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A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7735459 | Modular boiler control A modular boiler system includes a boiler control, a first boiler in operative connection with the boiler control, and a temperature sensor in operative connection with the first boiler. The system also features at least one secondary boiler in operative connection ... | 06/15/2010 |
| 7628123 | Combined hot water supply system A water heater constituting a combined hot water supply system opens, in starting operation in response to an instruction from a connection controller in STEP 1, a water-supply servo valve to an operation start opening As corresponding to a water quantity sli... | 12/08/2009 |
| 7506617 | Control system for modulating water heater A control system is provided for a modulated heating system including a plurality of modulating water heaters, which may be modulating boilers. A deadband control scheme provides for reduced cycling of the modulating heater when total system heat demand falls betwee... | 03/24/2009 |
| 7220164 | Advanced finishing control An apparatus and method of using an in situ finishing information for finishing workpieces and semiconductor wafers are described. The method uses operative sensors such as friction sensors for detecting and improving control during finishing. The method can aid con... | 05/22/2007 |
| 7156717 | situ finishing aid control A method of using finishing aids for advanced finishing control is described. A finishing surface is used generally to induce frictional wear. The finishing aids with preferred in situ control can improve control of the coefficient of friction, the tangential force ... | 01/02/2007 |
| 7131890 | In situ finishing control An apparatus and method of using a in situ finishing information for finishing semiconductor wafers is described. The method uses operative sensors such as friction sensors for detecting and improving control during finishing. The method can aid control of finishing... | 11/07/2006 |
| 6745085 | Fault-tolerant multi-node stage sequencer and method for energy systems A method for controlling energy systems such as multiple boiler systems to meet an energy need includes a controller configured as a sequencer with the remaining controllers act as individual boiler controllers which periodically send status messages to the sequence... | 06/01/2004 |
| 6131536 | Infrared and gas fluid heater system An instantaneous fluid heating system includes a fluid source, a use point for intermittently demanding fluid from the fluid source, an instantaneous IR gas heater, and a temperature sensor positioned external to the heater. The instantaneous IR gas heate... | 10/17/2000 |
| 5655710 | Method for controlling operated-units count of fluid heating units In a multi-unit installation system of fluid heating units such as hot water boilers, an outstandingly superior responsivity to load variations is obtained, and fluid of stable temperature is supplied by preventing useless starts and stops. In a units cou... | 08/12/1997 |
| 5452687 | Microprocessor-based boiler sequencer A boiler sequencer system having a microprocessor based controller which allows the firing rate for multiple boilers to be increased or decreased with a proportional output integrated with the process variable rate of recovery that is desired, preventing ... | 09/26/1995 |
| 5325822 | Electrtic, modular tankless fluids heater A tankless, flow-through electric water heater whose housing is designed for modular application, where serially connected modules define the path of the fluid being heated, in this case water, through the heater from inlet to final outlet. Each module co... | 07/05/1994 |
| 5273001 | Quadrangular type multi-tube once-through boiler A quadrangular type multi-tube once-through boiler having an arrangement in which a feed path combuation air, combuation chamber, and an exhaust gas channel passing through a flue are alined in substantially the same plane, and provided with a burner duct... | 12/28/1993 |
| 5199384 | Quadrangular type multi-tube once-through boiler A quadrangular type multi-tube once-through boiler having an arrangement in which a feed path combuation air, combuation chamber, and an exhaust gas channel passing through a flue are aligned in substantially the same plane, and provided with a burner duc... | 04/06/1993 |
| 5172654 | Microprocessor-based boiler controller A microprocessor-based sequencer for a multiple boiler heating system which allows the plural boilers to operate in a base load mode whereby one or more boilers can be made to operate at their optimum operating points and as the heating demand changes, a ... | 12/22/1992 |
| 5060601 | Water-tube boiler and a heating installation equipped with such a boiler A water-tube boiler is disclosed, comprising a body in which are located the furnace and a series of vertical tubes serving as heating and exchange surface between the furnace and the water to be heated flowing through these tubes, two respectively upper ... | 10/29/1991 |
| 5042431 | Multiple boiler control system and method of operation A multiple-boiler heating system is disclosed in which each boiler or stage is provided with an adjustable firing level of modulation at which the boiler is turned on and an adjustable threshold level of modulation (the MOD point), below which the next st... | 08/27/1991 |
| 4938173 | Fluid system A fluid system for example for steam raising comprising a flow control device (20), means (28) to supply a head of fluid to the flow control device (20), and at least one fluid using means such as a flash boiler (12-14), the flow control device (20) compr... | 07/03/1990 |
| 4864972 | Boiler optimization for multiple boiler heating plants A method and apparatus is provided for operation and optimization of boilers in a multiboiler heating plant. The apparatus includes a boiler selection means which is typically a computer which includes a fuel consumption profile for the boilers in the pla... | 09/12/1989 |
| 4860696 | Apparatus for controlling boiler system The output vapor pressure of a boiler system is controlled by selectively starting or stopping a plurality of boiler units (#1 to #4) shiftable between a high combustion state to a low combustion state in accordance with the output vapor pressure of the e... | 08/29/1989 |
| 4694783 | Multiple boiler heating system with improved venting and heat reclamation Disclosed is a heating system of the multiple condensing boiler type wherein hot exhaust gases are in heat exchange relation with the condensate in a manifold common to the boilers. The exhaust gas conduits from the boilers open into the manifold at a lev... | 09/22/1987 |
