GB2430555A - Electrical connection circuit - Google Patents

Electrical connection circuit Download PDF

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Publication number
GB2430555A
GB2430555A GB0701046A GB0701046A GB2430555A GB 2430555 A GB2430555 A GB 2430555A GB 0701046 A GB0701046 A GB 0701046A GB 0701046 A GB0701046 A GB 0701046A GB 2430555 A GB2430555 A GB 2430555A
Authority
GB
United Kingdom
Prior art keywords
circuit
appliance
standby mode
power supply
isolating
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.)
Granted
Application number
GB0701046A
Other versions
GB2430555C (en
GB2430555B (en
GB0701046D0 (en
Inventor
Karl Dorn
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB0701046D0 publication Critical patent/GB0701046D0/en
Publication of GB2430555A publication Critical patent/GB2430555A/en
Priority to GB0706145A priority Critical patent/GB0706145D0/en
Priority to PCT/GB2007/003076 priority patent/WO2008017877A1/en
Application granted granted Critical
Publication of GB2430555B publication Critical patent/GB2430555B/en
Priority to GB0814705A priority patent/GB2448455A/en
Publication of GB2430555C publication Critical patent/GB2430555C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/13—Modifications for switching at zero crossing
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/13—Modifications for switching at zero crossing
    • H03K17/136—Modifications for switching at zero crossing in thyristor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/30—Modifications for providing a predetermined threshold before switching
    • H03K17/305—Modifications for providing a predetermined threshold before switching in thyristor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/725—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for ac voltages or currents
    • 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

Abstract

A circuit is described for connection between an appliance and a power supply. The circuit detects when the appliance is operating in a standby mode and automatically isolates the appliance from the power source either immediately or after a predetermined length of time of operation in the standby mode. The circuit may incorporate a micro-controller 18 which measures the applied voltage after initial start up and averages it over a period of time, typically one minute; this period allows the current drawn by the appliance to reach a steady state and also enables short current spikes to be disregarded. The circuit may incorporate a triac 12.

