Other

A.o. Smith Corporation

Lochinvar Corporation

Daniel B Mitchell

Robert D Lloyd

Curtis George Gagne

Brian Thomas Branecky

John Charles Paine

Barry Collins

Robert W Wiseman

Mohamed Mehdi Doura

Yonggon Lee

Gary L Sheldon

A fluid heating system including a burner unit is operated based on feedback control loops. The fluid heating system comprises a burner unit configured to heat a fluid, a sensor configured to sense a characteristic of the appliance, and a controller coupled to the burner unit and the sensor. The controller includes an electronic processor and a memory. The controller is configured to receive a first signal corresponding to the characteristic from the sensor, determine, based on the first signal, a first feedback loop control, control combustion of the burner unit based on the first feedback loop control, determine, based on the first feedback loop control, a second feedback loop control, and control combustion of the burner unit based on the second feedback loop control.

Fluid heating system with combustion trim learning

A hydronic water heating system heats water for various types of heat emitters. A boiler assembly includes a user interface which receives user-defined water temperature set point corresponding to a minimum outdoor temperature, and an integrated controller generates a nonlinear outdoor reset curve between the user-defined set point and a second set point corresponding to maximum outdoor temperature for which heating is required, and regulates the boiler to heat water to a temperature corresponding to a set point along the nonlinear output reset curve and based on a detected outdoor temperature. The nonlinear outdoor reset curve may be generated based on aggregated heat output functions for various types of heat emitters. A linear outdoor reset curve may be generated between a maximum water temperature set point and the user-defined set point, having a slope equal to an instantaneous slope of the nonlinear outdoor reset curve at the user-defined set point.

Boiler integrated control with non-linear outdoor reset methodology

Methods and apparatus for the electric arc welding of metal workpieces utilize a current comprised of squared waveform high-amplitude current pulse groups alternated with squared waveform low-amplitude current pulse groups, the current pulse groups being developed or developed and algorithmically varied in response to detected welding arc voltage/current condition changes and with respect to pulse group periods, pulse group peak current amplitudes, pulse group repetition frequencies, and pulse group current rise/fall rates for particular applications.

Electric arc welding

A golf club which generally includes a shaft, a grip and a clubhead, which includes a sole, a back and a clubface. The surface layer of the clubface of the golf club is a substantially harder material than the material generally comprising the clubhead. The process for imparting the substantially harder material onto and to become a part of the surface layer of the clubface generally includes micro-welding an electrode material to the surface of the clubface. The micro-welding process can be any one of a number of known micro-welding processes, such as electro-spark deposition, or others. The electro-spark deposition process generally includes the utilization of an electrode, through which short duration, high amperage charges are directed through the electrode and the clubhead. Extremely short duration discharges at high discharge frequencies result in deposition of the electrode material onto the clubface of the golf club, such that it becomes micro-welded.

Golf club, and improvement process

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Wolthington, OH, United States of America

Daniel B Mitchell