US3660714A - Emergency lighting system - Google Patents

Emergency lighting system Download PDF

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US3660714A
US3660714A US25879A US3660714DA US3660714A US 3660714 A US3660714 A US 3660714A US 25879 A US25879 A US 25879A US 3660714D A US3660714D A US 3660714DA US 3660714 A US3660714 A US 3660714A
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Prior art keywords
circuit
battery
power
lamp
oscillator
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Expired - Lifetime
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US25879A
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English (en)
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Edward A Chandler
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TENELUX Ltd
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TENELUX Ltd
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices
    • H05B41/285—Arrangements for protecting lamps or circuits against abnormal operating conditions
    • H05B41/2851—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions
    • H05B41/2853—Arrangements for protecting lamps or circuits against abnormal operating conditions for protecting the circuit against abnormal operating conditions against abnormal power supply conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
    • H02J9/065—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads for lighting purposes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/5383—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement
    • H02M7/53832—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement
    • H02M7/53835—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a self-oscillating arrangement in a push-pull arrangement of the parallel type
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices
    • H05B41/2821—Circuit arrangements in which the lamp is fed by power derived from DC by means of a converter, e.g. by high-voltage DC using static converters with semiconductor devices by means of a single-switch converter or a parallel push-pull converter in the final stage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Definitions

