Abstract: A power switch (2) of a coffee brewing machine comprises a button (3) for manually switching on and off the brewing machine. The switch (2) further comprises detection means (24) for switching off the brewing machine in case an abnormal situation is detected, for example, when a predetermined period of time has elapsed.

Abstract: A hot water heater control device and method for a building such as a home will allow the consumer user maximum savings with a modest investment by allowing the user to program into a control module a particular living cycle and assign a desired temperature to each of a predetermined number of heating start/stop times within the cycle. A means exists for the user to program a desired high, medium, low and off temperature into a control module. Also, any one of several special condition modes may be activated as needed in order to provide maximum flexibility and savings.

Abstract: A tubular electric resistance heater includes a tubular sheath enclosing an electric heater coil. As protective overheat safety device is provided at an end of the sheath and includes an electrically conductive tube disposed in a cavity in the end of the sheath and having a closed end electrically connected to the heater coil. A rod-shaped member made of a thermally deformable material extends through the tube from the closed and projects out of the other end of the tube into activating engagement with a normally closed switch located externally of the tubular sheath and electrically connected in series with the tube and thereby the heater coil. Excessive heater coil temperatures cause the rod-shaped member to deform and actuate the switch to its open position to deenergize the heater coil. The rod-shaped member may be made to a memory-alloy or a plastic which changes its structure, e.g., shrinks, or melts at a certain temperature.

Abstract: A submersible electric aquarium heater includes an open-ended glass tube enclosing an electric resistance heater carried by an axially disposed former. First and second bungs seal the ends of the tube. A printed circuit board carrying an adjustable electronic thermostat is positioned in the tube by first and second locators each including an annular spacer engageable with the tube and a centering post. The centering post of the first locator is insertable within the first bung, while that of the other is fixedly inserted into an end for the axially disposed former. The temperature setting of the thermostat is adjusted by a device mounted for rotation in the tube by the first bung and first locator and including a drum provided with indicia visible through the tube wall to indicate the set temperature.