Abstract: A system and method are provided to facilitate disengagement of two mechanisms engaged with one another with a high stress therebetween, such as in rack locking arrangements used on offshore platforms. The first mechanism (e.g., a rack) is mobile in relation to the second mechanism (e.g., a pair of locking jaws) which serves as a locking mechanism for the first mechanism. The level of stress between the first and second mechanisms is measured, and the measurement is converted into an electrical control signal. This signal is used to control motor-driven force applying elements (e.g., pinions) in engagement with the first mechanism. The force applying elements are controlled in such a manner as to apply force to the first mechanism sufficient to offset the aforementioned stress between the first and second mechanisms, thereby permitting friction-free disengagement of the mechanisms.

Abstract: Carbon electrodes for the aluminum industry are shaped in a vibrating mold whose horizontal oscillations are restrained by tension members elongated in a horizontal direction and interposed between the vibrating mold and its stationary supporting structure to exert opposed forces on the mold in a common horizontal plane, thereby impeding horizontal vibration of the mold while permitting vibration in a vertical direction.

Abstract: Cooperating guide means are provided on a vibratory mold and a cover plate reciprocable into and out of the open top of the mold. The guide means are arranged to guide the cover plate during its vertical stroke just before it enters into the mold and to prevent any but vertical movements between the mold and the cover plate when the cover plate is within the mold. The operative length of the guide means is less than the length of the vertical stroke.