Abstract: The viewing angle of a liquid crystal display may be controlled by storing a digital code which represents the viewing angle, and converting the stored digital code to an analog voltage which is applied to the bias input of the liquid crystal display. To adjust the viewing angle, a new digital code is stored using keypad input. The invention is particularly suitable for microprocessor controlled displays, and eliminates the need for a hinged or pivoted display, or a viewing angle adjustment knob.

Abstract: A remote actuated command circuit establishes telephone communications between a communications device at a remote location and a local communications terminal device without interference from a telephone answering machine connected to the incoming telephone line. The remote actuated command circuit establishes these communications when it receives from the remote communications device a predetermined signal not normally available to a telephone user.

Abstract: A security system includes a display for displaying user prompts to select from a set of alternative options for controlling the system, so that the user may respond by selecting one of the options. If further information is necessary, second and subsequent sets of options are displayed for user selection. If an authorization code is required, a prompt for an authorization code is displayed. The sets of options are preferably displayed adjacent a keypad, so that an option may be selected by actuating the key adjacent the selected option. Sequences of commands need not be memorized by a user, and complicated keyboards are not required to control the security system.

Abstract: A printed circuit board including a dielectric material having first and second major surfaces, a predetermined number of electrical conductors attached to the major surfaces, a plurality of slots in the board, the slots beginning at the free edge of the board and continuing inwardly for a predetermined length, a portion of the electrical conductors lying parallel and adjacent to a portion of the longitudinal axis of the slots on both of the major surfaces, and a "U" shaped current carrying connector inserted into one of the slots the terminal free edges thereof in mechanical engagement with a preselected conductor of the first surface and a preselected conductor of the second surface forming an electrical path there between.