CH570077A5 - Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet - Google Patents

Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet

Info

Publication number
CH570077A5
CH570077A5 CH288274A CH288274A CH570077A5 CH 570077 A5 CH570077 A5 CH 570077A5 CH 288274 A CH288274 A CH 288274A CH 288274 A CH288274 A CH 288274A CH 570077 A5 CH570077 A5 CH 570077A5
Authority
CH
Switzerland
Prior art keywords
magnet
transistor
electromagnet
current
circuit
Prior art date
Application number
CH288274A
Other languages
German (de)
Original Assignee
Scheinhuette Hans Juergen
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 as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Scheinhuette Hans Juergen filed Critical Scheinhuette Hans Juergen
Priority to CH288274A priority Critical patent/CH570077A5/en
Publication of CH570077A5 publication Critical patent/CH570077A5/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/44—Control for hammer-impression mechanisms
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/60—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors
    • H03K17/64—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being bipolar transistors having inductive loads

Landscapes

  • Character Spaces And Line Spaces In Printers (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)

Abstract

The control circuit for a serial printer or read-out system electromagnet has the electromagnet connected between a transistor collector and one supply pole. The electromagnet is operated by applying a signal to the transistor base. The single transistor may be replaced by a Darlington pair. The advantage of this circuit is its steep current rise, since almost the full supply voltage is applied to the electromagnet, insensitivity to supply voltage fluctuations, and no reduction in attractive force due to heating.

Description

  

  
 



   Es gibt Seriendrucker. z. B. als Ausgabeorgane für elektro tische Tischrechner, die nicht von einem Motor, sondern   ur    von Elektromagneten gesteuert werden. An diese Ma   :netze    werden wegen der gewünschten Druckgeschwindig   ceit    verhältnismässig hohe Anforderungen gestellt. Die be   ichriebene    Schaltung bringt hier einige Vorteile, die nachfol   Xend    erläutert werden.



   Ein Ausführungsbeispiel einer erfindungsgemässen Schal   :ung    zeigt Fig. 1. Darin ist A der Ausgang einer elektroni   eichen    Schaltung, z. B. eines Tischrechners ICs, von dem der Drucker angesteuert werden soll. M ist ein Magnet des Drukcers, L eine Einrichtung zur Löschung der Induktionsspitze    > eim    Abschalten des Magneten, T der Ansteuertransistor   ind    U die Magnetbetriebsspannung.



   Sobald an A eine positive Spannung liegt, wird der Transi tor T leitend. Dabei fällt am Emitterwiderstand RE eine pannung ab, die dem Emitterstrom und damit weitgehend luch dem Kollektorstrom proportional ist. Es gilt UA = UE   s UBE    Sofern UE   D    UBE gemacht wird, was technisch kein   'problem    ist, gilt UA   w    UE   a      ICRE    d. h. der Strom ist propor tional UA. Wenn nun dafür gesorgt wird, dass die Stromverstärkung des Transistors T genügend hoch ist, bzw. gegebenenfalls eine Darlington-Schaltung verwendet wird, so stört auch der Spannungsabfall am Innenwiderstand der steuernden Schaltung durch den Basisstrom nicht. 

  Diese Schaltung bietet folgende Vorteile: Steiler Stromanstieg. da beim Einschalten die gesamte Versorgungsspannung am Magneten liegt. Geringe Verlustleistung am Magneten durch Begrenzung des Maximalstroms. Unempfindlichkeit gegen Schwankungen der Versorgungsspannung. Keine Reduktion der Anzugskraft bei Erwärmung.



   PATENTANSPRUCH:



   Schaltung zur Ansteuerung eines Magneten für einen Seriendrucker, dadurch gekennzeichnet, dass der Magnet zwischen einem Pol einer Betriebsspannungsquelle und dem Kol lektor eines Transistors geschaltet ist, dessen Emitter über einen Widerstand mit dem anderen Pol der Betriebsspannungsquelle verbunden ist, während die Basis an die ansteuernde Signalquelle angeschlossen ist.

**WARNUNG** Ende DESC Feld konnte Anfang CLMS uberlappen**.



   



  
 



   There are mail mergers. z. B. as output organs for electrical tables desktop computer that are not controlled by a motor, but ur solenoid. Relatively high demands are placed on these meshes because of the desired printing speed. The circuit described here has some advantages, which are explained below.



   An exemplary embodiment of a circuit according to the invention is shown in FIG. 1. Here, A is the output of an electronic circuit, e.g. B. a desktop computer ICs from which the printer is to be controlled. M is a magnet of the printer, L is a device for quenching the induction peak> when the magnet is switched off, T is the control transistor and U is the magnet operating voltage.



   As soon as there is a positive voltage at A, the transistor T becomes conductive. In this case, a voltage drops across the emitter resistor RE, which is proportional to the emitter current and thus largely luch the collector current. UA = UE s UBE If UE D UBE is done, which is not a technical problem, UA w UE a ICRE d. H. the current is proportional to UA. If it is now ensured that the current gain of the transistor T is sufficiently high, or if a Darlington circuit is used, the voltage drop across the internal resistance of the controlling circuit due to the base current does not interfere.

  This circuit offers the following advantages: A steep rise in current. since the entire supply voltage is applied to the magnet when it is switched on Low power loss at the magnet by limiting the maximum current. Insensitivity to fluctuations in the supply voltage. No reduction in tightening force when heated.



