摘要:
L'invention concerne un procédé de travail à l'explosif utilisé dans des mines, dans lequel des trous de mines sont chargés de couches alternées de propulseurs ANFO et AP. On utilise une charge primaire afin de faire détonner la colonne de la composition. Le propulseur à vitesse de détonnation lente améliore l'explosion ANFO, et il produit un gaz sous haute pression ainsi que des températures élevées afin de briser et de fragmenter la roche, tout en réduisant au minimum les projections de roches, les vibrations dans le sol et le bruit dans l'air.
摘要:
Une composition solide de marquage comprend entre 15% et 50% en poids d'une résine de polyéthylène ayant une densité comprise entre 0,93 et 0,96 environ. En outre, cette composition comprend entre 20% et 55% en poids environ d'un plastifiant compatible, et entre 3% et 20% en poids de la substance active d'un pigment. Facultativement, la composition peut comprendre un agent dispersant du pigment, tel qu'un acide gras. D'autres additifs qui peuvent être utilisés avec avantage sont des agents d'allongement ou des charges, des stabilisateurs de l'oxydation, des stabilisants UV et des agents de démoulage. On utilise cette composition pour produire des instruments de marquage ayant une résistance à l'effaçement, une facilité d'application, une résistance à la rupture de la tige et de la pointe étonnamment améliorées, accompagnées d'une élimination totale de l'efflorescence.
摘要:
A method and apparatus for observing exhibit sites which provide the ability to overlay computer generated images and sound on a live exhibit to create and present these overlays on demand in varying levels of detail for use by the general public, in indoor and outdoor settings, without requiring instruction, operators, fitting, training, or supervision. The viewing device (100) may comprise a viewing portion (350), a processing portion, a displaying portion, and an audio portion (310). Each of these components combines to provide the user with the ability to view an actual exhibit site overlaid with informational or historic recreations to enhance the exhibit experience, as opposed to a separate display booth or other means which take the exhibit viewer's attention away from the actual exhibit site.
摘要:
A tilt tray sorting system with a high speed, reliable, mechanical actuator for tilting the trays, suitable for tilting trays carried on a belt conveyor. A plurality of tilt tray assemblies include an actuator, mounted for movement with a tilt tray and for movement relative to the tray. The actuator includes a trigger arm extending below the tray, preferably through an opening in a belt that carries the tray. A trip mechanism is selectively positioned in the path of the trigger arm to move the actuator and tilt the tray.
摘要:
A chuck (10) including a body (16) and jaws (18) slidably positioned in angled passageways (30) formed in the body (16). The chuck (10) further includes a nut (60) rotatably mounted relative to the body (16) and in engagement with threads (34) on the jaws (18). A generally cylindrical sleeve (12) is disposed in driving arrangement with the nut (60) and overlying the nose section (56) of the body (16) so that when the sleeve (12) is rotated with respect to the body (16), the jaws (18) will be moved thereby to grip the shaft of a tool. A spring member (80) is biased to engage the sleeve (12) and is disposed selectively rotatably with respect to the nut (60). When the nut (60) is tightened, the spring member (80) becomes locked to the body (16), which has an engagement portion (17) that facilitates this locking relationship. When so locked, the nut (60) is restrained from loosening during vibration of the chuck (10) in use.
摘要:
An air dryer (24) for a vehicle air braking system comprises a container (26) having first, second and third compartments (34, 50, 48), the first compartment (34, 34a) having an upstream inlet (28) for connection to a source of air under pressure, a vent (44) for connection to the exterior of the container (26) and a desiccant therein, the second compartment (50) comprising a chamber having an inlet (36, 36a) downstream of the first compartment (34, 34a) with non-return means (38, 38a) therein, a fluid connection (40, 40a) to the first compartment (34, 34a) having a restrictor (42, 42a) therein, and the third compartment (48) comprising a chamber having an inlet (54) downstream of the second compartment with non-return means (52) therein and an outlet (30) for connection to a fluid pressure using device.
摘要:
A covering system for covering a transportable container (3) with a tarp (30). The covering system includes a covering device (2) provided with an extendable tarp (30). The covering device (2) is mounted on a support structure (9) which is manipulable to position the covering device (2) to enable covering of a container (3) which is unsupported by the vehicle (4). The covering device (2) is preferably mounted to a hook arm (9) which also functions to load the container (3) onto the vehicle (4) after the container (3) is covered.
摘要:
A rechargeable metal-air battery having a housing, an air flow path, and at least one metal-air cell positioned within the housing. An air movement device communicated with the housing. The metal-air cell generates oxygen and hydrogen during cell charging. The air movement device creates a pulsating air flow within the air flow path for directing a flow of the generated gases.
摘要:
A butterfly valve (100) for use in an exhaust brake of a vehicle has a butterfly (114) which in the fully open condition is not perpendicular to the direction of flow, but lies at a small oblique angle. The butterfly lies within the envelope of the spindle portion so as not to occlude flow area, and may be shaped to reduce flow friction and boundary layer turbulence.
摘要:
The inventive method and system includes a high speed computer algorithm (30) for rotating images stored in a memory of a computer (26), such as those captured by a CCD camera (22). The present invention is usable with on over-the-belt optical character recognition (OCR) reader (10) that captures a pixelized image of the surface of a parcel (14) as it moves along a conveyor (12). The preferred embodiment provides a method and system for obtaining a run-length encoded output image from a run-length encoded input image, wherein output image (17') is a rotated version of the input image (17). A predefined pixel mapping sequence for a rotation angle with a rational tangent is used to map image pixel data. Mapping image pixel data using a predefined pixel mapping sequence allows rotation without floating point computations, and allows the use of a reverse pixel mapping technique to map output runs from an input image in order to avoid the creation of holes or artifacts in the output image. The inventive method scales mapped output runs to preserve the aspect ratio of the rotated image. The inventive method selects the order in which to process the elements of the input run-length input table so as to directly create a run-length encoded output table.