GB2155708A - Electrical devices - Google Patents

Electrical devices Download PDF

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Publication number
GB2155708A
GB2155708A GB8504620A GB8504620A GB2155708A GB 2155708 A GB2155708 A GB 2155708A GB 8504620 A GB8504620 A GB 8504620A GB 8504620 A GB8504620 A GB 8504620A GB 2155708 A GB2155708 A GB 2155708A
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GB
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Patent type
Prior art keywords
device
light
circuitry
alarm
mode
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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.)
Granted
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GB8504620A
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GB8504620D0 (en )
GB2155708B (en )
Inventor
Colin Robert Francis
Wojciech Witold Giller
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Colin Robert Francis
Wojciech Witold Giller
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Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00Alarms responsive to unspecified undesired or abnormal conditions
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0017Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit
    • H02J13/002Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with direct transmission between the control or monitoring unit and the controlled or monitored unit using the power network as support for the transmission
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0079Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with transmission using an intermediate treatment level between the control or monitoring unit and the controlled or monitored unit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/0006Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks
    • H02J13/0013Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit
    • H02J13/0086Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network for single frequency AC networks characterised by transmission structure between the control or monitoring unit and the controlled or monitored unit with transmission using plurality of intermediate treatment level between the control or monitoring unit and the controlled or monitored unit
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B37/00Circuit arrangements for electric light sources in general
    • H05B37/02Controlling
    • H05B37/0209Controlling the instant of the ignition or of the extinction
    • H05B37/0281Controlling the instant of the ignition or of the extinction by timing means
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/40Control techniques providing energy savings
    • Y02B20/42Control techniques providing energy savings based on timing means or schedule

Abstract

A device (1) (Figure 1) interposed between a lamp and its socket provides a variety of purposes including control of the operation of the lamp, hazard and security status detection. In Figure 2, if the light switch is turned on and left on the lamp B is operated normally. If the switch is toggled off then back on again within a predetermined period, the device operates to periodically energise the lamp to give the impression that the premises are occupied. In a nightlight arrangement, the device energises the lamp at reduced power in response to toggling of the switch (Figure 3); the device may also cause tunes to be played for a predetermined period after the nightlight mode is activated (Figure 4). In other embodiments the device includes a smoke, fire, or intruder detector which is rendered operative in response to toggling of the light switch (Figures 5 to 8). An energy conservation system is also disclosed (Figure 9) in which selected lamps are turned off as the ambient light level falls to various levels. Selected ones of a multiplicity of lamps may each be controlled by circuitry contained in a device located between the lamp and its socket, the device receiving command signals via an infra-red or mains carrier transmission system. <IMAGE>

Description

SPECIFICATION Electrical devices The present invention relates to a electrical device and, more specifically, to electrical devices which perform control and/or monitoring/alarm functions.

According to a first aspect of the invention, there is provided an electrical device comprising a body adapted to be interposed between a light and light socket, the body containing electronic circuitry having a number of operating modes and including means for determining the operation mode on the basis of the pattern of energisation of the device by the main supply delivered in use via said socket. The various operating modes may be modes of operation of the light and/or modes in which other functions are activated.

In one application of this aspect of the invention, the circuitry may, in one mode of operation, permit the light to be operated as normal by a wall switch and in another mode, may periodically energise the light so as, for example, to give the appearance that premises in which the device is installed are occupied.

As mentioned above, the circuitry may control operation of the light, for example to energise it in one mode at full power, and, in another mode, at reduced power; one application of this concept is the provision of a remote-controlled nightlight. In those circumstances, the circuitry may be arranged to provide an audible output, this being used to play the music of a nursery rhyme or to emit some other reassuring and/or soothing noise for a period after the nightlight mode is activated.

According to a second aspect of the invention.

there is provided an electrical device comprising a body adapted to be interposed between a light and a light socket, the device containing circuitry for monitoring a security condition or hazzard condition in the environment in which the device is located. In this and/or the first aspect of the invention, the device may houses a fire, gas or smoke detector and the circuitry be arranged to provide a signal exteriorly of the device when fire or smoke is detected; the detector may be sensitive to a particular gas or gases so that, for example, the device can be used to detect the presence of poisonous or otherwise dangerous gases in the atmosphere.

In accordance with the third aspect of the invention, there is provided a system for controlling the illumination of an environment comprising a monitoring device for monitoring ambient light levels at one or more locations in an environment with an artificial lighting requirement and at least one control device which in use is remote from the monitoring device and includes circuitry arranged to control the level of energisation of a light or lights with which it is associated in accordance with a control signal transmitted by the monitoring device.

Thus, the circuitry may be arranged to control the level of energisation of the light with which it is associated with a view to economising on electrical consumption. In accordance with this aspect of the invention, it is proposed that a control system comprising a device for monitoring ambient light levels at one or more locations in an environment with an artificial lighting requirement (such as a shop interior, office or factory workshop) be provided together with a number of control devices individually associated with respective lamps, the monitoring device transmitting control signals to the devices in accordance with the daylight available and ambient level lighting requirements.

