baber/WOPTO huggingface dataset:
Patent DK-246384-A (DK)
Inventor: BJOERK ANDERS KARL KONRAD
IPC: C07D403/06
Filed: 1984-05-17
Abstract: Intermediates, which are 1-piperazinecarboxylates of the general formula I <IMAGE> in which R2, R3, R4 and R5 are groups which are selected, independently, from hydrogen, lower alkyl having from 1 to 3 carbon atoms and phenyl, R6 is a group which is selected from hydrogen, F, Cl, Br, lower alkoxy having from 1 to 3 carbon atoms and -CF3 groups, R1 denotes either an unsubstituted or a substituted aryl group possessing good properties as a leaving group, expediently a phenyl- or para-nitrophenyl group, for preparing 1-piperazinecarboxamides of the general formula II <IMAGE> in which R7 and R8 are groups which are selected, independently, from hydrogen, straight-chain or branched alkyl chains having from 1 to 10 carbon atoms, cycloalkyl having from 3 to 8 carbon atoms, aralkyl having from 7 to 9 carbon atoms, or alkenyl having from 3 to 10 carbon atoms, or R7 and R8 denote, together with the nitrogen atom in the adjacent position, a 4- to 7-membered ring, such as <IMAGE> in which m = 0, 1, 2 or 3, n = 1 or 2, and Ra is a group which is selected from lower alkyl having from 1 to 3 carbon atoms, hydroxy-lower alkyl having from 2 to 4 carbon atoms and lower alkanoyl having from 1 to 3 carbon atoms. The carboxamides of the formula II are prepared by reacting 1-piperazinecarboxylates of the general formula I with an amine of the general formula III <IMAGE> in which R7 and R8 are defined as above, in a suitable solvent.
Patent DK-264987-A (DK)
Inventor: JENSEN CARL ERLING
IPC: F04D27/00
Filed: 1987-05-25
Abstract: In order to ensure an efficient stabilising against noticeable stalling, even when an axial blower has a large number of wings, in an axial blower of the type having on one hand a rotor with a hub and a number of rotor wings 2 protruding radially from the hub and on the other hand a housing surrounding the rotor and comprising an inlet portion 6 in its entirety situated to the upstream side of the rotor wings, an outlet portion 7 having substantially same diameter as the inlet portion and placed with its upstream end in a plane between the front and rear edges of the rotor wings and also between the inlet and outlet portions and in airtight connection with same, an annular chamber 8 situated outside of the flow passage cross sections of the inlet and outlet portions, said annular chamber overlapping the wing tips of the rotor and being divided into a number of cells distributed along the perimeter of the chamber by means of stationary baffle plates extending from the upstream end of the chamber to its downstream end and being connected with each other by means of a ring 11 having substantially same inner diameter as the inlet and outlet portions and such an axial position between the downstream end of the inlet portion and the upstream end of the outlet portion that it delimits an inlet and an outlet passage to and from the annular chamber 8 with substantially equal axial dimensions, the blower is characteristic in that the inner wall sides of the annular chamber 8 comprises wall portions 14 which extend obliquely outwards against the centre portion of the cross section of the annular chamber from the edges of the inlet and outlet passages of the chamber situated against the outlet portion 7 and the inlet portion 6 of the housing, respectively, and form a guiding surface by means of which a counterflow of air in the unstable field of operation led through the annular chamber from its inlet passage to its outlet passage, is directed inwards towards the axis of the blower to reduce the flow passage area for the axial in-flowing air ahead of the blower hub and affecting this with a velocity impulse increasing the velocity at which the counter-flowing air hits the front edges of the rotor wings 2. <IMAGE>
Patent DK-272980-A (DK)
Inventor: SAUER N S
IPC: G01M/
Filed: 1980-06-25
Abstract: In the method for testing the strength of a balcony 13, a securing plate 1 is used, mounted on a mobile crane 2 or a corresponding crane. The securing plate 1 consists of an engaging plate 3 which is displaced under the balcony 13 and a working platform 4 carrying loading equipment, such as weights 10 or a hydraulic or pneumatic working cylinder, the piston of which carries a pressure plate by means of which loading tests of the floor of the balcony can be made. The loading equipment may advantageously be displaced in the lengthwise and the crosswise directions of the balcony, such that the load can be applied at any desired point. The test may be carried out by loading the floor of the balcony with a load corresponding to that prescribed multiplied by a safety factor, or the deflection of the loaded part such as e.g. a girder iron may be measured simultaneously with the weight loading. By means of the method and apparatus, fall accidents during testing of existing balconies are prevented. <IMAGE>