DE1157345B - Writing arm for heat recorders of electrocardiographs - Google Patents
Writing arm for heat recorders of electrocardiographsInfo
- Publication number
- DE1157345B DE1157345B DEA28309A DEA0028309A DE1157345B DE 1157345 B DE1157345 B DE 1157345B DE A28309 A DEA28309 A DE A28309A DE A0028309 A DEA0028309 A DE A0028309A DE 1157345 B DE1157345 B DE 1157345B
- Authority
- DE
- Germany
- Prior art keywords
- supply line
- heating coil
- metal tube
- writing arm
- electrocardiographs
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000004020 conductor Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 241000530268 Lycaena heteronea Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01D15/00—Component parts of recorders for measuring arrangements not specially adapted for a specific variable
- G01D15/10—Heated recording elements acting on heatsensitive layers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
- A61B5/333—Recording apparatus specially adapted therefor
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Medical Informatics (AREA)
- Biophysics (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- General Physics & Mathematics (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Description
Schreibarm für Wärmeschreiber von Elektrokardiographen Die Erfindung bezieht sich auf einen Schreibarm für Wärmeschreiber von Elektrokardiographen, bestehend aus einem vom Elektrokardiographen-Meßsystem schwenkbar angetriebenen, den Zeiger tragenden Metallröhrchen und einer innerhalb desselben an einem Ende angeordneten Heizwendel, die einseitig mit einer am anderen Ende in das Metallröhrchen hineinführenden elektrischen Zuleitung verbunden ist.Writing arm for heat recorders of electrocardiographs The invention refers to a writing arm for heat recorders of electrocardiographs, consisting of from a pivotably driven by the electrocardiograph measuring system, the pointer supporting metal tube and one arranged inside the same at one end Heating coil that leads into the metal tube on one side with one on the other end electrical supply is connected.
Es ist schwierig, die in dem Metallröhrchen liegende Verbindung zwischen der Zuleitung und der Heizwendel durch Löten oder Schweißen zu bewirken; sie wird deshalb bisher als Klemmverbindung ausgeführt, bei der die blanken Enden der Zuleitung und des Widerstandsleiters durch ein Metallröhrchen formschlüssig miteinander verbunden sind.It is difficult to get the connection between the metal tube to effect the supply line and the heating coil by soldering or welding; she will therefore previously designed as a clamp connection, in which the bare ends of the supply line and the resistance conductor are positively connected to one another by a metal tube are.
Eine solche Klemmverbindung ist jedoch nachteilig in mehrfacher Hinsicht. Da sie innerhalb des Metallröhrchens liegt, ist die Verbindungsstelle nach der Montage nicht mehr unmittelbar überprüfbar. Außerdem treten an der Verbindungsstelle der verschiedenen Leitermaterialien leicht Korrosionsschäden auf.However, such a clamp connection is disadvantageous in several respects. Since it is inside the metal tube, the connection point is after assembly no longer immediately verifiable. Also occur at the junction of the different conductor materials are susceptible to corrosion damage.
Für Zeiger mit offener Heizwendel ist es bekannt, die Heizwendel mit ihren zum Zeigerschwenklager führenden Zuleitungen aus einem einzigen Leiter von über seine ganze Länge gleicher Beschaffenheit herzustellen; eine solche Anordnung ist aber bei geschlossener Bauweise wegen der schlechteren Wärmeabstrahlung nicht zu gebrauchen.For pointers with an open heating coil, it is known to use the heating coil their leads leading to the pointer pivot bearing from a single conductor from to produce the same quality over its entire length; such an arrangement but is not in the case of a closed construction because of the poorer heat radiation to use.
All diese Nachteile lassen sich erfindungsgemäß dadurch vermeiden, daß die Heizwendel und ihre Zuleitung aus einem einzigen Stück Widerstandsdraht gebildet sind, dessen die Zuleitung bildendes Teilstück mit einem Überzug von elektrisch gut leitendem Material, insbesondere Kupfer, versehen ist. Dadurch ergibt sich eine Anordnung einfacher, gedrungener Bauweise von großer Betriebssicherheit. Zur Isolierung können Heizwendel und Zuleitung gemeinsam in einem Isolierrohr untergebracht sein.All these disadvantages can be avoided according to the invention by that the heating coil and its supply line are made from a single piece of resistance wire are formed, the lead-forming portion of which with a coating of electrical highly conductive material, especially copper, is provided. This results in a Arrangement of simple, compact design with great operational reliability. For isolation The heating coil and supply line can be housed together in an insulating tube.
Es ist an sich bekannt, die Erhitzung eines Stromleiters an einer gewünschten Stelle zu verhindern, indem man ihn dort mit einem überzug von elektrisch besser leitendem Material versieht. Beim Erfindungsgegenstand wird diese an sich bekannte Lösung nur als Teillösung verwendet, um zu erreichen, daß eine sonst zwischen Heizwendel und Zuleitung erforderliche besondere Verbindung entfällt.It is known per se, the heating of a conductor on a Prevent the desired place by placing it there with an electrical coating better conductive material. In the case of the subject matter of the invention, this is per se known solution only used as a partial solution to achieve an otherwise between No special connection required for heating coil and supply line.