The monitoring device may further be arranged to record or display the saving in consumption as compared with that which would occur in the absence of the devices.

Considering the various aspects of the invention generally, where the device is providing a detecting function, the device may be used in association with a remote alarm or relay device or similar to which it transmits signals in any one of a number of suitable ways, for example, by an infra red transmitter/ receiver link or by signals modulated onto the mains waveform at the detector and transmitted via the mains wiring to the remote device. According to the particular application in question, this remote device may serve a number of functions, for example providing visual and audible warnings e.g.

by operating conventional fire alarm devices and/or to transmit the state of the monitored condition or an alarm signal to a location off site e.g., by use of an automatic telephone dialler.

Where, in any of the aspects of the invention it is desired to have the device operable in a number of modes (for example in the nightlight in case it is desirable to have a night light mode of operation and a conventional mode of operation whereby the light acts as an ordinary indoor light), the device may contain circuitry to facilitate the change in mode without having to provide additional wiring or devices to control the device. Thus, for example, the circuitry may comprise circuitry responsive to the presence of a mains voltage applied to the device for selecting the mode of operation, for example the desired mode of operation may be initiated by turning the light switch associated with a light socket on, then briefly off then on again, the circuitry responding to this sequence to set up the desired mode of operation.

Thus a sixth aspect of the invention provides an electrical device having means for monitoring a mains supply and for producing an output signal, when a predetermined pattern of "on" and "off" periods of the main supply occurs, to effect a change of mode of operation of the device.

The invention will be further described by way of example with reference to the accompanying drawings in which: Figure lisa schematic sectional view of the housing of the device used in the embodiments of Figures 2 to 9; Figure 2 is a schematic block diagram of a security system incorporating a first embodiment of the present invention; Figure 3 is a schematic block diagram of a nightlight incorporating a second embodiment of the present invention; Figure 4 is a schematic block diagram of a nightlight incorporating a third embodiment of the present invention; Figures 5 and 6A and 6B is a schematic block diagram of a fire alarm incorporating a fourth embodiment of the present invention; Figure 7 is a schematic block diagram of a fire detection system icorporating a fifth embodiment of the present invention;; Figure 8 is a schematic block diagram of a fire alarm system incorporating a sixth embodiment of the present invention; Figure 9 is a schematic block diagram of a lighting control system incorporating a seventh embodiment of the present invention; Figure 1 shows in section the housing used in the devices of Figure 2 to 9. The housing comprises a body 1 of, say, plastics material having, at one end, a standard bulb fitting 2 such as a bayonet and at its other end a corresponding socket 3 whereby the device may be interposed between an existing light bulb and socket. The device is preferably of relatively short length so that it does not place the bulb so far forward as to contact any cover or the like with which the bulb may be provided.The device 1 incorporates a circuit board 4 incorporating circuitry 10 which, in some embodiments, controls the energization of a bulb B placed in the socket 3, while in others it performs other functions.

Figure 1 shows in section 1 embodiment of the present invention for use as a security device.

Briefly, the function of the device 1 is as follows:- 1. If the mains switch controlling the socket into which the device 1 is plugged is switched on and left on, the bulb in the socket 3 comes on and stays on -in other words the presence of the device has no effect on the control of the bulb by the light switch.

2. If the mains switch is turned off and then turned straight back on in, say, less than a second or so, a second mode of operation occurs. In this mode, if the ambient light level, as sensed by an ambient light sensor 12 in the device is below a predetermined level the device 1 initiates a cycling energization of the bulb intended to imitate the intermittent turning on and off of the light as might be expected to occur if the premises in which the device is installed were occupied. Thus, for example, the light may cyclically come on for say, about 10 minutes to.

This cycling operation continues until either (a) the device is disarmed by turning the light switch off or (b) the ambient light level exceeds the threshold of the sensor 12 so that the light does not cycle in daylight. Other arming sequences are possible.

Figure 2 shows in block form the circuitry required to achieve the desired mode of operation. As will be readily apparent to those skilled in the art, any one of a number of circuit configurations could be used to achieve the desired modes of operation and so Figure 2 is merely iilustrative of the general principle. The circuitry 10 comprises a controlled conduction element such as a triac 11 which controls the conduction path to the bulb B via the socket 3. The triac 11 is controlled by circuitry 13 energized by a low voltage D.C. power supply 14 connected across the mains inlet at the bayonet fitting 2.

Circuitry 13 includes a cycle timer 15 defining the desired on and off periods of energization of the bulb B in the "security" mode of operation and an ambient light sensing circuit 12 which may, for example, include a photodiode, phototransistor, light dependent resistor or any other suitable device which monitors the ambient light level (during periods when the bulb is not energised) and serves to disable the timer or override its function, and prevents the bulb B being turned on extinguished when the ambient light level exceeds a predetermined value so that the security mode of operation does not occur in daylight.

