GB652262A - Electrical signalling system with a constant number of signal elements and two alternating current frequencies - Google Patents

Electrical signalling system with a constant number of signal elements and two alternating current frequencies

Info

Publication number
GB652262A
GB652262A GB33289/47A GB3328947A GB652262A GB 652262 A GB652262 A GB 652262A GB 33289/47 A GB33289/47 A GB 33289/47A GB 3328947 A GB3328947 A GB 3328947A GB 652262 A GB652262 A GB 652262A
Authority
GB
United Kingdom
Prior art keywords
relay
signal
energizes
impulse
code
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
GB33289/47A
Other languages
English (en)
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB652262A publication Critical patent/GB652262A/en
Priority claimed from GB2206561A external-priority patent/GB959476A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mechanical Engineering (AREA)
  • Relay Circuits (AREA)
  • Credit Cards Or The Like (AREA)
GB33289/47A 1943-06-01 1947-12-17 Electrical signalling system with a constant number of signal elements and two alternating current frequencies Expired GB652262A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL652262X 1943-06-01
GB2206561A GB959476A (en) 1961-06-19 1961-06-19 Fluid flow control valves

Publications (1)

Publication Number Publication Date
GB652262A true GB652262A (en) 1951-04-18

Family

ID=26255694

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33289/47A Expired GB652262A (en) 1943-06-01 1947-12-17 Electrical signalling system with a constant number of signal elements and two alternating current frequencies

Country Status (3)

Country Link
BE (1) BE461666A (enrdf_load_stackoverflow)
FR (1) FR959474A (enrdf_load_stackoverflow)
GB (1) GB652262A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
BE461666A (enrdf_load_stackoverflow)
FR959474A (enrdf_load_stackoverflow) 1950-03-30

Similar Documents

Publication Publication Date Title
GB706687A (en) Electrical signal generating systems
US4172963A (en) Checker and automatic synchronizer for coding equipment
US3740550A (en) Pulse coded railway signal system
GB652262A (en) Electrical signalling system with a constant number of signal elements and two alternating current frequencies
GB863027A (en) Improvements in or relating to electrical apparatus for providing an electrical indication of the relative positions of relatively movable means
US3226679A (en) Electronic selective ringing decoder system
DK119930B (da) Kobling til tonefrekvenstastaturvalg uden jævnstrømsvælgeimpulsovervågningssignal i telekommunikationsanlæg, især telefonanlæg.
GB1360995A (en) Relaying system with time delay signal device
GB1152257A (en) Improvements in or relating to Electric Signalling Systems
US2445809A (en) Timing device for telegraph circuit
GB1296064A (enrdf_load_stackoverflow)
GB526988A (en) Improvements in or relating to printing telegraph receiving apparatus
US2386133A (en) Call transmitter
US3686445A (en) Timing signal generators
GB882525A (en) Improvements in or relating to magnetic information storage arrangements
US2546369A (en) Start-stop repeater
US3214522A (en) Relay arrangement for the reception and repetition of impulse trains
US2634403A (en) Control and marking circuits for adding-type impulse counters
GB807814A (en) Electric coded signal transmission systems
US2177512A (en) Electric communication system
US2976366A (en) Telephone station identification system
GB913038A (en) Improvements in and relating to telephone systems
GB645264A (en) Code identification systems
SU1198758A1 (ru) Регенератор двоичных сигналов
GB774943A (en) Odd mark detector for radio printing telegraph systems