Abstract: A hand-held pulse laser distance measuring device and a pulse reflection mixing method both having an algorithm which controls a microcontroller and which serves to calculate the distance to a measurement object by at least two different time differences ?11, ?12 between a measurement pulse and a reference pulse with a pulse width ?t, which time differences ?11, ?12 are measured with a pulse repetition frequency f1, f2, respectively, wherein a selection module is provided which selects at least the first pulse repetition frequency f1 from at least a first frequency set {f}1 with at least one other pulse repetition frequency f1i in such a way that the condition |?11·f1i|>A >2·|?t11·f1i| is satisfied with a pre-selected lower limit A, a relative time difference |?1i·f1i| and a relative pulse width |?t?·f1i|.

Abstract: A rotary laser (1) has a laser beam unit (7) which is suitable for emitting at least one laser beam (2) rotating in a beam plane (E) and which is controlled by computer (9) so as to be switchable from a rotating operating mode (I) in which the at least one laser beam (2) rotates in the beam plane (E), to a scanning operating mode (II) in which the at least one laser beam (2) scans in the beam plane (E) within an angular sector (?), and a plurality of detectors (10) distributed circumferentially around an axis of rotation (A) and which are sensitive to an amplitude at least within the beam plane (E) and are connected to the computer (9).

Abstract: Improved Ziegler-Natta catalysts and methods of making the improved catalyst are described. The Ziegler-Natta catalyst is formed using a spherical MgCl2-xROH support, where R is a linear, cyclic or branched hydrocarbon unit with 1-10 carbon atoms and where ROH is an alcohol or a mixture of at least two different alcohols and where x has a range of about 1.5 to 6.0, preferably about 2.5 to 4, more preferably about 2.9 to 3.4, and even more preferably 2.95 to 3.35. The Ziegler-Natta catalyst includes a Group 4-8 transition metal and an internal donor. The catalyst has improved activity in olefin polymerization reactions as well as good stereoregularity and hydrogen sensitivity.

Abstract: An electromagnetic frictionally engaged clutch provided with a rotor part including a friction lining. An electrical coil and a first permanent magnet are arranged on the rotor part. The clutch also includes an armature disk which is connected to a second shaft and can be displaced in a rotationally fixed manner, but axially from a coupled end position to an uncoupled end position. The coil of the clutch is enabled to be current-free both in the coupled state and in the uncoupled state. To this end, a second permanent magnet is provided for exerting an axial force opposing the magnetic force of the first permanent magnet on the armature disk.

Abstract: Latency information is used for coding of additional information in a record medium. This additional information which gets embossed in the record medium might be used for verification purposes in that only storage media with the correct latency information are judged to be authentic or might be decoded in a proper way. This technique is applicable to record media, recordable record media, an emulator for recordable or non-recordable record media, a method for producing recordable or non-recordable record media, a method for verifying recordable or non-recordable record media, a record medium writing device for producing recordable or non-recordable record media, and a record medium accessing device for verifying recordable or non-recordable record media.

Abstract: A measuring device (10) for determining and/or transmitting one-dimensional measurements, taken with reference to at least one end side (16) of the measuring device (10), includes a holding arrangement (17) provided on the at least one end side (16) for temporarily fixing marking element.

Abstract: A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.

Abstract: An electro-optic laser distance meter (1, 1?) has a hand-held housing (2), an electric radiation source (3) for generating a bundled light beam (4), and receiving optics (5) with a photoreceiver (7) for receiving parts of the light beam (4) that is backscattered in a reception beam bundle (9) from a measurement object (8), with the photoreceiver (7) being arranged along the reception axis (E) in the focal point (6), extending in a plane transverse to the reception axis (E), and being partially shadowed inside the reception beam bundle (9) by a polarization filter (10, 10?, 10?, 10??).

Abstract: A hand-held pulse laser distance measuring device (1) with an algorithm (3) which controls a microcontroller (2) and which serves to calculate the distance (X) to a measurement object (4) by a time difference (?) between a measurement pulse (6) and a reference pulse (7) and with a superimposition module (5) which calculates the time difference (?) of a plurality of repeated pulse trains which are periodically superimposed with a trigger frequency fTRIGGER, wherein the trigger frequency fTRIGGER lies in the frequency range of 0.7 · 2 2 · m - 1 · f INT < f TRIGGER < 1.3 · 2 2 · m - 1 · f INT , where ? ? m = 1 , 2 , 3 , … at an interference frequency fINT=100 Hz . . . 120 Hz; and a measuring method for the pulse laser distance measuring device.

