Abstract: A heat exchanger is presented that provides for mixing of a process fluid to prevent localized spikes in temperatures. The heat exchanger includes a mixing chamber within the exchanger, where a first process fluid passes from process tubes after being partially heated. The heat exchanger further includes an intermediate shell for passing a second process fluid into the fired heater and for exchanging heat with the first process fluid. The fluid flows from the mixing chamber to other process tubes for further heating.

Abstract: A log profiler for sawing surfaces into and along the length of a log may be characterized as including a saw carriage selectively translatable along a track, a pair of log holders on the track for holding the log suspended over and along the track and adapted to selectively rotate the log about its long axis, a linear double-acting saw blade mounted on a blade carriage, the blade translatable linearly along the blade carriage relative to both the blade carriage and saw carriage, the blade carriage selectively rotatable and selectively elevatable relative to the saw carriage.

Abstract: The present invention consists of a lathe attachment for installation on a portable bandsaw mill, for turning round shafts from wood blocks on the portable bandsaw mill. The lathe attachment has an elongated chassis, a tailstock and a headstock mounted on opposite ends of the chassis for holding and rotating a wood block along the chassis. Bindings are provided to retain the chassis to the cross beams of the portable bandsaw mill. In another aspect of the invention, a number of symmetrical facets are firstly sawed along the wood block prior to turning the wood block. The turning of a round shaft on the bandsaw mill is preferably effected while the alignment of the wood block or shaft makes an acute angle with the direction of movement of the bandsaw head.

Abstract: Processes are provided for producing wood chips with a variety of cross sections such as those resembling botanical leaves and other decorative designs. The processes also produces wood chips that have coloration and shading. A rough form of wood having a elongated length is extruded lengthwise to make an extrusion having a decorative cross section. The extrusion is then cut at an angle to the direction of the elongated length of the extrusion into a plurality of wood chips having the desired cross-section. The step of cutting the extrusion involves positioning a lengthwise end of the extrusion adjacent at least one cutting blade oriented at an angle in the range of about 15 degrees to about 75 degrees relative to the elongated length of the extrusion, providing a relative rotational movement between the extrusion and the blade about the longitudinal center of gravity of the extrusion, and providing a relative linear movement between the extrusion and the blade in the elongated direction towards one another.

Abstract: A woodworking apparatus includes a conventional table saw having a table and a projecting circular saw blade. A stock moving apparatus is associated with the saw table to move a piece of stock material into engagement with the saw blade. The stock moving apparatus includes a pair of longitudinal support members with a forward and rearward plate extending therebetween. The stock material is removably and selectively rotatably mounted between the forward and rearward plates. A guide is provided on the saw table to guide the stock moving apparatus in a straight line across the saw table. A pattern apparatus is provided to impart a particular shape in the stock material when the stock material is passed over the saw blade. The pattern apparatus includes a pair of spaced apart profile boards upon which the stock moving apparatus is supported during its passage over the saw table.

Abstract: The device includes a bed plate which can be placed on the table of a table saw and held against the rip fence and onto the table top by a block clamped to the rip fence which allows the bed to be moved fore-and-aft upon the table top parallel to the saw balde. A live center and a dead center are provided to hold a work piece therebetween parallel to the saw blade. In one aspect of the invention the work piece can be indexed and engage the saw blade to cut three or more equidistant lengthwise facets thereon. In another aspect these facets can be tapered end to end or from the center to each end by shifting the tail stock towards the blade or by first shifting the tail stock and then the head stock. In a still further aspect, the head stock includes means to rotate the work piece by a source of power so that a tapered cylindrical shape may be cut or dowels may be formed.

Abstract: Carriage attachment apparatus is disclosed for carrying a workpiece on an associated saw table whereby planar surfaces may be formed by sawing with common attachment between the carriage and a woodturning lathe being provided so that the sawed product is turned about the same rotational axis affording a high degree of symmetry.