Abstract: A toy comprises a resiliently deformable member, a first contactor defining a first contacting surface, and a second contactor defining a second contacting surface. At least one of the first and second contactors defines a concave surface. The resiliently deformable member supports the first and second contactors for movement along a main axis between an engaged configuration in which the first contacting surface is contact with the second contacting surface and a disengaged configuration in which the first contacting surface is disengaged from the second contacting surface. The resiliently deformable member biases the first and second contactors in opposite directions along the main axis. Application of force to displace the first and second contactors along the main axis creates a sound when the first and second contactors are disengaged from each other.

Abstract: A method of heating a fluid stream for a power plant comprises diverting a portion of a main flow of flue gas from a power plant at a first pressure (P1), flowing the diverted flue gas through a heat exchanger, flowing an auxiliary fluid stream through the heat exchanger, and transferring heat from the diverted flue gas into the auxiliary fluid stream in the heat exchanger to raise a temperature of the auxiliary fluid stream from a first temperature (T3) to a second temperature (T4), while lowering a first temperature of the diverted flue gas (T1) to a second temperature (T2). The diverted flue gas is then returned to the main flow of flue gas in the power plant at a second pressure (P2). The method of flue gas flow through the heat exchanger may be accomplished by adding a self-contained flow path from a boiler higher pressure (P1) zone to a lower pressure (P2) zone.

Abstract: A toy comprises a resiliently deformable member, a first contactor defining a first contacting surface, and a second contactor defining a second contacting surface. At least one of the first and second contactors defines a concave surface. The resiliently deformable member supports the first and second contactors for movement along a main axis between an engaged configuration in which the first contacting surface is contact with the second contacting surface and a disengaged configuration in which the first contacting surface is disengaged from the second contacting surface. The resiliently deformable member biases the first and second contactors in opposite directions along the main axis. Application of force to displace the first and second contactors along the main axis creates a sound when the first and second contactors are disengaged from each other.

Abstract: A toy comprises a resiliently deformable member, a first contactor defining a first contacting surface, and a second contactor defining a second contacting surface. At least one of the first and second contactors defines a concave surface. The resiliently deformable member supports the first and second contactors for movement along a main axis between an engaged configuration in which the first contacting surface is contact with the second contacting surface and a disengaged configuration in which the first contacting surface is disengaged from the second contacting surface. The resiliently deformable member biases the first and second contactors in opposite directions along the main axis. Application of force to displace the first and second contactors along the main axis creates a sound when the first and second contactors are disengaged from each other.

Abstract: A method of heating a fluid stream for a power plant comprises diverting a portion of a main flow of flue gas from a power plant at a first pressure (P1), flowing the diverted flue gas through a heat exchanger, flowing an auxiliary fluid stream through the heat exchanger, and transferring heat from the diverted flue gas into the auxiliary fluid stream in the heat exchanger to raise a temperature of the auxiliary fluid stream from a first temperature (T3) to a second temperature (T4), while lowering a first temperature of the diverted flue gas (T1) to a second temperature (T2). The diverted flue gas is then returned to the main flow of flue gas in the power plant at a second pressure (P2). The method of flue gas flow through the heat exchanger may be accomplished by adding a self-contained flow path from a boiler higher pressure (P1) zone to a lower pressure (P2) zone.

Abstract: A toy comprises a resiliently deformable member, a first contactor defining a first contacting surface, and a second contactor defining a second contacting surface. At least one of the first and second contactors defines a concave surface. The resiliently deformable member supports the first and second contactors for movement along a main axis between an engaged configuration in which the first contacting surface is contact with the second contacting surface and a disengaged configuration in which the first contacting surface is disengaged from the second contacting surface. The resiliently deformable member biases the first and second contactors in opposite directions along the main axis. Application of force to displace the first and second contactors along the main axis creates a sound when the first and second contactors are disengaged from each other.

Abstract: An interactive element for use with an interactive touch screen comprises a conductive body element and a lens. The conductive body element is adapted to interactively engage the interactive touch screen. The lens is supported by the conductive body element. The conductive body element supports the lens relative to the interactive touch screen such that light emitted by the interactive touch screen enters a first portion of the lens and is visible at a second portion of the lens. The conductive body interacts with the interactive touch screen to cause the interactive touch screen to emit light such that light enters the first portion of the lens.

Abstract: A propeller has a plurality of blades extending radially outwardly of a hub and a plurality of cups respectively affixed to the plurality of blades. Each of the plurality of blades has a facing surface and a back surface. The blade has a leading edge and a trailing edge. The cup is affixed to the back surface of the blade in spaced relation to the trailing edge and in spaced relation to the outer edge. The cup is affixed to a greatest thickness of the blade. The cup has a curvature corresponding to a curvature of the blade. The blade is positioned at approximately ? of a width dimension from the leading edge.