摘要:
The invention relates to a high-precision autofocusing arrangement for a stereomicroscope wherein a bar-shaped marking is projected via a cylinder optic on an object. The imaged bar-shaped marking is at least in one dimension less or equal to the resolution of the viewing beam path. A region of the objective not used optically is selected for projection as the pass-through pupil.
摘要:
Antilock control system wherein pressure at the front and rear axles is controlled in cycles which each include a pressure reduction followed by a build-up of the brake pressure in pulses having holding phases therebetween. When a build-up of brake pressure at the front axle exceeds a predetermined time, the rate of build-up at the rear axle is reduced. The system prevents too much pressure build-up at the rear axle during the dynamic load transfer which occurs when braking a vehicle having a high center of gravity relative to its wheel base.
摘要:
A process and a device for smoothing tubular, extensible material with at least one closed end, especially for shaping stockings or tights, is described, with at least one apparatus to feed in and stretch the material on an elongated stretcher being provided, also with at least one apparatus to heat the material on the stretcher, such that the apparatus for feeding in and stretching the material has a gathering fixture to pre-gather the material and a stretching apparatus that has gripper elements to transfer the gathered-up material from the gathering fixture, that can be moved along the elongated stretcher in order to slip the gathered material onto the stretcher. This arrangement guarantees particularly gentle handling of the material, and uniform stretching on the stretcher.
摘要:
The invention is directed to a thrust vector control for aircraft with one or more jet engines whose thrust nozzles have an adjustable size exist cross-section, each of the jet engines having a ring rudder axially spaced behind the engine and movable about at least one pivot axis extending substantially perpendicular to the engine's longitudinal axis. A substantially planar rudder plate is secured diagonally in the inside cross-section of the ring rudder for each plane defined by each pivot axis and the longitudinal axis of the engine. The rudder plate or plates each consist of a material which is stable at high temperatures without supplementary cooling and which is mechanically loadable, and the connection between the rudder plate or plates and the ring rudder each include a layer of elastic and thermo-insulating material.
摘要:
A rotor for small motors, or generators, having circumferentially arranged segmental poles which extend over the entire axial length of the rotor can be fabricated by molding a pair of elements from particulate magnetic material of high coercivity with a binder in the shape of identical crown gears; the rotor being completed by arranging the elements on a shaft with the toothed portions facing each other in interfitting engagement. Other modifications are disclosed in which the pole pieces may be formed separately from, or integrally with, a radial pole carrier, and the pole carrier may be in the shape of a spool with the segmental pole pieces assembled thereon.
摘要:
Directing a laser beam at a surface to be treated, such as a metallic surface which is likely to reflect much of the energy, results in a high proportion of absorbed energy if the laser beam has an oblique incidence, particularly if the laser beam is polarized in a direction parallel to the plane of incidence (defined as the plane which contains the axis of the laser beam and the perpendicular to the surface at the center of the spot of incidence). In the case of iron and steel surfaces the absorbtion is markedly increased at angles of incidence greater than 45.degree. and just short of glancing incidence, with a maximum near 80.degree..
摘要:
Process for preparing 5-oxohexane-nitrile by reaction of acetone with acrylonitrile at elevated temperatures in the presence of an acid and a compound selected from the group consisting of primary amines, aliphatic amino alcohols, aliphatic amino carboxylic acids with primary amino groups or Schiff bases and in the presence of a minor quantity of water.
摘要:
A method for producing a series of base lenses, which cover a predetermined power range, wherein each base lens of the series has a base power different from the base powers of the other base lenses of the series, and has at least one diffractive base grating, the method comprising: specifying the base powers of each base lens of the series; and calculating the base grating of each base lens of the series so as to minimize the color fringe of the respective base lens with the specified base power in a predetermined region of the spectacle lens.
摘要:
A method for automatic sleeve filling of a winding shaft on roll cutting and winding machines is provided in which, in an exemplified embodiment, in a first step at least two empty winding sleeves are slid onto a free end of a winding shaft so that the winding sleeves are adjacent to one another, in a second step the last winding sleeve slid on by a freely positionable fork piece of a freely programmable draw-off plate along the winding shaft is slid over the winding shaft until the last winding sleeve has reached a predetermined position, in a third step the next-to-last winding sleeve slid on is grasped by tongs freely positionable along the winding shaft and is slid over the winding shaft to the point where in a fourth step the fork piece can dip into the gap produced by the tongs so that the next-to-last winding sleeve is positionable along the winding shaft by the fork piece.
摘要:
The compounds sorbicillacton A and sorbicillacton-A-derivatives of the general formula I are described, as well as methods for their production. Sorbicillacton A and sorbicillacton-A-derivatives, in cellular culture models, exhibit antitumour- and antiviral properties. Furthermore, sorbicillacton A has inflammation inhibiting properties. Finally, the synthesis of sorbicillacton A and its derivatives is described.