A mental functions complexity model is provided that is suitable for demonstrating, in three-dimensional perspective, the interrelationships of the various mental functions performed by the human brain. The model preferably includes an opaque, upturned, hemispherical base fixedly supported by a saddle, a circular, rotatable, translucent, horizontal disc panel on top of and covering the base, a pair of intersecting, semi-circular, translucent, upright discs mounted in perpendicular relationship t...

A molecular model building set for the formation of models of molecules and compounds primarily in the field of organic chemistry is disclosed. The set includes dimensionally accurate model building members (10, 60) that are rotatable about their axes, and can be interconnected and/or interlocked to form specific molecular models. Model building members depicting a double molecular bond (80) and a triple molecular bond (90) are also provided and can be interconnected and/or interlocked with the ...

A mounting for casts of a dental model correlates the casts with the condition to be redintegrated throughout a full range of occlusal and masticatory registration. The mounting includes separate duplicate members, each of which members is attachable to a cast of a dental model and supports a spherical cavity, and an hinged two part flexible element, each of which parts is a mirror image of the other and supports a sphere to be positioned within respective ones of the spherical cavities and adhe...

A ball-and-stick model system representing alpha carbon positions and the peptide link between adjacent alpha carbons as modeling elements of two-piece sets. Each two-piece set comprises complementary ring rods and ball rods, the latter having a generally cylindrical body enlarged at one end to a sphere form with a slot through a portion of the enlargement. The ring rod also includes a generally cylindrical body with an enlarged end portion to fit snugly within the slot of the ball rod so that w...

A ship suitable for mounting in a bottle comprising a hull having a generally horizontal deck, a plurality of masts, a plurality of yards on each mast, openings in the deck, each of which is shaped to receive the end of one of the masts and in which the end of the mast is pivotably seated to permit the masts to be raised from a lowered horizontal position. A plurality of rigging lines extend from spaced locations on each mast downwardly laterally to be secured to the outside of the hull on both ...

A demonstration head model for different styles of coiffures includes a head model body and a plurality of pattern elements which are attached to the surface of the model body. The pattern elements may be formed as sheet elements preliminary cut in accordance with a predetermined length and shape corresponding to locks of hair being cut. The pattern elements may also be formed in the form of curlers. By positioning the pattern elements in a predetermined order on a catching band which covers the...

A control unit for model vehicles, such as model railway trains, model automobiles, etc. For independent operation of several model vehicles on a common electric circuit, it is known to allocate to each model vehicle a receiver coded in relation with hardware and controlled according to a binary word consisting of an address part and a data part. Control units of this type, however, have the disadvantage that they cannot be operated on analog electric circuits. With the invention, a control unit...

A tension model device is disclosed which has: Three struts which cross each other at or near the center portion of each strut; and a plurality of corresponding tension strands. The strands are joined from each end of all the struts to each end of the other struts. To facilitate assembly, a removable block is inserted where the struts cross each other. The block has three notches on its surface that engage the struts and space them from each other.

A thermal model of an electric apparatus such as a transformer or motor, from which signals can be obtained representing temperatures of the conductors and of the adjacent core material, includes storing first and second values, respectively, representing conductor temperature and core material temperature. The magnitude of the current(s) in the apparatus is sensed and a digital signal representative thereof is added to the first value to represent heat generated in the conductors. Values are de...

A hinge for control surfaces of model aircraft, comprising a first hinge member formed with a lateral keyhole slot for removably engaging a lateral barbell portion of a second hinge member. The first hinge member is preferably attached to a fixed structure of the aircraft with the second hinge member attached to a control surface, such as, an aileron or elevator. Relative rotation of one hinge member with respect to the other hinge member allows the lateral barbell portion to operatively engage ...