Abstract: The benefits of rapid modeling and prototyping of a hearing instrument housing can be increased by fashioning the housing as a monolithic unit, incorporating the faceplate as an integral part of the housing. An opening in the faceplate region of the housing can be created to accept a module containing various electronic components of the hearing instrument.

Abstract: A microphone of the dual-inlet type is installed in an In-The-Ear (“ITE”) hearing aid. First and second outwardly-diverging channels are located in the faceplate, to connect the inlets of the microphone to two spaced-apart ports in the faceplate.

Abstract: A programming interface for programming hearing aids is in PCMCIA compact flash format and meets the requirements of IEC 60601-1, type BF and UL 2601-1 when connected to a desktop or laptop computer.

Abstract: An expense allocation method utilizes matrix multiplication to transform a set of reciprocal or cascading allocation rules into a new set of one-step allocation rules. The new set of rules reallocates amounts directly to the ultimate destination without going through numerous intermediate levels of reallocation. By taking advantage of the specific structure of the matrix, and partitioning the matrix into four (4) subparts, the matrix multiplication process is greatly simplified. The expense allocation method can be easily and efficiently implemented on a computer system, including computers based upon parallel or vector architectures. This invention permits most allocation work to be done before the end of an accounting period, allowing end-of-period accounting work to be completed sooner. Alternatively, expenses can be allocated as they occur, rather than waiting until the end of a period.

Abstract: A heading indicator is disclosed which utilizes a one-degree-of-freedom platform stabilized by a two-degree-of-freedom dry flexure gyro. The output of one of the sensitive axis is coupled through an amplifier to the corresponding torquer in the gyro and selectively through another amplifier to the opposite torquer. The other sensitive axis output is coupled through an amplifier to the platform. The indicator initializes to true north and is then switched to a directional gyro mode.

Abstract: The disclosure describes a memory system having a large bit capacity, capable of detecting, locating, and correcting errors. The memory is subdivided into several identical storage matrices wherein parity calculations are performed in the vertical direction within a matrix and in the horizontal direction across a series of matrices. The system also has provision for self-repairs.

Abstract: This solderless electrical connector for an electrical cable consists of a helical spring and loop joined together to form a ring. The helical spring provides a snug fit on a matching cylindrical post while offering strain relief protection for the electrical cable, which is routed through the helix of the spring.