Abstract: Oscillating table in which the oscillation drive, comprising a hydraulic actuator, transmits the oscillating motion to the mould via a spring subject to bending stress, for example a fitted rod. The body of the hydraulic actuator is also anchored to the floor by means of a fitted spring subjected to bending stress. Thus thanks to the absence of any mechanical bearings in the drive mechanism, all disadvantageous movements caused as a result of bearing play, which increases at high oscillation frequencies, are eliminated. Moreover, the use of mould guide elements having a much simpler design and consisting of straightforward bars, also ensures greater guidance precision and enables a reduction in the oscillation marks on the cast product, a reduction that is even more noticeable when working at higher oscillation frequencies. Advantageously, the presence of an anti-roll device, consisting of two or more pairs of bars, for example two pairs, ensures good torsional rigidity of the table.

Abstract: The present invention consists of a device for fitting security gratings in a simple way, without any complicated walling operations and with no need of skilled workers. It permits to place a grating by means of two guides parallel each other, which represent the base and the top of the grating. Since they are provided with telescopic parts at their ends, they suit any span to be protected, ensuring a perfect fitting. This device and its fitting process can get, by the realization of an industrial product, the same effects obtained by the realization of a handmade product, but a very low costs and with considerable saving of time in fitting.