Abstract: The invention relates to a fluorescent brightener pigment and the use of said pigment, which is derived from formaldehyde, for improving the whiteness of paper or textiles, or for incorporation in detergent compositions.

Abstract: The invention relates to a fluorescent brightener pigment and the use of said pigment, which is derived from formaldehyde, for improving the whiteness of paper or textiles, or for incorporation in detergent compositions.

Abstract: A transmission gear is composed of two gear elements provided with teeth on their circumference. The gear elements are displaceable coaxially in the circumferential direction and with their teeth offset with respect to one another. The elements are also connected with one another shapewise by at least one connecting member in such fashion that when a meshing gear engages the gear elements, the existing tooth flank play is reduced or eliminated. In this way the connecting member connects the gear elements so that they are nondisplaceable with respect to one another in the circumferential direction and causes the displacement of the gear elements with respect to one another by virtue of its thermal expansion.

Abstract: An automatic gate arrangement has a hollow and tubular lower post part defining an upright post axis and fixed to one side of the path, an upper end wall transverse to the post axis, and lower fasteners releasably securing the upper end wall to the lower post part. A support fixed to the upper end wall extends upward along the post axis therefrom and pivotally supports a gate shaft at the post axis. A reversible drive motor fixed on and underneath the upper end wall in the lower post part has a rotary output extending through the upper end wall. A transmission between the rotary output and the shaft converts rotation of the output into oscillation about the post axis of the shaft. A C-shaped gate projects laterally from the post axis and is secured to the shaft by connecting means for joint rotation about the post axis unless the gate and shaft are relatively rotated about the post axis with a force exceeding a predetermined maximum force.