Abstract:
A method and system for the wireless interrogation of a body immersed in a circulatory bath or a tank for heating. More specifically, the system may include a probe having multiple sensors for gauging a core temperature associated with the immersed body in combination with one or more wireless connections leading to a controller (on a circulator or a user interface) such that the user can determine temperature information (e.g., core temperature) of the body being immersed.
Abstract:
A piezoelectric resonator (12) is embedded within an electrically insulating substrate assembly (36), such as a multilayer printed circuit board. Electrical conductors (22,24) extend from electrodes of the resonator (12) through holes (32) in upper and lower layers (26,29) of the substrate assembly (36) and connect to electrical traces (34). The lower layer (29) has a pocket which forms a cavity (38) within the substrate assembly (36) adapted to contain the piezoelectric resonator (12). The conductors (22,24) support the resonator (12) such that the resonator (12) does not contact the assembly (36). As the resonator is substantially larger than associated electrical components, embedding it within a substrate eliminates the size penalty that is normally required to mount a large piezoelectric resonator.
Abstract:
A bobbin assembly is provided that is suitable for dispensing webbed material using a power driven coupling in a toilet seat assembly having a housing with wall portions. The bobbin assembly comprises an extruded thermoplastic hollow tube having a plurality of splines disposed longitudinally therein and an end cap assembly adapted for connection to the wall portion. The splines are constructed and arranged in mating inter-engagement with the power driven coupling. The end coupling is spring biased toward the hollow tube to mate with the hollow tube. The bobbin assembly allows for identical supply and take-up bobbins.
Abstract:
A piezoelectric resonator (10) having a sacrificial mass-loading layer (16). Material is removed from the mass-loading layer (16) to raise a resonator frequency to a desired target. The sacrificial layer (16) is of a dense material, such as silver or gold, but is of such a relative thin layer that it can be used on high frequency aluminum electrodes (14) of a resonator (10) without increasing adverse spurious frequency problems. It is not necessary that the mass-loading layer (16) be conductive. In addition, the silver or gold sacrificial layer (16) can be removed by ion milling at practical and economical rates, unlike aluminum or aluminum oxide. Preferably, a diffusion barrier (18) is interposed between the electrodes (14) and the mass-loading layer (16).
Abstract:
A resonator (104) including a piezoelectric plate (102) with an electrode (108) having a random pattern (100) along a portion of an edge of the electrode (108). The random pattern (100) dampens or destructively interferes with undesirable and inharmonic vibrational modes. For example, a rectangular AT-cut quartz resonator, which vibrates in a thickness-shear mode may also possess undesirable flexure and face-shear modes. These modes not only present undesirable spurious frequencies, they also change over temperature, disturbing a frequency-ternperature response of the resonator. The random pattern (100) causes diffuse and/or specular scattering to reduce these undesirable modes, providing a more uniform frequency-temperature response which is beneficial in temperature compensated crystal oscillator applications.
Abstract:
A system and method for using a circuit for providing power from multiple sources for a variable audio amplifier. The system includes a battery, a power supply and a controller which provides a power supply for the variable load demands of the amplifier, while still maintaining a substantially constant battery charge over an extended period of time.
Abstract:
A piezoelectric resonator (10) with an attenuated spurious response. The resonator (10) includes a piezoelectric crystal plate (12) having opposite surfaces (14, 16), an electrode (18, 24) positioned and overlying relationship on each of the opposite surfaces (14, 16), the electrodes (18, 24) being substantially coextensive and opposite, and providing a primary frequency mode of operation and spurious modes upon suitable energization, and a number of mass loading structures (34) on at least one of the surfaces (14, 16) substantially surrounding at least one of the electrodes (18, 24).
Abstract:
A method and system for the wireless interrogation of a body immersed in a circulatory bath or a tank for heating. More specifically, the system may include a probe having multiple sensors for gauging a core temperature associated with the immersed body in combination with one or more wireless connections leading to a controller (on a circulator or a user interface) such that the user can determine temperature information (e.g., core temperature) of the body being immersed.
Abstract:
A system and method for using a circuit for providing power from one or more battery packs charged by a AC-mains-provided electrical connection and which supply power to a hi-power, non-portable audio amplifier. The system includes a power supply sized to satisfy long time-basis average demands, a battery pack and with a controller which buffers or back-ends a power supply which is not otherwise capable of satisfying the variable load peak demands that an audio source imposes on the amplifier, while still maintaining a substantially constant battery charge over an extended period of time.
Abstract:
A toilet seat assembly for mounting to the toilet bowl can be assembled and disassembled by aligning vanous components of the assembly at predetermined angles with respect to one another. The toilet seat assembly includes a housing defining a cavity for receiving a sleeve dispensing apparatus and a pair of mounting forks. The housing is rotatable between a predetermined assembly angle position where the housing can be installed or removed from the pair of mounting forks and positions beyond the assembly angle where the housing is securely seated within the pair of mounting forks.