摘要:
A cleaning unit for cleaning travel equipment allows the travel equipment to be shifted from an operating mode to a cleaning mode. The cleaning equipment is an escalator or a moving walkway which has tread units connected with an endless conveyor. The cleaning unit can be mounted as a substitute for a tread unit of the travel equipment during a cleaning sequence and includes cleaning elements. The travel equipment can be shifted from an operating mode to a cleaning mode in which the cleaning equipment is substituted for one or more tread units and the travel equipment operated whereby a cleaning sequence is performed. After cleaning is performed, the equipment is stopped, the cleaning equipment removed, and the removed treads reinstalled.
摘要:
A clip for joining bearing elements, such as found in escalator constructions is disclosed, and may be employed, for example, to join a track rail, on which rollers of an escalator roll to a carrier frame. The clip has a base part and a bracket part of spring steel. At the upper end of each side, the base part has a shoulder to engage one of the elements to be joined. The bracket part has a lug which engages the other element to be joined and, through a further lug, presses the shoulders of the base part against the first element to retain the two elements in the desired contacting position.
摘要:
Disclosed is a method for inducing desorption of hydrogen for a metal hydride by applying thereto sufficient energy to induce hydrogen desorption by endothermic reaction. The energy that is so-applied is non-thermal and selected from the group consisting of mechanical energy, ultrasonic energy, microwave energy, electric energy, chemical energy and radiation energy.
摘要:
A powder of an alloy of Ni and Mg, La, Be or Li, consisting of crystallites having a grain size lower than 100 nm and a crystalline structure allowing hydrogen absorption. This powder which is preferably obtained by mechanical grinding, may consist of cristallites of Mg.sub.2 Ni, LaNi.sub.5 or of Ni-based alloys of Be or Li having a grain size lower than 100 nm. The powder may also consist of cristallites of formula Mg.sub.2-x Ni.sub.1+x, x ranging from -0.3 to +0.3, which have a grain size lower than 100 nm, and preferably lower than 30 nm. This crystalline powder is particularly useful for storing and transporting hydrogen. Indeed, it has been discovered that such Ni-based nanocrystalline powder requires no or only one single activation treatment at low temperature to absorb hydrogen. It has also been discovered that the kinetic of absorption and diffusion of hydrogen within the powder is much faster. This can be explained by the presence of a large number of grain boundaries.
摘要:
A visible and/or MRI visualizable permanent image is formed in a gel in a container which maintains the gel a dimensionally stable shape, which gel contains uniformly dispersed therein in storage stable form at least one radiant energy, e.g., ionizing radiation, or mechanical, e.g., ultrasonic or sonic shock wave, polymerizable monomer in a concentration effective to form a polymer in the gel which alters the NMR relaxation time of the solvent in any area thereof in which the polymer is formed, e.g., a mixture of (a) a linearly homopolymerizable monomer and (b) a comonomer which is cross-linkably copolymerizable with the monomer, the polymerization of the monomer initiated by the radiant or mechanical energy being restricted to any area of the gel which receives that energy, which image is representative of the dose distribution of the energy to which the gel is exposed, by exposing the gel to a non-uniform dose of the energy until a polymer which produces a permanent image representative of the dose of the energy received by the gel is formed therein. The image can be used for dosimetric purposes; to provide reference standards for quality control of magnetic resonance imaging techniques and equipment; and as a three- or two-dimensional array detector in industrial radiography (nondestructive testing techniques).