Abstract: A quick service limiting valve includes a housing defining an interior chamber, a brake pipe passageway, and a brake cylinder passageway, a valve member received within the interior chamber of the housing, with the valve member including a body, a first seal, a second seal, and a valve spring. The body of the valve member defines a valve passageway, with the valve member having a first position where the valve passageway allows fluid communication between the brake pipe passageway and the brake cylinder passageway and a second position where the brake pipe passageway is isolated from the brake cylinder passageway. The valve further includes a follower assembly received within the interior chamber of the housing, with the follower assembly including a body, a first check valve, a second check valve, a diaphragm, and a follower spring.

Abstract: A parking brake control module using pneumatic logic to control a parking brake on a railway vehicle. The control module includes a brake pipe passageway, a reservoir passageway, a reservoir release valve, and an actuation cylinder vent valve. The control module applies or releases the parking brake based on pressures of the brake pipe and reservoir. A method uses pneumatic logic to control a parking brake on a railway car. The parking brake is applied when the brake pipe pressure falls below a lower brake pipe pressure threshold and is released when the brake pipe pressure exceeds an upper brake pipe pressure threshold and the reservoir pressure exceeds a reservoir pressure threshold. A hold valve can allow an operator to manually prevent the release of the parking brake.

Abstract: A person identification device 100 has a tag 110 with a code and a tamper evident tether 120 able to secure the tag 110 to a person having a body. The person identification device also has a signal generator 140 able to generate a signal representing the code. The tag 110 has a capacitive contact 130 able to capacitively couple the signal into the body of the person.

Abstract: A brake cylinder maintaining system includes a main valve comprising a first diaphragm, a second diaphragm, and a valve member, with the first diaphragm having a reference pressure on one side of the first diaphragm and a brake cylinder pressure on an opposite side of the first diaphragm. The second diaphragm having a brake cylinder pressure on one side of the second diaphragm with the first diaphragm configured to move between a first position and a second position based on a differential between the reference pressure and the brake cylinder pressure. The valve member is configured to place a brake cylinder in fluid communication with a brake pipe when the first and second diaphragm are each in the second position and configured to isolate a brake cylinder from a brake pipe when the first diaphragm or the second diaphragm are in the first position.

Abstract: An automatic retainer valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a brake pipe and reference volume in fluid communication with a first end of the valve, a brake cylinder in fluid communication with a second end of the valve, and an exhaust port defined in the body and positioned between the first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a brake cylinder pressure exceeding a reference volume pressure. The brake cylinder pressure may push the at least one piston towards the first end of the valve until the brake cylinder pressure equalizes with the reference volume pressure.

Abstract: A person identification device 100 has a tag 110 with a code and a tamper evident tether 120 able to secure the tag 110 to a person having a body. The person identification device also has a signal generator 140 able to generate a signal representing the code. The tag 110 has a capacitive contact 130 able to capacitively couple the signal into the body of the person.

Abstract: An automatic retainer valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a brake pipe and reference volume in fluid communication with a first end of the valve, a brake cylinder in fluid communication with a second end of the valve, and an exhaust port defined in the body and positioned between the first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a brake cylinder pressure exceeding a reference volume pressure. The brake cylinder pressure may push the at least one piston towards the first end of the valve until the brake cylinder pressure equalizes with the reference volume pressure.

Abstract: A hot wheel protection valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a first biasing member positioned on a first end of the at least one piston and biased towards a second end of the at least one piston, a brake pipe in fluid communication with the second end of the at least one piston, a brake cylinder in fluid communication with the second end of the at least one piston, and an exhaust port defined in the body and positioned between first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a combination of brake cylinder pressure and brake pipe pressure exceeding a force exerted by the first biasing member.

Abstract: A hot wheel protection valve arrangement including a hot wheel protection valve, the hot wheel protection valve including a body defining a passageway, a piston slidably positioned within the passageway, a bushing positioned on the piston and within the passageway, a first diaphragm provided on a first end of the piston, the first diaphragm defining a first chamber in the passageway, a second diaphragm provided on a second end of the piston, the second diaphragm defining a second chamber in the passageway, a third chamber being defined between the first diaphragm and the second diaphragm, and an exhaust port defined in the body and in fluid communication with the third chamber, a brake cylinder line that establishes fluid communication between a brake cylinder, the first chamber, and the third chamber; and an emergency reservoir line that establishes fluid communication between an emergency reservoir and the second chamber.

Abstract: Response latencies in a system are reduced by performing a plurality of auctions in parallel using respective processing threads. An ad call associated with an impression for a webpage requested by a user computer is received by the system. Impression information is obtained based on the ad call, which is then used to determine a subset of multiple potential impression providers that are to participate in an auction for the impression. Behavior models may be used to determine the subset, while floor or reserve price models are used to set a floor/reserve price for each potential impression provider in the subset. Bid requests are sent out in parallel to the subset of potential impression providers using the respective floor/reserve prices, with a thread allocated to each bid request. The models can be further trained on information obtained from the received bid responses and impression information.

Abstract: Response latencies in a system are reduced by performing a plurality of auctions in parallel using respective processing threads. An ad call associated with an impression for a webpage requested by a user computer is received by the system. Impression information is obtained from the ad call, which is then used to determine a subset of multiple potential impression providers that are to participate in an auction for the impression. Behavior models are used to determine the subset, while floor or reserve price models are used to set a floor/reserve price for each potential impression provider in the subset. Bid requests are sent out in parallel to the subset of potential impression providers using the respective floor/reserve prices, with a thread allocated to each bid request. The models can be further trained on information obtained from the received bid responses and impression information.

