Centricut, Inc.

Vermont Castins, Inc.

E Smith Reed, Jr

Derik K Andors

Robert W Ferguson

Richard George Ellis

A plasma arc torch for cutting metal with the heat of a constricted arc and removing the molten material with a jet of hot ionized gases comprises a nozzle assembly in the torch includes a nozzle base and an insulator with a constricting orifice. The base and insulator are spaced from each other to form a flow path for a coolant such as water. An interference fit between the base and the insulator exerts a radially outward force on the insulator to enable the base and insulator to be assembled and disassembled with a pressing or pulling force in the approximate range of 0.3 to 16.0 pounds.

Nozzle assembly for plasma arc cutting torch

A wood stove with glass panels for viewing of the fire therein includes a glass cleaning system with a number of features which in combination effectively prevent soot and creosote buildup. A uniform curtain of hot air is directed downwardly over the glass panels to maintain the interior surface at an elevated temperature and form a barrier to prevent soot and creosote buildup on the glass panels. The curtain of hot air is supplied by a system of interior manifolds, including a first air reservoir manifold and a second manifold positioned above the glass panels for reducing turbulence and forming a uniform laminar curtain of air. Hot air is delivered symmetrically to the air reservoir manifold from side manifolds. In addition, the glass cleaning system includes dual pane glass to help maintain the glass interior at an elevated temperature and andirons to prevent the wood from blocking or deflecting the curtain of hot air. A deflector at the bottom of the glass panels redirects the curtain of hot air into the combustion region and causes vigorous burning which assists in elevating the temperature of the glass panels. A gas exit positioned high on the rear wall promotes smooth air flow across the glass panels and through the combustion region.

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Hanover, NH, United States of America

E Smith Reed, Jr