   PATENT CLAIM:



   Circuit for controlling a magnet for a serial printer, characterized in that the magnet is connected between a pole of an operating voltage source and the collector of a transistor, the emitter of which is connected to the other pole of the operating voltage source via a resistor, while the base is connected to the controlling signal source connected.

** WARNING ** End of DESC field could overlap beginning of CLMS **.

Claims (1)

**WARNUNG** Anfang CLMS Feld konnte Ende DESC uberlappen **. ** WARNING ** Beginning of CLMS field could overlap end of DESC **. Es gibt Seriendrucker. z. B. als Ausgabeorgane für elektro tische Tischrechner, die nicht von einem Motor, sondern ur von Elektromagneten gesteuert werden. An diese Ma :netze werden wegen der gewünschten Druckgeschwindig ceit verhältnismässig hohe Anforderungen gestellt. Die be ichriebene Schaltung bringt hier einige Vorteile, die nachfol Xend erläutert werden. There are mail mergers. z. B. as output organs for electrical tables desktop computer that are not controlled by a motor, but ur solenoid. Relatively high demands are placed on these meshes because of the desired printing speed. The circuit described here has some advantages, which are explained below. Ein Ausführungsbeispiel einer erfindungsgemässen Schal :ung zeigt Fig. 1. Darin ist A der Ausgang einer elektroni eichen Schaltung, z. B. eines Tischrechners ICs, von dem der Drucker angesteuert werden soll. M ist ein Magnet des Drukcers, L eine Einrichtung zur Löschung der Induktionsspitze > eim Abschalten des Magneten, T der Ansteuertransistor ind U die Magnetbetriebsspannung. An exemplary embodiment of a circuit according to the invention is shown in FIG. 1. Here, A is the output of an electronic circuit, e.g. B. a desktop computer ICs from which the printer is to be controlled. M is a magnet of the printer, L is a device for quenching the induction peak> when the magnet is switched off, T is the control transistor and U is the magnet operating voltage. Sobald an A eine positive Spannung liegt, wird der Transi tor T leitend. Dabei fällt am Emitterwiderstand RE eine pannung ab, die dem Emitterstrom und damit weitgehend luch dem Kollektorstrom proportional ist. Es gilt UA = UE s UBE Sofern UE D UBE gemacht wird, was technisch kein 'problem ist, gilt UA w UE a ICRE d. h. der Strom ist propor tional UA. Wenn nun dafür gesorgt wird, dass die Stromverstärkung des Transistors T genügend hoch ist, bzw. gegebenenfalls eine Darlington-Schaltung verwendet wird, so stört auch der Spannungsabfall am Innenwiderstand der steuernden Schaltung durch den Basisstrom nicht. As soon as there is a positive voltage at A, the transistor T becomes conductive. In this case, a voltage drops across the emitter resistor RE, which is proportional to the emitter current and thus largely luch the collector current. UA = UE s UBE If UE D UBE is done, which is not a technical problem, UA w UE a ICRE d. H. the current is proportional to UA. If it is now ensured that the current gain of the transistor T is sufficiently high or, if necessary, a Darlington circuit is used, the voltage drop across the internal resistance of the controlling circuit due to the base current does not interfere either. Diese Schaltung bietet folgende Vorteile: Steiler Stromanstieg. da beim Einschalten die gesamte Versorgungsspannung am Magneten liegt. Geringe Verlustleistung am Magneten durch Begrenzung des Maximalstroms. Unempfindlichkeit gegen Schwankungen der Versorgungsspannung. Keine Reduktion der Anzugskraft bei Erwärmung. This circuit offers the following advantages: A steep rise in current. since the entire supply voltage is applied to the magnet when it is switched on. Low power loss at the magnet by limiting the maximum current. Insensitivity to fluctuations in the supply voltage. No reduction in tightening force when heated. PATENTANSPRUCH: PATENT CLAIM: Schaltung zur Ansteuerung eines Magneten für einen Seriendrucker, dadurch gekennzeichnet, dass der Magnet zwischen einem Pol einer Betriebsspannungsquelle und dem Kol lektor eines Transistors geschaltet ist, dessen Emitter über einen Widerstand mit dem anderen Pol der Betriebsspannungsquelle verbunden ist, während die Basis an die ansteuernde Signalquelle angeschlossen ist. Circuit for controlling a magnet for a serial printer, characterized in that the magnet is connected between one pole of an operating voltage source and the collector of a transistor, the emitter of which is connected via a resistor to the other pole of the operating voltage source, while the base is connected to the controlling signal source connected.
CH288274A 1974-02-28 1974-02-28 Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet CH570077A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH288274A CH570077A5 (en) 1974-02-28 1974-02-28 Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH288274A CH570077A5 (en) 1974-02-28 1974-02-28 Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet

Publications (1)

Publication Number Publication Date
CH570077A5 true CH570077A5 (en) 1975-11-28

Family

ID=4243706

Family Applications (1)

Application Number Title Priority Date Filing Date
CH288274A CH570077A5 (en) 1974-02-28 1974-02-28 Control cct. for printer electromagnet - has transistor with electromagnet in collector cct. allowing full voltage supply drop across magnet

Country Status (1)

Country Link
CH (1) CH570077A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028131A1 (en) * 1979-10-25 1981-05-06 The Rank Organisation Limited Electro-mechanical elapsed time recorder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0028131A1 (en) * 1979-10-25 1981-05-06 The Rank Organisation Limited Electro-mechanical elapsed time recorder

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