Abstract: A tool assembly for use with an electrosurgical device for cutting tissue includes a base portion, a return lead, an electrical insulator, a center pin, and an active lead. The center pin extends from the base portion and through a lumen of the electrical insulator. The active lead is securely fixed to the base portion and extends between the base portion and a distal portion of the center pin such that a portion of the active lead extends around the distal portion of the center pin and first and second segments of the active lead are spaced apart from the return lead. Upon activation, electrosurgical energy is transmitted from the active lead through tissue to the return lead to cut tissue in contact with the active lead.

Abstract: A fireplace construction made of solid masonry units having a rear wall with a symmetrical bulge formed by a lower angled portion, a central vertical portion, an upper angled portion, and an upper vertical portion. Each portion is slightly spaced apart from the adjacent portion to provide a space for air to flow into the firebox. One or more air ducts route air from the room to the space between both the lower vertical portion and the lower angled portion and the space between the lower angled portion and the central vertical portion.

Abstract: A retrofit firebox assembly includes a frame, a floor, and sidewalls. The frame has a plurality of vertically extending spaced apart tube members to which solid masonry units are mounted. The back wall has a metal plenum member with a lower vertical portion, a lower angled portion, a central vertical portion, an upper angled portion, and an upper vertical portion, positioned to form a smooth, symmetrical bulge in the back wall extending into the firebox. The solid masonry units are positioned on their respective frame members using clips that position, align, and support the units. The metal plenum provides spaces for air to flow into the firebox between the lower vertical portion and the lower angled portion; and between the lower angled portion and the central vertical portion.

Abstract: A fireplace construction has: a) a solid floor; b) side walls extending upward from the floor to a flue; c) a rear wall having: i) a lower vertical portion, ii) a lower angled portion extending forward into the firebox and spaced slightly apart from the lower vertical portion to provide a space for air to flow into the firebox between the lower vertical portion and the lower angled portion, iii) a central vertical portion positioned forward of the plane of the lower vertical portion and spaced slightly apart from the lower angled portion to provide a space for air to flow into the firebox between the lower angled portion and the central vertical portion, iv) an upper angled portion extending rearward from the plane of the central vertical portion, and spaced slightly apart from the central vertical portion to provide a space for air to flow into the firebox between the central vertical portion and upper angled portion, and v) an upper vertical portion positioned rearward of the plane of the central vertic