An initiate-security-modes sensor circuit 16 effectively monitors the state of the on/off switch associated with the light fitting either by monitoring the A.C. input directly or the D.C. output of the power supply and is arranged to trigger 2 or enable the timer module 15 when the light switch is operated through the arming sequence (i.e. turned off and then rapidly turned on again).

Figure 3 shows in block form the circuit diagram of a second embodiment of the invention for use as a "night light" in, say, childrens' bedrooms. This embodiment operates in two modes, a normal mode initiated by switching the light switch on and leaving it on - in this mode the bulb operates at full power - and a second, "night light mode", initiated by turning the light switch off briefly and then on again and in which a power controller 20 which controls the operation ofthetriac 11 causing the bulb to operate as a night light at a lower power.

Again, this special mode of operation can be cancelled by turning the light switch off the light switch. It will be seen from Figure 3 that the ambient light sensing circuit 12 of the Figure 1 embodiment has been omitted and the timer module replaced by the power control module. Preferably the power control module 17 and triac 11 oerate in a manner which is such that in the low power "night light" mode the circuitry does not inject any substantial interference back into the main supply. Operating the triac in the conventional phase control mode, with a retarded turn-on phase angle to reduce the output power of the bulb, this interference suppression may be achieved in the conventional manner with a passive component such as an inductor.

Figure 4 shows a variant of the nightlight of Figure 3.

As in the earlier version, the device 40 contains a mains interrupt sensor 41 which is arranged to detect a predetermined switching pattern of the mains supply, e.g. as in the above described embodiments, that caused by timing the lamp on, then briefly off (say for 0.5 sec) and then on again.

On detection of this sequence the associated lamp L goes from normal operation to nightlight operation at, say, 50% power.

The power to the lamp is controlled by a circuit 42 responsive to detection of the arming sequence by the sensor circuit 41, circuit 42 may include a phase controlled triac orthyristor.

Also activated by the sensor 41 is a timer 43 which activates sound generator 44 for a predetermined period after the nightlight mode commences, say, 5 to 20 minutes. The sound generator drives a small loudspeaker 45 within the device 40 and may be programmed to play the tunes of nursery rhymes or to generate some other calming or soothing noise.

In this way young or nervous children who would normally be uneasy about being left in an otherwise dark room can have sufficient illumination to provide the required level of reassurance but still be able to get to sleep comfortably without having a powerful light burning in their eyes. Figures 5 and 6A and 6B show the forms of fire or smoke detection systems incorporating devices embodying the present invention.

There are currently many smoke detection devices available which employ low drain standby current consumption from an internal battery. The life expectancy of this internal battery depends very largely on the construction of the cell having due regard for the electrolyte and the internal resistance of the cell. Relying on a battery based system is not satisfactory unless the detector is regularly checked.

Alarms intended primarily for the domestic market tend to have a rather high false alarm rate.

During the course of the day in the average home a variety of other quite normal activities can result in the detector going into alarm condition e.g. cooking, painting and entertaining. In general this problem is not one of location of the detector, for plainiy it is monitoring the air and it works. Neither is it one of sensitivity for there is an atmospheric change to be detected.

Additionally the detector, whilst active during the time that the household is most vulnerable is unable to arouse the sleeping occupants because the warning note from the detector is usually required to pass through at least one closed door on its way to the sleeper. Installations in H otels and Guest Houses are required to have bells or warning devices which are clearly audible from the inside of each individual hotel room with all the corridor fire doors closed and the room door secured.

The embodiment of the invention shown in Figure 5 used a detector in accordance with the present invention in a fire alarm system also comprising a number of receiver/alarm units 51.

The device 50 is fitted into light socket 52 after removal of the lamp 53 from the holder of the ceiling fitting in which it is to be used and the lamp 53 is then replaced.

The circuitry in device 50 is so arranged that when the fire detection function is not required, the lamp can be operated normally from the existing wall switch 54. The circuitry 101 (Fig. 6A) within the device 50 includes a circuit 102 for monitoring the incoming mains supply and a circuit 103 for deriving low voltage DC for use by the device 50 and for controlling the AC mains voltage applied to the bulb 53. In the normal, non-detection mode, the circuit 103 permits the mains supply to the bulb 53 to be controlled by the wall switch 54. To activate the detection mode, the user operates the wall switch 54 so that the bulb 53, assuming it is already switched on, is rapidly switched off then on again.This would normally be done by the last person retiring that evening and the circuit 102 is suitably designed to detect this switching pattern of the incoming mains and, in response to detecting it, to enter the detection mode.

The device 50 acknowledges this instruction by the circuit 102 causing an LED 104 to illuminate on the body of the device and the circuit 103 causing the lamp 53 in its holder to glow at approximately half strength.

At this point convection currents generated by the heat from the bulb 53 causes the air locally to be convected into ventilation holes (not shown in Figure 1) in the body 1 of the device 50. Once inside the air is channeled into a small conventional ionisation chamber 105 where the content of the air is examined.

