Abstract: The stretch-cotton panty portion of the panty hose includes the combination of stretchable textured thermoplastic yarn forming the outer face and nonstretchable cotton yarn on the inner face. The stretchable and cotton yarns are so knitted as to retain substantially the full stretchable and smooth conforming fit characteristics of lightweight sheer stretch thermoplastic fabric together with the soft sanitary moisture absorbing characteristics of cotton without appreciable bulk, rigidity, or heaviness. The cotton on the inner face is knitted by plating a lightweight cotton yarn on the inner surfaces of selected noncontiguous courses of the stretch thermoplastic yarn.

Abstract: This tube sock is of a medium or dress weight so that the sock may be comfortably worn with dress shoes and includes very long and fine terry loops in the heel and sole area to provide the sock with cushion and comfort characteristics of the type normally provided in heavy weight athletic type socks. The sock is knit on a fine gauge machine of the type normally employed in knitting ladies' sheer hosiery and panty hose, usually provided with 400 needles. The sock is knit on every other or alternative needles so that it contains only 200 wales instead of the normal 400 wales usually contained in ladies' sheer hosiery articles. The terry loops formed in the heel and sole area are formed on dial instruments projected outwardly over an idle needle so that unusually long terry loops are formed of a fine cotton yarn which are three to five times as long as the stitch loops formed of the body yarn.

Abstract: The panty hose, or other type of lower body garment, includes a pair of legs and a panty portion with a crotch patch or insert in the crotch area. The crotch insert is formed by severing a predetermined length from a strip of fabric having a width substantially corresponding to the desired width of the crotch insert so that the insert is substantially diamond-shaped with two of the sides being defined by the diagonal cut lines and the remaining two sides being defined by opposite side edges of the strip. The severing of the strip of fabric to form the diamond shaped crotch insert takes place at the location where the panty hose are formed to eliminate the problem heretofore and encountered in handling crotch inserts of the type which are die cut from wide widths of fabric.

Abstract: A drilling assembly which is particularly adapted for drilling in regions of the earth having permafrost, comprising a relativey large earth auger including at least one helical flight which is welded to a long central tube. The upper end of the auger has a shape such that torque may be readily applied to the auger for rotating the same. Interiorly of the upper end of the tube is a means for mounting a downhole percussion hammer, such that the percussion hammer may be suspended for operation within the tube. Preferably, a substantially solid drill bit having a generally frustoconical (pointed) shape is used in conjunction with the percussion hammer. Also, a means for advantageously providing for admitting more compressed air to the bottom of the hole than would normally be admissible by relying on air supplied to the percussion hammer alone.

Abstract: An easy opening end closure is formed with annular, double folded band adjacent the chuck wall. A weakening line defining a removable panel portion is formed in the center segment of the fold so that the folded edges of the single band provide smooth protective surfaces on both the ledge and the removable panel portion.This disclosure also relates to a method for forming the above described easy-opening end closure wherein the weakening line is formed in the end panel prior to complete formation of the folded band.

Abstract: An easy opening end closure is formed with annular, double folded band adjacent the chuck wall. A weakening line defining a removable panel portion is formed in the center segment of the fold so that the folded edges of the single band provide smooth protective surfaces on both the ledge and the removable panel portion.This disclosure also relates to a method for forming the above described easy-opening end closure wherein the weakening line is formed in the end panel prior to complete formation of the folded band.

Abstract: An easy-opening end closure of the full opening type is formed with the flap-defining score-line located in the vertical chuck wall whereat the cutedge, of that portion of the closure remaining attached to the container after opening, is shielded by the container sidewall.The disclosure also relates to a method for forming the above described easy-opening end closure wherein the scoreline is formed in a horizontal portion of the end panel, said portion thereafter being upset to a substantially vertical position whereat it comprises a part of the chuck wall.

Abstract: Method and apparatus for continuously detecting cracks in aircraft blades while in flight. A hollow blade is sealed with a pressure differential, either above or below atmospheric. A reduction in the pressure differential such as results from cracks, is detected by a pressure sensor having a member which moves between a high pressure differential position and a low pressure differential position. A radiation source, typically a beta source, is carried on the member and moves from a shielded position to an unshielded position when the pressure differential drops. A radiation detector is mounted on a fixed portion of the aircraft and detects radiation from the source when the member moves to the unshielded position. The detector output may be used to operate a go-no go indicator providing a warning signal when the pressure differential falls below a predetermined value, or to operate an analog indicator providing an output varying as a function of the pressure differential.

Abstract: A substantially solid drill bit has a relatively flat face at its forward end; the face comprises a plurality of plateaus, preferably three in number, which are separated by radial relief channels that intersect one another near the center of the face. The sides of the body constitute a frustrum of a cone, preferably having an included angle of about 14.degree., with the narrow portion of the cone being at the base of the body. Spiral grooves extend along the sides of the body, and at least some of these spiral grooves intersect the radial relief channels. A plurality of hardened inserts or buttons are mounted on the face of the bit, and the radial spacing of such inserts from the longitudinal axis of the body is such that there is an overlap of the "track" or "trace" of each insert by the track of another insert, as the body is rotated about its longitudinal axis.

Abstract: A drilling tool assembly comprising an elongated shank having an upper end for receiving driving forces, and having tapered threads at its lower end for engaging a drill head. The shank has first and second downwardly facing shoulders, with one of said shoulders being above the threads and the other shoulder being below the threads. A removable drill head has tapered threads for engaging corresponding shank threads along substantially the full length thereof. The drill head also has first and second upperwardly facing shoulders adapted to respectively bear against the first and second shoulders on the shank. The drill head shoulders are positioned such that they are still separated from the confronting shank shoulders by a gap when the threads of the two elements initially make up along the pitch line during their assembly. The gap optimally falls within the range of about 0.010-0.

Abstract: A multiple use, flexible, elastomeric liner for forms for concrete faced walls prepared by having a series of rigid panels in side by side relation, includes panels of liners for rigid panels having a concrete contacting face of a flexible, elastomeric synthetic polymer used throughout as a negative mold of a desired design in the finished concrete and having an opposed planar surface for face engagement with the form panels. The liner panels will not support the concrete for the wall without the backing panels. The elastomeric liner is a soft, flexible, resilient, elastomeric synthetic polymeric material which permits sharp relief designs having undercuts, and in edge engagement with similar panels squeeze together for a seamless surface in the completed concrete while leaving the impression of itself in exact detail in the hardened concrete.