Abstract: A rotary laser (1) has a laser beam unit (7) which is suitable for emitting at least one laser beam (2) rotating in a beam plane (E) and which is controlled by computer (9) so as to be switchable from a rotating operating mode (I) in which the at least one laser beam (2) rotates in the beam plane (E), to a scanning operating mode (II) in which the at least one laser beam (2) scans in the beam plane (E) within an angular sector (?), and a plurality of detectors (10) distributed circumferentially around an axis of rotation (A) and which are sensitive to an amplitude at least within the beam plane (E) and are connected to the computer (9).

Abstract: A detector (1) for detecting embedded elongate objects (5) has an evaluating unit (6), a computing device (7), an output device (8), and a handheld measuring head (9) which can be moved over a surface (F) and which has a path a detector (10) and a transmitting-receiving unit (11a) with an antenna (12a). At least two antennae (12a, 12b) are spaced apart from one another along the surface (F), and the distance (A) therebetween, measured over the surface (F), ranges between 5 cm and 50 cm.

Abstract: A hand-held laser distance measuring device (1) with pulse reflection mixing includes a control device (2) for calculating the distance (D) to a measurement object (3) over at least one determinable periodic, with a pulse repetition frequency (f), time difference (?) between a measurement pulse (4) reflected at the measurement object (3) and a reference pulse (6) of an optically emitted transmitting pulse (7) traveling over a reference distance (5) within the device, a local oscillator (8) for generating the transmitting pulse (7) at the pulse repetition frequency (f), at least one delay circuit (9a, 9b) which can be controlled by the control device (2), is arranged between the local oscillator (8) and a light detector (10) and/or a light transmitter (12), and generates a delay between the scanning pulses (11) and the transmitting pulses (7) in order to scan the measurement pulse (4) and the reference pulse (6).

Abstract: A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an intermediate composition, and then combining the intermediate composition with one or more metallocene compound. The catalyst system is advantageously used for olefin polymerization.

Abstract: An electro-optical hand-held distance measuring instrument (1) with a housing (2) which can be held in the hand and with an electro-optical distance measurement module (3) with an electric beam source (5) for generating an optical measurement beam (S), a beam receiver (8) for receiving portions of the measurement beam (S) that are backscattered by an object to be measured (MO), and an output device (7) for the determined distance (X). A mechanical distance measuring device (9, 11) is connected to the housing (2).

Abstract: A process for the preparation of a catalyst system includes the steps of combining a support material with a first composition which includes at least one aluminoxane in a first solvent to provide an aluminoxane loaded support; and, contacting the aluminoxane loaded support with a second composition which includes at least one metallocene compound, a second solvent, and a cocatalyst, wherein the cocatalyst includes a second portion of the at least one aluminoxane alone or in combination with an ionic compound and/or a Lewis acid.

Abstract: A hand-held pulse laser distance measuring device and a pulse reflection mixing method both having an algorithm which controls a microcontroller and which serves to calculate the distance to a measurement object by at least two different time differences ?11, ?12 between a measurement pulse and a reference pulse with a pulse width ?t, which time differences ?11, ?12 are measured with a pulse repetition frequency f1, f2, respectively, wherein a selection module is provided which selects at least the first pulse repetition frequency f1 from at least a first frequency set {f}1 with at least one other pulse repetition frequency f1i in such a way that the condition |?11·f1i|>A >2·|?t11·f1i| is satisfied with a pre-selected lower limit A, a relative time difference |?1i·f1i| and a relative pulse width |?t?·f1i|.

Abstract: A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems comprising specifically selected metallocenes, in particular ones which bear different substituents in position 2 and position 4 on an indenyl ligand. Novel polypropylene copolymers can be obtained by this process.

Abstract: A beam catcher (1) for a light beam (2) pulsating in amplitude at a modulation frequency (f) with a photodetector (4) with a plurality of photosensors (6) which are offset in a spatially defined manner relative to a reference point (5), an evaluating circuit (7), and an output device (8). A phase shifter (10) that is sensitive to the modulation frequency (f) is arranged between at least two photosensors (6).

Abstract: A process for the preparation of a catalyst system includes the steps of combining a Lewis base, an organic compound having at least one functional group containing active hydrogen, and an organometallic component with a particulate support material to provide an intermediate composition, and then combining the intermediate composition with one or more metallocene compound. The catalyst system is advantageously used for olefin polymerization.

Abstract: A catalyst system includes a metallocene compound having the formula R9 L1 L2 M1 R1 R2 wherein R9 is a bridge between ligands L1 and L2 and M1 is a metal of Group IVB of the Periodic Table such as titanium, zirconium and hafnium and R1 and R2 can be hydrogen or aliphatic or aromatic groups. Bridge R9 can include silicon, germanium or tin. The metallocene compound of the invention as synthesized has a racemic to meso isomer ratio of greater than 5 to 1, thereby precluding the need for subsequent separation of the meso isomer.