JPS56162671A - Temperature detection system for wire dot type printing head - Google Patents

Temperature detection system for wire dot type printing head

Info

Publication number
JPS56162671A
JPS56162671A JP6802580A JP6802580A JPS56162671A JP S56162671 A JPS56162671 A JP S56162671A JP 6802580 A JP6802580 A JP 6802580A JP 6802580 A JP6802580 A JP 6802580A JP S56162671 A JPS56162671 A JP S56162671A
Authority
JP
Japan
Prior art keywords
circuit
resistance
output
printing
level signal
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
Application number
JP6802580A
Other languages
Japanese (ja)
Inventor
Yutaka Nakajima
Kiyobumi Nosaka
Tetsuo Nakai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Usac Electronic Ind Co Ltd
Original Assignee
Usac Electronic Ind Co Ltd
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 Usac Electronic Ind Co Ltd filed Critical Usac Electronic Ind Co Ltd
Priority to JP6802580A priority Critical patent/JPS56162671A/en
Publication of JPS56162671A publication Critical patent/JPS56162671A/en
Pending legal-status Critical Current

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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/377—Cooling or ventilating arrangements

Abstract

PURPOSE:To prevent a magnetic coil for driving a printing pin from burning and and avoid missing in printing dots by a method wherein the resistance of each magnetic coil assigned to each printing pin is measured, the measured values are processed to obtain a single measurement result and the latter is compared to a reference value. CONSTITUTION:Resistance change detecting circuits 17 are provided to detect the changes in the resistance of the magnetic coils 13, respectively. When the temperature of the coil 13 is raised to increase the resistance RL thereof, the output voltage of an amplifier 24 is increased. The outputs of the detecting circuits 17 are connected commonly to a comparison circuit 19 through diodes 18 respectively, and the highest of the outputs is inputted into the cmparison circuit 19. Said highest output is compared in the circuit 19 to a set voltage of a power source 20 for the reference resistance, and when it is higher than the set voltage, a high-level signal is outputted from the circuit 19. An AND circuit 22 generates a high-level signal when both the output of the comparison circuit 19 and the output of a inverting circuit 21 (which generates a high-level signal when a printing-head driving signal is at low level) are high, and cause a temperature alarm 23 to issue an alarm.
JP6802580A 1980-05-21 1980-05-21 Temperature detection system for wire dot type printing head Pending JPS56162671A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6802580A JPS56162671A (en) 1980-05-21 1980-05-21 Temperature detection system for wire dot type printing head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6802580A JPS56162671A (en) 1980-05-21 1980-05-21 Temperature detection system for wire dot type printing head

Publications (1)

Publication Number Publication Date
JPS56162671A true JPS56162671A (en) 1981-12-14

Family

ID=13361853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6802580A Pending JPS56162671A (en) 1980-05-21 1980-05-21 Temperature detection system for wire dot type printing head

Country Status (1)

Country Link
JP (1) JPS56162671A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664542A (en) * 1984-08-31 1987-05-12 Kabushiki Kaisha Toshiba Temperature control device for a printing head
JPH04169245A (en) * 1990-11-02 1992-06-17 Nec Data Terminal Ltd Temperature detecting device for printing head
JPH06166189A (en) * 1992-11-30 1994-06-14 Seikosha Co Ltd Drive circuit for impact printer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664542A (en) * 1984-08-31 1987-05-12 Kabushiki Kaisha Toshiba Temperature control device for a printing head
JPH04169245A (en) * 1990-11-02 1992-06-17 Nec Data Terminal Ltd Temperature detecting device for printing head
JPH06166189A (en) * 1992-11-30 1994-06-14 Seikosha Co Ltd Drive circuit for impact printer

Similar Documents

Publication Publication Date Title
US4639665A (en) Sensing system for measuring a parameter
US4560928A (en) Velocity or distance measuring apparatus using magnetic dipoles
CA2192330A1 (en) Low Power Magnetometer Circuits
JPS56162671A (en) Temperature detection system for wire dot type printing head
JPS54142987A (en) Protecting method from overdrive of semiconductor laser
JPS54156504A (en) Head stain detecting circuit
JPS6422477A (en) Power source controller for inverter type resistance welding machine
DE3361851D1 (en) Method and device for automatically demanding signal measure values and signal identification in an alarm installation
EP0147968A3 (en) Temperature compensated magnetic bubble memory
JPS5556495A (en) A.c. motor controller
US4604573A (en) Drift resistant magnet strength signal evaluation circuit
JPS57128566A (en) Printing wire drive circuit
SU1012052A2 (en) Force measuring device
SU1296861A1 (en) Device for contactless checking of temperature
JPS6429723A (en) Torque detecting circuit
JPS6446657A (en) Current measurement system
JPH0535830B2 (en)
SU1226260A1 (en) Arrangement for measuring coercive force of ferromagnetic materials
JPS5629114A (en) Magnetic scale
SU1059454A1 (en) Device for measuring parameters on rotating shafts
SU580104A2 (en) Apparatus for contactless active monitoring of components
JPS6487267A (en) Printing duty supervising system
SU1241122A1 (en) Device or non-destructive testing of ferromagnetic articles
JPS56130904A (en) Defect detecting circuit for constant-current controlled coil driving circuit
JPS55150798A (en) Method for detecting irregular operation of electric pulse motor