Abstract: An improved hand-held implement is provided with a body having external surfaces that define contours which match and ergonomically engage the surfaces of a user's thumb and fingers when the user grasps the implement, so as to provide a large surface area of contact between the user's hand and the implement. The increased area of contact between the user's hand and the implement, compared to traditional designs, decreases the required level of applied unit area pressure, and also provides for greater control consequently facilitating manipulation of the implement. The exterior of the implement is sufficiently small so that, while in use, the body of the implement does not extend outside or beyond the hand of the user. The cartridge includes a coaxial retention ring device which readily fits into the body of the implement by the resilient engagement of the ring into the coaxial recessed groove in the implement body.

Abstract: Disclosed is a display assembly comprising a graphical or alphanumeric display and display source such as a clock or other timepiece; a display housing for retaining the display; self-righting means rotatably coupled to the display and display housing with a predetermined bias; a body; and a connecting means operatively engaging the display housing and body. The connecting means in the form of a Cassegrain assembly allows the display housing to swivel with respect to the body over 360 degrees through a vertical plane and horizontal plane independently. The display, when operatively coupled to the self-righting means, is automatically maintained in a substantially upright position independent of the orientation display housing, thereby allowing the display to be turned to face a viewer at any angle without repositioning the body or leveling the display.