Abstract: This disclosure provides a vapor-liquid reaction device including a vapor-liquid reaction chamber and a projecting member. The vapor-liquid reaction chamber holds a molten metal in a lower portion of an internal space of the vapor-liquid reaction chamber.

Abstract: A breathing apparatus including a case containing a chemical for generating oxygen and a monitoring circuit in the case is disclosed. The monitoring circuit includes multiple sensors that sense parameters within the case relevant to an operational status of the breathing apparatus, and a controller to receive signals from the sensors and to produce an output signal indicating the operational status of the breathing apparatus. A method for monitoring a breathing apparatus is also disclosed. The method includes using multiple sensors within a case of a breathing apparatus to sense parameters relevant to an operational status of the breathing apparatus, and processing signals from the sensors to produce an output signal representative of the operational status of the breathing apparatus. The sensors may include humidity, impact, pressure and temperature sensors.

Abstract: This disclosure provides a vapor-liquid reaction device including a vapor-liquid reaction chamber and a projecting member. The vapor-liquid reaction chamber holds a molten metal in a lower portion of an internal space of the vapor-liquid reaction chamber.

Abstract: A breathing apparatus including a case containing a chemical for generating oxygen and a monitoring circuit in the case is disclosed. The monitoring circuit includes multiple sensors to that sense parameters within the case relevant to an operational status of the breathing apparatus, and a controller to receive signals from the sensors and to produce an output signal indicating the operational status of the breathing apparatus. A method for monitoring a breathing apparatus is also disclosed. The method includes using multiple sensors within a case of a breathing apparatus to sense parameters relevant to an operational status of the breathing apparatus, and processing signals from the sensors to produce an output signal representative of the operational status of the breathing apparatus. The sensors may include humidity, impact, pressure and temperature sensors.

Abstract: This is an improvement in apparatus for detecting combustible gases, such as methane, that embodies a Wheatstone bridge circuit including a refractory-coated reference element constituting one leg of the bridge and a refractory-coated detector element having thereon a catalyst for promoting oxidation of the combustible gas to be detected constituting a second leg of the bridge. Upon oxidation of combustible gas at the detector element the temperature and resistance thereof increases relative to the reference element to unbalance the bridge, thereby producing an electrical signal proportional to the amount of combustible gas being oxidized. This invention improves the stability, linearity, and stabilization time of the bridge signal by constructing the reference element so that at zero percent combustible gas or during oxidation of the combustible gas at the detector element the radiant energy of both the detector and reference element are substantially equal.