Die Erfindung sei an einem in der Zeichnung dargestellten Ausführungsbeispiel veranschaulicht: Fig.1 zeigt im Schnitt den Zeiger eines Elektrokardiographen, in vergrößerter Darstellung, Fig.2 einen weiter vergrößerten Ausschnitt nach dem Kreis II in Fig.1.The invention is based on an embodiment shown in the drawing illustrates: Fig.1 shows in section the pointer of an electrocardiograph, in enlarged view, FIG. 2 shows a further enlarged section after the circle II in Fig. 1.
Dieser Zeiger besteht aus einem Metallröhrchen 1, ist um eine Achse 2 schwenkbar und wird durch ein geeignetes, z. B. elektromagnetisches System angetrieben. Im Innern des Röhrchens 1 ist an seinem oberen Ende ein spiralförmig gewickelter Widerstandsleiter 3 untergebracht, dessen äußeres Ende mit dem als Rückleitung dienenden Metallröhrchen 1 an der Stelle 4 verschweißt oder verlötet ist. Diese Rückleitung erfolgt nicht über eine bewegliche Leitung zur Stromquelle, sondern über Welle 2 und Rückstellfeder des Antriebssystems. Das innere Ende der Widerstandsspirale 3 ist durch einen Zuleiter von der Stelle 5 bis zum Anschluß 6 eines beweglichen Drahtes geführt. Dieser Leiter wird gebildet durch das nicht aufgewickelte Ende 7 der Drahtspirale 3, das mit einem gut leitenden Material 9, z. B. Kupfer, elektrolytisch überzogen ist. Ferner ist diese Zuleitung mit einer isolierenden Hülle, im dargestellten Beispiel einem Glasröhrchen 10 umhüllt. Dieses Isoherröhrchen 10 umhüllt nicht nur die Zuleitung 7, sondern auch die Widerstandsspirale 3.This pointer consists of a metal tube 1, is around an axis 2 pivotable and is by a suitable, z. B. Electromagnetic system driven. Inside the tube 1 is a spiral wound at its upper end Resistance conductor 3 housed, the outer end of which is used as a return line Metal tube 1 is welded or soldered at point 4. This return line does not take place via a movable line to the power source, but via shaft 2 and return spring of the drive system. The inner end of the resistance spiral 3 is through a lead from point 5 to terminal 6 of a movable wire guided. This conductor is formed by the unwound end 7 of the wire spiral 3, which is coated with a highly conductive material 9, e.g. B. copper, electrolytically coated is. Furthermore, this supply line is provided with an insulating sheath, in the example shown a glass tube 10 enveloped. This Isoherröhrchen 10 envelops not only the supply line 7, but also the spiral of resistance 3.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA28309A DE1157345B (en) | 1957-11-13 | 1957-11-13 | Writing arm for heat recorders of electrocardiographs |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA28309A DE1157345B (en) | 1957-11-13 | 1957-11-13 | Writing arm for heat recorders of electrocardiographs |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1157345B true DE1157345B (en) | 1963-11-14 |
Family
ID=6926627
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA28309A Pending DE1157345B (en) | 1957-11-13 | 1957-11-13 | Writing arm for heat recorders of electrocardiographs |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1157345B (en) |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE503385C (en) * | 1930-07-24 | Steatit Magnesia Ag | Process for the production of an electrical wire resistor, wound on a ceramic carrier and embedded in a glaze | |
DE583984C (en) * | 1933-09-13 | Electricitaetsgesellschaft San | Process for making connections to electrical heating elements with band-shaped heating wire | |
DE630976C (en) * | 1936-06-10 | Siemens & Halske Akt Ges | Process for the manufacture of electrical heating elements | |
US2664335A (en) * | 1950-01-11 | 1953-12-29 | Technicon Cardiograph Corp | Stylus for recorders |
DE943851C (en) * | 1953-04-30 | 1956-06-01 | Voigt & Haeffner Ag | Heating conductor coil preferably for tubular heating elements |
DE951169C (en) * | 1953-05-09 | 1956-10-25 | Fred Liechti A G | Writing arm with an electrical heating element at its end for writing on heat-sensitive paper in a fast-writing recorder |
DE1014246B (en) * | 1956-01-20 | 1957-08-22 | Fairchild Engine & Airplane | Process for resistance welding of sheets that are perpendicular to one another |
-
1957
- 1957-11-13 DE DEA28309A patent/DE1157345B/en active Pending
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE503385C (en) * | 1930-07-24 | Steatit Magnesia Ag | Process for the production of an electrical wire resistor, wound on a ceramic carrier and embedded in a glaze | |
DE583984C (en) * | 1933-09-13 | Electricitaetsgesellschaft San | Process for making connections to electrical heating elements with band-shaped heating wire | |
DE630976C (en) * | 1936-06-10 | Siemens & Halske Akt Ges | Process for the manufacture of electrical heating elements | |
US2664335A (en) * | 1950-01-11 | 1953-12-29 | Technicon Cardiograph Corp | Stylus for recorders |
DE943851C (en) * | 1953-04-30 | 1956-06-01 | Voigt & Haeffner Ag | Heating conductor coil preferably for tubular heating elements |
DE951169C (en) * | 1953-05-09 | 1956-10-25 | Fred Liechti A G | Writing arm with an electrical heating element at its end for writing on heat-sensitive paper in a fast-writing recorder |
DE1014246B (en) * | 1956-01-20 | 1957-08-22 | Fairchild Engine & Airplane | Process for resistance welding of sheets that are perpendicular to one another |
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