摘要:
A manually operable tool, such as a hammer drill, for drilling and/or removing material in at least one of brittle material and low ductile material, has a continuously rotatable chuck (8) and a motor driven striking mechanism (1) for transmitting impulse-like blows to a tool bit (9) held in the chuck (8). The tool includes members (5) for transmitting impulse-like blows composed of superimposed axially-directed blows and torsional blows to the tool bit (9) in the chuck for forming drilling blows. Further, an adaptor can be provided for attachment to the hammer drill containing the members (5) for affording the superimposed blows.
摘要:
The invention relates to the use of oxime sulfonates of formula 1 ##STR1## wherein R is naphthyl, ##STR2## Ar is an unsubstituted aryl group or an aryl group which carries one or more than one substituent selected from the group consisting of nitro, chloro, bromo, hydroxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 perfluoroalkyl, C.sub.1 -C.sub.4 alkoxy and acid degradable substituent; R.sub.0 is either a R.sub.1 -X group or R.sub.2 ; X is an oxygen or a sulfur atom; R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted phenyl or phenyl which is substituted by a member selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy, and R.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl or an acid-degradable substituent, as radiation-sensitive photoacid generator in a chemically amplified photoresist which is developable in alkaline medium and is sensitive to radiation of a wavelength in the range from 340-390 nm, and to corresponding positive-working and negative-working photoresists for the cited wavelength range.
摘要:
The invention relates to the use of oxime sulfonates of formula 1 ##STR1## wherein R is naphthyl, ##STR2## Ar is an unsubstituted aryl group or an aryl group which carries one or more than one substituent selected from the group consisting of nitro, chloro, bromo, hydroxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 perfluoroalkyl, C.sub.1 -C.sub.4 alkoxy and acid degradable substituents;R.sub.0 is either a R.sub.1 --X group or R.sub.2 ;X is an oxygen or a sulfur atom;R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted phenyl or phenyl which is substituted by a member selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy, andR.sub.2 is hydrogen, C.sub.1 -C.sub.4 alkyl or an acid-degradable substituent, as radiation-sensitive photoacid generator in a chemically amplified photoresist which is developable in alkaline medium and is sensitive to radiation of a wavelength in the range from 340-390 nm, and to corresponding positive-working and negative-working photoresists for the cited wavelength range.
摘要:
The clamping shank (1) of a chisel-cutting and/or percussion boring tool bits has stop faces effective in the axial direction and in the circumferential direction. Entrainment faces (2), open towards a free end of the clamping shank (1) are located upstream of these stop faces in the direction of the cutting area of the tool bits. The radial dimension (r) of the essentially radially extending entrainment faces (2) is greater than their axial dimension (a). In cooperation with an appropriately designed tool bit receptacle, the entrainment faces (2) can carry such a large share of the torque, that the stop faces are effectively relieved or unloaded.
摘要:
Described is a process in which the liquid ash is removed from a combustion gas which is produced by a combustion of coal with air under a pressure between 2 to 30 bars, wherein the combustion gas at a temperature between 1200.degree. and 1700.degree. C. is passed through at least one porous gas-permeable filter element which is disposed in the combustion chamber. The combustion is effected with a C:O.sub.2 mole ratio of 1:0.6 to 1:0.99 and the filter element consists of carbon; carbides of boron, silicon, titanium, zirconium or hafnium; nitrides of boron, silicon, titanium, zirconium or hafnium; borides of titanium, zirconium or hafnium; and/or oxides of aluminum, silicon, magnesium or zirconium.
摘要:
A hand-held power tool includes a motor-driven percussion mechanism. The percussion mechanism includes a guide tube (21) and a reciprocating driving member (22) displaceable in the guide tube (21) for driving, via a gas spring, an impact member (23) likewise displaceable in the guide tube (21). The percussion mechanism further includes a motor-driven eccentric wheel (17) rotatable about an axis (D) which is spaced from the percussion mechanism axis (S) in a direction perpendicular to the percussion mechanism axis (S) by a distance (X). A connection rod (29) is eccentrically supported on the eccentric wheel (17) and connected to the driving member (22) for converting a rotational movement of the eccentric wheel (17) into a reciprocating movement of the driving member (22).
摘要:
A tool for drilling and/or chiseling has a striking mechanism (6) within a guide tube (9) for reciprocating a first piston (7) and, via an air cushion, for reciprocating a second piston (19) within the guide tube. The second piston drives a driving anvil (17) in the driving direction. Between the first and second pistons (7, 19) the guide tube (9) has a series of radially extending first air passages (10) arranged in a first plane (E1) extending perpendicularly of the driving direction. A control body can be shifted over the guide tube (9) and is connected to the driving anvil (17). The guide tube (9) has a second series of radially extending second air passages (11) therethrough arranged in a second plane (E2) spaced from the first plane (E1) at a distance (A) opposite to the driving direction.
摘要:
A dimmer logic for fluorescent lamps is described which operates after the principal of a two-point circuit with two stable operating points, where in dimmer operation periodic changes between the two operating points takes place. By periodically switching on and off the fluorescent lamp the average brightness of the fluorescent lamp is reduced. The dimmer logic can be extended by sensor inputs for current and voltage to control the voltage, current and power. By appropriate design of the dimmer logic a control and protection circuit for overcurrent, overvoltage and overpower can be realized.
摘要:
Positive photoresist compositions comprising, in an organic solvent, at leasta) one alkali-soluble resin,b) one photosensitive quinone diazide,c) one aromatic hydroxy compound of formula I ##STR1## wherein each R is --H, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy,--OCH.sub.2 C.sub.6 H.sub.5, --OC.sub.6 H.sub.5 or --COOC.sub.1 -C.sub.4 alkyl, and R.sub.1 and R.sub.2 are each independently of the other H, C.sub.1 -C.sub.4 alkyl,--C.sub.6 H.sub.5 or a cycloaliphatic 5- or 6-membered ring, a is an integer from 0 to 4, and m and n are each independently of the other 0, 1 or 2, which compound enhances the photosensitivity and/or the rate of development, and optionallyd) additional customary modifiers,are eminently suitable for making relief structures.
摘要翻译:正性光致抗蚀剂组合物,其在有机溶剂中包含至少一种碱溶性树脂,b)一种光敏醌二叠氮化物,c)一种式I的芳族羟基化合物,其中每个R是-H,C1 C 1-4烷基,C 1 -C 4烷氧基,-OCH 2 C 6 H 5,-OC 6 H 5或-COOC 1 -C 4烷基,R 1和R 2各自独立地为H,C 1 -C 4烷基,-C 6 H 5或脂环族五元或六元环,a为 0至4的整数,m和n各自独立地为0,1或2,该化合物增强了光敏性和/或显影速率,并且任选地d)另外的常规改性剂特别适用于制备浮雕结构 。
摘要:
A tool bit has an axially extending shank section (1) to be inserted into a chuck in a manually-operated tool. The tool bit has an axially extending working section extending from the shank section. In the end region of the shank section remote from the working section there are first faces (2) acting in the axial direction and second faces (3) acting in the circumferential direction. In addition, the shank section (1) has entrainment faces (4a) spaced axially from the first and second faces toward the working section. The entrainment faces (4a) are located radially outwardly from the first and second faces (2, 3). The entrainment faces (4a) are part of grooves formed by a profiled section of the shank section and the grooves are open in the axial direction toward the first and second faces. The entrainment faces (4a) are radially spaced outwardly from the outer surface of the part of the shank section containing the first and second faces, so that they are able to transmit larger torques.