In the event of the chamber 103 detecting a combustion gas content and triggering an alarm condition, this condition is not made by an on board device or sounder. Instead a circuit 106 which is a mains connected coded carrier generator produces a signal to be superimposed on the mains. This coded carrier generator or transmitter causes a small, around 2mW transmission, at approximately 250Khz to be introduced onto the mains wiring 26 to which the device is connected.

In each of the rooms occupied by the sleeping persons there is plugged one of the receivers 51.

Each of these receivers is connected to a mains socket 57 and carries an illuminating lamp 110 to indicate connection. Internally the circuitry 112 of the receiver is designed to continuously monitor the incoming mains.

When the incoming means carried the coded transmission from the detector 50, the ciruit 112 detects its occurrence and signals the circuitry 111 of the receiver to activate an alarm sounder 113.

On investigation of the cause of the alarm each of the remote bedside receivers can be reset by means of a simple low-profile button 114. the system is then active and until required again will remain quiescent. In the morning the system can be restored to normal 'no detection' working by simply switching off the light into which the detector 50 is plugged.

Thus by the single strategically placed detector, a number of separate highly audible sounders can be activated in five individual areas inside the building each with their doors shut and at some distance from the detector.

Figure 7 shows a further form of smoke or fire detector for use in applications such as hospital wards. Conventional smoke, combustion gas or similar early warning systems are extremely prone to false alarm calls due mainly to the concentrated levels of air-bourne vapourised liquids, e.g. ether, used in the normal course of the hospital's activity.

The embodiment of Figure 7 is intended to provide a single and cost-effective means of reducing problems associated with hospital-type environments.

In the system according to Figure 7 each ward and other area to be monitored is fitted with a detector transponder (70) similar to the detector 50 of Figures 5and6.

This detector 70 is used place of the normal ward monitoring equipment. In operation the system uses an ionisation chamber 71 in the detector 70 to monitor the air and vapours air bourne in that vicinity. In the event of an alarm condition being detected the system alarm control circuit 72 energises a transmitter 73 to signal the duty ward sister who would normally be in attendance of the fact. She would then investigate the cause and should the occasion demand so break the local break-glass contact to formalise a call on the house system to summon the local fire brigade.

In essence the evaluation of threat from any given alarm wouold be the duty of the ward sister or staff nurse and the decision as to whether or not to call the local services would be her responsibility.

In responding to the alarm warning the duty sister would be required to acknowledge receipt of the call by depressing a button within a specified period of time, failing which the secondary system would automatically default to a normal main alarm alert.

The system of signalling to the duty sister would be by means of either a mains transponder 74 (as in Figures 5 and 6, an induction loop transmitter 75, an infra-red transmitter 76 or a similar device to activate a corresponding receiver (74', 75' 76') which whe would normally be expected to carry about her person.

On signalling of an alarm condition, a timer 49 is activated and unless the condition is cancelled by the nurse pressing a cancel button 77 or similar arrangement before the timer times out a signal is sent via line 78 to the main alarm system capable of signalling direct to the emergency services.

In this manner all alarms would be dealt with locally and the incidence of false alarm virtually eradicated. Only genuine emergencies would result in the attendance of the emergency services but with the safety override that should an emergency crop up where the sister was completely occupied coping with it and either unable or forgetful to call for assistance then the system would automatically do so when the timer 79 times out at the expiry of the response period.

Figure 8 shows a security alarm system incorporating a device 80 according to the present invention and intended to provide a low cost userinstallable system generally for use in a wide range of operational conditions.

The user installs the device 80 into a lamp socket nearest to the desired point of exit from the premises and inserts the previously removed bulb into the socket 81. On leaving the protected premises, to arm the device the owner switches on the lamp by using the normal wall switch then turns it briefly off, then on again. This switching pattern is detected buy a mains interrupt sensor circuit 82 which activates an alarm module 83 which responds by emitting an audible note for say, 25 seconds during which time the owner vacates the premises; The alarm module incorporates a timer circuit to define this delay. When, at the end of this 25 second period the timer circuit times out alarm module goes automatically into the guard mode.In the device 80, a security condition sensor 84 such as a conventional infra-red motion detector monitors the security condition. If at any time during operation the detector detects an abnormal security condition e.g. movement is detected, the alarm module 83 waits, say, 25 seconds and then triggers into operation an alarm signal transmitter 85 which may, as shown be a mains carrier transmitter which injects a high frequency coded signal onto the mains supply via the devices power supply unit.

This signal is picked up by a remote alarm unit 180 which may be plugged into a mains socket and which incorporates a circuit 181 to monitor the mains supply and detect and decode the alarm signal. The circuit 181 may trigger one or more alarm devices such as a bell 182, a flashing light 183 and a telephone auto dialer 184. The auto dialer may be preset or keyed to call any selected number and transmit a recorded voice message or, e.g. an electronic alarm code. The number called might well be the telephone number of the person being visited on this occasion.

Once activated the external alarm warning bell 183 will ring for a period of 30 minutes as determined by a bell timer 185 and then re-set automatically. The bell 183 may be located within the unit 180 or, more usually, befitted exteriortothe premises.

