Abstract: A tennis garment of fabric material and sewn construction has a front panel sewn to a rear panel with a waistband encircling the garment. A ball securing sleeve is aligned with, and joined to, the rear waistband portion at left, central, and right mutual locations, thereby establishing two ball securing sleeves into which a tennis ball may be inserted from above or below the sleeve. Once inserted, the ball is held in place by opposing upper and lower elastic bands within upper and lower hems of the sleeves. When desired, the ball may be withdrawn from the sleeves by upward or downward movement relative to the sleeves.

Abstract: A tennis garment of fabric material and sewn construction has a front panel sewn to a rear panel with a waistband encircling the garment. A ball securing sleeve is aligned with, and joined to, the rear waistband portion at left, central, and right mutual locations, thereby establishing two ball securing sleeves into which a tennis ball may be inserted from above or below the sleeve. Once inserted, the ball is held in place by opposing upper and lower elastic bands within upper and lower hems of the sleeves. When desired, the ball may be withdrawn from the sleeves by upward or downward movement relative to the sleeves.

Abstract: A column forming apparatus wherein concrete is poured into a cavity of the apparatus to form a column for a wall. Embodiments include forming the column both off-site and on-site. Other embodiments include forming a columnless wall. In one embodiment of a column molding apparatus, first and second forming pieces and first and second blocking members can be used to form a column of predetermined shape with the blocking members leaving indentations in the formed column.

Abstract: A wall forming apparatus and methods having a series of walls that are movable to form molding compartments into which fluid concrete can be poured and allowed to harden to form a cement wall. Spacer members determine the width of the compartments and, accordingly, the thickness of the manufactured wall. Steel cables under tension maintain the integrity of the shape of the compartments when they are subjected to the pressure applied against the walls by the fluid concrete.

Abstract: A method for use with a power saw having a frame with a first blade rotatably mounted thereon, the first blade having a cutting edge with a maximum first thickness. A light source is mounted on the frame. An opaque barrier has a first slot with a first width. The opaque barrier is positioned in alignment with the light source such that light from the light source passes through the first slot and shines on the first blade so as to produce a shadow of the first blade. The method includes exchanging the first blade with a second blade, the second blade having a maximum second thickness. The opaque barrier is adjusted such that the first slot is replaced with a second slot having a second width, the second width of the second slot being greater than or smaller than the first width of the first slot.

Abstract: A method for use with a power saw having a frame with a first blade rotatably mounted thereon, the first blade having a cutting edge with a maximum first thickness. A light source is mounted on the frame. An opaque barrier has a first slot with a first width. The opaque barrier is positioned in alignment with the light source such that light from the light source passes through the first slot and shines on the first blade so as to produce a shadow of the first blade. The method includes exchanging the first blade with a second blade, the second blade having a maximum second thickness. The opaque barrier is adjusted such that the first slot is replaced with a second slot having a second width, the second width of the second slot being greater than or smaller than the first width of the first slot.