Abstract: An adjustable core pin for molding vials for use in levels and those vials molded using the adjustable core pin are disclose. The core pin includes an elongate rod with a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the distal end of the rod projects from a rod retainer distal opening, the rod being adjustable in relation to the rod retainer so that the crest can be adjustably placed at a preferred position in a molding cavity for vial molding.

Abstract: An adjustable core pin for molding vials for use in levels and those vials molded using the adjustable core pin are disclose. The core pin includes an elongate rod with a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the distal end of the rod projects from a rod retainer distal opening, the rod being adjustable in relation to the rod retainer so that the crest can be adjustably placed at a preferred position in a molding cavity for vial molding.

Abstract: An adjustable core pin, and method of use thereof, for molding vials for use in levels, including an elongate rod with a barrel-shaped distal section having a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the distal end of the rod projects from a rod retainer distal opening, the rod being adjustable in relation to the rod retainer so that the crest can be adjustably placed at a preferred position in a molding cavity for vial molding.

Abstract: An adjustable core pin, and method of use thereof, for molding vials for use in levels, including an elongate rod with a barrel-shaped distal section having a crest at its cross section with the greatest diameter and a rod retainer with a cavity which receives the rod such that the distal end of the rod projects from a rod retainer distal opening, the rod being adjustable in relation to the rod retainer so that the crest can be adjustably placed at a preferred position in a molding cavity for vial molding.

Abstract: An apparatus is used to mount a spirit level on an elongate support such as a pipe, length of wood or the like so that the effective “levelling line” is greatly lengthened. The apparatus includes an elastic band having first and second ends and a body member to engage the level, preferably by bridging a rib on the level or by fitting to an aperture formed in the level. The body member has first and second hooks extending from it to receive the first and second band ends, respectively. In highly preferred embodiments, there are two elastic bands and two body members, each with a pair of hooks for engaging and retaining a respective one of the bands.

Abstract: A levelling apparatus for a laser level includes a base having a central axis and a sphere-shaped socket component mounted to the base. A sphere-shaped ball device is received in the socket component for relative movement with respect thereto. A retention mechanism is spaced radially outwardly from the central axis and includes first and second locking members in overlapping relationship to one another, thereby retaining the ball device in the socket component. In a second embodiment of the levelling apparatus, the sphere-shaped ball device is mounted to the base and the sphere-shaped socket component mounted to the ball device for relative movement with respect thereto. The retention mechanism is in registry with the central axis and includes first and second locking members in overlapping relationship to one another, thereby retaining the socket component to the ball device. Other embodiments are also disclosed.

Abstract: A levelling apparatus for a builder's laser level includes a base having a central axis and a sphere-shaped socket component mounted to the base. A sphere-shaped ball device is received in the socket component for relative movement with respect thereto. A retention mechanism is spaced radially outwardly from the central axis and includes first and second locking members in overlapping relationship to one another, thereby retaining the ball device in the socket component. In a second embodiment of the levelling apparatus, the sphere-shaped ball device is mounted to the base and the sphere-shaped socket component mounted to the ball device for relative movement with respect thereto. The retention mechanism is in registry with the central axis and includes first and second locking members in overlapping relationship to one another, thereby retaining the socket component to the ball device.

Abstract: The improved builder's level is used by carpenters, masons and the like for determining parallelism or perpendicularity with respect to a horizontal plane. The level has opposed depressed channels extending along its length, thereby permitting the level to be more securely gripped. The body of the level has interior ridges and an interior web for reinforcement and to properly position liquid-containing vials in such body.

Abstract: A vial for a builder's level includes a body with an interior wall and a body cavity containing a bubble. A marker ring is exposed in the cavity. In the improvement, the ring is embedded in the body and the interior wall and the ring have surfaces machined and coextensive with one another. The bubble moves smoothly across the machined wall and ring surfaces. A new method for making a level vial includes providing an intermediate vial product with a body wall having at least one marker ring embedded in it and machining the wall and the ring to form a wall surface free of discontinuities. The intermediate vial product is also disclosed.

Abstract: A liquid vial assembly comprises a liquid-containing vial having a seamless cylindrical wall and a transparent outer sleeve extending along the wall. The resistance of the vial to breakage is dramatically improved. The sleeve may be made of a resilient material capable of being slightly stretched (PVC tubing, for example) or of a hard material such as polycarbonate or tempered glass. Either material is preferably non-shatterable. A new method for making a liquid vial assembly is also disclosed.

Abstract: A threaded coupling in which the connecting threads are carried on a replaceable sleeve which snap locks onto the end of the primary member such that the thread unit may easily be assembled on or removed from the primary member and replaced when worn or damaged.

Abstract: A connector construction employs a tail piece having a ball end, a socket element having a distendable end adapted to be snapped over said ball end and a coupling nut adapted to house the ball end and socket while threadedly engaging a pipe distal end to be connected thereto. The nut, when threaded into engagement with the pipe element, urges the socket element into fluid sealing engagement with the ball end and nut regardless of the angular disposition of the tail piece relative to the pipe element. The provided connector is particularly adapted for use with water meters or in similar applications in which spaced pipe ends or conduits to be interconnected by an interposed meter or the like are misaligned.