Abstract: A method of forming a tubular frame, e.g., a bicycle frame, from two substantially symmetrical frame-halves utilizes a plurality of interconnected half-tubular elements. Each half-tubular element has an exterior surface, an interior surface, and longitudinal edges that extend between the exterior and interior surfaces in the direction of the longitudinal axis of the half-tubular element. The surfaces of the longitudinal edges of the half-tubular elements are shaped such that corresponding edges of corresponding half-tubular elements in the left and right half-frames may easily be interengaged, and adjusted along the respective longitudinal axes of the half-tubular elements that are being joined. Preferably, the longitudinal free edges are stepped in the radial direction such that each level is substantially planar and smooth along the respective longitudinal axis of the half-tubular element.

Abstract: An improved optical putter. The optical putter has a club head whose cross-section is characterized as having four active surfaces: a substantially flat surface for resting the club head upon the green in a first alignment position; a ball-addressing surface; a second, substantially flat, reflective surface for aligning the golf club in a second alignment position; and a substantially flat bottom surface that is substantially perpendicular to the ball-addressing surface. The reflective surface is a semi-circular wedge shape having a sighting line for guiding the golfer to position her or her head and stance. Depending upon the alignment position, the reflecting surface can face upwardly towards the eye of the golfer or towards the cup of the green.

Abstract: A method of aligning and addressing a golf ball upon a putting green in order to stroke and putt the golf ball into a cup of the green, comprising the steps of:a) resting a golf club upon a surface of a putting green with its shaft disposed at an acute angle with respect to the surface, in order to position a golfer with respect to a club head of the golf club, wherein his or her eye is directed directly over a reflective surface of the club head when addressing a golf ball, and a grip of said shaft being extended at an angle and adjacently to the side of the golfer;b) presenting the golf club in an addressing position, so that the club head is adjacent a golf ball, and is positioned to putt the golf ball, and the grip of the shaft is disposed in front of the golfer;c) optically aligning the club head towards a cup of the green by sighting a reflection of the cup upon a reflective surface on the club head, and adjusting the club head direction; andd) optically controlling the stroke of the club head by sighti

Abstract: A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium is disclosed. The method comprises incorporating into the medium a corrosion-inhibiting amount of a pyridine salt composition (comprising a quaternary pyridine salt composition and/or a pyridine.HCL salt composition) and a cationic surfactant that forms a bilayer on the ferrous surfaces in the medium. Highly quaternized pyridine salt compositions useful in such method and a method for preparation of such compositions are also disclosed.

Abstract: A method of inhibiting corrosion in an oil well comprises introducing into the well a pourable emulsion comprisinga. 50-95% of a discontinuous aqueous phase (such as ordinary water); andb. 5-50% of a continuous oil phase (such as kerosene or similar hydrocarbon) containing a corrosion inhibiting compound (such as an imidazoline).This method results in more consistent corrosion protection, even if longer treatment intervals are used.

Abstract: Water soluble corrosion inhibitors which exhibit low hydrocarbon carryunder are prepared by reaction of alkylenepolyamines and formaldehyde.