Abstract: Various shaped abrasive particles are disclosed. Each shaped abrasive particle includes a body having at least one major surface and a side surface extending from the major surface.

Abstract: An adapter for holding a spiral bound booklet in a multiple ring notebook. The adapter comprises a flat carrier with holes to receive the notebook rings and supports an elongated rod which passes through the spirals of the spiral binding. End crowns are removable to allow removal of the elongated rod from the spirals.

Abstract: An improved bookholder for use with a pole lamp comprising a book support having a back rest and pivotable ledges adapted to hold the book in a selectable orientation, an attachment at one end thereof to the bookholder, the arm being sufficiently flexible to be bent to a desired shape and sufficiently rigid to maintain the shape after it is bent, and a shade attached to the other end of the adjustable arm, whereby the shade may be adjusted with respect to the light source and a book on the book support. Preferably, the shade comprises light-attenuating vanes which may be folded up like a fan when not in use, or opened to any desired extent to change the size of the shade. The adjustable arm holding the shade may be bent or moved in a variety of directions to adjust the position of the shade with respect to the light source.

Abstract: A bookholder with a base member having a longitudinally extending base portion forward from a U-shaped rod defining a first planar surface; a support member having a longitudinally extending support portion formed from another U-shaped rod defining a second planar surface; a book carrier mounted on the support member having book-supporting ledges; and a transverse coupling member with pairs of holes arranged to receive and hold both the base portion rod and the support portion rod so the first and second planar surfaces intersect at a preselected included angle. The book carrier is movable along the support member to adjust the height of the book carrier with respect to the coupling member. The base member rod is movable with respect to the coupling member between a first "suspending mode" position when the selected included angle is approximately between 90.degree. and 130.degree., into a second "table supporting mode" position when the selected included angle is between 90.degree. and 50.degree..

Abstract: An improved bookholder comprises a lower part, which has a base member and upstanding, spaced, front and rear walls, and an upper part, which has a top member and spaced depending left and right side walls. The upper part is adapted to provide a complementary fit with the lower part so as to form a box-like structure. One or more hinges connect the top member with the rear wall, and a retaining strip clamped between the top member and rear wall lock the upper part in position.The side walls are pivotally attached near their centers to the top member by thumb screw tightened pivot pins for orientation into parallel spaced relationship, a mutually perpendicular position and a mutually co-planar position for temporarily re-orientating and fixing said side walls on said top member to provide ledges for holding a book.

Abstract: A bookholder for reclined reading includes a support arm assembly of two arms meeting at a right angle and extending upwardly at approximately 45.degree. from the horizontal. The support arms provide ledges for supporting the bottom and one side of an open book at a 45.degree. angle. The ledges have a plurality of holes for selective insertion of pegs to hold the book and its pages in place.The support arm assembly is pivotably supported on a backwall member, which in turn is supported on a base member. In a modified form the support arm assembly is fixed rather than pivotable. The ledges include notches to optionally support a book in the horizontal position. A lamp for night time reading is incorporated into an open box structure in the base member.

Abstract: An improved bookholder consists of a box with a base and an opening at the top, a lid for the box which is pivotable from a first position extending in a substantially vertical direction above the base to a second position in which the lid covers the opening of the box, a pair of separately movable arms with ledges for supporting a book on the ledges when the lid is open, means for holding said book on the ledges and against the lid, the arms being arranged to be moved to a location on the lid where they will enter the opening of the box as the lid is pivoted to the second position. In its preferred form, the arms are attached to the lid to be pivotable, together with fixing means for holding them in selected positions, and are also hinged in the middle. An illuminating lamp is contained in the box, and arranged to illuminate the pages of the book.

Abstract: A capping head for a core-capping apparatus adapted to fix conforming sleeves within tubular fiber cores is constructed from a one-piece cylindrical shell having a bore therethrough to accommodate axial sliding movement of a partially conical, power actuated, tapered ram. Independent, individual punches and crimping heads are extensibly and retractably seated within recesses formed in the periphery of the shell and operatively communicate with the tapered ram through respective ball bearings located in guide passages which extend radially outward from the bore of the shell so that linear axial movement of the tapered ram within the shell causes corresponding linear, radially outward movement of the ball bearings and their respective punches and crimping heads, extending the punches and crimping heads outside of the periphery of the shell.