  • Hostetter Attorney-Alan Swabey ABSTRACT An emergency lighting system for electric discharge lamps utilizing an AC DC inverter to supply emergency power and having a normally non-conductive switching element in the feedback circuit of the inverter which enables the inverter upon failure of line power.
  • relays are subject to mechanical wear after a period of use or likely to be affected adversely by vibration or shock.
  • Relay contacts may fail to make adequate electrical connection after a period of time due to an accumulation of dust or other foreign matter or due to atmospheric corrosion or corrosion caused by sparking.
  • a relay consumes an appreciable amount of power which adds to the running costs of the equipment and which results in a generation of heat that may be undesirable, particularly if the relay is in a compact enclosure. [t is, therefore, advantageous to eliminate the use of relays or other moving parts in an emergency lighting system.
  • static switching circuits When static switching circuits are used it is common practice to insert the switching element in series with the battery and the load.
  • the voltage drop introduced by a switching circuit in line with the battery and the lamp and/or inverter is undesirable in that the switching element introduces a voltage drop that subtracts from the voltage delivered by the battery and so reduces the efficiency of the circuit.
  • a typical silicon control rectifier used as a switching element develops a forward voltage drop of about 1 volt when carrying current in its conducting state.
  • batteries of relatively low voltages are commonly used for reasons of economy as, for example, 6 volts. Therefore a drop of 1 volt in the switching element represents an appreciable proportion of the supply of the battery voltage and, therefore, the switching element consumes an appreciable proportion of the power delivered by the battery. This consumption of such a substantial proportion of the power delivered by the battery requires that the battery must be of larger capacity and therefore more expensive than would otherwise be necessary to supply the load itself.
  • the present invention provides a new and improved circuit for emergency lighting systems which overcomes the aforementioned limitations and deficiencies of presently known emergency lighting systems.
  • the invention in one form, comprises an emergency lighting system for electric discharge type lamps in which a battery voltage is inverted to provide alternating AC energy.
  • a static switching element for example a controlled rectifier (thyristor), or transistor is coupled between the battery and the inverter so as to switch the feedback circuit of the inverter instead of the power line thereto.
  • the invention further provides a self-contained fluorescent lighting fixture, which can provide illumination when the AC line power is available and which continues to provide illumination if the line power supply fails.
  • the present invention is effective to enable the emergency lighting system regardless of whether the lamp is then in operation or, alternatively, it can be connected so that emergency light is provided under power failure conditions only when the lamp is switched on. Additionally a system embodying the invention is so arranged that the circuit which senses AC line power is also effective to provide a battery charging current. An inverter disabling circuit is also responsive to the charging current to disable the inverter so long as AC line power is sensed.
  • An object of this invention is to provide a new and improved emergency lighting system.
  • Another object of this invention is to provide a new and improved emergency lighting system of simplified and economical construction.
  • Another object of this invention is to provide a new and improved emergency lighting system using a DC AC inverter in which a semi-conductor switching device is incorporated in the feedback circuit of the inverter and is arranged to positively switch between inverter inhibiting and enabling conditions when failure of line power is sensed.
  • a further object of this invention is to provide a low cost, simplified emergency lighting system which may be housed in the same fixture as the lamp which it serves.
  • FIG. 1 is a schematic wiring diagram of an emergency lighting system employing a fluorescent light
  • FIG. 2 is a cut-away side elevation of a fluorescent lighting fixture which incorporates the circuit illustrated in FIG. 1.
  • B is a battery consisting of one or more cells which may be of the primary type (such as dry cells) or of the secondary type (such as re-chargeable nickel-cadmium).
  • This battery B is connected with polarities as shown in FIG. 1 to input terminals 1 and 2 of an inverter, INV, the basic elements of which are described as follows:
  • T1 is an inverter transformer, equipped with primary windings N1 and N2, feedback windings N3 and N4, and an output or load winding N5, these windings having polarities indicatcd by start marksQ
  • the core of inverter transformer T1 is of any ferro-magnetic material which displays sufficiently low hysteresis and eddy current losses at the operating frequency of the inverter. Ferrite material has been found satisfactory, for example.
  • the emitter-collector paths of transistors 01 and Q2 are connected in series with the primary windings, N1 and N2, respectively of inverter transformer T1, across the battery B at terminals 1 and 2.
  • the bases of transistors Q1 and Q2 are alternately driven so that if O1 is turned on while Q2 is cut-ofi, and then after a certain time interval, the base drive is reversed so that 01 becomes cut-off and Q2 is turned on for a certain time interval, and these alternations of base drive are continued, then substantially all the voltage of battery B will alternately be impressed across windings N1 and N2.
  • the polarities of these windings are such that an alternating magnetic flux, having an approximately square wave shape, will be created in the core of inverter transformer T1. By transformer action, alternating voltages will be induced in other windings on the core of transformer T1.
  • Feedback windings N3 and N4 are joined to a feedback terminal at point 7 and are connected to the bases of transistors Q1 and 02 at points 5 and 6 respectively.
  • windings N3 and N4 can provide suitable base drive for transistors Q1 and Q2 and the combination of inverter transformer T1 and transistors Q1 and Q2 forms a self-saturating inverter of a type well known to those skilled in the art.
  • inverter circuit herein described is intended as exemplary and not limitative of the invention. Whereas the inverter circuit has been described using transistors of the p-n-p type, other transistors of the n-p-n type or controlled rectifier may equally well be used with appropriate modifications to the circuit. Also, whereas an inverter circuit has been described in which the emitters of the transistors are connected to the primary windings of the inverter transformer and the collectors of the transistors are connected to a common point, a circuit in which the collectors of the transistors are connected to the primary windings of the inverter transformer, and the emitters are connected to a common point may equally well be used.
  • inverter circuit using two transistors
  • other circuits in which one transistor and its associated windings are omitted may equally well be used.
  • the inverter may be of any suitable free running oscillator having a feedback circuit to sustain oscillations.
  • a static switching circuit which can provide a path for current flow between point 7 and point 2 comprises a resistor R1, controlled rectifier (often referred to, particularly in European terminology, as a thyristor) CR, resistor R2 and the secondary winding N6 of a transformer T2 having a primary winding N7.
  • resistor R2 is considered as including the resistance of the winding N6.
  • the primary winding of transformer T2, N7 is connected to terminals 8 and 9 which are connected to the AC power supply.
  • a capacitor, C1 is connected between the gate 10 and the cathode ll of controlled rectifier CR.
  • the battery positive terminal l is connected through a resistor, R4, in parallel with a diode, D2, to the gate 10 of controlled rectifier CR.
  • the battery positive terminal 1 is also connected through a resistor, R3, in series with a diode, D1, to the cathode ll of controlled rectifier CR.