On his return the owner entering through the front door will pass into the protected area and immediately initiate the warning tone. He will then have 25 seconds to disarm the system. One way that the device 50 can be arranged to achieve this is to design the circuitry so that switching off the lamp for approximately ten seconds causes the device to cancel any alarm about to be triggered and cause the lamp to revert two normal operation. If desired the lamps switch could be key operated to provide a greater measure of security. a variety of supplementary devices could be introduced into the controlled network giving even wider domestic protection. For example additional detectors on doors or windows intruder motion detectors in other remote areas. Specific asset protection could be provided e.g. for paintings, cups, medals, items of sentimental value, even drawers or wardrobes.

With other sensors a fire hazard warning could be introduced with an alternative telephone message or differing external warning note or flashing sign expansion.

Figure 9 shows a system for economising on the electricity consumption of interior lighting.

Particularly in the case of shops and stores, the lighting in operation is frequently in excess of the minimum necessary to maintain the required lighting levels, principally because of the time and effort which would be required to turn lights on and off as required manually. The system of Figure 9 is intended to carry out this control automatically and thereby make it possible to maintain a desired lighting level with the minimum use of electric lights. In the case of an installation where say 20kw of energy was normally being consumed to illuminate the ground floor of a large department store it might well be possible to extinguish in the region of 25% of the lighting input or (i.e. reduce the power by 5KW) without noticable degradation in lighting or detriment to the users or staff of the store.It is possible to design-into the illustrated system controlling factors which will at all times maintain the minimum levels required by the various regulators and of course levels required to maintain sales interest and safety to customers.

With a 25% saving of the load on one floor of approximately 20kw, the effective saving is in the region of 5kw per hour. This multiplied over several floors of a very large department store could might achieve a saving during the summer or on normally bright periods amounting to as much as 20 or 30kw measured over several hours in any one day. Even at industrial supply rates a saving of this order during a average period of three hours daily over six working days will soon become considerable amount of units. Prior to installation of the system a survey should be carried out of the present peak and desirable lighting conditions. Having identified lights suitable for control, a control, a control device 90 is then installed on each of the associated light fittings.The device can be in the form shown in Figure 1 and contain circuitry including a controlled conduction semiconductor element such as a thrysistor or triac to control the operation of the associated light, on a continuously variable, stepped or on/off basis. The circuitry further includes a receiver for receiving control commands from a strategically placed central control and transmitting unit 91, via an infra-red or mains carrier transmission system.

In the case of the infra-red system, the device 90 would have on its exterior in infra-red sensor oriented so as to point towards the unit 90.

The unit 90 has one or more strategically sited light sensors which continously monitor the externally available light. As predetermined levels of distributions of levels around the monitored area are reached in increment or decrementthe transmitter 93 of the device emits signals so that appropriate ones the lights under control are caused to illuminate or extinguish. This control is carried out by a suitably programmed microprocessor 94.

At all times the lights are under the control of the CPU or processor 94 which during times of saving i.e. when fittings were switched off would monitor the saving calculated in kwh and display such saving on a digital readout or display 95.

At various intervals during the year, say, to coincide with the electricity supply board measurements, the saving recorded in a non volatile memory 96 is then presented as an account which would approximate to 50% of the saving made during the period covered. The memory 96 could be a battery-backed RAM.

The savings meter could easily be installed in a position where it was always available for inspection by management or the installing company.

This type of system could readily be considered as viable in almost any office industrial or commercial environment where the client was a large user and where such saving would represent a significant sum in the premises management.

In a smaller version e.g. for domestic purposes simple lamp control could be applied without recording or displaying the cost saving.

It will be appreciated that the above embodiments are merely illustrative and that many variations are possible within the scope of the various aspects of the invention.

Details of specific circuits for carrying out the described functions in the above described embodiments have not been given since, as will be apparent to those skilled in the art many different circuits achieving the desired function could be used. For example, to provide the mains interruption detector circuit, it is possible to provide a monostable circuit with a short-term power supply (e.g. a charged capacitor) and arrange that the monostable is triggered by the mains supply (or a DC potential derived from the main supply) being interrupted and have a bistable circuit which is set if when the mains supply is reconnected, the monostable has not yet timed out. Other arrangements are possible whereby the "off time" is monitored by the progressive decline in voltage across a discharging capacitor, with the voltage remaining when the mains is reconnected determining which mode of operation the device should enter.

