A toy including a movable model, components for generating and alternating a magnetic field in response to a direct current, a permanent magnet disposed in the generated magnetic field, and a component for transmitting movement of the permanent magnet in the generated magnetic field to the movable model.

A modular model building structure comprising an integrally-formed base and a plurality of modular units. The modular units are formed so as to fixedly contact with the base with other modular units of the model structure. Further, the modular units are interchangeable, in part, thereby allowing the model structure to be arranged in several alternative configurations.

A substantially all wood, lightweight, inexpensive tool that includes two elongate laterally adjustable base members that have longitudinal slots therein that are removably engageable by dowels to grip marginal edge portions of a sheet covering material therebetween. The span of covering material extending between the base members may be coverite, silk, monokote, solar film, silk span tissue, 3/4 inch fiberglass or the like. The tool when so containing the covering material is caused to overlie ...

A system and method of construction is described for use in the field of model rocketry. Large sizes of model rockets can be achieved for purpose of visibility and accuracy of simulation by use of a structural framework of disks, ribs, and lightweight covering without exceeding weight limitations of the model.

An articulator for casts of a dental model correlates the casts with the condition to be redintegrated throughout a full range occlusal and masticatory registration. The articulator includes an hinged two part flexible element, each of which parts may be a mirror image of the other, or a one piece hinged flexible element having like opposing integrally connected parts. Each opposed end of either type of element supports a sphere to be positioned within a respective one of a cavity formed in each...

An air cleaner for miniature internal combustion engines to be used on model boats, airplanes, and the like, which is comprised of a tubular elastic boot and a removable filter unit. One end of the tubular elastic boot is stretched over and sealingly attached to the air inlet of the engine. Into the other end of the elastic boot member is inserted the filter unit so that all the air entering the engine must pass through the filter. The filter unit is comprised of a porous open cell foam medium w...

An improved method for producing an ice layer suitable for ship model ice tests on a water surface by means of a spraying process is presented. Said improvement comprises the steps of creating a low-temperature atmosphere above said water surface, forming said ice layer by spraying water freezing in said atmosphere, leading said freezing spray onto said water surface, and continuing said spraying process to form thereby the entire or at least substantially the entire ice layer on said water surf...

A preformed dental model base, for use with an articulator, characterized by a flat bottom surface and a flat elevated upper platform surface spaced above other upper portions of the base.

A model train coupler for a truck having a pocket with an upright pivot pin, the coupler including a stem inserted endwise into the pocket and swingable on the pin, a laterally opening hook extending outwardly from the stem, an actuator depending from the closed side of the hook, and a guide extending resiliently from the stem partially across the open side of the hook, said hook having an outwardly convergent end portion for entering engagement between the hook and guide of a like coupler to in...

A model construction tool for use with pins of the type used in model construction comprising a rigid body having opposite ends and a hammer surface at one of the ends adapted for pounding the pins into a surface. The body has a generally annular flange at the other of its ends with at least one slot in the flange for removing pins. The body is constructed of non-magnetic material and a magnet is carried by the body for picking up pins.