摘要:
A method for manufacturing powdered quantum dots comprising the steps of: a) reacting quantum dots comprising a core, a cap and a first ligand associated with the outer surfaces thereof with a second ligand, the second ligand displacing the first ligand and attaching to the outer surfaces of the quantum dots, b) isolating the quantum dots having the attached second ligand from the reaction mixture, c) reacting the isolated quantum dots having the attached second ligand with a small organic molecule whereby the small organic molecule attaches to the second ligand, d) reacting the quantum dots having the attached small organic molecule with a cross-linking agent to cross-link the small organic molecule attached to the second ligand with an adjacent second ligand attached to the surfaces of the quantum dots, e) isolating the quantum dots formed in step (d); and f) drying the isolated quantum dots to form powdered quantum dots. The invention includes the quantum dots.
摘要:
The present invention relates to a rotary exposure machine (14), comprising: a guide bed (26); means (15, 16) for rotably supporting a round screen (1) on the guide bed (26); driving means (19, 20) for rotably driving the round screen (1); an optical slide (21) moved along guides (22) while the round screen (1) is turning, the guides (22) are mounted on the guide bed (26); and a laser (27) for exposing a photosensitive coating layer (L) provided on the outer surface of the round screen (1), wherein the laser (27) is carried along with the optical slide (21).
摘要:
A non-exhaustable permanent brake for a vehicle motor, which includes a fluid operable braking unit arranged in the housing of the vehicle motor and comprising a pump wheel which is drivingly connected to the crankshaft of the motor and is interposed in a liquid lubricant circulating circuit. This pump wheel has associated therewith a follower which normally is freely and under no load rotated by the liquid lubricant circulated by the pump wheel but can be arrested by a friction brake to brake the pump wheel and thereby the motor.
摘要:
A method for manufacturing powdered quantum dots comprising the steps of: a) reacting quantum dots comprising a core, a cap and a first ligand associated with the outer surfaces thereof with a second ligand, the second ligand displacing the first ligand and attaching to the outer surfaces of the quantum dots, b) isolating the quantum dots having the attached second ligand from the reaction mixture, c) reacting the isolated quantum dots having the attached second ligand with a small organic molecule whereby the small organic molecule attaches to the second ligand, d) reacting the quantum dots having the attached small organic molecule with a cross-linking agent to cross-link the small organic molecule attached to the second ligand with an adjacent second ligand attached to the surfaces of the quantum dots, e) isolating the quantum dots formed in step (d); and f) drying the isolated quantum dots to form powdered quantum dots. The invention includes the quantum dots.
摘要:
A ceiling socket for ceiling lights includes a socket 25 and of a support piece 5, which is accommodated therein and has electrical clamping contacts. The support piece 5 is assigned a pivotably articulated suspension hook 6 which, in its use position, is folded out, pointing away from the ceiling, and, in its non-use position, is arranged with its suspension portion 14 parallel to the surface of the support piece 5. The suspension hook 6 has an anchoring piece 7 which is displaceably mounted in a guide 26 assigned to a fastening piece 27. In its non-use position, the anchoring piece 7 of the suspension hook 6 is arranged eccentrically in relation to the suspension position, which is arranged substantially centrically relative to the ceiling socket 1.
摘要:
A metal casting control device is provided for use in conjunction with a semi-continuous metal casting system. The control device is an integral module containing a metal surface elevation sensing device, a valve actuator for positioning a metal distribution control valve, and electronic circuits associated with these mechanical components. The control device module is adapted to be connected to an overhead metal distribution launder by a single quick-coupling for convenient and simple removal and replacement. Calibration of the control device is performed after installation by mounting a calibration target on the metal casting system and vertically adjusting the metal surface elevation sensing device until an integral calibration indicator positioned on the control device indicates that the proper vertical position has been attained. The metal surface elevation sensing device is formed by a manually-adjustable sensor carriage and a sensor support which is mounted for automatic vertical movement relative to the sensor carriage. An inductive proximity sensor is supported over a metal casting station by the sensor support. The vertical position of the sensor support is controlled to maintain the sensor within a fixed vertical distance from the surface of molten metal within the metal casting station.
摘要:
In a method for the insertion of balancing weights in pockets of an insulating end disc of an electrical machine rotor, only balancing weights of the same weight value are utilized. The balancing weights are distributed over the weight-receiving pockets on both sides of a plane extending through a determined balancing position and the axis of rotation of the rotor. The inserted balancing weights are secured in their respective pockets by means of respective detent closures.
摘要:
A method of manufacturing a brake pad comprising casting a back plate in a mould. The plate is formed with at least one integral projection which overhangs an adjacent surface of the plate. The mould is formed from frangible material and has a recess in the shape of the projection. The mould is formed from particulate material compressed around a projection made of resilient material which deforms to the shape of the projection. The resilient material is withdrawn to form the recess. Metal is cast in the mould including the recess. After solidification of the metal, the mould is broken away from the projection. The method also comprises pressing a mixture containing friction material and curable material against the plate including pressing the mixture around the projection so that it extends beneath the overhang and curing the curable material to form a block of friction material adhered to the plate.
摘要:
At the method of producing formed articles of a fiber reinforced, hydraulically setting material the organic fibers are mineralized by aluminum sulfate and silica, the mixture processed with excess water to multilayered products, the laminates arrived therewith are then set in two steps and finally the formed articles produced treated by CO.sub.2 for a pre-carbonization.