Description

ELECTRICAL CONNECTION CIRCUIT
Field of the invention
The present invention relates to an electrical circuit for connection beLween a source of electrical power and an appliance, the circuit being capable of being incorporated in a connector such as a plug or a wall socket or within an extension lead or a power supply lead. i0
Background of the invention
Several appliances are currently designed to operate in a standby mode in which the appliance is dormant but can be is returned to a normal operating mode without the inconvenience of a warm-up period. In the case of computers, for example, having a standby mode avoids the need for cold rebooting, and therefore saves the user time and avoids inconvenience. Other appliances, such as televisions, can be returned to a normal operating mode by using an infrared remote control when they are in standby mode, which is not possible when their main ON-OFF switch is turned to the OFF position.
While having a standby mode offers advantages, such as those described above, it results in unnecessary consumption of electrical power. It is a popular misconception that appliances consume negligible electrical power when they are operating in standby mode. In reality, their power consumption is typically 85% of that during normal operation. Allowing appliances to operate in standby mode for prolonged periods is therefore hugely wasteful of energy and, having regard to current concerns about global warming, legislation is currently being considered in some countries to prohibit the provision of a standby mode in appliances manufactured in the future.
While the problem of energy wastage may be reduced in the future by modifying the design of appliances, there are currently numerous appliances in use which are left on in standby mode for prolonged periods of time, often inadvertently, resulting in unnecessarily high fuel bills to the consumer as well as harm to the environment.
Summary of the invention
With a view to mitigating the foregoing problem, the present invention in its broadest aspect provides a circuit for connection between an appliance and a power supply, which circuit includes means for detecting when the appliance is operating in a standby mode and means for automatically isolating the appliance from the power source either immediately or after a predetermined length of time of operation in the standby mode.
While it would possible to inhibit standby operation totally, by setting the predetermined length of time to be negligible or no more than the time taken to ascertain that the appliance is operating in a standby mode, this is not preferred as there are benefits to the user in having an appliance on standby for a short time. It is only prolonged operation in standby mode that is unjustified and likely to be unintentional.
It is therefore preferred for the circuit to incorporate a timer and for it to disconnect the appliance from the power supply only after several minutes of operation in the standby mode have lapsed.
In a preferred embodiment of the invention, the means for detecting when the appliance is operating in a standby mode includes means for sensing the current drawn by the appliance and means for determining when the current drawn from the power supply drops below a threshold.
The means for isolating the appliance from the power supply may be selfresetting. This would he suitable for any appliance which, having been disconnected from the power supply, requires its own ON-OFF switch to be turned ON before it can again be operated.
For appliances that would automatically return to a standby mode on reconnection to the power supply, it is possible for the means for isolating the appliance from the power supp]y to include a manual reset button or for it to be reset automatically if disconnected from the power supply. As a further alternative, the isolating means may be reset in response to toggling of the ON-OFF switch of the appJ iance.
The connection circuit of the invention may either be incorporated into the plug or the power lead of an appliance or it may be incorporated into a wall socket or an extension lead. If built into a plug or power lead dedicated to one appliance, the threshold level of the connection circuit can be calibrated for that appliance and will enable the appliance to be plugged into any power socket. If built into a socket, on the other hand, the connection circuit can prevent standby mode operation of any appliance plugged into it but the current threshold indicative of standby operation cannot be preset as it may vary with the appliance.
To overcome this problem, it is preferred for the connection circuit to include means for determining the maximum current drawn by an appliance after initial activation and means for setting a threshold indicative of operation in a standby mode as a predetermined fraction of the maximum sensed current.
When appliances are first switched on, their current consumption may remain high for some time until a steady state is reached. For this reason, it is preferred for the connection circuit not to rely on instantaneous measurements of appliance current but on measurements averaged over a period of time sufficiently long to ensure a reliable reading, unaffected by brief transients.
Brief description of the drawings
The invention will now be described further, by way of example, with reference to the accompanying drawing, which is a block diagram of a connector in accordance with the invention.
Detailed description of the preferred embodiment(s) The single figure shows a connection circuit having two inputs and two outputs. The two inputs are connected to the Live and Neutral of a mains supply and the two outputs lead to the Live and Neutral inputs of the appliance, which requires no internal modification. The illustrated circuit can be quite small physically and can therefore be built into the mains supply lead of the appliance or into the plug fitted to the mains supply lead. As a further alternative, the circuit can be built into a mains wall socket or into an extension lead.
Within the circuit of the invention, there is an uninterrupted connection between the Neutral input and output terminals whereas a resistor 10 and an electronic switch 12 are arranged in series with one another in the connection between the input and output Live terminals. The switch 12 is shown as being a triac but other forms of switch or relay may alternatively be used.
A DC power supply circuit 14 connected across the mains supply serves to provide reference Ov and 5v DC rails which are required for other components to be described below. To avoid the need for a transformer, the DC supply circuit may simply comprise a Zener diode and a smoothing circuit.
As the resistor 10 is connected in series with the appliance, the voltage developed across it is a measure of the current drawn by the appliance. This voltage is amplified by an amplifier 16 and supplied to a voltage sensing input of a PIC12F675 micro-controller 18 which sends a control siqnal to the triac 12 by way of a resistor 20.
The micro-controller 18 is a small computer which can be pre-programsned to perform certain tasks, as described below, and includes, in addition to a processor, E-PROM memory to hold the instruction program and random access memory.
One of the inputs of the micro-controller 18 is connected to the Neutral line of the mains supply and serves to detect zero crossings. This information is used for initial powering up of the circuit to send a signal to the triac 20 over the resistor 20, to render the triac 12 conductive, the signal being timed relative to a zero crossing of the mains voltage. This output of the micro- controller remains in a high state for as long as power is to be supplied to the appliance and its return to a low state will result in the triac 12 being switched off to isolate the appliance from the mains supply.
While current is drawn from the mains supply, a voltage proportional to the current drawn by the appliance is developed across the resistor 10. The resistor 10 needs to have a low value of resistance and the voltage drop across it is also small. For this reason, it is amplified by the amplifier 16 before being applied to the micro-controller 18. The micro-controller 18 after initial power up measures the applied voltage and averages it over a period of typically one minute. This period allows the current drawn by the appliance to reach a steady state and also enables short current spikes to be disregarded. This average is then stored in memory and used as the reference for the current consumed by the appliance during normal operation.
When at some time later the appliance is switched to s operate in a standby mode, current will continue to flow through the resistor 10 but the value of the measured current will drop to a fraction of the stored steady state value for normal operation. Once again, it is not desirable to act on instantaneous measurements of the drawn current and it is averaged for a period of typically a minute to produce a steady state current reading. if this readinq is below a certain threshold, typically 85% of the normal operation current, then the micro-controller generates a flag to indicate that standby operation has been detected.
It is possible to act on this flag to switch off the triac 12 without delay but it is preferred to permit standby mode to be used for a reasonable length of time, say thirty minutes. The flag therefore initiates a count of clock pulses which continues until a maximum count is reached or until the flag is cleared by the operator resuming normal operation of the appliance. If the maximum count is reached, corresponding to the lapsing of a maximum period of operation in standby mode, the output of the micro- controller 18 goes low to switch off the triac 12 and isolate the appliance from the mains supply.
The described connection circuit is intended to be incorporated into a plug or a main supply lead of an appliance. Once the appliance has been disconnected, the circuit can be reset by disconnecting the mains supply from the input side of the circuit. This can be done either by pulling the plug out of the wall socket or operating a switch on the wall socket. If the appliance is one that remains in an OFF state once the power supply to it has been discontinued, the circuit can be modified to reset itself after it has been triggered by a period of operation in standby mode.
If the circuit is built into a wall socket, it is not possible to disconnect the mains supply from its input side and in this case it s possible to provide a manual reset button.
The triac 12 could alternatively be controlled using a o small burst fire following the mains zero crossing but such an approach may prove problematic in view of the non-uniform current drawn by some appliances. To overcome this issue the triac gate in the described preferred embodiment of the invention is driven continuously, which places a substantial i5 current burden on the transformer-less power supply unit 14 and makes redundant the need to monitor the mains for zero- crossing. If desired, an opto-isolated triac driver may be used with built-in zero-crossing detection such as the M0N3043-M.
If desired, a small LED may be used to indicate when the connection circuit has removed the power to the appliance. This could periodically flash to inform the user of the system status and would also make the device easier to locate to activate a soft reset if the circuit is fitted with a reset button.