Abstract: A hot wheel protection valve arrangement including a hot wheel protection valve, the hot wheel protection valve including a body defining a passageway, a piston slidably positioned within the passageway, a bushing positioned on the piston and within the passageway, a first diaphragm provided on a first end of the piston, the first diaphragm defining a first chamber in the passageway, a second diaphragm provided on a second end of the piston, the second diaphragm defining a second chamber in the passageway, a third chamber being defined between the first diaphragm and the second diaphragm, and an exhaust port defined in the body and in fluid communication with the third chamber, a brake cylinder line that establishes fluid communication between a brake cylinder, the first chamber, and the third chamber; and an emergency reservoir line that establishes fluid communication between an emergency reservoir and the second chamber.

Abstract: A valve assembly including a housing and a first movable member which divides the housing into a control chamber and a main chamber. A second movable member has a first valve part and a second valve part and is movable to engage the first valve part with a corresponding inlet valve part to substantially prevent flow of fluid into the main chamber via an inlet port. The first movable member is provided with an exhaust valve part and is movable to engage the second valve part of the second movable member to substantially prevent flow of pressurized fluid out of the main chamber via an exhaust port. A support part is secured relative to the housing, there being a first seal between the second movable member and the support part and a second seal between the support part and the first movable member.

Abstract: A dynamic classification dictionary is built for use in profiling and targeting users for additional relevant content. Behavioral data is gathered from user activity, and user documents and actions are categorized. Author-generated document classification information is analyzed and assigned a first taxonomic noun to characterize the document. User-generated tags characterizing a portion of the document are assigned a second taxonomic noun. Search terms that resulted in the user accessing the document are identified and assigned a third taxonomic noun. Attributes related to the manner in which the document was accessed are evaluated and assigned a fourth taxonomic noun. The document is processed using pattern rules to extract a fifth taxonomic noun. The taxonomic nouns are aggregated into a composite set of taxonomic nouns, and the dynamic classification dictionary is built by storing the composite set of taxonomic nouns.

Abstract: A dynamic classification dictionary is built for use in profiling and targeting users for additional relevant content. Behavioral data is gathered from user activity, and user documents and actions are categorized. Author-generated document classification information is analyzed and assigned a first taxonomic noun to characterize the document. User-generated tags characterizing a portion of the document are assigned a second taxonomic noun. Search terms that resulted in the user accessing the document are identified and assigned a third taxonomic noun. Attributes related to the manner in which the document was accessed are evaluated and assigned a fourth taxonomic noun. The document is processed using pattern rules to extract a fifth taxonomic noun. The taxonomic nouns are aggregated into a composite set of taxonomic nouns, and the dynamic classification dictionary is build by storing the composite set of taxonomic nouns.

Abstract: A transition plate connects an electronic manifold to a pipe mounting bracket of a railway brake system and includes a body having a manifold portion that defines a face configured to engage the manifold and a pipe bracket portion that defines a face configured to engage the pipe mounting bracket; ports defined in the manifold face that are configured to align and communicate with ports in the face of the manifold; ports defined in the pipe bracket face that are configured to align and communicate with ports in the face of the pipe mounting bracket; and a plurality of air passages extending through the body for connecting the plurality of ports defined in the manifold face with the plurality of ports defined in the pipe bracket face. The transition plate establishes a pneumatic interface between the electronic manifold and the pipe mounting bracket.

Abstract: A hot wheel protection valve includes a body defining a piston passageway and at least one piston positioned within the piston passageway, a first biasing member positioned on a first end of the at least one piston and biased towards a second end of the at least one piston, a brake pipe in fluid communication with the second end of the at least one piston, a brake cylinder in fluid communication with the second end of the at least one piston, and an exhaust port defined in the body and positioned between first and second ends of the valve. Pressurized fluid may be vented from the brake cylinder via the exhaust port upon a combination of brake cylinder pressure and brake pipe pressure exceeding a force exerted by the first biasing member.

Abstract: A dynamic classification dictionary is built for use in profiling and targeting users for additional relevant content. Behavioral data is gathered from user activity, and user documents and actions are categorized. Author-generated document classification information is analyzed and assigned a first taxonomic noun to characterize the document. User-generated tags characterizing a portion of the document are assigned a second taxonomic noun. Search terms that resulted in the user accessing the document are identified and assigned a third taxonomic noun. Attributes related to the manner in which the document was accessed are evaluated and assigned a fourth taxonomic noun. The document is processed using pattern rules to extract a fifth taxonomic noun. The taxonomic nouns are aggregated into a composite set of taxonomic nouns, and the dynamic classification dictionary is build by storing the composite set of taxonomic nouns.

Abstract: A system for maintaining brake cylinder pressure includes a brake cylinder passage configured to be in fluid communication with a brake cylinder, a brake pipe passage configured to be in fluid communication with a brake pipe and a brake cylinder, a first valve member moveable between a first position and a second position, and a second valve member in fluid communication with a reference pressure. The second valve member is configured to move the first valve member from the first position to the second position based on a differential between a pressure within the brake cylinder passage and the reference pressure, where the brake pipe passage is configured to only supply air from a brake pipe to a brake cylinder when the first valve member is in the second position.

Abstract: A system for maintaining brake cylinder pressure comprises a maintaining valve, a brake pipe, an emergency reservoir, and a brake cylinder configured to be in fluid communication with the brake pipe and the emergency reservoir. The brake pipe is configured to sustain a predetermined pressure within the brake cylinder during a brake application based on a differential between a pressure of the emergency reservoir and a pressure of the brake pipe.