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GB1294698A - Circuit for monitoring faults in a signal lamp circuit - Google Patents

Circuit for monitoring faults in a signal lamp circuit

Info

Publication number
GB1294698A
GB1294698A GB55996/69A GB5599669A GB1294698A GB 1294698 A GB1294698 A GB 1294698A GB 55996/69 A GB55996/69 A GB 55996/69A GB 5599669 A GB5599669 A GB 5599669A GB 1294698 A GB1294698 A GB 1294698A
Authority
GB
United Kingdom
Prior art keywords
transistor
lamp
circuit
fault
turn
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
GB55996/69A
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.)
Hasler AG
Original Assignee
Hasler AG
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 CH1749268A external-priority patent/CH491452A/en
Application filed by Hasler AG filed Critical Hasler AG
Publication of GB1294698A publication Critical patent/GB1294698A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00Circuit arrangements or apparatus for operating incandescent light sources
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20Responsive to malfunctions or to light source life; for protection
    • H05B47/21Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

1294698 Lamp failure alarms HASLER AG 14 Nov 1969 [25 Nov 1968 7 May 1969] 55996/69 Heading G4N In a circuit for monitoring faults in a signal lamp control circuit having a transistor 5, controlled by a signal voltage E, a pulse transmitter 20 is arranged to deliver test pulses to transistor 5 and to a fault indicator circuit 22-26 which provides an indication if a voltage which does not correspond to the switched state of transistor 5, determined by the test pulse, occurs at the junction of transistor 5 and lamp 1. As shown, a signal at E may be passed by gates 3, 4 to turn on transistor 5 and operate lamp 1. Each test pulse A inhibits gate 3 so as to turn off transistor 5 and hence provide a pulse at the collector which is fed to a fault indicating circuit 23 . . . 26 which lights lamp 26 if lamp 1 is faulty or if transistor 5 fails to turn off. Pulses B are used in conjunction with a fault indicating circuit 33 ... 36 to light lamp 36 if an open-circuit fault should occur in gate 4 or transistor 5. AND gates 7, 8; 17, 18 couple a further lamp 11 (controlled by transistor 15) to the fault indicators. Lamp 39 indicates a fault of either type in circuits 2 and 12. The mark/space ratio of pulses A may be sufficiently small as to have no effect on the brightness of lamps 1, 11 or may be varied to provide a brightness control.
GB55996/69A 1968-11-25 1969-11-14 Circuit for monitoring faults in a signal lamp circuit Expired GB1294698A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1749268A CH491452A (en) 1968-11-25 1968-11-25 Circuit for monitoring the operational readiness of at least one DC-fed signal lamp and the transistor controlling it
CH690069A CH501285A (en) 1968-11-25 1969-05-07 Circuit for monitoring the operational readiness of at least one DC-fed signal lamp and the transistor controlling it

Publications (1)

Publication Number Publication Date
GB1294698A true GB1294698A (en) 1972-11-01

Family

ID=25700359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB55996/69A Expired GB1294698A (en) 1968-11-25 1969-11-14 Circuit for monitoring faults in a signal lamp circuit

Country Status (12)

Country Link
JP (1) JPS4844076B1 (en)
BE (1) BE741924A (en)
CH (1) CH501285A (en)
CS (1) CS178063B2 (en)
DE (1) DE1956560B2 (en)
FR (1) FR2024204A1 (en)
GB (1) GB1294698A (en)
NL (1) NL6917673A (en)
PL (1) PL72701B1 (en)
RO (1) RO58917A (en)
SE (1) SE344839B (en)
YU (1) YU32418B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112816804A (en) * 2019-11-15 2021-05-18 中车株洲电力机车研究所有限公司 High-integration pulse testing device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211251C2 (en) * 1982-03-26 1985-09-26 Steinbock Gmbh, 8052 Moosburg Circuit arrangement for monitoring the degree of wear of commutator carbon brushes
EP0264449B1 (en) * 1986-04-24 1991-07-17 Nauchno-Issledovatelsky I Experimentalny Institut Avtomobilnogo Elektroborudovania I Avtopriborov Apparatus for measuring temporal parameters of light signalling devices
JPS6376336U (en) * 1986-11-04 1988-05-20
FR2675266B1 (en) * 1991-04-10 1995-09-01 Cheylus Jacques FUNCTION DETECTOR WITH COUNTER.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112816804A (en) * 2019-11-15 2021-05-18 中车株洲电力机车研究所有限公司 High-integration pulse testing device
CN112816804B (en) * 2019-11-15 2024-04-26 中车株洲电力机车研究所有限公司 Pulse testing device with high integration level

Also Published As

Publication number Publication date
BE741924A (en) 1970-05-04
DE1956560A1 (en) 1970-06-11
YU32418B (en) 1974-10-31
PL72701B1 (en) 1974-08-30
RO58917A (en) 1976-01-15
YU293769A (en) 1974-04-30
FR2024204A1 (en) 1970-08-28
JPS4844076B1 (en) 1973-12-22
NL6917673A (en) 1970-05-27
SE344839B (en) 1972-05-02
CH501285A (en) 1970-12-31
DE1956560B2 (en) 1977-11-17
CS178063B2 (en) 1977-08-31

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee