Abstract: A ram air turbine with a turbine assembly and a power train, the turbine assembly only coupling to the entire power train upon reaching a desired rotational speed of the turbine assembly, the ram air turbine having a clutch mechanism, the engagement of which couples the turbine assembly to at least a portion of the power train, and a speed control mechanism that engages the clutch mechanism only when the turbine assembly attains at least the desired rotational speed.

Abstract: A ram air turbine (RAT) includes a movable turbine support structure that is prevented from moving to a stowed position by a stow abort mechanism when turbine blades are not locked in a desired position. The stow abort mechanism includes a pawl that is driven by a cam on a release lever. The release lever is movable in response to a position of a release pin that prevents rotation of a turbine drive shaft from a desired orientation that locks the turbine blades in a desired position required for stowage. Disengagement of the release pin causes the stow abort mechanism to maintain a position where the pawl blocks movement to the deployed position. Engagement of the release pin to prevent rotation results in movement of the pawl to a position that provides for movement to the stowed position.

Abstract: An example a ram air turbine assembly (RAT) is mounted to an airframe and provides both electric power and hydraulic pressure. A turbine drives a drive shaft about an axis transverse to rotation of the turbine. The drive shaft in turn drives both a generator and a hydraulic pump at a common speed.

Abstract: A disclosed ram air turbine assembly includes a movable support structure that is prevented from moving to a stowed position by a stow abort mechanism that prevents movement to the stowed position when the turbine is not in a desired orientation.

Abstract: A hydraulic system for a ram air turbine includes a hydraulic pump having a high pressure fluid outlet port, a housing, a pivot post arranged to pass through the housing and defining a mechanical pivot relative to the housing about an axis, a transfer tube positioned between the high pressure fluid outlet port of the hydraulic pump and a port in the housing for the high pressure fluid outlet path, and seal elements positioned at or near opposite ends of the transfer tube. A fluid inlet path and a high pressure fluid outlet path pass through the housing and the pivot post. The transfer tube has a crowned end.

Abstract: A ram air turbine system includes an actuator having a threaded portion, a rod having a threaded region at or near one end and an eyelet at an opposite end, and a bushing. The bushing has a first thread engaged with the threaded portion of the actuator, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the actuator and the rod through the bushing. The first and second threads of the bushing have different pitches.

Abstract: An example ram air turbine drive shaft assembly includes a drive shaft that rotates about an axis to drive a hydraulic pump and a generator. The drive shaft has an interruption that redirects a fluid flowing from the hydraulic pump to the generator when the drive shaft is rotated.

Abstract: An example ram air turbine biasing assembly includes a support member that holds a biasing member. The biasing member biases a component of a ram air turbine. The support member includes a step that limits movement of the component toward the biasing member.

Abstract: An example ram air turbine stow abort assembly includes a release pin movable between an engaged position that prevents rotation of a drive shaft and a released position that allows rotation of the drive shaft. A release lever is rotatable about an axis in response to the release pin being in the engaged position or the released position. A pawl has a link to the release lever. The link causes the pawl to move toward the axis from a locking position to a clearance position. The pawl is positioned to engage a lock when in the locking position to prevent movement of the ram air turbine assembly to a stowed position when the turbine blades are misaligned.

Abstract: A ram air turbine gearbox housing includes a housing body that has a first flange that defines a first plane and a second flange that defines a second plane that is transverse to the first plane. The housing body extends around an axis and has a first axial end and an opposite, second axial end that are each open to an internal cavity of the housing body. The housing body includes a radially-enlarged section at least partially defining an oil sump within the internal cavity of the housing body.

Abstract: An example ram air turbine generator assembly includes a generator housing that holds a generator in axial alignment with a hydraulic pump. The generator housing includes a wall having contacting portions that contact a stator of the generator and spaced portions that are radially spaced from the stator. The generator wall is designed to be strong enough to withstand HLSD and windmilling vibrations, while flexible enough to accommodate thermal expansion.

