Abstract: A toy has an elongate body dimensioned to be held in the hand. A whistle or reed responsive to the passing of air to produce a sound is positioned at at least one end of the elongate body. Throwing the body through the air produces a sound.

Abstract: A magnetic device for retaining a dental prosthesis on a jawbone. Magnetic material is solidly fastened in a support adjustably movable in a frame rigidly fixed to the prosthesis for interacting with magnetic material seated in a cavity in the jawbone. A threaded eccentric gear and a rack cooperate with pinions accessible from outside the frame, for respectively adjusting the relative positions of the magnetic materials axially and laterally.

Abstract: A hollow structural element has a hollow member having a circumferential wall and a side wall which closes one of the axial ends of the circumferential wall, a cover member arranged to close the other end of the circumferential wall of the hollow member and connecting elements for connecting the structural element with other structural elements. The connecting elements include an undercut projection provided in the cover member and arranged for inserting into an undercut groove of another structural element, and an undercut lateral slot provided in the side wall of the hollow member and arranged for engaging with an undercut projection of a further structural element. The lateral slot has a first enlarged portion through which the projection of the further structural element can pass, and a second reduced portion extending from the first portion toward the axis of the circumferential wall and dimensioned so that the projection of the further structural element engages in the reduced portion.

Abstract: Disclosed is a device advantageously usable for dental therapy and examination, which is an elongated bundle of axially extending fibers. The elongated bundle is tapered at one or both of its ends, and the fibers are bonded to each other in places along their lengths so that the fiber bundle is coherent and the fibers define capillary passageways therebetween.

Abstract: A multi-propeller propulsion system for model aircraft having a single engine and positive driving connections between the engine and each of the multiplicity of propellers. The positive drive may include toothed pulleys and serrated belts and gearing for example.

Abstract: The element is adapted to be fitted as an annular band around a tooth and to be secured to a dental appliance to hold the same in position. It includes a strip metal element having two end portions, which are adapted to overlap in the annular band, a first slide-snap fastener part, which is carried by one of the end portions and includes a tunnel member defining a tunnel passage extending longitudinally of the strip metal element, and a detent spring secured to the tunnel member and extending longitudinally in the passage, a second slide-snap fastener which is carried by the other of the end portions and includes a plurality of barblike oblique detent teeth spaced apart in the longitudinal direction of the strip metal element and movable relative to the first fastener part in a closing direction into the tunnel passage.

Abstract: A beta-titanium alloy wire is used as the force-imparting component in orthodontic appliances. The alloy provides up to a threefold improvement over 18-8 stainless steel wire in load deflection rate and a twofold increase in maximum elastic displacement while providing a low modulus of elasticity and optimum low level force magnitudes. The wire also finds utility as ligature wires, as clasps and related structures in orthodontic and prosthetic appliances and as surgical arch bars for jaw fractures and the like.

Abstract: A hygienic instrument of a disposable type for use in cleaning surfaces within a person's mouth which is composed of a elongate member having a pointed end for picking the teeth and an opposite end with a foam pad or brush impregnated with a cleaning substance and including two laterally extending pegs spanned by a strand of dental floss, the laterally extending pegs being intermediate the length of the elongate member.

Abstract: A swingable toy for creating audible vibratory noises and concentric circles of light. First and second elongate end pieces are perpendicularly secured at opposite ends of a tubular central body portion. Noise-emitting vibratory rubber bands are disposed in a parallel and spaced apart relationship between slots disposed in the first and second end pieces. A stabilizing fin is secured to the tubular body portion in a plane perpendicular to that defined by the rubber bands for maintaining the rubber bands in perpendicular relationship to another plane defined by the swinging orbit for maximum vibratory excitement of the rubber bands. A cord is attached to one end of the tubular body through a metal eyelet and a low friction ball bearing is disposed in the cord to relieve twisting of the cord during swinging of the toy for maintaining the rubber bands in a plane perpendicular to that of the swinging orbit.

Abstract: A toy building set for constructing a toy building includes a plurality of wall plates having anchoring elements and a plurality of connecting members having recesses for receiving the anchoring elements, the recesses having clamping bars extending from opposed walls in the recess to clampingly engage opposite sides of the anchoring elements. Roof elements and other building parts are provided to complete the construction of the toy building.

Abstract: Honing and polishing instrument especially intended for dental use and being provided with a rotatable shaft. A replaceable honing or polishing unit made of a flexible elastic material can be attached to the free end of the shaft. An undercut indent in the unit embraces a radial sleeve at the free end of the shaft. The shaft also has an end portion extending axially beyond the sleeve which is inserted in a corresponding bore at the bottom of the indent in the unit.

Abstract: An improved dental treatment tool includes a rotation shaft with an eccentric rotation plate having a drive pin thereon, and a vertically moving rotation cylinder for allowing a dental drill to move in vertical and horizontal directions. The rotation plate and the drive pin are engaged respectively with two portions of the vertically moving rotation cylinder so that the vertically moving rotation cylinder is automatically caused to rotate horizontally and move up and down, to thereby provide an excellent dental treating operation.

Abstract: In a process for the growing of aquatic animals in a controlled environment wherein water is continuously circulated through a tank, the improvement which comprises introducing fresh water into said tank having an inner wall; at the upper rim sufficiently tangential to said inner wall of the tank and at a sufficient rate to maintain a circular water flow throughout the tank, and discharging wastewater at the lower end of the tank.

Abstract: A bracket has a longitudinal channel adapted to receive a wire arch. A retaining member is rotatably mounted in the bracket body and includes a retaining spider which is angularly movable to first and second retaining positions, in which the retaining spider extends across at least part of the width of the passage. The retaining spider is adapted in the first retaining position to slidably retain a wire arch in the channel and in the second retaining position to clamp a wire arch in position in the channel.

Abstract: A dental anchor magazine housing a dental anchor therein is disclosed, where the dental anchor is for anchoring a superstructure to a tooth. The dental anchor includes threaded sections and an L-shaped manipulating end section joined together by frangible reduced thickness portions. The dental anchor magazine includes a body member having a conical front end, and a square shaped rear end for rotating the magazine about its longitudinal axis. A centrally located passageway extends longitudinally through the body member to receive the dental anchor therein. A slot extends transversely through the body member into communication with the passageway for longitudinal movement of the manipulating section of the dental anchor therein.

Abstract: Dentures or denture elements that are anatomically related to Camper's Plane are prepared employing the relator assembly of the present invention. The relator assembly is composed of (i) a vertically disposed support that is maintained in position with a stand member; (ii) a horizontally disposed occlusal base member; (iii) a maxillary base member that is pivotably connected to the upper portion of the support, the lower surface of the maxillary base member positioned in substantial vertical alignment with and in a plane parallel to the upper surface of the occlusal base member; (iv) cast positioning element located on the lower surface of the maxillary base member; (v) a labial drape locator that is adapted to be positioned on and removed from the upper surface of the occlusal base member; and (vi) an arch locator that is adapted to be positioned on and removed from the arch locator holder element of the labial drape locator.