摘要:
Procede de recuperation selective a partir d'un minerai ou d'un concentre renfermant du plomb (4) dans une cellule electrolytique (1) comprenant au moins une anode (6) et une cathode (7). Ce procede comprend la mise en contact du minerai ou du concentrat (4) avec un electrolyte (3) contenant des ions chlorure et le maintien de l'electrolyte (3) a une temperature allant jusqu'au point d'ebullition de l'electrolyte (3) et a un pH jusqu'a 7 tout en maintenant un faible courant de densite d'anode (moins de 200 amp/m2). Par ce procede le soufre dans le minerai ou le concentre (4) est converti en sa forme elementaire, tandis que le plomb passe en solution alors que tout autre metal existant dans le minerai ou concentre (4) reste substantiellement non dissous. Le procede empeche la formation d'un film nuisible de soufre elementaire sur le minerai ou concentre resultant en des tensions pour la cellule et en une recuperation selective du plomb moindres.
摘要:
A ceramic fiber module (A) comprising a shell (10) and interior layers (11, 12, 13, 14) of ceramic fiber blankets is attached to the wall (15) of a furnace so that the ceramic fibers in the layers are in planes parallel to the wall. The layers are joined together and to the shell by an anchor pin (17) and/or refractory cement. The module (A) is anchored to the furnace wall by joining the anchor pin (17) to the base (18) which forms the sixth side of the shell (10). The base (18) is inserted into the retaining bracket (19) which is mounted on the furnace wall. The parallel layering of the ceramic fiber blankets permits the use of highly refractory blankets nearthe hot face and insulating blankets near the furnace wall.
摘要:
Discs (4 und 5) are mounted on a shaft (3) and cables (6) extend between the peripheries of adjacent discs (4 and 5) for use as ground engaging means. The shaft (3) and the discs (4 and 5) are rotated in the same direction as the wheels (2) of the cultivator, but a different peripheral speed. As a result of the difference in peripheral speeds of the wheels (2) and the discs (4 and 5), the cables (6) are caused to cultivate the ground. However, as the discs (4 and 5) are rotated in the same direction as the wheels (2), any weeds or other material dislodged by the movement of the cables (6) will be carried rearwardly by the cables (6) and deposited behind the cables (6), thus avoiding a build-up of unwanted material in front of the cultivator.
摘要:
split-ring (34) radially expandable under centrifugal force for damping vibrations of a rotary annular bellows (10) by pressing against the inner surfaces (38) of at least some of the convolutions (12) of the bellows (10) as the speed of the bellows (10) increases. Preferably, the split-ring (34) is positioned in a channel (46) for rotation with the bellows (10) and for radial expansion as a function of the rotary movement, while restrained from axial movement with respect to the bellows(10).
摘要:
A vibration detector incorporating two or more seismic elements. Shock and vibration responsive switches commonly employ a seismic element mounted on two parallel rods for indicating a break in an electrical circuit connected to the rods. These switches occasionally operate because foreign matter lodges between the element and one of the rods. These false alarms can be avoided by mounting two or more seismic elements (25) on rods (18) which are bent so as to provide concave surfaces (24) which support the elements (25) so that they remain in contact with each other, thus providing additional conductive paths between the rods (18). Although all of the elements (25) would simultaneously lift off at least one of the rods (18) when subjected to shock or vibration, it is unlikely that this condition would result from foreign matter. Where the elements (25) are ferro-magnetic, they can be mounted on straight rods (19) and urged together by a magnetic field.
摘要:
An arangement for the remote control of the setting of the nip between a fixed roller (57) and an adjustable roller (58) of apparatus which manipulates i.e. folds, slits, scores, perforates or deflects of paper, cardboard or the like, comprises a caliper (64) coupled to the adjustable roller and having a gap (66) the dimension of which varies in accordance with the dimension of the nip. By opening the caliper land inserting a specimen of a sheet in the gap the nip between the rollers is adjusted automatically to suit the specimen. The movable arm (72) of the caliper is formed by a block in which a spindle (73) of the movable roller is journalled and which is moved by a cam (77) operated by a handle acting through a Bowden cable (79).
摘要:
Apparatus for providing a measure of extravascular lung water of a subject using a single thermal indicator, including means (16) for providing an injection of the thermal indicator into the bloodstream of the subject at a position proximal to or in the right heart (10), means (26) for detecting a first time-temperature concentration curve of the bloodstream at a position in the pulmonary artery, means (104) responsive to the first time-temperature concentration curve detected in the pulmonary artery for calculating a characteristic time for the first time-temperature concentration curve, means (28) for detecting a second time-temperature concentration curve of the bloodstream at a position in a systemic artery, means (104) responsive to the second time-temperature concentration curve detected in the systemic artery for calculating a characteristic time for the second time-temperature concentration curve, means (104) for calculating the now of blood through the heart and lungs, and means (104) for calculating a measure of extravascular lung water in accordance with the difference between the products of the blood flow times the first characteristic time and the blood now times the second characteristic time.
摘要:
A control system for selectively communicating a plurality of sensors (17) with associated remote control devices (19, 20) includes a Master Synchronizer (10), a transmitter (11, 12) for each sensor and a receiver (13 14a) for each control device. A single signal line (14) is connected to all transmitters (11, 12) and receivers (13, 14a), and a single synchronization line (15) couples the Master Synchronizer (10) to all transmitters and receivers. The Master Synchronizer (10) generates a time frame signal which has a reset portion for resetting all transmitters and receivers synchronously at the start of each frame, and a periodic portion which determines the time slots for each frame and which decrements counters (31, 38) in all transmitters and receivers synchronously. A time division multiplex system is used to communicate each transmitter with one or more associated receivers during a predetermined time slot of a periodic time frame determined by the Master Synchronizer.