Patent ID: 8154395

Claim:
A portable, modular child seat safety system for warning of the presence of a child in an infant seat having an infant seat cushion, the infant seat being located in an electric battery powered motor vehicle with an engine, the system comprising: pressure sensor switch means for detecting the presence of a child in an infant seat, said pressure sensor switch means being removeably positioned beneath the infant seat cushion of at least one infant seat; electrical line means extending from the pressure sensor switch means for conducting electricity through an electrical circuit when the child is in the infant seat; an interface unit comprising receptacle means for the removeable connection of the electric line means, the interface unit further comprising a secondary source of electricity for powering the circuit; second electrical line means extending from the interface unit for conducting electricity when the child is in the infant seat; controller means having a removeable plug section for receiving electricity from the battery of the motor vehicle and a display section to indicate the presence of the child in the infant seat, the second electrical line means extending from the interface unit to the controller means; relay means for directing the source of electricity through the circuit, whereby when the child is positioned in the infant seat and the vehicle's engine is running, the pressure sensing switch means closes the electrical circuit and the relay means directs electricity from the battery to the controller means to indicate the presence of the child in the infant seat, and when the vehicle's engine is not running the relay means optionally directs electricity from the secondary source of electricity to the controller means to indicate the presence of the child in the infant seat; the pressure sensing switch means, the controller means, the interface unit, the relay, and the electrical lines each comprising individual modular components of the system which are not permanently installed within the motor vehicle, all said modular components being separable and removeable from the motor vehicle so that they are portably interchangeable for use between different motor vehicles.