摘要:
A process for forming a multilayer composite coating on a substrate is provided. The process includes forming an electrodeposition coating layer on the substrate by electrodeposition of a curable electrodepositable coating composition over at least a portion of the substrate. Optionally, the coated substrate is heated to a temperature and for a time sufficient to cure the electrodeposition coating layer. A basecoating layer is formed on the electrodeposition coating layer by depositing an aqueous curable basecoating composition directly onto at least a portion of the electrodeposition coating layer. Optionally, the basecoating layer is dehydrated. A top coating layer is formed on the basecoating layer by depositing a curable top coating composition which is substantially pigment-free directly onto at least a portion of the basecoating layer. The top coating layer, the basecoating layer, and, optionally, the electrodeposition coating layer are cured simultaneously.
摘要:
The invention provides a surveillance arrangement, and in particular an airborne surveillance arrangement, in which a television display of a scene is brightened up, by means of infra-red detectors, to emphasize heat emitting targets.In one example of airborne surveillance system, a linear array of infra-red detectors is arranged to view part of a scene viewed by a television camera, with the same horizontal field of view at a desired target range. In front of the array of detectors a light chopper is provided so that the output of each detector is a modulated carrier. The output of each detector is applied to a store, via individual impedance transformers, narrow bandpass filters and demodulators. Between each demodulator and the store, individual sharp out-off low pass filters and threshold detectors may be provided to provide a degree of discrimination against spurious responses. The store is read-out under the control of a sequence timing unit which is synchronized with the synchronizing signal generator of the television camera and the video output of the latter is mixed with the output from the store prior to application to a display unit so that the display provided is a scene of an area towards which the aircraft is flying with heat emitting targets highlighted.
摘要:
A mooring connector or pipeline recovery tool comprising a mandrel (10) around which is concentrically disposed a ball cage (11) having balls (12) protruding therefrom so that relative longitudinal movement of the mandrel (10) and ball cage (11) causes the balls to ascend ramped surfaces of the mandrel (10) thus to protrude outwardly through the ball cage (11). The conventional arrangement of balls in regular rows and columns is replaced by helical rows or random arrays of the balls thus to avoid excessive grooving and deformation of the wall of a receptor into which the connector is inserted.
摘要:
A mooring connector or pipeline recovery tool comprising a mandrel (10) around which is concentrically disposed a ball cage (11) having balls (12) protruding therefrom so that relative longitudinal movement of the mandrel (10) and ball cage (11) causes the balls to ascend ramped surfaces of the mandrel (10) thus to protrude outwardly through the ball cage (11). The conventional arrangement of balls in regular rows and columns is replaced by helical rows or random arrays of the balls thus to avoid excessive grooving and deformation of the wall of a receptor into which the connector is inserted.
摘要:
The invention relates to the production of silica reinforced rubber incorporating a novel azo-silane coupling agent which does not depend on the vulcanization reaction to effect coupling to the rubber. The novel coupling agents are of the general formula:Y -- X -- CO -- N .dbd. N -- CO -- X.sup.1 -- Zwhere X and X.sup.1 are the same or different and each is an imino group, an oxygen atom, or a substituted or unsubstituted methylene group; Y is a substituted or unsubstituted alkyl, aryl or aralkyl group or is the same as Z; and Z as an alkyl, aryl or aralkyl group which has an substituent at least one silane group of the formula: --Si(OR).sub.3 or --OSi(OR).sub.3 in which R is a straight or branched chain alkyl group. The azo-silane is typically used in amounts of from .1 to 10 pphr. Silica reinforced rubber vulcanizates produced using the azo-silane can have improved properties e.g. abrasion resistance, scorch resistance and resilience as compared with vulcanizates made using conventional coupling agents.
摘要:
A method to simultaneously control a plurality of autonomous vehicles, wherein the method provides one or more autonomous vehicles, an autonomous vehicle controller comprising a controller processor and a controller non-transitory computer readable medium, having controller computer readable code encoded herein, and a controller task queue. The method wirelessly provides a task to an autonomous vehicle, and wirelessly provides a task completion message from that autonomous vehicle to the autonomous vehicle controller.