Claims (10)

1. A circuit for connection between an appliance and a power supply, comprising means for detecting when the appliance is operating in a standby mode and means for automatically isolating the appliance from the power source either immediately or after a predetermined length of time of operation in the standby mode.
2. A circuit as claimed in claim 1, wherein the circuit includes a timer and is operative to disconnect the appliance from the power supply only after several minutes of operation in the standby mode have lapsed.
3. A circuit as claimed in claim 1 or 2, wherein the means for detecting when the appliance is operating in a standby mode includes means for sensing the current drawn by the appliance and means for determining when the current drawn from the power supply drops below a threshold.
4. A circuit as claimed in any one of the preceding claims, wherein the means for isolating the appliance from the power supply is self-resetting.
5. A circuit as claimed in any one of claims 1 to 3, wherein the means for isolating the appliance from the power supply includes a manual reset button.
6. A circuit as claimed in any one of claims 1 to 3, wherein the means for isolating the appliance from the power supply includes means for automatically resetting the isolating means when the circuit is disconnected from the power supply.
7. A circuit as claimed in any one of the preceding claim, wherein the circuit is built into a plug or a power lead of an appliance or into an extension lead.
8. A circuit as claimed in any one of claims 1 to 6, wherein the circuit is built into a wall socket.
9. A circuit as claimed in any one of the preceding s claims, wherein the connection circuit include means for determining the maximum steady current drawn by an appliance after iniLial activation and means for setting a threshold indicative of operation in a standby mode as a predetermined fraction of the maximum sensed steady current.
10. A circuit constructed and adapted to operate substantially as herein described with reference to and as illustrated in the accompanying drawing.
GB0701046A 2006-08-11 2007-01-19 Electrical connection circuit Expired - Fee Related GB2430555C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0706145A GB0706145D0 (en) 2006-08-11 2007-03-30 Electrical Connection Circuit
PCT/GB2007/003076 WO2008017877A1 (en) 2006-08-11 2007-08-10 Electrical connection circuit
GB0814705A GB2448455A (en) 2006-08-11 2008-08-12 Electrical connection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB0616019.6A GB0616019D0 (en) 2006-08-11 2006-08-11 Standby plug

Publications (4)

Publication Number Publication Date
GB0701046D0 GB0701046D0 (en) 2007-02-28
GB2430555A true GB2430555A (en) 2007-03-28
GB2430555B GB2430555B (en) 2007-08-22
GB2430555C GB2430555C (en) 2012-05-30

Family

ID=37056230

Family Applications (3)

Application Number Title Priority Date Filing Date
GBGB0616019.6A Ceased GB0616019D0 (en) 2006-08-11 2006-08-11 Standby plug
GB0701046A Expired - Fee Related GB2430555C (en) 2006-08-11 2007-01-19 Electrical connection circuit
GB0814705A Withdrawn GB2448455A (en) 2006-08-11 2008-08-12 Electrical connection circuit

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB0616019.6A Ceased GB0616019D0 (en) 2006-08-11 2006-08-11 Standby plug

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0814705A Withdrawn GB2448455A (en) 2006-08-11 2008-08-12 Electrical connection circuit

