Abstract: A method of forming a road marker and the resulting road marker including a metallic base and a light transmitter, includes coating the metallic base with an oxidation inhibiting layer; and mounting the light transmitter on the base. The coating may be performed before the mounting. The coating may be a plating.

Abstract: A road marker base having locators or protrusions which are frangibly connected to the base. The pair of protrusions extend horizontally from the base in opposite directions and transverse to the direction of travel and include a bottom surface for engaging the top surface of the roadway adjacent the recess. The bottom surface defines the height of the reflector support surface relative to the road's top surface. A unidirectional base includes a reflector support surface adjacent one end of the base in the direction of travel capable of receiving and providing visibility of both faces of a standard bidirectional reflector.

Abstract: An improved, unitary signal assembly operable to replace removeable signal assemblies of sub-surface mounted roadway markers or alternatively capable of being mounted directly to pavement surfaces comprising a load carrying, rigid, compression resistant, metal center bar for transmitting vertical loads directly to a rigid base mounted in a sub-surface depression formed in a paved roadway or directly to the roadway surface when mounted independently of such a base; the center bar being integrated with a support base carrying at least one light emitting signal device formed separate or integrally with angularly disposed sides of the base; the center bar including a laterally extending canopy at its upper end operable for protectively overhanging the upper end of a signal device to insulate the same from impact loads.

Abstract: An annular closure ring for securing a cover in sealed relation over the open upper end of a cylindrical storage drum or similar container is disclosed in which a split ring is closed about the periphery of the drum and its cover by tightening a headed tie bolt between a pair of laterally spaced lugs fixed to the split ring on opposite sides of the split therein; one of the lugs having a threaded opening therethrough for engagement with the threaded body of a headed tie bolt and the other lug having an enlarged opening therethrough for free passage of the bolt body.

Abstract: A low profile, bi-directionally snow-plowable road marker having a cast metal base or body of generally square plan configuration formed on its underside with laterally spaced oppositely curved arcuate rib members flanked by transversely extending webs and protrusions located centrally of the body and acting with the rib members to self-center the cast body in a shallow arcuate depression of single radius formed in a roadway pavement; the webs and protrusions being configured to evenly distribute adhesive over the bottom, sides, ends and over portions of the upper side of the cast body to encapsulate and lock the same securely in the pavement depression.

Abstract: A closure ring assembly for securing a cover in sealed relation over the open top of a storage drum container in which a split ring is closed by tightening a headed tie bolt between a pair of laterally spaced lugs fixed to the ring on opposite of the split therein; the bolt freely passing through one of the lugs and threadingly engaging the other so that upon tightening the bolt the ring is contracted with the one non-threaded lug having outwardly extending teeth for engaging the bolt head to lock the same in tightened position.

Abstract: A security door assembly for enclosing the ends of filling and discharge hose storage tubes employed on over the road tank trucks and trailers is disclosed wherein pivotally interconnected cover door and support frame members are formed with interfitable male and female marginal lugs having coaxially aligned openings receptive of an axially moveable lock bolt whereby movement of the bolt in one direction serves to interlock the lugs and movement of the bolt in the opposite direction serves to release such lugs. A detent is provided for removably maintaining the bolt in locking and releasing positions and a stop member cooperates with the bolt to provide limited movement of the bolt in a lug releasing direction. A manually engageable member is provided on the bolt for actuating the same.