Abstract: A mechanism for moving an X-ray source around the patient's head so that the image of an object, having shape of the dental arch, can be obtained on the film, the mechanism including a stationary frame, a rotatably movable support arm with an X-ray source and a film holder attached to its opposite ends on different sides of the object to be radiographed, and means for moving the center of rotation of the support arm rectilinearly during the radiographing, throughout the procedure in the same direction, perpendicular to the axis of symmetry of the dental arch, in such a manner that the position of the center of rotation in its rectilinear movement is dependent on the angular position of the support arm at any given moment, with the purpose of directing the X-ray beam from the X-ray source so that at any given moment it is substantially perpendicular to that part of the object which has the shape of the dental arch.

Abstract: An inhalation device for dispensing a powdered medicament from a medicament-holding container having a first part which is an elongate housing having a passageway for the movement of air therethrough, one end of the housing being an output end adapted for insertion into the mouth or nasal passage of the user thereof, the passageway terminating in an emptying chamber at the output end of the housing, the cross-sectional area of the passageway being less than the cross-sectional area of the emptying chamber, and means for receiving the second part of the device which is a carriage moveably connected to the first part and having means to receive a medicament-holding container so that when an open end of the medicament-holding container is placed adjcent the inner end of the emptying chamber during inhalation the medicament is dispensed from the container.

Abstract: Flame retardant latex bases having an excellent balance of properties are prepared most efficiently and economically by blending together two separately polymerized latexes of different types, the polymeric content of one of said latexes being formed predominantly from a monomer mixture consisting of from about 70 to about 92% by weight vinylidene chloride and 8 to 30% by weight of certain polar comonomers principally of the lower alkyl acrylate class while the polymeric content of the second latex is formed from a monomer mixture consisting predominantly of styrene and butadiene. This technique of producing the desired flame retardant latex bases by combining two separately prepared but simpler component latexes not only maximizes quality control and manufacturing flexibility but also permits the simultaneous realization of higher conversions and reduced polymerization cycles or residence times so that productivity is also maximized.

Abstract: 2-Naphthyl acetic acid derivatives and the corresponding amides, esters, hydroxamic acids and addition salts thereof, optionally substituted at the .alpha.-position on the acetic acid moiety and/or at position 6 and/or at positions 1, 4, 7 or 8 on the naphthyl ring and optionally saturated at positions 3 and 4, are anti-inflammatory, analgesic, antipyretic and anti-pruritic agents. A pharmaceutical method of effecting treatment of inflammation, pain, pyrexia and pruritus by the administration of naphthyl acetic acid derivatives. A pharmaceutical composition for use in the treatment of the above maladies comprising a naphthyl acetic acid derivative.

Abstract: A dental handpiece is disclosed having at least two connectable portions and having a substantially rigid connection between the two connectable portions, there being resilient means forming a portion of the substantially rigid connection. The resilient means inhibits transfer of vibration from one of the connectable portions which contains a gas-driven motor to the other connectable portion which provides a hand-grippable surface.

Abstract: A breath-actuated inhalation device for dispensing a powdered medicament from a powdered medicament-holding capsule, comprising an elongate housing having a passageway for the movement of air therethrough, one end of the housing being an output end adapted for insertion into a user's mouth or nasal passage, the passageway having an inlet end terminating in an emptying chamber at the output end of said housing, the cross-sectional area of the passageway being less than the cross-sectional area of the emptying chamber, and means associated with said housing for receiving a powdered medicament-holding capsule. A collar surrounds at least a portion of the periphery of the housing adjacent the emptying chamber and has at least one substantially flat surface with a notch therein, which allows a first, smaller part of a two-part capsule to fit therein but which is too small to allow the second, larger part of the capsule to fit therein.

Abstract: Benzene ring substituted benzimidazole-2-carbamate derivatives represented by the formula: ##STR1## where R is a lower alkyl group having 1 to 4 carbon atoms; ##STR2## is a 5, 6, 7 or 8 membered heterocyclic ring containing 1 or 2 hetero atoms; the ##STR3## substitution being at the 5(6)-position; and the pharmaceutically acceptable salts thereof. The compounds are useful as pesticides, particularly as anthelmintic and antifungal agents.

Abstract: A novel spherical implant pellet containing estradiol, estradiol benzoate, or mixtures thereof as the sole active ingredients which exhibits a substantially constant drug release rate over a timer period and substantially abrupt termination of drug release at the end of the time period is prepared which has an inert spherical core of a diameter of about 2-10 mm and a uniform coating of about 0.05-1 mm completely covering the core, the coating comprising about 5-99% suitable carrier and 1-95% drug. A drug may be administered at a constant rate over a chosen period by implanting the novel pellet and the release is substantially abruptly terminated at the end of said period without removing the pellet.

Abstract: This application describes a dental burr including a cutting surface having one or more grooves therein, each of the grooves being defined by a plane which encircles the cutting surface at a skewed angle with respect to the axis of rotation of the burr. Such groove(s) provide an oscillatory chip clearing action as the burr rotates to give edge cutting and fast chip clearance. The cutting surface has abrasive particles coated thereon.

Abstract: This invention is a composition useful for dyeing keratinous fiber brown without using o-, m- or p-phenylenediamine, 2,4-diaminoanisol or nitro compounds. The composition consists essentially of 1,5-dihydroxynaphthalene, m-aminophenol, p-aminodiphenylamine or a suitable acid addition salt thereof, a suitable modifier, a suitable coupler and a suitable base. This composition in combination with an oxidizing agent dyes hair brown.