Country Status (1)

Country Link
GB (3) GB0616019D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008119997A1 (en) * 2007-04-02 2008-10-09 Acorn Capital Holdings Ltd Power saving circuit
DE102007019894A1 (en) * 2007-04-27 2008-11-06 Abb Ag Power socket for power supply of electrical consumers taking place at 230 volts-mains power supply, has standby interruption and series connection of current measuring device and switching device
GB2449149A (en) * 2007-03-30 2008-11-12 Karl Dorn Standby switcher
EP2051379A1 (en) * 2007-10-16 2009-04-22 Vestel Elektronik Sanayi ve Ticaret A.S. Intelligent home automation system providing power saving In standby mode
EP2157495A1 (en) * 2007-05-18 2010-02-24 Good For Yor Good For The Planet, S.L. Method and system for detection of standby status in linear and non-linear charges connected to the electricity mains and automatic disconnection thereof
GB2464293A (en) * 2008-10-09 2010-04-14 Timothy Paul Jarvis An automatic switching apparatus
GB2558180A (en) * 2016-07-19 2018-07-11 Charles Tendai Nenguke Gadgetmaster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110095728A1 (en) 2009-10-28 2011-04-28 Superior Communications, Inc. Method and apparatus for recharging batteries in a more efficient manner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231581A1 (en) * 1981-09-17 1983-03-31 Siemens AG, 1000 Berlin und 8000 München Method for switching-off the standby mode of a television receiver
JP2000078751A (en) * 1998-08-26 2000-03-14 Canon Inc Power saving electronic apparatus
JP2000152499A (en) * 1998-09-07 2000-05-30 Takatoshi Kosaka Automatic power breaker for home electronic product
JP2002186178A (en) * 2000-12-18 2002-06-28 Neo Techno:Kk Power supply unit for electrical apparatus
US20060273663A1 (en) * 2005-06-02 2006-12-07 Bradley Emalfarb Power outlet with automatic shutoff

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3826614B2 (en) * 1999-04-14 2006-09-27 セイコーエプソン株式会社 Switching power supply and peripheral equipment
JP4173115B2 (en) * 2004-02-27 2008-10-29 松下電器産業株式会社 Switching power supply control semiconductor device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3231581A1 (en) * 1981-09-17 1983-03-31 Siemens AG, 1000 Berlin und 8000 München Method for switching-off the standby mode of a television receiver
JP2000078751A (en) * 1998-08-26 2000-03-14 Canon Inc Power saving electronic apparatus
JP2000152499A (en) * 1998-09-07 2000-05-30 Takatoshi Kosaka Automatic power breaker for home electronic product
JP2002186178A (en) * 2000-12-18 2002-06-28 Neo Techno:Kk Power supply unit for electrical apparatus
US20060273663A1 (en) * 2005-06-02 2006-12-07 Bradley Emalfarb Power outlet with automatic shutoff

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2449149A (en) * 2007-03-30 2008-11-12 Karl Dorn Standby switcher
WO2008119997A1 (en) * 2007-04-02 2008-10-09 Acorn Capital Holdings Ltd Power saving circuit
DE102007019894A1 (en) * 2007-04-27 2008-11-06 Abb Ag Power socket for power supply of electrical consumers taking place at 230 volts-mains power supply, has standby interruption and series connection of current measuring device and switching device
EP2157495A1 (en) * 2007-05-18 2010-02-24 Good For Yor Good For The Planet, S.L. Method and system for detection of standby status in linear and non-linear charges connected to the electricity mains and automatic disconnection thereof
EP2157495A4 (en) * 2007-05-18 2013-02-06 Good For You Good For The Planet S L Method and system for detection of standby status in linear and non-linear charges connected to the electricity mains and automatic disconnection thereof
EP2051379A1 (en) * 2007-10-16 2009-04-22 Vestel Elektronik Sanayi ve Ticaret A.S. Intelligent home automation system providing power saving In standby mode
GB2464293A (en) * 2008-10-09 2010-04-14 Timothy Paul Jarvis An automatic switching apparatus
GB2558180A (en) * 2016-07-19 2018-07-11 Charles Tendai Nenguke Gadgetmaster

Also Published As

Publication number Publication date
GB2430555C (en) 2012-05-30
GB2430555B (en) 2007-08-22
GB0701046D0 (en) 2007-02-28
GB0814705D0 (en) 2008-09-17
GB2448455A (en) 2008-10-15
GB0616019D0 (en) 2006-09-20

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
S27 Amendment of specification after grant (sect. 27/patents act 1977)

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