Abstract: The invention relates to liquid-crystalline phenol esters of the formula I in which R, A1, Z1, m, L and Y are as defined in Claim 1, to liquid-crystalline media comprising at least one phenol ester of the formula I, and to electro-optical displays containing such a liquid-crystalline medium.

Abstract: Tetrahydropyran derivatives having at least one ester group (—CO—O—) and at least one group —CN, —NCS, —F, —Cl, —OCHF2, —OCF3, —CF3, —OCHFCF3, —OCF2CHFCF3, SF5, or —OCF2CF3; a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Abstract: The invention relates to pyran derivatives of formula I and processes and intermediates for their preparation and derivatisation, and the use thereof in liquid-crystalline media.

Abstract: The invention relates to pyran derivatives of the formula I and to a process and intermediates for their preparation and derivatisation, and to the use thereof in liquid-crystalline media.

Abstract: A tetrahydropyran derivative comprising at least three cyclic rings and one aromatic endgroup of the formula A a process for preparing said tetrahydropyran derivatives, and the use of said tetrahydropyran derivatives as a component in a liquid crystal composition.

Abstract: Aldehydes containing a difluorooxymethylene bridge, of the general formula I

Abstract: The invention relates to a cutting subassembly for machines by means of which panel-like workpieces which are moved continuously in a rectilinear manner are machined in order for front and/or rear edge overhangs to be cut off, having a saw unit which comprises a motor-driven saw blade and is mounted such that it can be displaced between a position above, and a position beneath, the workpiece, and having a contact element which is associated with the saw blade and has at least one contact surface, it being possible for the contact surface to be engaged against the front or rear transverse side of the workpiece and for the cutting plane of the saw blade to be oriented in alignment with the contact surface.

Abstract: A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, including one or more compounds of the general formula I: ##STR1## in which, R is H, an alkyl or alkenyl radical having 1 or 2 to 15 carbon atoms respectively which is unsubstituted, monosubstituted by CN or .sub.CF. or at least monosubstituted by halogen, where one or more CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO--, or --O--CO--O-- in such a way that O atoms are not linked directly to one another,m is 0 or 1,n is 0, 1 or 2, andm+n is 1, 2 or 3.

Abstract: In order to manage with a lower suction capacity of the sawdust fan in the case of a vertical board saw with a sawing unit movable horizontally and vertically, a support grid receiving a workpiece, being arranged essentially vertically and displaceable in the vertical direction, this grid comprising a plurality of support bars arranged horizontally and in parallel spaced relation to one another as well as suction channels arranged at right angles hereto and opening towards the workpiece, and a device for collecting the sawdust resulting on the side of the support grid during horizontal cutting, it is suggested that the support bars be designed as essentially closed channels each with a slot-shaped opening extending essentially along the entire length of the support bar, an edge of the saw blade of the sawing unit being able to enter this opening essentially without making contact during the horizontal cutting, and that the support bar channels be connected to a sawdust collecting means, wherein the support ba

Abstract: The invention relates to difluorovinyl ethers of the general formula I ##STR1## in which R, A, X and m are as defined in claim 1, and to the use of these compounds as components of liquid-crystalline media, and to liquid-crystal and electro-optical display elements which contain the novel liquid-crystalline media.

Abstract: The invention relates to methylenecyclobutane benzene derivatives of the formula I ##STR1## in which R.sup.1, A.sup.1, Z.sup.1, L.sup.1, L.sup.2, m, V, W, Y and n have the meaning given in claim 1, and to their use as components of liquid-crystalline media for electrooptical displays.

Abstract: The invention relates to methylenecyclobutane derivatives of the formula I ##STR1## in which R.sup.1, A.sup.1, A.sup.2, Z.sup.1, Z.sup.2, L.sup.1, L.sup.2, X, Y and m are as defined in claim 1, and to the use thereof as a component of liquid-crystalline media for electrooptical displays.

Abstract: A device for scoring workpieces, in particular, laminated panels, which are to be split up subsequently by a circular saw along the scored track, comprises a scoring head arranged in the direction of operation forwardly of the circular saw, and two scoring knives held stationarily on the scoring head and penetrating the workpiece surface, with their mutual spacing corresponding to the cutting width of the saw blade.

Abstract: In guide rollers (2) for band saws, especially for sawing meat and bones, the contact surface (4) is very quickly fouled or soiled by greasy fat, bone meal, etc., which has a disadvantageous effect on the power transmission and the guidance of the band saw blade (3). The contact surface (4) of the guide roller rim which guides the band saw blade, is provided with open passages (7) reaching to the side surfaces (5) of the guide roller rim. Fat and other contaminating material is pressed by the band saw blade into the passages and is flung away from the rotating guide roller (2), whereby a reliable operation of the band saw is assured.

Abstract: A device for scoring workpieces, in particular, laminated panels, which are to be split up subsequently by a circular saw along the scored track, comprises a scoring head arranged in the direction of operation forwardly of the circular saw, and two scoring knives held stationarily on the scoring head and penetrating the workpiece surface, with their mutual spacing corresponding to the cutting width of the saw blade.