Class 307/12 - Common conductor or return type

Subclass of Class 307 - Electrical transmission or interconnection systems
Definition: Subject matter in which the plural load circuits have a
No. of patents: 36
Last issue date: 07/19/2011

Number	Title	Issue Date
7982335	Adaptive power strip An adaptive power strip has a power rail. A power entry module and one or more receptacle modules having plug receptacles are mounted on the power rail. The power entry module has a power inlet to which a source of power can be coupled. The power entry module distri...	07/19/2011
7973425	Power strip device for powering a master load and multiple slave loads A power strip device includes a power plug, a master power outlet, multiple slave power outlets and a control circuit. The control circuit includes an inductor, a reed switch and a switching circuit. Under the control of the control circuit, the power strip device a...	07/05/2011
7723862	Street light auxiliary power converter for ancillary devices A system and device for using the power provided to street and area lights or other outdoor installations to power auxiliary devices which require a power supply which is different from line voltage for their power requirements. A device adapted to be connected to t...	05/25/2010
7642671	Power supply system providing two output voltages A power supply system. The power supply system may have a power circuit having a switch and adapted to generate a first output voltage and a second output voltage, depending on the state of the switch. It also includes an output connector coupled to the power circui...	01/05/2010
7576447	Control and supply system A control and supply system for electrical devices comprises at least one voltage supply and control device above sea level, a subsea cable connecting the voltage supply and control device with the electrical devices, and a control and actuating device which is asso...	08/18/2009
7322410	Controllable production well packer An apparatus and method for operating an electrically powered device in a packer using the piping structure of the well as an electrical conductor for providing power and/or communications. The electrically powered device may comprise an electrically controllable va...	01/29/2008
7259688	Wireless reservoir production control A reservoir production control system includes a plurality of wells for producing a reservoir linked to a central computer over a downhole communication network and a surface communication network. Both the downhole and the surface communication networks are wireles...	08/21/2007
7210656	Control, sound, and operating system for model trains A model train operating, sound and control system that provides a user with increased operating realism. A novel remote control communication capability between the user and the model trains. This feature is accomplished by using a handheld remote control on which v...	05/01/2007
7175302	Year-round decorative lights with multiple strings of series-coupled bipolar bicolor LEDs for selectable holiday color schemes A decorative lighting apparatus includes a decorative light strand having first, second, and third wires, each with a plurality of lamps coupled in series therealong, and a return wire coupled to ends of the first, the second, and the third wires. Each lamp of the p...	02/13/2007
7157860	Control device for flashlight systems in airports A control for a flashlight system in an airport, includes flash units which are connected to an energy supply line and, on the output side, to respective flashlights of the flashlight system via a light cable. In order to avoid unwanted high voltages, each flash lig...	01/02/2007
6958704	Permanent downhole, wireless, two-way telemetry backbone using redundant repeaters A system and method of communicating among devices via a piping structure using at least one induction choke about the piping structure to route a time-varying current carrying communication signals between the devices. A communications system comprises a piping str...	10/25/2005
6677686	Redundant power supply system with improved reference voltage sampling at low loads An electronic system includes a common power bus and a variable load connected to the common power bus. A first power supply output node and a first sense line node of a first power supply are connected to the common power bus. A second power supply outpu...	01/13/2004
6618265	Wiring arrangement ensuring all-or-none operation of a series of modular load elements All-or-none operation of a series of modular load elements is ensured by routing high and low voltage lines from a power source through opposite nodes positioned at either end of the series of load elements. This arrangement prevents activation of only a ...	09/09/2003
6404326	Redundant power communications circuit A redundant power and communications network that is generally fault tolerant and generally immune to single point failure. A primary or master node communicates via a standard multiplex protocol to the control infrastructure of a vehicle. The master node...	06/11/2002
6268559	Photovoltaic generation system, wiring apparatus for photovoltaic generation system, and wiring structure therefor A wiring apparatus comprises a trunk cable, branch junctions, and branch cables diverging individually from the branch junctions. A plurality of photovoltaic modules, which are arranged side by side on a roof of a building or the like, or module units, co...	07/31/2001
5962996	Inverter apparatus In an inverter apparatus for converting a direct current to an intermittent current by a converter configured by parallel-connected plural pairs of serially-coupled switching elements, resistance loads are connected across output terminals of the converte...	10/05/1999
5780938	Duplex encoder/decoder for alternating current systems A duplexing encoder/decoder pair for operating two loads independently, from two independent current sources, and using two conductors to connect the current sources and return to the loads, in general, and for expanding automatic sprinkler systems compri...	07/14/1998
