Abstract: A method bilayer composite thin-film beam structure is described. The structure incorporates a bulk phase change material as small inclusions in one layer of a bimorph. The structure, also referred to as a “phase change composite bimorph” or “PCBM”, curls abruptly, and reversibly, at a phase transition temperature. Large curling and effective expansion coefficients are demonstrated. The PCBMs may be employed in various self-assembly mechanisms and actuators.

Abstract: A bilayer composite thin-film beam structure is described. The structure incorporates a bulk phase change material as small inclusions in one layer of a bimorph. The structure, also referred to as a “phase change composite bimorph” or “PCBM”, curls abruptly, and reversibly, at a phase transition temperature. Large curling and effective expansion coefficients are demonstrated. The PCBMs may be employed in various self-assembly mechanisms and actuators.

Abstract: An acoustic device configured for use with an audio source. The acoustic device includes a stem portion and multiple branches forming a cavity for passage of an audio signal when connected to an audio source. An array of multiple acoustic devices or nodes may be physically connected to form a tree-like structure for providing amplified sound in an aesthetically and tonally pleasing manner which fills its surrounding with sound. In view of the physical connectability of the individual nodes, an audio outputting device may be form which is easily modified, scaled, and/or re-configured to adjust its tonal properties and directionality.

Abstract: In accordance with the invention, thin bodies of plastic, such as sheets or strands, with substantially different thermal coefficients of expansion are laminated together to make plastic bodies which move in response to heat. The movable plastic bodies can be secured to a suitable base to make a variety of devices for amusement, temperature monitoring and display. Applications for amusement include a thermally blooming flower, a solar activated butterfly, and curling hair for a doll. Applications for temperature monitoring include safety lids for drinking cups, sunlight blockers and ventilators.

Abstract: In accordance with the invention, thin bodies of plastic, such as sheets or strands, with substantially different thermal coefficients of expansion are laminated together to make plastic bodies which move in response to heat. The movable plastic bodies can be secured to a suitable base to make a variety of devices for amusement, temperature monitoring and display. Applications for amusement include a thermally blooming flower, a solar activated butterfly, and curling hair for a doll. Applications for temperature monitoring include safety lids for drinking cups, sunlight blockers and ventilators.

Abstract: In accordance with the invention, a digital timepiece is provided with a mode of operation which presents a time message indicative of the approximate time. The mode can be implemented by adding to a digital timekeeping circuit, a digital conversion circuit to generate the messages. A visual display on the timepiece face displays the message. In a preferred embodiment the precise time can be displayed as an alternative mode.