Disclosed is an optical recording medium, comprising a polymer alloy forming a phase-separated domain structure of a coating object, and a volatile substance interacting with the polymer alloy. The circuit breaker has a single pole module housing having a 1 W width with a first conduction path and a second conduction path disposed within the single pole module housing. A vapor or fog of an organic solvent is fed into at least a space in the sealed container above the level of the warm pure water and is then terminated at a prescribed time. By connecting the membrane to an element embedded in the monolithic body, membrane elasticity may be adjusted to provide the pressure sensor with a desired sensitivity for a specific application. Various other features and variations are disclosed. The drive mechanism 64 has a first hub 82, a second hub 84 that is biased relative to the first hub 82, and a pivotal latch member 66 that is biased towards an engaged position with the second hub 94.