Abstract: Novel dental pins having a first shaft, a handle secured to one end of the first shaft, and a second shaft connected to the handle at a point substantially directly opposite the attachment of the first shaft. Each shaft preferably has a roughened or uneven surface to improve the retention of that portion thereof which remains in a pre-drilled hole in a patient's tooth. Each shaft also has a fracture groove between the leading portion of the shaft and the handle so that the handle and the remaining portions of the shafts adjacent thereto can be separated from the leading portions which remain in the pre-drilled holes after insertion. Preferably, each shaft has a self-tapping flute at the leading edge thereof which cuts a thread into the dentine as the shaft is rotatably inserted therein.

Abstract: An apparatus for controlling the actuation of a light for illuminating the work zone adjacent the operative end of a dental handpiece. The apparatus includes (a) switch for actuating a light source when a signal is transmitted to the actuating switch from the power transmitting line for the dental handpiece, (b) line for transmitting the signal to the actuating switch from the power transmitting means for the handpiece, and (c) delay shutoff switch associated with the actuating switch for maintaining the light source on for a predetermined period of time after transmission of power to the operative end of the handpiece is terminated and then causing the light source to be extinguished at the end of the predetermined period of time.

Abstract: This invention is a composition useful for dyeing keratinous fibers black without using o-, m- or p-phenylenediamine, 2,4-diaminoanisole or nitro compounds. The composition consists essentially of 1,5-dihydroxynaphthalene, 4,4'-diaminodiphenylamine or a suitable acid addition salt thereof, p-aminodiphenylamine or a suitable acid addition salt thereof, a suitable modifier, a suitable coupler and a suitable base. This composition in combination with an oxidizing agent dyes hair black.

Abstract: This invention is a composition useful for dyeing keratinous fiber blond without using o-, m- or p-phenylenediamine, 2,4-diaminoanisole or nitro compounds. The composition consists essentially of m-aminophenol, p-aminophenol, p-methylaminophenol or a suitable acid addition salt thereof, a suitable modifier, a suitable coupler and a suitable base. This composition is combined with an oxidizing agent before contacting the hair to dye hair blond.

Abstract: This invention is a composition useful for dyeing keratinous fiber red without using o-, m- or p-phenylenediamine, 2,4-diaminoanisole or nitro compounds. The composition consists essentially of .alpha.-hydroxynaphthalene, p-aminophenol, a suitable modifier, a suitable coupler and a suitable base. This composition is combined with an oxidizing agent before contacting the hair to dye hair red.

Abstract: Valuable 2-aryl-propionic acids are prepared by the direct coupling of aryl magnesium bromides with a mixed magnesium halide complex of alpha-bromopropionic acid.

Abstract: Visual defects of the human eye in the form of refractive errors such as myopia, hyperiopia, astigmatism, athakis and keratoconus are corrected by a therapeutic method which includes the step of fitting to the patient's eye a corrective contact lens fabricated from a copolymer of a polysiloxanylalkyl acrylic ester and an alkyl acrylic ester. These visual corrections are made in accordance with this method with concommitent reduction in corneal edema since lenses so used have improved oxygen permeability. According to the preferred practice of this method, the lenses utilized have improved wettability which increases wearing confort and reduces interference with corneal metabolism, thereby extending the time period during which the corrective effect of the method is achieved. The corrective effect of this method is also enhanced by the capability of the lenses utilized therein to be precisely machined and polished.

Abstract: An inhalation device having an elongate housing having a passageway for the movement of air therethrough. The passageway terminates in an emptying chamber adjacent that end of the housing which is adapted for insertion into the mouth or nasal passages of a user thereof. The housing has means for receiving and opening a container holding a unit dose of powdered medicament for administration. The opening means includes first means for placing the interior of the opened capsule in communication with the atmosphere and second means for placing the interior of the opened capsule in communication with the emptying chamber via the passageway in the housing. During inhalation, air drawn through the first means causes the powdered medicament to be expelled from the container through the second means, the passageway and the emptying chamber into the nose, throat or lungs of the user where beneficial or therapeutic action of the medicament occurs.

Abstract: 2-Naphthyl acetic acid derivatives and the corresponding amides, esters, hydroxamic acids and addition salts thereof, optionally substituted at the .alpha.-position on the acetic acid moiety and/or at position 6 and/or at positions 1, 4, 7 or 8 on the naphthyl ring and optionally saturated at positions 3 and 4, are anti-inflammatory, analgesic, anti-pyretic and anti-pruritic agents. A pharmaceutical method of effecting treatment of inflammation, pain, pyrexia and pruritus by the administration of naphthyl acetic acid derivatives. A pharmaceutical composition for use in the treatment of the above maladies comprising a naphthyl acetic acid derivative.

Abstract: A dental pin used in building a superstructure on a tooth having a substantial portion thereof that has been removed. The pin comprises a shaft having a flute at the lower end thereof. The remainder of the shaft is threaded. The flute taps a hole that has previously been drilled in the tooth, and the threads on the shaft are retained in the tapped hole. Thus, the shaft is self-tapping. The shaft also includes an integral handle which permits the rotating of the pin into the tooth. A plurality of the pins are inserted in the tooth in a non-parallel relationship, and a superstructure is built on exposed portions of the pins. A fracture point is formed on each pin in order to break the head off after the pin has been inserted.