5659206	Electrical circuit system including voltage detector to selectively halt operation of an electrical circuit An electrical circuit has a power source line from a battery. The power source line is divided into a primary side and a secondary side by a device, such as, for example, a diode. A high current load circuit is connected to the primary side and a lower cu...	08/19/1997
5619076	Method and apparatus for connection and disconnection of batteries to uninterruptible power systems and the like Connection of batteries to the DC bus lines across which capacitors are connected in power systems, such as uninterruptible power systems, is carried out using an auxiliary switch which is controlled to connect the batteries to a DC bus line through a pre...	04/08/1997
5541457	Electrical current actuated accessory outlet An electrical current actuated accessory outlet including a power cable receiving mechanism removably securable to a remote electrical power receptacle for receiving a source of alternating current therefrom; and an electric circuit including an electrica...	07/30/1996
5216285	Freight car with electrical power distribution A multi-unit railway freight car of which each unit defines a container well for receiving cargo containers, and including a permanently installed power distribution cable arrangement, for receiving power from a generator carried in a container well and f...	06/01/1993
5099157	Master/slave circuit employing triacs The master/slave circuit has a power supply with two conductors. One conductor is connected to one side of both a master outlet and a slave outlet. The other conductor is connected to the main terminal 1 (MR1) of the Triacs Q1, Q2 respectively associated ...	03/24/1992
5043594	High torque-high speed universal power control console with attached foot pedal controller An operator controlled variable electrical power delivery console and foot pedal controller are provided. The variable electrical power delivery console is designed to supply power to universal motors that are subjected to fluctuating loads that impact th...	08/27/1991
4725739	AC branch power distribution filter An AC branch power distribution filter is provided for supplying AC power to a plurality of different load devices from a common external AC power source that eliminates the need for a separate protection device at each power outlet with the load devices....	02/16/1988
4695741	Switchgear A switchgear operable to conduct or shut off the a.c. current to an a.c. load by use of a semiconductor switch. The switchgear is formed such that a common thyristor switch in serial connection with a switch is connected in parallel to a switch for each o...	09/22/1987
4689711	Monolithically integrated, polarity-reversal protected circuit A monolithically integrated, polarity-reversal protected switching circuit includes, in the output of a switching stage, a symmetrical thyristor instead of an otherwise customary diode. This thyristor is constituted by an npn transistor and a lateral pnp ...	08/25/1987
4480197	Multiple load switching circuit The specification discloses an electronic circuit which allows selective energization of electrical loads from a remote location by successive momentary interruptions of a common power source. In one embodiment, a ceiling fan and an attached light fixture are ...	10/30/1984
4435089	Power circuit for an electronic timepiece A timepiece includes in addition to the conventional timekeeping circuits, high load, that is, high current circuits such as an alarm driving circuit and a lamp driving circuit. Low load, small current systems such as the oscillator, divider, display driv...	03/06/1984
4417196	Cord sets with power-factor control The invention contemplates a cord set involving a plug unit connected to one end of a multiple-conductor cord or cable, and destined to concurrently serve different electrical loads within a given utilization device. A suitably miniaturized power-factor c...	11/22/1983
4349745	Testing circuit for fuel burner controls A testing circuit for a control system has a two-state input circuit connected across a plurality of switching devices. The input circuit assumes one state when any one of the contacts is closed and the other state when they are all open. An indicator dev...	09/14/1982
4206367	Energy saving device The current from an external AC power source is rectified to charge a DC battery and conduct current therethrough in series with a load during one-half of each power cycle of the external source. During the other half of each cycle, current is conducted t...	06/03/1980
4156151	Electric apparatus for the distribution of energy particularly for vehicles A system for distributing electrical energy to the electric current consumer devices of an automobile without having to wire each consumer individually via a switch to the power source, comprising a central control unit connected to a plurality of remote ...	05/22/1979
4149094	Dental apparatus having a plurality of dental instruments Dental apparatus having a plurality of dental instruments, holders for the instruments, signal transmitters each operable to transmit an extraction signal when an instrument is extracted from its holder, and a logic-actuation circuit for each instrument c...	04/10/1979
4008467	Power line carrier communication system having efficient carrier signal coupling of distribution secondary lines An arrangement of components for a distribution line communication system. Two or more independent secondary distribution lines are connected, through distribution transformers, to a primary distribution line. Carrier communication signals are transferred...	02/15/1977
3943431	Current-splitting network A current-splitting network comprises a voltage divider having first and second output terminals, the potentials at the first and second output terminals having a predetermined ratio. A first amplifier is coupled between one end of a first resistor and th...	03/09/1976

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Class 307/12 - Common conductor or return type