Abstract: A method including obtaining metadata specifying screens based on a business logic of the matter management workflow, generating, based on the metadata, the screens each including screen objects, where the matter management workflow includes a sequence of the screen objects specified by the metadata based on the business logic, receiving a matter management user input via the screen objects to navigate the matter management workflow, receiving a screen tester user input specifying a test instruction including a first specification based on the screen objects, generating, using the first specification and without further user intervention, a test sequence including a second specification based on the metadata, applying the test sequence to the screen objects to generate a first result depicting an evaluation of navigating the matter management workflow according to the business logic, and generating an alert in response to the first result indicating a violation to the business logic.

Abstract: An electronic content exchange system includes a communications medium and at least two storage media. Each storage media includes an interface configured to send and receive messages, a memory storing a current content, a respective unique identifier, and a log of content transfers; and a controller. The controller receives a content transfer message including at least a message content to be transferred, and executes a Transfer-in process to increase the current content by the message content to be transferred and record information of the transfer in the log. The controller receives, via the interface, a content transfer request message including at least a message content to be transferred, and executes a Transfer-out process to generate and send a content transfer message including the message content to be transferred, decreasing the current content by the message content to be transferred; and recording information of the transfer in the log.

Abstract: A secure asset storage media. A secure module includes a memory storing at least a DuplicateCounter and a HashLog, the HashLog comprising a respective hash of each value transfer message sent or received by the secure asset storage media, the DuplicateCounter storing a count of duplicate hash values in the HashLog. A non-volatile memory is disposed external to the secure module. The non-volatile memory stores a transaction log comprising a copy of each value transfer message sent or received by the secure asset storage media and its respective hash value. A controller is configured to control communication between the secure module and the non-volatile memory to record information of a received value transfer message in the secure module and the transaction log.

Abstract: Methods and apparatus, including computer program products, implementing and using techniques for processing a federated query in a federated database system. A federated query is received at a federated database server. A federated query execution plan is generated based on the received federated query. The federated query execution plan defines one or more source servers of the federated database and a unique subquery to be executed on each of the source servers. The subqueries are distributed to the source servers in accordance with the federated query execution plan. The respective subqueries are executed asynchronously at the source servers. The subquery results are passed to a first designated source server defined in the federated query execution plan. The subquery results are joined and aggregated at the first designated source server into a final query result. The final query result is returned to the federated database server.

Abstract: A method for determining a load on a driven component of a rotating or stationary electromechanical system includes locating a rotationally flexible shaft portion in operable communication with a driving component having a drive rotor rotable about an axis and the driven component. The shaft portion is operably connected thereto. Angular positions of the drive rotor and the driven component are determined. A magnitude of a load on the driven component is calculated based on a difference in angular position of the drive rotor and the driven component and a known torsional rigidity of the shaft portion.

Abstract: A security domain control method includes defining a sequential series of security domains; designating one of the security domains as a current domain; generating a plurality of security tokens under the current security domain, each security token being configured to enable a party to exchange cryptographically secured messages with another party that is holding any one of: a token generated under the current security domain; a token generated under at least one next security domain in the series; and a token generated under at least one previous security domain in the series; and subsequently designating a next one of the security domains in the series as a current domain.

Abstract: An electronic asset exchange system includes a communications medium and at least two electronic purses. Each electronic purse includes an interface configured to send and receive messages, a memory storing a current asset value amount, a respective unique identifier, and a log of asset transfers; and a controller. The controller receives an asset transfer message including at least an asset value amount to be transferred, and executes a Transfer-in process to increase the current asset value amount by the asset value amount to be transferred and record information of the asset transfer in the log.

Abstract: An electronic content storage and exchange system includes an interface configured to send and receive messages; a database and a controller. The database includes a plurality of records, each record representing a respective virtual storage media and including at least: a respective unique identifier assigned to the virtual storage media; a respective Private key and certificate assigned to the virtual storage media; a current content value, and a log of content transfers. The controller executes transfer-in and transfer-out processes in respect of each of the virtual storage media. The transfer-in process includes steps of: receiving a content transfer message including at least a message content to be transferred and the respective identifier assigned to a recipient virtual storage media; accessing the record representing the recipient virtual storage media,; and storing the message content in the current content of the recipient virtual storage media.

Abstract: A method of detecting unauthorized activity in an electronic message transfer system comprising a plurality of devices, each device being configured to generate and receive cryptographically secured transfer messages for exchanging content with other devices in the system. In each device, audit information is accumulated in a memory of the device. The device periodically forwards at least part of its accumulated audit information to a secure server.