Claims (1)

1. An electrical device comprising a body adapted to be interposed between a light and light socket, the body containing electronic circuitry having a number of operating modes and including means for determining the operation mode on the basis of the pattern of energisation of the device by the main supply delivered in use via said socket.
2. A device according to claim 1 wherein, in one mode of operation, the circuitry controls the energisation of the light.
3. A device according to claim 1 or 2, wherein the device is operable in two modes, namely a first mode in which the light is controlled in the conventional fashion from a light switch and a second mode in which the light is operated in a predetermined fashion, the second mode being initiated by a predetermined sequence of operation of the light switch.
4. A device according to claim 2 or 3 wherein the circuitry is arranged so that in the second mode of operation it monitors the ambient light level and inhibits the energisation of the light when the ambient light level exceeds a predetermined value.
5. A device according to claim 4 wherein the circuitry is arranged to sampie the ambient light level while the light is de-energised.
6. A device according to claim 3,4 or 5, wherein the circuitry is arranged so that in a second mode of operation the circuitry will cycle the light on and off.
7. A device according to claim 6, wherein the energisation cycle of the light in the second mode imitates an average operating cycle of the light in inhabited premises.
8. A device according to any one of the preceding claims, wherein the body includes circuitry and/or other devices for carrying out a security-or hazarddetection function.
9. A device according to claim 8, wherein the means includes a smoke detector.
10. A device according to any one of claims 2 to 7, wherein the circuitry is arranged to transmit the signal as light, infra-red light whereas a signal impressed upon the mains supply waveform.
11. A device according to claim 2 wherein the circuitry includes power control circuitry for reducing the light output of the lamp in the second mode of operation.
12. A device according to claim 11, wherein the body includes a sound producing device to produce music or other reassuring noise during the second mode of operation.
13. A device according to any one of the preceding claims wherein the circuitry is arranged to detect a predetermined series of on and off periods of the main supply.
14. A device according to claim 13 wherein the second mode of operation is initiated by the mains supply being turned off for no more than a short predetermined time period and then being turned on again.
15. An electrical device comprising a body adapted to be interposed between a light and a light socket, the device containing circuitry for monitoring a security condition or hazzard condition in the environment in which the device is located.
16. A device according to claim 15, wherein the circuitry includes a smoke gas or flame detector.
17. A device according to claim 16, wherein the detector comprises an ionization chamber.
18. A device according to claim 16 or 17 wherein the circuitry is arranged to produce an alarm signal when the detector detects smoke, gas or flame in excess of a predetermined level.
19. A device according to any one of claims 15 to 18 wherein the body contains an intrusion detector.
20. A device according to claim 19, wherein the intrusion detector is a radar, ultrasonic or infra-red detector.
21. A device according to any one of claims 15 to 20 wherein the circuitry is arranged so that its operation is armed by the pattern of energisation of the mains supply to the socket.
22. A device according to claim 21, wherein the circuitry is arranged to detect a predetermined pattern of on and off periods of the mains supply.
23. A device according to any one of claims 15 to 22, wherein the device is arranged to transmit to a remote receiver a signal representative of said condition.
24. A device according to claim 23, wherein the device is arranged to transmit the signal via a light or infra-red beam or via radio.
25. A device according to claim 23 or 24 wherein the device is arranged to transmit the signal via a link comprising an induction loop.
26. A device according to claim 23, wherein the device is arranged to transmit the signal via the mains supply to said socket.
27. A device according to the claim 26, wherein the device includes a means for superimposing said signal as a high frequency signal onto the mains supply waveform.
28. A device according to any one of claims 23 to 27 in combination with at least one receiver, the or each receiver containing circuitry for detecting and responding to the security-or hazard-condition.
29. A combination according to claim 28, wherein the or each receiver contains means for generating an alarm signal.
30. A combination according to claim 29, wherein the alarm signal generating means includes an automatic telephone dialer for setting up a telephone call to send an alarm message.
31. A combination according to claim 28 or 29, wherein the or each receiver includes a timing arrangement adapted to be set into operation on detection of a security or hazard condition, means for generating a personai alarm signal to alert a user of the condition and means for generating an alternative alarm signal after a period determined by the timing arrangement if the user has not responded to the personal alarm.
32. A combination according to claim 31, wherein the alternative alarm signal is a general alarm.
34. A system for controlling the illumination of an environment comprising a monitoring device for monitoring ambient light levels at one or more locations in an environment with an artificial lighting requirement and at least one control device which in use is remote from the monitoring device and includes circuitry arranged to control the level of energisation of a light or lights with which it is associated in accordance with a control signal transmitted by the monitoring device.
35. A system according to claim 34, wherein the monitoring device is arranged to record or display the power consumption of the light(s).
36. A system according to claim 35, wherein the monitoring device is arranged to record or display the saving in power consumption of the light(s) as compared with that which would occur if the light(s) were operated without being controlled by the associated control device.
37. A system according to claim 34, 35 or 36, wherein the signal transmitted by the monitoring device is an infra-red signal.
38. A system according to claim 34, 35, 36 or 37, wherein the or each control device is in the form of a body adapted to be interposed between the associated light and its socket.
39. An electrical device according to claim 1 constructed and arranged to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
40. An electrical device according to claim 15 constructed and arranged to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
41. A system for controlling illumination constructed and arranged to operate substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
42. An electrical device having means for monitoring a mains supply and for producing an output signal, when a predetermined pattern of "on" and "off" periods of the main supply occurs to effect a change of mode of operation of the device.
GB8504620A 1984-02-24 1985-02-22 Electrical devices Expired GB2155708B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB8404914A GB8404914D0 (en) 1984-02-24 1984-02-24 Controlling operation of light
GB8416622A GB8416622D0 (en) 1984-02-24 1984-06-29 Electrical device

