Abstract: A system and method for automatically adjusting a pressure within a variable volume of a hydraulic feed tube while the variable volume of the hydraulic feed tube is changing. Inputs are used to determine the appropriate pressure adjustments for the hydraulic feed tube, which is adjusted by a pressure reducing valve, wherein control of the pressure reducing valve is updated continuously by a control module.

Abstract: Systems and methods for configuring a cryptographic system, such as an avionic data transfer system associated with an aircraft, are provided. More particularly, systems and methods can be used to assemble a cryptographic key configuration (CKC) for use in a cryptographic system. A CKC can include various components for configuration of a cryptographic system. An administrator can generate CKCs for multiple host systems via a user interface (e.g., a graphical user interface) at a terminal and can deliver the CKCs to the host systems via an automated process by way of, for instance, a removable data cartridge.

Abstract: Systems and methods for filtering aircraft messages are provided. In one embodiment, the method can include receiving a message including a plurality of data fields containing data associated with the message. The method can include accessing a set of configuration data. The set of configuration data can include a set of data identifying one or more potential message structures and one or more parameters. The parameters can include one or more conditions for processing the data fields. The method can include determining a message structure of the message based at least in part on the data fields and the first set of data identifying one or more potential message structures. The method can include processing the message based at least in part on the message structure and the parameters. The method can include generating a filtered message that is based at least in part on the processed message.

Abstract: Systems and methods for managing cryptographic keys in an avionic data transfer system are provided. A host device associated with the avionic data transfer system can receive one or cryptographic keys via a key fill interface. For instance, in one embodiment, the host device can receive one or more cryptographic keys from a removable data cartridge. The host device can act as a key server for other cryptographic units associated with the avionic data transfer system via a data bus. For instance, the host device can distribute one or more cryptographic keys to other cryptographic units associated with aircraft via an aircraft bus. The other cryptographic units can use the one or more cryptographic keys for cryptographic processing of data.

Abstract: Systems and methods for filtering aircraft messages are provided. In one embodiment, the method can include receiving a message including a plurality of data fields containing data associated with the message. The method can include accessing a set of configuration data. The set of configuration data can include a set of data identifying one or more potential message structures and one or more parameters. The parameters can include one or more conditions for processing the data fields. The method can include determining a message structure of the message based at least in part on the data fields and the first set of data identifying one or more potential message structures. The method can include processing the message based at least in part on the message structure and the parameters. The method can include generating a filtered message that is based at least in part on the processed message.

Abstract: Systems and methods for configuring a cryptographic system, such as an avionic data transfer system associated with an aircraft, are provided. More particularly, systems and methods can be used to assemble a cryptographic key configuration (CKC) for use in a cryptographic system. A CKC can include various components for configuration of a cryptographic system. An administrator can generate CKCs for multiple host systems via a user interface (e.g., a graphical user interface) at a terminal and can deliver the CKCs to the host systems via an automated process by way of, for instance, a removable data cartridge.

Abstract: Systems and methods for managing cryptographic keys in an avionic data transfer system are provided. A host device associated with the avionic data transfer system can receive one or cryptographic keys via a key fill interface. For instance, in one embodiment, the host device can receive one or more cryptographic keys from a removable data cartridge. The host device can act as a key server for other cryptographic units associated with the avionic data transfer system via a data bus. For instance, the host device can distribute one or more cryptographic keys to other cryptographic units associated with aircraft via an aircraft bus. The other cryptographic units can use the one or more cryptographic keys for cryptographic processing of data.

Abstract: A method for rapid restarting of a flight control system, wherein the flight control system comprises a processor, is provided. The method includes storing at least one executable program on a memory device and copying the at least one executable program to a first random access memory (RAM) sector and a second RAM sector of a RAM memory device at a predetermined time. The method also includes copying the at least one executable program from the second RAM sector to the first RAM sector upon a restart of the processor and reinitializing processor operation by executing the at least one executable program copied from the second RAM sector to the first RAM sector.

Abstract: A method for rapid restarting of a flight control system, wherein the flight control system comprises a processor, is provided. The method includes storing at least one executable program on a memory device and copying the at least one executable program to a first random access memory (RAM) sector and a second RAM sector of a RAM memory device at a predetermined time. The method also includes copying the at least one executable program from the second RAM sector to the first RAM sector upon a restart of the processor and reinitializing processor operation by executing the at least one executable program copied from the second RAM sector to the first RAM sector.

Abstract: Various embodiments of a food serving arrangement and its components are disclosed.

Abstract: The hearing aid system includes a hearing aid case which is designed to be positioned behind the ear of a user, a tube for conducting sound from the case to the ear canal of the user, and a eartip for anchoring the end of the tube within the ear canal of the user. The tube is formed in a preformed shape of a material with sufficient rigidity to support the hearing aid in a proper position on the user's ear. The eartip may be one of several different designs which secures an end of the tube in place in the ear canal in a comfortable manner without the need for an expensive custom made ear mold and without complete occlusion of the ear canal. A combination of the light weight and small size of the case, the rigidity of the preformed tube, and one of the eartips for anchoring the tube in the ear canal allow the system to be held in place securely without the need for either an inflexible and aesthetically unpleasing ear hook or an expensive custom made ear mold.

Abstract: The hearing aid system includes a hearing aid case which is designed to be positioned behind the ear of a user, a tube for conducting sound from the case to the ear canal of the user, and a eartip for anchoring the end of the tube within the ear canal of the user. The tube is formed in a preformed shape of a material with sufficient rigidity to support the hearing aid in a proper position on the user's ear. The eartip may be one of several different designs which secures an end of the tube in place in the ear canal in a comfortable manner without the need for an expensive custom made ear mold and without complete occlusion of the ear canal. A combination of the light weight and small size of the case, the rigidity of the preformed tube, and one of the eartips for anchoring the tube in the ear canal allow the system to be held in place securely without the need for either an inflexible and aesthetically unpleasing ear hook or an expensive custom made ear mold.

Abstract: A rotary-actuated electrical switch which is adapted to be utilized for electrical current and preferably alternating current circuits. The operation of the switch is accomplished through the rotation of a handle and the therefrom resulting movements and forces applied to a unique spring-loaded cam and brush lifter assembly.

Abstract: An actuator plate type electrical switch employs an actuating mechanism which includes an overcentering cam, sleeve, actuator plate, plunger, and biasing spring. The cam is rotatable between first and second overcentered positions and has an actuating lobe aligned with a contact assembly causing the assembly to assume respective contact and non-contact positions upon rotation of the cam to corresponding first and second overcentered positions. The sleeve has a central passage and a transverse slot communicating with the passage. The cam is received through the transverse slot. The sleeve also mounts the actuator plate outwardly from the cam. The sleeve and actuator plate are pivotal together about an axis which extends parallel to the cam rotational axis. The plunger, biased by the spring toward and into continuous engagement with the center of the cam, is slidably mounted in the sleeve passage for reciprocal movement toward and away from the cam.