  • this static switching circuit is as follows: When an alternating voltage exists across the AC power supply line terminals 8 and 9, the primary winding N7 of transformer T2 is energised, and a voltage which is arranged to be commensurate with the voltage of the battery B is developed across the secondary winding N6 of transformer T2.
  • point 7 is effectively connected through resistor R1, controlled rectifier CR, through resistor R2 and winding N6 to battery negative, point 2, thus causing the inverter lNV to operate and to remain operating until AC power is restored to terminals 8 and 9.
  • the current which flows through the controlled rectifier CR from its anode to cathode is equal to the sum of the base currents of transistors Q1 and Q2 and is, of course, less than the total current delivered by the battery B to the inverter INV.
  • This switch can conveniently be of the double pole type, having its second pole connected in the AC power supply line to one tenninal of the ballast BAL at point 16 or 17, so that the same switch serves to control the regular lighting when power is available.
  • a static switching circuit has been described which senses the presence of voltage at the AC power supply terminals, 8 and 9, and when this voltage exists, inhibits operation of the inverter INV.
  • the inverter lNV operates.
  • the switching element CR needs only to be rated to carry the base drive current of transistors 01 and 02, which is approximately equal to the total current delivered by the battery B divided by the current gain of the transistors Q1 and O2. in a typical application, this current has been found to be less than one tenth of the total current delivered by the battery.
  • the power dissipated in the switching element CR is therefore less than that which would be dissipated in a switching element carrying the total current delivered by the battery, and the efi'rciency of the circuit is therefore higher and the rating and cost of both the switching element and the battery can therefore be lower.
  • the lamp FL is also connected to the output terminals, 14 and 15, of a ballast, BAL, which is of the type commonly used for such lamps.
  • BAL ballast
  • FIG. 1 a typical schematic circuit of such a ballast is shown, but this is indicative only of one particular type of ballast, and ballasts having different internal connections can be used. In some cases, additional connections may exist between the ballast and the lamp to provide power for heating filaments in the lamp for the purpose of starting and sometimes of maintaining the lamp alight.
  • the input terminals, 16 and 17, of the ballast BAL are connected to a source of AC power suitable for operation of the lamp which source can, as indicated in the diagram FIG. 1, be the same source of power as that applied to terminals 8 and 9, but not necessarily so.
  • the lamp FL When AC power is available at terminals 8 and 9, and at terminals 16 and 17, the lamp FL is alight drawing power for its operation through the ballast BAL from the AC power supply in the conventional manner.
  • a circuit exists in parallel with the lamp FL comprised of capacitor C2 in series with winding NS.
  • the reactance of capacitor C2 at the frequency of the AC power supply is so high that the current taken through capacitor C2 and winding N5 is negligibly small compared to the current taken by lamp FL, and therefore does not appreciably affect the efficiency of the lamp, nor does it adversely affect the inverter INV.
  • the lamp FL remains alight using power supplied by the battery B to the inverter INV which has been turned on by the static switching circuit herein described.
  • FIG. 1 of the diagrams refer to a switching element in the form of a controlled rectifier having gate, cathode and anode electrodes connected to points 10, 11, and 12 respectively
  • other types of semi-conductor could equally well be used such as for example, a n-p-n transistor with base, collector and emitter connected to points l0, l1 and 12 respectively.
  • transformer T2 is described and shown in FIG. 1 as having two electrically separate windings, an auto-transformer having one tapped winding could equally well be used.
  • FIG. 1 refer to half-wave rectification using one diode, D1
  • other circuits using more than one diode and providing full-wave rectification could equally well be used.
  • the components herein described can be arranged in a self-contained lighting fixture as typically illustrated in the diagram FIG. 2.
  • the inverter transistors, Q1 and 02 are mounted on a heat sink 18 which is fixed to a base 19.
  • the static switching circuit components R1, R2, R3, R4, C1, CR, D1, D2 and capacitor C2 are mounted on a component board 20 which is in turn fixed to the heat sink 18.
  • the remaining components, battery B, ballast BAL, inverter transformer T1, transformer T2 and also two lampholders 21 and 22 are fixed to the base 19.
  • FIG. 2 Whereas a fixture has been described and illustrated in FIG. 2 with reference to one lamp, and one ballast, other types of fixture which incorporate more than one lamp, possibly more than one ballast, and possibly additional functional or decorative parts such as diffusers, reflectors and so on could equally well be used.
  • An emergency lighting system for use with an electric discharge lamp including a ballast and having terminals adapted to be connected across an AC line, comprising:
  • a second circuit connected to said first circuit including a capacitor adapted to be charged from said first circuit and to back bias said switching device and prevent conduction thereof and thereby inhibit operation of said oscillator,
  • said capacitor being adapted to discharge upon failure of the AC power and being ineffective to back bias said switching device, whereby said semi-conductor device is rendered conductive and operation of said oscillator is enabled, and circuit means for connecting the output of said oscillator across the lamp and ballast.
  • time constant of said second circuit is selected to be substantially longer than a cycle of the AC power so that the charge on said capacitor is maintained at a sufficient value to back bias said semi-conductor device when AC line power is present.
  • sensing means includes a transformer connected across the AC line, a unidirectional conducting device in circuit with the secondary of said transformer and connected across said battery to provide a charging current thereto from the AC line.
  • circuit means connecting said battery to said semi-conductor device to forward bias said device upon discharge of said capacitor.
  • said oscillator is of the type having a saturating core, a load winding and feedback windings on said core and a pair of semi-conductor switching devices providing circuit paths to said load winding and switched ON and OFF by the voltage developed across said feedback windings upon saturation of said core, and said semiconductor device is in circuit with said feedback windings.
  • said oscillator includes a transformer in its output circuit, the secondary of said transformer connected in series with a capacitor across the lamp.
  • said semi-conductor device is a controlled rectifier having a gate electrode, said gate electrode being connected to the positive terminal of said battery to forward bias said device upon discharge of said capacitor.
  • a power-pack assembly connectable to an electric discharge lighting fixture having an enclosure provided with means for mounting an electric discharge lamp and containing a ballast and electrical connections for the lamp to function from an AC power supply, said assembly including AC line power sensing means, a battery, a charger for the battery, an inverter, and a switching circuit, all mounted within a casing of a size and shape for insertion into the enclosure of the lighting fixture, said assembly having connecting means for connecting it to the lamp, to the ballast and to the AC power supply, whereby the assembly supplements the fixture so that the lamp provides regular light when the AC power supply is available and continues fed by the battery automatically to provide emergency light when the AC power supply fails, said inverter comprising a free-running oscillator having a feedback circuit for sustaining oscillations, said switching circuit being connected in said feedback circuit and to sense the available AC power, said switching circuit being effective to open said feedback circuit and render said oscillator inoperative when the availability of AC power is sensed from the supply.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
US25879A 1969-04-08 1970-04-06 Emergency lighting system Expired - Lifetime US3660714A (en)