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GB8504620D0 GB8504620D0 (en) 1985-03-27
GB2155708A true true GB2155708A (en) 1985-09-25
GB2155708B GB2155708B (en) 1988-02-10

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GB (1) GB2155708B (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190803A (en) * 1986-05-20 1987-11-25 Yong Kin Michael Ong Light-dependent timer switching system
GB2205642A (en) * 1987-05-21 1988-12-14 Pittway Corp Infrared actuated control switch assembly
WO1989005562A1 (en) * 1987-12-08 1989-06-15 Ari Lehmusvuo Illumination control system
GB2213983A (en) * 1987-12-22 1989-08-23 Philips Electronic Associated Condition responsive electric lamp
GB2218552A (en) * 1988-04-09 1989-11-15 Lawrence Vivian Penheiro Electric light installation
GB2221331A (en) * 1988-07-28 1990-01-31 John Edward Kingston Smoke detector
WO1990002473A1 (en) * 1988-08-22 1990-03-08 Igenwert Gmbh Programmable light switch
EP0372442A2 (en) * 1988-12-08 1990-06-13 Asea Brown Boveri Aktiengesellschaft Switching device
GB2231212A (en) * 1989-05-06 1990-11-07 Charles William Lilley Lighting control system for deterring intruders
GB2234869A (en) * 1989-05-24 1991-02-13 Stephen Roger Wakefield Improved electrical switching system
GB2276049A (en) * 1992-12-18 1994-09-14 Concorde Security Syst Ltd Intruder deterrent lamp-control device
GB2281139A (en) * 1993-08-19 1995-02-22 Martyn Christopher Hill Gas detector and alarm
GB2298304A (en) * 1995-02-24 1996-08-28 Compusafe Int Ltd Theft alarm device
GB2315326A (en) * 1996-07-15 1998-01-28 Solar Wide Ind Ltd Intruder alarm
GB2319123A (en) * 1996-11-07 1998-05-13 Yat Chong Koh Apparatus for controlling AC supply switches
GB2381674A (en) * 2001-11-01 2003-05-07 Carol Brigid Gray Lamp dimmer
WO2004010395A1 (en) * 2002-07-24 2004-01-29 Evatayhow Holdings Pty Ltd Theft deterrence security system
US7024119B1 (en) 2001-11-02 2006-04-04 Genlyte Thomas Group Llc Addressable light fixture module
US7027736B1 (en) 2001-11-02 2006-04-11 Genlyte Thomas Group, Llc Addressable system for light fixture modules
EP2190268A1 (en) 2008-11-21 2010-05-26 Hendrikus Johannes Kraakman Device and method for controlling a power of several lights
WO2010062156A1 (en) * 2008-11-28 2010-06-03 Antunano San Martin Fernando Light attenuator
US7777427B2 (en) 2005-06-06 2010-08-17 Philips Solid-State Lighting Solutions, Inc. Methods and apparatus for implementing power cycle control of lighting devices based on network protocols

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB414472A (en) * 1933-04-13 1934-08-09 Henry Rottenburg Improvements in electric lamp holders
US3896334A (en) * 1973-08-15 1975-07-22 Creative Tech Corp Multiple level lamp adapter
US4023035A (en) * 1974-12-12 1977-05-10 Creative Technology Corporation Light sensitive lamp adapter
US4292546A (en) * 1980-03-06 1981-09-29 Clark Warren P Apparatus for controlling power application
EP0036666A1 (en) * 1980-03-24 1981-09-30 Teccor Electronics, Inc. Remote load selector
GB2082359A (en) * 1980-08-18 1982-03-03 Gen Electric Co Ltd Lamp-dimming system
US4334172A (en) * 1977-06-20 1982-06-08 Gte Products Corporation Adaptor for high intensity arc discharge lamps
EP0053896A1 (en) * 1980-11-28 1982-06-16 Sa Patscentre Benelux Nv Light dimmer device
EP0062004A1 (en) * 1981-03-31 1982-10-06 Giuseppe Baccanelli A device permitting of economizing electric lighting energy
EP0093408A1 (en) * 1982-04-29 1983-11-09 Bronson Potter Brightness control device
US4422018A (en) * 1981-03-06 1983-12-20 Bailey Alan S Automatic lighting disconnect timer incorporating an acoustic abort switch

