Abstract: A toothbrush is provided with a base and handle having a flexible neck portion in order to clear the lip and chin. A stepped neck portion is provided whereby the thickness of the flexible neck portion is substantially less than the thickness of the base, the length of the neck portion being substantially greater than the length of the base, the width of the entire neck portion is substantially less then the width of the base, and the entire thickness of the neck portion is less than the entire width of the neck portion. A stepped end face is provided at the end of the base and the surface of the base is disposed at an angle facing away from the handle front face.

Abstract: In combination, a metal sheathing of a building, a plastic covering sheet, means for properly attaching said plastic sheet to said metal sheathing comprising a metal clip having a top portion folded over the top of said plastic sheet and having a laterally punched out portion extending through said plastic sheet, a weld pin having one end extending through punched out portion of said metal clip, to contact with metal sheathing.

Abstract: A portable door lock operable from the inside of a door for selectively clamping or unclamping the door latch. Such door lock comprises two halves pivoted together centrally and having confronting serrated semi-circular openings at one end and screw means for selectively pivoting said halves at the other end.

Abstract: A rotating window wiper arm having a pair of semi-cylindrical elements one of which being coaxially mounted on the distal portion of a windshield wiper arm and the other being attached to said windshield wiper functioning to provide an inexpensive and novel connection being adaptively utilized on old and new vehicles preventing wiper hopping and skipping across said windshield resulting in a clean wipe in both directions of movement.

Abstract: A roof drill having a drill bit tip including a plurality of equally spaced, V-shaped serrations.

Abstract: A fiber optic cable attached alongside or extending through the handle of a dental mirror to provide a source of illumination to the mirror. An end of the fiber optic cable is projected towards the mirror. Such end is either flat, shaped as a lens or having a lens attached thereto.

Abstract: A steam locomotive-whistle model and toy providing realism in appearance in sound and operation of a real locomotive, by responding to blowing effort by the mouth or of a balloon which operates parts to run the locomotive and to emit sounds exactly simulating those of a real locomotive. It includes a smokestack and detachable cover, simulating smoke, to prevent air from escaping through its inlet hole. Also it includes a rear air intake pipe which is blown by the mouth to force air into an air chamber, thence into air ports and a cylinder to cause a piston to move away from the air inlet end of the cylinder.

Abstract: A tool for cleaning parts of a bowling machine. The tool includes a base plate having a handle pivotally secured thereto between two opposed side walls and including a planar forward portion having a notch therein which is adapted to manipulate a latch in a bowling machine. A cleaning cloth is provided to substantially cover the base plate and outward portions of the side walls.

Abstract: The present invention pertains to a screwdriver blade. The screwdriver blade comprises a shank having a central axis and a tip portion which extends from the shank. The tip portion has a pair of opposing concave driving faces and a concave terminal end surface. The concave driving faces are torsidal having a first radius R.sub.1 disposed in a plane which is parallel to the central axis. The first radius R.sub.1 has a center disposed at a distance x from a side edge of the concave terminal end surface. The concave driving faces have a second radius R.sub.2 disposed in a plane perpendicular to the central axis. The terminal end surface is cylindrical and has a third radius R.sub.3 which is disposed in a plane perpendicular to the plane through first radius R.sub.1. The tip portion has a width b and a maximum thickness c and preferably, 0.2b.ltoreq. x.ltoreq. 0.5b, 0.2b.ltoreq. R.sub.1 .ltoreq.b, R.sub.2 =Kb.sup.2 /c where K is a constant and 0.5R.sub. 2 .ltoreq.R.sub.3 .ltoreq.2R.sub. 2 and the angle .alpha.

Abstract: In the tin float bath process of flat glass production, proposed automatic recuperative natural gas burners will replace the existing electrical heating elements. The use of natural gas instead of electricity creates a more energy-efficient bath operation, amounting to an approximately seventy percent savings. Control of the burner zones is comparable to that utilized with the replaced electrically heated zones. Combustion air and natural gas are ignited and burned within a heat-radiating chamber. The residue from burnt gases is exhausted externally to the bath and has no contact whatever with the atmosphere inside the bath. Advantages comprise a less complicated installation with minimal maintenance and with little or no replacement parts, all of which contribute to longevity not attained by prior art. Additionally, shutdown of the process is not necessary to remove and replace a possible defective burner, as is required with defective electrical heaters. Only periodic visual inspection is required.