GB912319A - Improvements in or relating to recording instruments - Google Patents

Improvements in or relating to recording instruments

Info

Publication number
GB912319A
GB912319A GB219858A GB219858A GB912319A GB 912319 A GB912319 A GB 912319A GB 219858 A GB219858 A GB 219858A GB 219858 A GB219858 A GB 219858A GB 912319 A GB912319 A GB 912319A
Authority
GB
United Kingdom
Prior art keywords
jan
relating
recording instruments
transistor
potentiometers
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.)
Expired
Application number
GB219858A
Inventor
John Edsall Rich
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Priority to GB219858A priority Critical patent/GB912319A/en
Priority to CH6850659A priority patent/CH373812A/en
Priority to FR784514A priority patent/FR1222698A/en
Publication of GB912319A publication Critical patent/GB912319A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/34—Negative-feedback-circuit arrangements with or without positive feedback

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Recording Measured Values (AREA)

Abstract

912,319. Transistor and valve circuits. PHILIPS ELECTRICAL INDUSTRIES Ltd. Jan. 1, 1959 [Jan. 22, 1958], No. 2198/58. Class 40 (6). [Also in Group XIX] The output stage of a push-pull transistor amplifier feeding the operating coil 39 of a recorder also supplies the heating current for associated valve filaments and for a stylus heater, by connecting them in place of the common emitter resistor 41. The input signal is applied at 52 and 53 and the zero current values are controlled by potentiometers 56 and 58.
GB219858A 1958-01-22 1958-01-22 Improvements in or relating to recording instruments Expired GB912319A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB219858A GB912319A (en) 1958-01-22 1958-01-22 Improvements in or relating to recording instruments
CH6850659A CH373812A (en) 1958-01-22 1959-01-19 Electrical amplifier device
FR784514A FR1222698A (en) 1958-01-22 1959-01-20 Electric amplifiers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB219858A GB912319A (en) 1958-01-22 1958-01-22 Improvements in or relating to recording instruments

Publications (1)

Publication Number Publication Date
GB912319A true GB912319A (en) 1962-12-05

Family

ID=9735315

Family Applications (1)

Application Number Title Priority Date Filing Date
GB219858A Expired GB912319A (en) 1958-01-22 1958-01-22 Improvements in or relating to recording instruments

Country Status (3)

Country Link
CH (1) CH373812A (en)
FR (1) FR1222698A (en)
GB (1) GB912319A (en)

Also Published As

Publication number Publication date
FR1222698A (en) 1960-06-13
CH373812A (en) 1963-12-15

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