Abstract: An artificial hip cup design having an external groove for accepting a split ring or segmented split rings with knife shaped edges and specially designed set screws which expand the split ring's outer diameter. After the cup is placed in the socket of the pelvic bone, it can be readjusted, if necessary, and then locked in final position.

Abstract: A swivel bearing assembly consists of an outer housing, a ball and a shaft, a cover, and ball bearings, wherein a free-zone channel. A free-zone channel allows the ball bearings to roll freely in the assembly as they follow the motion of the ball and shaft. The ball bearings eliminate friction between ball and outer housing. The ball and shaft can have simultaneous rotational and angular motion. Only unidirectional load can be applied to the bearing in the direction of the mounting surface.

Abstract: Prosthetic hips are well known in the arts and have been successfully used for many years. There are, however, some inherent health problems associated with present art designs. All of the prosthetic hip designs utilize a variety of materials. Most used are plastic, ceramic and metal materials. One of the main problems associated with prior art prosthetic hips involves friction generated between cup and ball. Friction dislodges, from cup and ball surfaces, plastic, ceramic or metallic fragments during a patient's normal motor functions. These particles interact with the body's chemistry and may cause deleterious health side effects. Rubbing action between cup and ball also produces ions which can adversely affect the patient's health. It is therefore essential that friction between prosthetic hip cup and ball is reduced to a minimum. The design of the prosthetic hip presented herewith will alleviate some of the unwanted friction between cup and ball.

Abstract: A single design ball bearing assembly for multipurpose use is presented. A split outer race which consists of two identical hemispherical parts allows this bearing assembly to be constructed and assembled with a variety of ball and shaft designs. Ball and shaft serve as an inner race in prior-art designs. A partition between each identical hemispherical outer race (housing) keeps ball bearings in each outer race from migrating into each other. A hemispherical outer race having a free zone channel permits the ball bearings to roll into and out of the free zone channel during angular motion of the ball and shaft, similar to the motion of present-art linear bearings where ball bearings roll and translate into and out of specially constructed channels. The free zone channel's cross section is slightly larger than the ball bearings' diameter in order to allow the ball bearings' free motion in the channel.

Abstract: A swivel bearing assembly is presented (Drawing #1). This swivel bearing assembly (Drawing #2) consists of an outer housing (Part #1) ball and shaft (Part #2), cover (Part #3) and ball bearings (Part #4). The main feature of this design is the “free zone” channel (Drawing #3). The “free zone” channel allows the ball bearings (Part #4) to roll freely in the assembly, as they follow the motion of the ball and shaft. The ball bearings incorporated in this design eliminate friction between ball and outer housing. Ball and shaft can have simultaneous rotational and angular motion. Only unidirectional load can be applied to this bearing—in the direction of the mounting surface (Drawing #5).

Abstract: An array of electrostatic quadrupoles, capable of providing strong electrostatic focusing simultaneously on multiple beams, is easily fabricated from a single array element comprising a support rod and multiple electrodes spaced at intervals along the rod. The rods are secured to four terminals which are isolated by only four insulators. This structure requires bias voltage to be supplied to only two terminals and eliminates the need for individual electrode bias and insulators, as well as increases life by eliminating beam plating of insulators.