A method of swing on a swing is disclosed, in which a user positioned on a standard swing suspended by two chains from a substantially horizontal tree branch induces side to side motion by pulling alternately on one chain and then the other.
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| Number | Title | Issue Date |
| 7419325 | Tube assembling device A tube assembling device consisting of hub-carriers and hubs for erecting three-dimensional structures. The hub-carriers consist of two pairs of half-rings, bearing tongues offset by 90° along an antero-posterior axis and linked by four connecting lugs, they suppor... | 09/02/2008 |
| 7066778 | Construction kit Construction kit with two- and/or three-dimensional construction elements (1, 9) with magnetic elements (4) in the corners and/or sides and ferromagnetic spheres (11), which can be placed between the magnetic elements (4) of adjacent cons... | 06/27/2006 |
| 6866514 | Gel electrophoresis training aid and training kit A gel electrophoresis training aid is provided. The training aid includes a substantially transparent elastomeric body having at least one series of spaced-apart wells. The elastomeric body is adapted with a plurality of spaced-apart bands extending in the same dire... | 03/15/2005 |
| 6652285 | System which can reversibly reproduce itself It is described a system of independently moving elements with characteristics making them bind reversibly to each other according to certain rules such that they form self-replicating and mutating polymers subject to the general principles of natural sel... | 11/25/2003 |
| 6343937 | Block A block includes a hole provided on one side of the block, two fifths of the length of the block from one end, and a pin provided on the opposite side of the block two fifths of the length of the block from the other end. The hole is arranged to be connec... | 02/05/2002 |
| 6036497 | Dynamic model of the DNA molecule The invention is a dynamic model of the DNA molecule. The invention includes a multiplicity of physical representations of the four nucleotides. Each physical representation is comprised of T-shaped members having an elongate body attached to a flexible p... | 03/14/2000 |
| 5110297 | Assembly system for demonstrating chemical structures An assembly for obtaining a plurality of cluster structures in either a sequential manner or collectively having a base component portion (10) having an enlarged body (12) to which is attached, by way of flexible straps (21), a plurality of assembly compo... | 05/05/1992 |
| 4892500 | Versatile network of multiple spout balloons A versatile multiple spout balloon network is provided with thin walled resilient, single or multiple spout balloons which may be interconnected to other balloons or a pole using plugs. Plugs provide for resilient and airtight engagement of balloons at th... | 01/09/1990 |
| 4812128 | Three-dimensional molecular model A three-dimensional molecular model comprises plastic modules, each representing on atom connected to one another. Modules intended to represent atoms of cyclic compounds are polyhedrons set in the model so that adjacent polyhedrons touch faces and have a... | 03/14/1989 |
| 4507089 | Mechanical support module for nucleic acid The invention relates to a mechanical support module for the construction of different models of nucleic acids or the like. A module of this type consists of at least one frame (110) carrying a plurality of (n) plates (255) intended for carrying balls represen... | 03/26/1985 |
| 4378218 | Protein molecule model 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... | 03/29/1983 |
| 4184271 | Molecular model A model for representing nucleic acid molecules, such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) consists of a plurality of helical segments secured together in end to end relation in the form of one or two helixes comprising the molecular ... | 01/22/1980 |