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Application Number Priority Date Filing Date Title
CA48143 1969-04-08

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US (1) US3660714A (enrdf_load_stackoverflow)
BE (1) BE748660A (enrdf_load_stackoverflow)
BR (1) BR7018120D0 (enrdf_load_stackoverflow)
CH (1) CH534973A (enrdf_load_stackoverflow)
DE (1) DE2016322B2 (enrdf_load_stackoverflow)
FR (1) FR2043033A5 (enrdf_load_stackoverflow)
GB (1) GB1304279A (enrdf_load_stackoverflow)
NL (1) NL7005025A (enrdf_load_stackoverflow)
ZA (1) ZA702330B (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3809917A (en) * 1973-06-27 1974-05-07 R Vore Emergency auxiliary circuit switch and lighting system
US4013993A (en) * 1976-03-22 1977-03-22 Westinghouse Electric Corporation Elevator system
US4056757A (en) * 1972-03-02 1977-11-01 John C. Bogue Emergency lighting system
US4454452A (en) * 1977-11-16 1984-06-12 Feldstein Robert S Emergency lighting system
US5015919A (en) * 1989-07-19 1991-05-14 Led Corporation N.V. Emergency lighting system provided with a fluorescent tube
US6628083B2 (en) 2000-04-28 2003-09-30 Pickering Associates, Inc. Central battery emergency lighting system
US7045964B1 (en) * 2004-01-13 2006-05-16 Hermans Albert L Emergency lighting system with automatic diagnostic test
CN110535225A (zh) * 2019-09-24 2019-12-03 深圳市比尔达科技有限公司 带内置分能功能的应急输出电路及应急装置
US10616970B2 (en) 2017-06-19 2020-04-07 Abl Ip Holding Llc Powering an emergency lighting system

