Abstract: A handrail assembly and a handrail system incorporating the assembly. The handrail assembly includes a handrail which is a formed structure with an inner channel, and a mount structure accommodatable within the channel and having opposing substantially parallel members each having handrail engagement support members pliantly couplable with engagement support member acceptors within the channel. The handrail system incorporates the assembly and a base support structure extending from the mount structure. An expansive fill material can be introduced into the channel to substantially encapsulate the mount structure within the channel and provide protection from the environment. The handrail assembly provides a handrail structure and a mounting structure whereby the mounting structure is pliantly expandable and contractible to accommodate expansion non-compatibility of the mounting structure and the handrail structure due to temperature change.

Abstract: A self-contained door lock with an indicating device visible on the inside surface of a door that can be provided as an adaptor for existing door locks or manufactured as part of the original door lock. The indicating device automatically gives a visible indication at the lock location as to whether the door lock is locked or unlocked. The indicating device automatically works in coordination with the door lock mechanism.

Abstract: Foundry cores and molds for casting metals are prepared by forming a binder comprising a polyol, an isocyanato urethane polymer and a urethane catalyst. The foundry cores and molds of this invention are formed by processes known in the industry as the "cold box" process and the no-bake process. The binder is especially useful for casting non-ferrous metals, for example, the casting of aluminum, magnesium and other lightweight metals. The cores and molds produced for casting aluminum and other lightweight metals exhibit excellent shakeout while retaining other desirable core and mold properties.