Abstract: Welding apparatus which includes a fuel container for liquefied gas, an oxygen generator, a burner nozzle, and a flow control system for conveying a controlled amount of gas and oxygen from the fuel container and oxygen generator to the burner nozzle for combustion. The oxygen generator includes a reactor which contains a catalyst for decomposing the oxygen generating compound to produce oxygen and water and accompanying heat. Heated oxygen and water from the reaction are carried to a collection chamber by a condenser system which condenses substantially all of the water. An evaporator system carries oxygen from the collection chamber to the flow control system. In one embodiment it is arranged in thermal association with the reactor so that the heat of the reaction is utilized to vaporize any water entrained in the oxygen coming from the collection chamber, thereby promoting proper combustion of the oxygen and fuel at the burner nozzle.

Abstract: A time clock is provided which includes a minute wheel that is advanced every minute and an hour wheel that must be advanced every hour, wherein a deflecting pawl device is utilized, in place of gears, to connect the wheels. Both wheels have ratchet teeth, and a pawl that oscilltes once each minute to advance the minute wheel. The minute wheel, which rotates once every hour, has a cam that moves beside the pawl to deflect it sidewardly so that the pawl engages a tooth on the hour wheel. Thus, at the next oscillation of the pawl, both wheels are advanced. The minute wheel bears the numbers 0 through 59, while the hour wheel bears the numbers 1 through 12 repeated five times, so that both wheels have 60 numbers.