ES279324A1 - Improvements in safety relays - Google Patents

Improvements in safety relays

Info

Publication number
ES279324A1
ES279324A1 ES0279324A ES279324A ES279324A1 ES 279324 A1 ES279324 A1 ES 279324A1 ES 0279324 A ES0279324 A ES 0279324A ES 279324 A ES279324 A ES 279324A ES 279324 A1 ES279324 A1 ES 279324A1
Authority
ES
Spain
Prior art keywords
capacitor
output terminals
relay
supply
input
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
ES0279324A
Other languages
Spanish (es)
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.)
Forges et Ateliers de Constructions Electriques de Jeumont SA
Original Assignee
Forges et Ateliers de Constructions Electriques de Jeumont SA
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
Priority claimed from FR868670A external-priority patent/FR1304066A/en
Priority claimed from FR881837A external-priority patent/FR81158E/en
Application filed by Forges et Ateliers de Constructions Electriques de Jeumont SA filed Critical Forges et Ateliers de Constructions Electriques de Jeumont SA
Publication of ES279324A1 publication Critical patent/ES279324A1/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L7/00—Remote control of local operating means for points, signals, or track-mounted scotch-blocks
    • B61L7/06—Remote control of local operating means for points, signals, or track-mounted scotch-blocks using electrical transmission
    • B61L7/068—Protection against eddy-currents, short-circuits, or the like, for electric safety arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Relay Circuits (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

A circuit for converting a D.C. supply to an A.C. square waveform signal comprises a capacitor 5 which is charged from D.C. source S2 via resistor R 2 , a voltage stabilizing circuit comprising resistor R 1 and Zener diode Z, an alternating relay 3 which picks up and opens the charging circuit when the charge on capacitor 5 reaches a set level, and which releases when the capacitor discharge current has dropped to a predetermined low level and a second relay 4 which is picked up and released via a contact of relay 3 and connects the D.C. input supply to output terminals a 1 , b 1 via a set of polarity changeover contacts. In a second arrangement, Fig. 4 (not shown) in which the input is an A.C. supply, a pair of oppositely poled semiconductor triodes are connected in parallel and triggered alternately from a transistor pilot oscillator circuit. The triodes are connected in one of the leads joining the input and output terminals and a smoothing capacitor is connected across the output terminals. Specification 821,373 is referred to.
ES0279324A 1961-07-21 1962-07-17 Improvements in safety relays Expired ES279324A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR868670A FR1304066A (en) 1961-07-21 1961-07-21 Safety relays insensitive to interference currents
FR881837A FR81158E (en) 1961-12-13 1961-12-13 Safety relays insensitive to interference currents

Publications (1)

Publication Number Publication Date
ES279324A1 true ES279324A1 (en) 1963-01-16

Family

ID=26191557

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0279324A Expired ES279324A1 (en) 1961-07-21 1962-07-17 Improvements in safety relays

Country Status (3)

Country Link
CH (1) CH397836A (en)
ES (1) ES279324A1 (en)
GB (1) GB1009608A (en)

Also Published As

Publication number Publication date
GB1009608A (en) 1965-11-10
CH397836A (en) 1965-08-31

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