| 4638767 | Heating system The invention provides a control system for a set up including a plurality of boilers, in which each boiler is associated with a control valve which permits or prevents flow through the boiler between common flow and return mains and in which each control... | 01/27/1987 |
| 4638944 | Compact high volume point of use instantaneous water heating system A point of use, instantaneous, high-volume water heating system includes a compact accumulator tank fed by one or more instantaneous gas-fired auxiliary water heaters operating asynchronously to provide a supply of hot water on demand heated to a predeter... | 01/27/1987 |
| 4637349 | Boiler cycling controller In a system for controlling a number of central heating boilers of large capacity having means for switching-off each boiler when the flow temperature reaches a predetermined maximum, the temperature at which each boiler is switched on again can be automa... | 01/20/1987 |
| 4598668 | Apparatus for efficiently controlling the operation of parallel boiler units There is disclosed a control apparatus for operating any one of a plurality of parallel connected boilers as a lead boiler, with the others operating as lag boilers. The control apparatus enables a lag boiler to assist the lead boiler during a prolonged o... | 07/08/1986 |
| 4583497 | Boiler control Boiler optimization is included in on-line control of parallel boilers by multiplying the total heat per unit time which must be supplied to all parallel boilers by the percentage of the total heat which should be supplied to each boiler in order to subst... | 04/22/1986 |
| 4576124 | Apparatus and method for fluidly connecting a boiler into pressurized steam feed line and combined-cycle steam generator power plant embodying the same A coupling controller opens a dump valve at the outlet of a heat recovery steam generator when such generator is to be coupled to another generator being in operation with a steam turbine on a common header. The controller gradually permits pressure build... | 03/18/1986 |
| 4572110 | Combined heat recovery and emission control system A gas turbine cogeneration plant having a combined heat recovery and emission control system with a first steam boiler having a bank of steam generating tubes upstream of a NOX emission reduction unit and second and third steam boilers having banks of ste... | 02/25/1986 |
| 4559785 | Boiler control Boiler optimization is included in on-line control of parallel boilers by multiplying the total heat per unit time which must be supplied to all parallel boilers by the percentage of the total heat which should be supplied to each boiler by primary and se... | 12/24/1985 |
| 4557686 | Control of the flow of fuel to multiple burners The flow of offgas from a common source as a fuel for multiple boilers is controlled so as to maintain a desired minimum pressure for the offgas supply unless the maintenance of such a desired minimum pressure would result in so much offgas being supplied... | 12/10/1985 |
| 4534321 | Apparatus for controlling a number of boilers The disclosure relates to an apparatus for controlling a number of boilers which are, in terms of water engineering, interconnected in series and each are provided with their control equipment having a first and a second switch, the first switch being arr... | 08/13/1985 |
| 4421068 | Optimization of steam distribution A system and process is provided for controlling a steam generation and distribution system including a plurality of headers. Each of the headers is coupled to steam using devices such as steam turbines and steam supplying devices such as boilers. The pro... | 12/20/1983 |
| 4418541 | Boiler loading system A boiler loading system is disclosed which is used for loading one of a plurality of boilers in a power plant to satisfy a load demand. Each of the boilers is continuously monitored for an optimum efficiency change whether for a boiler load increase deman... | 12/06/1983 |
| 4373663 | Condition control system for efficient transfer of energy to and from a working fluid A condition control system adapted to supply a working fluid that has been modified by transferring energy to or from the working fluid is disclosed wherein a minimum energy loss is accomplished in operating the control system. The control system adjusts ... | 02/15/1983 |
| 4324207 | Energy efficient water heater Apparatus is disclosed for heating hot water in separate tank stages, and according to predetermined cyclic time patterns. A first smaller hot water tank is heated to a first elevated temperature under thermostatic control, and a second larger hot water t... | 04/13/1982 |
| 4187701 | Laundry hot water supply system and apparatus A laundry dryer source of heat for providing warm gas to dry laundry is utilized to heat water for laundry washers use, and is particularly suited for coin operated laundries. In the illustrated embodiment each dryer has a gas burner and a water coil is i... | 02/12/1980 |
| 4145995 | Method of operating a power plant and apparatus therefor In the control of the operation of a power plant including a gas turbine power generating unit, a main boiler whose heat source is exhaust gas of the gas turbine and which supplies steam to a heat load, a back-up boiler which has an independent fuel syste... | 03/27/1979 |
| 4069675 | Method of optimizing the performance of a multi-unit power A method of optimizing the performance of a multi-unit power plant which produces both electrical and steam energy by determining the incremental efficiency of power boilers with various fuel inputs and thereafter determining the index of performance by t... | 01/24/1978 |
| 4051814 | High pressure washer A pressurized hot fluid washer includes a combination pumping unit driven by a closed hydraulic system which applies driving impulse forces to an interlocked liquid pump member and a fuel pump member. The liquid pump and fuel pump are hydraulically interl... | 10/04/1977 |
| 3964466 | Parallel fluid heating system A parallel water heating system having a plurality of water heaters supplying heated water to a plurality of water consuming loads. The water consuming outlet conduit from each of the water heaters includes a temperature responsive control valve that cont... | 06/22/1976 |
| 3956898 | Marine vapor generator having low temperature reheater A vapor generator organization arranged for operation in a marine reheat power plant is described in which the reheater tube bundle is disposed in the rear gas pass section of the unit where it is subjected only to low temperature combustion gas during pe... | 05/18/1976 |
