Abstract: Improved accuracy of grinding glass pieces for use in stained glass art and the like. The pattern of the final outer boundary of each piece of glass is traced onto frosted mylar tracing paper to create a mask. The mask is then cut to the traced pattern and is adhered to a piece of untrimmed glass of area greater than that of the mask, using water resistant adhesive. The outline of the pattern is rendered opaque, for example by an ink marker. Thus prepared, the untrimmed glass is abraded on a powered abrading machine having a flat, horizontal work table, a rotatable abrading element disposed to engage a workpiece supported on the work table, and lamps operating at low voltage arranged to back light the workpiece from therebelow. The untrimmed workpiece exhibits a brightly illuminated zone extending outside the opaque zone of the mask, thus emphasizing glass to be eroded. The workpiece is urged against the rotating abrading element until the illuminated zone is eliminated.

Abstract: Improved accuracy of grinding glass pieces for use in stained glass art and the like. The pattern of the final outer boundary of each piece of glass is traced onto frosted mylar tracing paper to create a mask. The mask is then cut to the traced pattern and is adhered to a piece of untrimmed glass of area greater than that of the mask, using water resistant adhesive. The outline of the pattern is rendered opaque, for example by an ink marker. Thus prepared, the untrimmed glass is abraded on a powered abrading machine having a flat, horizontal work table, a rotatable abrading element disposed to engage a workpiece supported on the work table, and lamps operating at low voltage arranged to back light the workpiece from therebelow. The untrimmed workpiece exhibits a brightly illuminated zone extending outside the opaque zone of the mask, thus emphasizing glass to be eroded. The workpiece is urged against the rotating abrading element until the illuminated zone is eliminated.

Abstract: Method and apparatus for visually grouping and organizing endodontic files for expeditious selection and use during a root canal procedure. The method calls for marking reference points for each root canal on the crown of the tooth to be treated, using distinguishing colors or other visually perceptible characteristics. The reference points so color coded correspond to colors marked on a file holder, so that a dental practitioner can quickly and accurately select a file from an array of prepared files, wherein the selected file is appropriate for a tooth being addressed at any one point during the procedure. Files associated with any one root canal are held in a portion of the file holder bearing a distinctive color, and thus can be readily identified as being associated with one another. Marking the tooth with a similar color enables the several files prepared for any one root canal to be quickly associated with the correct root canal.

Abstract: A gauge serving as a jig to adjust exposed length of endodontic files with respect to respective encircling resilient stops which prevent overpenetration into a root canal of a patient. The gauge has a body bearing four parallel, coplanar tracks for slidably receiving an equal number of slides. Each slide has a plurality of spaced apart steps enabling endodontic files to be adjusted to differing operating lengths, and a thumbscrew which secures the slide in place within its track. The thumbscrews are arranged to establish a two discrete levels of friction, the first enabling fine adjustment and the second locking the slide in place. A retaining barrier formed in the body has a plurality of openings for each track, thereby being able to receive and make multiple adjustments to several files when the latter are placed against any one slide. Measurement indicia are optionally borne near one or more tracks, for setting the slides to correspond to radiographic lengths of a patient's root canals.

Abstract: The following specification discloses a conformable elastomeric diving suit, known in the art as a wet suit. The suit includes conduits for delivering heated fluid, preferably water, to the diver at different portions along the diver's body by means of a conduit that has been formed as an elongated hollow member that can be stitched or adhered into the suit's seams. The conduits have openings that relate to those portions of the body to which hot water is to be delivered between the diver's skin and the interior of the wet suit. The conduits are extruded or made from plastic or elastomeric material that is stitched or adhered to seams within the wet wuit material, so as to provide one continuous seam or joining member in the seam, which serves to provide the hot water flow to the diver for heating purposes.

Abstract: A buoyancy compensator having a combined capability. The combination is in part provided by a pressure relief valve having a spring loaded valve plate for closing off the interior of the buoyancy compensator. The buoyancy compensator has a hand actuated inflation apparatus which receives a tube connected at its other end to a source of gas under pressure such as a first stage regulator. The tube or hose is inserted in the apparatus and is partially valved by a Shrader type valve configuration in an end fitting thereof. The vest is provided with a plug and fitting wherein the inflation apparatus can be utilized optionally by subsequent implacement or retrofitting the vest with the inflation apparatus. The buoyancy compensator vest also incorporates an oral inflator which utilizes a plunger operated valve for filling the vest. In cases of emergency, a charged bottle of gas can be punctured to fill the vest to allow a diver to rise rapidly to the surface.