Abstract: A video interface circuit reduces loading losses when a video system component, such as a television receiver, is connected to a transmission line by amplifying the video signal with a high frequency amplifier and providing positive feedback of the amplified signal to the cable.

Abstract: This invention is a modular electronics mounting system according that is easy to install and that can be used with a wide variety of electronics components. A support plate includes a grid of holes arranged in at least one pair of columns spaced apart by a selected distance. The holes in each of the columns are spaced apart by a predetermined interval. The support plate is configured to be mounted to a wall such that the grid is spaced apart from the wall. A module formed generally as a plate such that an electronic component may be mounted thereto. The module includes a pair of hooks extending from a first edge of the plate. The hooks are spaced apart by the column spacing such that the hooks may be arranged to extend through first and second holes in the grid. A locking pin extends from the module such that the locking pin extends into a corresponding third hole in the grid to restrain the module against movement parallel to the support plate.

Abstract: A video signal distribution system comprises an interface device and video signal input means for receiving TV signals on broadcast channels connected to the interface device. A plurality of video appliances and a plurality of TV sets may be connected to the interface device such that the television sets are arranged to be remote from the plurality of video appliances. A person using the system has a remote control device that may be actuated to emit signals for selecting channels for viewing and to control the video appliances. Each of the television sets includes a repeater arranged to receive the control signals from the remote control device and form corresponding electrical control signals. The interface device receives the electrical control signals corresponding to a selected TV set and directs electrical control signals to a selected one of the plurality of video appliances to provide video signals to the television sets.

Abstract: A mounting plate and locking key are arranged to mount a camera lens housing to a faceplate. The lens housing extends through a hole in the mounting plate so that an end of the lens housing is aligned with a hole in the faceplate. The mounting plate is a thin, elongate rectangle having a raised central portion and a pair of support members extending in opposite directions therefrom. The locking key is a thin elongate rectangle having a generally U-shaped opening formed in one end. The locking key is inserted between the faceplate and the raised central portion of the mounting plate. The U-shaped opening is then in alignment with the hole in the mounting plate so that edges of the U-shaped opening are engaged with the lens housing.

Abstract: An interface device permits installation of a video system by direction broadband RF signals from an outdoors transmission line to an indoors receiver and by providing electrical power from the receiver to the transmission line for the antenna electronics without requiring a hole for passage of a coaxial cable. Power transmission circuitry includes a first inductor mounted adjacent the first side of a window and connected to the first transmission line to receive DC electrical power therefrom. A square wave drive signal is applied to switch apparatus that converts the DC power received by the inductor into time-varying electrical signals that produce a time-varying magnetic field. A second inductor that is part of a resonant circuit mounted adjacent the dielectric layer opposite the first inductor receives the transmitted power via magnetic induction.

Abstract: An interface device permits installation of a video system by directing broadband RF signals from an outdoors transmission line to an indoors receiver and by providing electrical power from the receiver to the transmission line for the antenna electronics without requiring a hole for passage of a coaxial cable. Power transmission circuitry includes a first inductor mounted adjacent the first side of a window and connected to the first transmission line to receive DC electrical power therefrom. A square wave drive signal is applied to switch apparatus that converts the DC power received by the inductor into time-varying electrical signals that produce a time-varying magnetic field. A second inductor mounted adjacent the dielectric layer opposite the first inductor receives the transmitted power via magnetic induction.

Abstract: A system for supplying control signals, DC power and video signals to a plurality of video system components includes a DC signal splitter and an RF signal splitter. The RF signal splitter carries video signal to a multiplicity of components. The DC signal splitter carries DC power and low frequency control signals to the multiplicity of components. Each of the signal paths for the DC power and the control signals includes DC short circuit protection, which prevents the occurrence of a short circuit in one output from causing the entire system to fail.