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3435432A1 (de) * 1984-09-27 1986-04-03 Ceag Licht- Und Stromversorgungstechnik Gmbh, 4770 Soest Schaltungsanordnung zum betrieb einer entladungslampe
DE3636186A1 (de) * 1986-10-24 1988-04-28 Ceag Licht & Strom Schaltungsanordnung fuer eine notbeleuchtung
GB2248984B (en) * 1990-10-19 1994-05-04 Power Standby Systems Limited An emergency light circuit
GB2278428B (en) * 1993-05-27 1997-01-29 Albert Henry Wilbourne Lighting system
GB9617946D0 (en) * 1996-08-28 1996-10-09 Jsb Electrical Plc Power supply circuit

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Publication number Priority date Publication date Assignee Title
US3255358A (en) * 1962-06-25 1966-06-07 Kilpatrick George Wayne Auxiliary alternating current structure
US3283144A (en) * 1964-05-15 1966-11-01 Cons Electronic Equipment Comp Portable light
US3311744A (en) * 1964-08-06 1967-03-28 Richard J Weeks Light assembly
GB1079967A (en) * 1965-07-07 1967-08-16 Ass Elect Ind Improvements relating to electrical inverters
US3356891A (en) * 1965-06-02 1967-12-05 Accumulateurs Fixes Automatic substitution of a standby power source rendered operative only when the lamps are connected
US3435206A (en) * 1966-12-19 1969-03-25 Richard C Swanson Portable fluorescent lamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255358A (en) * 1962-06-25 1966-06-07 Kilpatrick George Wayne Auxiliary alternating current structure
US3283144A (en) * 1964-05-15 1966-11-01 Cons Electronic Equipment Comp Portable light
US3311744A (en) * 1964-08-06 1967-03-28 Richard J Weeks Light assembly
US3356891A (en) * 1965-06-02 1967-12-05 Accumulateurs Fixes Automatic substitution of a standby power source rendered operative only when the lamps are connected
GB1079967A (en) * 1965-07-07 1967-08-16 Ass Elect Ind Improvements relating to electrical inverters
US3435206A (en) * 1966-12-19 1969-03-25 Richard C Swanson Portable fluorescent lamp

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056757A (en) * 1972-03-02 1977-11-01 John C. Bogue Emergency lighting system
US3809917A (en) * 1973-06-27 1974-05-07 R Vore Emergency auxiliary circuit switch and lighting system
US4013993A (en) * 1976-03-22 1977-03-22 Westinghouse Electric Corporation Elevator system
US4454452A (en) * 1977-11-16 1984-06-12 Feldstein Robert S Emergency lighting system
US5015919A (en) * 1989-07-19 1991-05-14 Led Corporation N.V. Emergency lighting system provided with a fluorescent tube
US6628083B2 (en) 2000-04-28 2003-09-30 Pickering Associates, Inc. Central battery emergency lighting system
US7045964B1 (en) * 2004-01-13 2006-05-16 Hermans Albert L Emergency lighting system with automatic diagnostic test
US10616970B2 (en) 2017-06-19 2020-04-07 Abl Ip Holding Llc Powering an emergency lighting system
US10764982B2 (en) 2017-06-19 2020-09-01 Abl Ip Holding Llc Emergency lighting system with charging, standby, and emergency modes of operation
US11026311B2 (en) 2017-06-19 2021-06-01 Abl Ip Holding Llc Emergency lighting system with power rollback
US11239691B2 (en) 2017-06-19 2022-02-01 Abl Ip Holding Llc Powering an emergency lighting system
US12136849B2 (en) 2017-06-19 2024-11-05 Abl Ip Holding Llc Emergency lighting system with battery identification
CN110535225A (zh) * 2019-09-24 2019-12-03 深圳市比尔达科技有限公司 带内置分能功能的应急输出电路及应急装置
CN110535225B (zh) * 2019-09-24 2024-05-14 深圳市比尔达科技有限公司 带内置分能功能的应急输出电路及应急装置

Also Published As

Publication number Publication date
ZA702330B (en) 1971-09-29
BE748660A (fr) 1970-10-08
FR2043033A5 (enrdf_load_stackoverflow) 1971-02-12
NL7005025A (enrdf_load_stackoverflow) 1970-10-12
DE2016322B2 (de) 1974-06-12
DE2016322A1 (de) 1970-10-15
CH534973A (de) 1973-03-15
GB1304279A (enrdf_load_stackoverflow) 1973-01-24
BR7018120D0 (pt) 1973-02-20

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