Abstract: An orthopedic trialing instrument may include a shaft extending from a first end to a second end, a handle coupled to the shaft, and a first interbody trial disposed on the first end. In various embodiments, the first interbody trial may include a first bone screw indicator configured to visually represent a corresponding bone screw trajectory. In some embodiments, a double-sided orthopedic trialing instrument may include a first interbody trial on a first end and a second interbody trial on a second end. In various embodiments, each of the first interbody trial and second interbody trial may have at least one bone screw protrusion configured to visually represent a corresponding bone screw trajectory. In some embodiments, a plurality of orthopedic trialing instruments having differently sized interbody trials may be provided as a kit.

Abstract: An adjustable emergency fan belt is provided which substitutes in an emergency as a fan belt. The emergency fan belt has a plurality of belt links that may be used in any combination with a main belt to produce a belt of various lengths. Installation of the belt around the fly wheels is relatively simple and requires no mechanical skill or tools.

Abstract: A lead acid battery plate is disclosed wherein sodium silicate is added to the paste mix before the grids are pasted to reduce the tendency to create lead dust from handling of the plates without significantly reducing battery performance.

Abstract: This invention relates to an apparatus for cleaning accumulated carbon and other material from the ring grooves of pistons. The apparatus includes a cylindrical housing adapted to accommodate a piston therein, and a plurality of mutually spaced apart cleaning blades disposed along the axial length of the interior of the housing. The blades are adapted to insert into ring grooves of a piston when the piston is placed within the housing. Biasing means are included to urge the cleaning blades into the ring grooves, so that as the piston is rotated with respect to the housing, the blades can clean out accumulated carbon and other foreign material. The apparatus also includes means disposed within the housing for holding the piston snugly within the housing to prevent radial displacement of the piston as it is being rotated within the housing.

Abstract: A process is described for repairing secondary batteries which have defective seals. The process of repair can be performed safely while the battery is in operation.