GB152190A - Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like - Google Patents

Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like

Info

Publication number
GB152190A
GB152190A GB2340619A GB2340619A GB152190A GB 152190 A GB152190 A GB 152190A GB 2340619 A GB2340619 A GB 2340619A GB 2340619 A GB2340619 A GB 2340619A GB 152190 A GB152190 A GB 152190A
Authority
GB
United Kingdom
Prior art keywords
relays
telegraphic
recorders
valves
battery
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
GB2340619A
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.)
JAMES HENRY SMART
Original Assignee
JAMES HENRY SMART
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 JAMES HENRY SMART filed Critical JAMES HENRY SMART
Priority to GB2340619A priority Critical patent/GB152190A/en
Publication of GB152190A publication Critical patent/GB152190A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/02—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with tubes only

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Hybrid Cells (AREA)

Abstract

152,190. Smart, J. H., and Tucker, J. Sept. 23, 1919. Thermionic relays and repeaters.-In an amplifying system employing two threeelectrode valves for telegraphic recorders, relays, and telephones, the grid g<1>, Fig. 1, of the valve P is connected to line, the anodes a<1>, a<2> of the valves P, Q to the battery B, the earthed filament j' of the valve P to the grid g<2> of the valve Q, and the filament f<2> of the valve Q to the battery through a recorder R. In the arrangement shown in Fig. 2 the normal current from the battery B through the valves P, Q and receiver R is balanced by a current from the battery B<1> through the resistancer<1>. The two valves may be combined in one unit.
GB2340619A 1919-09-23 1919-09-23 Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like Expired GB152190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2340619A GB152190A (en) 1919-09-23 1919-09-23 Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2340619A GB152190A (en) 1919-09-23 1919-09-23 Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like

Publications (1)

Publication Number Publication Date
GB152190A true GB152190A (en) 1920-10-14

Family

ID=10195096

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2340619A Expired GB152190A (en) 1919-09-23 1919-09-23 Improvements in or relating to telegraphic recorders, relays, telephonic receivers or the like

Country Status (1)

Country Link
GB (1) GB152190A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743016C (en) * 1938-06-14 1943-12-16 Ericsson Telefon Ab L M Receiving arrangement for alternating current telegraphy

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743016C (en) * 1938-06-14 1943-12-16 Ericsson Telefon Ab L M Receiving arrangement for alternating current telegraphy

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