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB414472A (en) * 1933-04-13 1934-08-09 Henry Rottenburg Improvements in electric lamp holders
US3896334A (en) * 1973-08-15 1975-07-22 Creative Tech Corp Multiple level lamp adapter
US4023035A (en) * 1974-12-12 1977-05-10 Creative Technology Corporation Light sensitive lamp adapter
US4334172A (en) * 1977-06-20 1982-06-08 Gte Products Corporation Adaptor for high intensity arc discharge lamps
US4292546A (en) * 1980-03-06 1981-09-29 Clark Warren P Apparatus for controlling power application
EP0036666A1 (en) * 1980-03-24 1981-09-30 Teccor Electronics, Inc. Remote load selector
GB2082359A (en) * 1980-08-18 1982-03-03 Gen Electric Co Ltd Lamp-dimming system
EP0053896A1 (en) * 1980-11-28 1982-06-16 Sa Patscentre Benelux Nv Light dimmer device
US4422018A (en) * 1981-03-06 1983-12-20 Bailey Alan S Automatic lighting disconnect timer incorporating an acoustic abort switch
EP0062004A1 (en) * 1981-03-31 1982-10-06 Giuseppe Baccanelli A device permitting of economizing electric lighting energy
EP0093408A1 (en) * 1982-04-29 1983-11-09 Bronson Potter Brightness control device

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2190803A (en) * 1986-05-20 1987-11-25 Yong Kin Michael Ong Light-dependent timer switching system
GB2205642B (en) * 1987-05-21 1991-09-11 Pittway Corp Infrared actuated control switch assembly
GB2205642A (en) * 1987-05-21 1988-12-14 Pittway Corp Infrared actuated control switch assembly
US4823051A (en) * 1987-05-21 1989-04-18 Pittway Corporation Infrared actuated control switch assembly
WO1989005562A1 (en) * 1987-12-08 1989-06-15 Ari Lehmusvuo Illumination control system
GB2213983A (en) * 1987-12-22 1989-08-23 Philips Electronic Associated Condition responsive electric lamp
GB2218552A (en) * 1988-04-09 1989-11-15 Lawrence Vivian Penheiro Electric light installation
GB2221331A (en) * 1988-07-28 1990-01-31 John Edward Kingston Smoke detector
WO1990002473A1 (en) * 1988-08-22 1990-03-08 Igenwert Gmbh Programmable light switch
EP0372442A3 (en) * 1988-12-08 1990-08-29 Asea Brown Boveri Aktiengesellschaft Switching device
EP0372442A2 (en) * 1988-12-08 1990-06-13 Asea Brown Boveri Aktiengesellschaft Switching device
GB2231212A (en) * 1989-05-06 1990-11-07 Charles William Lilley Lighting control system for deterring intruders
GB2231212B (en) * 1989-05-06 1994-03-23 Charles William Lilley A lighting circuit control system
GB2234869A (en) * 1989-05-24 1991-02-13 Stephen Roger Wakefield Improved electrical switching system
GB2234869B (en) * 1989-05-24 1994-02-16 Stephen Roger Wakefield Improved electrical switching system
GB2276049A (en) * 1992-12-18 1994-09-14 Concorde Security Syst Ltd Intruder deterrent lamp-control device
GB2281139B (en) * 1993-08-19 1996-12-18 Martyn Christopher Hill A detector
GB2281139A (en) * 1993-08-19 1995-02-22 Martyn Christopher Hill Gas detector and alarm
GB2298304A (en) * 1995-02-24 1996-08-28 Compusafe Int Ltd Theft alarm device
GB2298304B (en) * 1995-02-24 1998-07-08 Compusafe Int Ltd A monitoring device
GB2315326A (en) * 1996-07-15 1998-01-28 Solar Wide Ind Ltd Intruder alarm
GB2319123A (en) * 1996-11-07 1998-05-13 Yat Chong Koh Apparatus for controlling AC supply switches
GB2319123B (en) * 1996-11-07 2001-03-14 Yat Chong Koh Apparatus for controlling AC supply switches
US6281604B1 (en) 1996-11-07 2001-08-28 Yat Chong Koh Apparatus for controlling AC supply switches
GB2381674A (en) * 2001-11-01 2003-05-07 Carol Brigid Gray Lamp dimmer
GB2381674B (en) * 2001-11-01 2006-03-15 Lawrence George Gray Improvements in and relating to electrical controls
US7027736B1 (en) 2001-11-02 2006-04-11 Genlyte Thomas Group, Llc Addressable system for light fixture modules
US7024119B1 (en) 2001-11-02 2006-04-04 Genlyte Thomas Group Llc Addressable light fixture module
WO2004010395A1 (en) * 2002-07-24 2004-01-29 Evatayhow Holdings Pty Ltd Theft deterrence security system
US7701335B2 (en) 2002-07-24 2010-04-20 Evatayhow Holdings Pty Ltd. Theft deterrence security system
US7777427B2 (en) 2005-06-06 2010-08-17 Philips Solid-State Lighting Solutions, Inc. Methods and apparatus for implementing power cycle control of lighting devices based on network protocols
EP2190268A1 (en) 2008-11-21 2010-05-26 Hendrikus Johannes Kraakman Device and method for controlling a power of several lights
WO2010062156A1 (en) * 2008-11-28 2010-06-03 Antunano San Martin Fernando Light attenuator

Also Published As

Publication number Publication date Type
GB8504620D0 (en) 1985-03-27 grant
GB2155708B (en) 1988-02-10 grant

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