Elimination of power consumption when charger/adaptor is not in use
First Claim
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1. A charger or power source for an appliance, which appliance is energized or charged by application of voltage to the appliance, said charger or power source comprising:
- a power mains socket having contacts for connecting the charger or power source to a power mains plug electrically connected to a power mains;
a transformer having a primary winding and a secondary winding, and an electrical connection between a first side of the primary winding and a first power mains socket contact;
an appliance socket having contacts for connecting the secondary winding of the transformer to an appliance plug,wherein an electrical connection between a second power mains socket contact and a second side of the primary winding is routed through said appliance socket and said appliance plug such that the primary winding of the transformer cannot be energized unless the appliance plug is coupled to the appliance socket.
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Abstract
A plug-and-socket arrangement connects an appliance to a mains-powered battery charger/power supply. To avoid unwanted power consumption when the appliance is disconnected from the charger/power supply, the plug-and-socket arrangement disconnects the mains power from the battery charger/power supply when the appliance plug is disconnected from the appliance socket.
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Citations
20 Claims
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1. A charger or power source for an appliance, which appliance is energized or charged by application of voltage to the appliance, said charger or power source comprising:
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a power mains socket having contacts for connecting the charger or power source to a power mains plug electrically connected to a power mains; a transformer having a primary winding and a secondary winding, and an electrical connection between a first side of the primary winding and a first power mains socket contact; an appliance socket having contacts for connecting the secondary winding of the transformer to an appliance plug, wherein an electrical connection between a second power mains socket contact and a second side of the primary winding is routed through said appliance socket and said appliance plug such that the primary winding of the transformer cannot be energized unless the appliance plug is coupled to the appliance socket. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A charger or power source for an appliance, which appliance is energized or charged by application of voltage to the appliance, said charger or power source comprising:
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a transformer having a primary winding for generating secondary winding power when said primary winding of said transformer is energized from an alternating-current power mains, a power mains socket having contacts for connecting the charger or power source to a power mains plug, including a first power mains socket contact that is electrically connected with a first side of the primary winding; and an appliance socket having contacts for connecting the charger or power source to an appliance plug, including a first appliance socket contact that is electrically connected to a first side of the secondary winding, a second appliance socket contact that is electrically connected with a second side of the primary winding and a second side of the secondary winding, and a third appliance socket contact that is electrically connected to a second power mains socket contact; wherein, if a mains plug is coupled to the mains socket, the primary side of the transformer is not energized unless the appliance plug is coupled to said appliance socket, said appliance plug having a first, second, and third appliance plug contacts corresponding to the first, second, and third appliance socket contacts, and said appliance plug having an electrical connection between the second and third appliance plug contacts. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A charger or power source for an appliance, which appliance is energized or charged by application of voltage across first and second appliance electrodes, said charger or power source comprising:
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a housing containing a transformer, said transformer including a primary winding defining first and second electrodes, for generating secondary power when said first and second electrodes of said primary winding of said transformer are energized from alternating-current power mains, said housing also including at least one contact adapted to be connected to one side of said power mains, said housing also including an appliance socket of a plug-and-socket arrangement, said appliance socket also including at least first, second, and third contacts, said first contact of said appliance socket being coupled to a secondary winding of said transformer for, when said transformer is energized, generating said voltage and applying said voltage to said first contact of said appliance socket, said second contact of said appliance socket being connected to said second electrode of said primary winding of said transformer, said third contact of said appliance socket being connected to said one contact of said housing whereby, when said one contact is connected to said one side of said power mains and said first electrode of said primary winding of said transformer is connected to the other side of said power mains, said one side of said power mains is also connected to said third contact of said appliance socket and said transformer is energized, an appliance plug of said plug-and-socket arrangement, said appliance plug also including at least first, second, and third contacts, which first, second, and third contacts mate with said first, second, and third contacts of said appliance socket, respectively, when said plug-and-socket are mated, said first contact of said appliance plug being connected to said first electrode of said appliance, said second contact of said appliance plug being connected to said third contact of said appliance plug, whereby, when said appliance socket and said appliance plug are mated, said one side of said power mains is connected to said second electrode of said primary winding of said transformer, for generating and applying said voltage to said appliance. - View Dependent Claims (18, 19, 20)
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Specification