Abstract: A high efficiency grate and stove heating unit for extracting useful heat from a fire, comprising in combination a low metal enclosure having an expansive top wall constituting a grate proper for supporting fireplace logs and the coals resulting therefrom, together with multiple heat exchangers in the form of plates or corrugation ribs on the top wall and means to cradle the logs thereof. Other plates or corrugation ribs extend downward from the top wall, and the plates can abut the bottom enclosure wall to constitute a reinforcement means. In one embodiment of the invention the enclosure includes an air inlet port connected with an electric blower for forcing air into the enclosure, together with multiple outlet ports from which the air, now heated, flows. A series of forward protruding nozzles is carried by the enclosure and communicates with the outlet ports to channel the heated air in directions away from the enclosure and its inlet port.

Abstract: A high efficiency grate and stove heating unit for extracting useful heat from a fire, comprising in combination a low metal enclosure having an expansive top wall constituting a grate proper for supporting fireplace logs and the coals resulting therefrom, together with multiple heat exchangers in the form of fins or plates secured to the top wall and adapted to cradle the logs thereof. Other fins or plates extend downward from the top wall and abut the bottom enclosure wall to constitute a reinforcement means. In one embodiment, the enclosure includes an air inlet port connected with an electric blower for forcing air into the enclosure, together with multiple outlet ports from which the air, now heated, flows. A series of forward protruding nozzles is carried by the enclosure and communicates with the outlet ports to channel the heated air in directions away from the enclosure and its inlet port.

Abstract: A gasoline and battery-powered electric automobile wherein the start and the running of the car are effected by an electric motor except in circumstances where the battery charge is depleted, in which case the normal cruising and higher speeds are then obtained using a gasoline or internal combustion engine which can be cut in either automatically or at will. The electric motor is powered by storage batteries that can be recharged from a generator driven by the internal combustion engine, or else from house current. One pair of wheels of the vehicle is powered by the internal combustion engine through a magnetic clutch and differential. The other set of wheels is powered through an infinitely variable mechanical transmission comprising cone pulleys or cone chains whose ratio is power-controlled in accordance with the driver's desires or else with the speed of the vehicle.