patent/US2955895A/en Application granted granted Critical Publication of US2955895A publication Critical patent/US2955895A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links Original Assignee CARDIOTRON ELECTRO MEDICAL LAB Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)ĬARDIOTRON ELECTRO MEDICAL LABORATORIES Inc Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US706783A Inventor Ned W Buoymaster Duane B Haagensen Current Assignee (The listed assignees may be inaccurate. Google Patents Cardiograph stylus calibrationsÄownload PDF Info Publication number US2955895A US2955895A US706783A US70678358A US2955895A US 2955895 A US2955895 A US 2955895A US 706783 A US706783 A US 706783A US 70678358 A US70678358 A US 70678358A US 2955895 A US2955895 A US 2955895A Authority US United States Prior art keywords stylus magnet pressure tip paper Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US2955895A - Cardiograph stylus calibrations US2955895A - Cardiograph stylus calibrations
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