Abstract: A stylus (100) is configured for actively interacting with a touch-sensitive interface (201) by injecting or sinking charge in response to a touch-detection signal emitted from the touch-sensitive interface (201). One stylus (100) includes a stylus body (104) and a compound tip (105) extending axially from the stylus body (104). The compound tip (105) can include a center electrode (101) that is configured to detect electric field variations from the touch-sensitive interface (201) and a shroud electrode (102) that is concentrically disposed about the center electrode (101). An active circuit (103) coupled between the center electrode (101) and the shroud electrode (102) is configured to apply a gain to the detected electric field variations and to change a potential of the shroud electrode (102) synchronously with the electric field variations detected by the center electrode (101).

Abstract: A digital keypad coded entry electronic lock is provided for operating an electronically operated door bolt locking mechanism within a closure or safe. The digital input handle is provided in two parts, with an upper head part positioning the keypad away from a depending handle part. Insertion and removal of an electronic storage battery is facilitated by providing an open rear portion of the handle through which the battery can be inserted or removed without the need for screws, pins or tools.