AUTOMATIC CUT-OUT FOR INCANDESCENT ELECTRIC LAMPS

INTERRUPTEUR AUTOMATIQUE POUR LAMPES ELECTRIQUES INCANDESCENTES

Claims

Claim lst A resistance coil, formed of insulated fine wire, or other material of low conductivity, adapted to be thrown automatically into circuit, so as to afford another path for the electric current, when the electric lamp becomes out of circuit, and which resistance coil offers a resistance to the electric current equivalent to that in the loop circuit, when the lamp is in circuit or incandescent, so as to prevent other electric lamps in the same series or set as the lamp in which the lamp circuit has become broken from receiving too high a current, substantially as specified. 2nd In combination, with a wire leading from the main circuit, an electro-magnet adapted when energized and when the electric lamp is in circuit to attract the end of a pivoted armature, so as to raise the other end of this pivoted armature in such a manner as to break the circuit from, and to the main line, and through an equivalent resistance coil, substantially as specified. 3rd A pivoted armature adapted to be actuated by, and to have one end thereof drawn to an electro-magnet, when the electric lamp is in circuit, and when the circuit through the incandescent lamp is broken, and the core of electro¬magnet demagnetized to permit the end of pivoted armature away from the electro-magnet to be drawn down or descend, so as to close a circuit through an equivalent resistance coil, substantially as specified. 4th The combination of the resistance coil B, composed of fine wire f, sheet asbestos o and perforated metal drum D, and the non-conducting base E, said resistance coil B having terminals d and e adapted to complete a circuit through the said resistance coil back to the main line, when the lamp circuit has become broken, substantially as specified. 5th In an electric lamp, when the circuit through the lamp has become broken, the combination of the resistance coil B having terminal d connected with main line, and terminal e connected with strut F, non-conducting base E and armature II weighted at 1, and having contact spring f1 and pivoted to standard I, and wire M leading to main line, thus forming a new circuit for the electric current, substantially as specified. 6th In an electric lamp, when the current, through the lamp is complete, the combination of wire L, electro-magnet K and armature H pivoted in standard I, the non-conducting base E, the electro-magnet terminal k3, binding post N, metal cap P, filament i and wires i1 and i11 enclosed in "vacuo" in glass bulb Q, screw R and wire M connected to standard I and completing the circuit back to the lamp line, and break-ing the circuit through the equivalent resistance coil B, substantially as specified. 7th The armature H pivoted on a standard suitably supported, and having a spring contact-piece le attached to the weighted end of said armature, which is adapted to complete a circuit through the strut F, and equivalent resistance coil B, when the circuit through the electric lamp has become broken, substantially as described and for the purpose specified. 8th In an electric lamp, when the circuit through lamp is complete, an electro-magnet ad¬apted to raise a spring contact piece on the weighted end of a pivoted armature, so as to break the contact with the terminal of a resistance coil, and leave the resistance coil out of circuit when the circuit through the lamp is complete, substantially as described and for the purpose specified. 9th The pivoted armature H, pivoted on a standard suitably supported, and having one end thereof adapted to be brought in contact with the strut F, and complete a circuit through the equivalent resistance coil B, when the circuit through the electric lamp has become broken, substantially as specified.