CIRCUIT PATHS AND SAFETY CIRCUITS"

CROSS-REFERENCE TO RELATED APPLICATIONS

This PCT application is based on, and claims priority to, US Application Number 12/639,327 filed on December 16, 2009, the entire contents being incorporated by reference. FIELD OF THE INVENTION

A three-dimensional electro-mechanical system having mechanical structures that produce electrical circuits as an integral part of the mechanical structure is provided. The electromechanical system relates specifically to mechanical structures that easily and quickly connect together. The system has safety circuits in communication with the power supply, which make the system especially suitable for use by children and/or students while learning electronics, mechanics, and/or architecture.

BACKGROUND OF THE INVENTION

Toys and teaching aids exist that use mechanical connectors to quickly assemble electronic circuits. Further, toys and teaching aids exist that use a mechanical connector to quickly assemble mechanical structures. Some of these mechanical structures add a motor for motion or a light for visual effects. These toys are often used to amuse a child or teach some mechanical or electronic principle. Quick connect electronic assembly systems currently being sold usually consist of a box of electronic devices mounted to quick connect electronic modules. Diagrams for electronic circuits are included to educate a student or entertain a child. Most of these circuits are assembled in the same or parallel plane, and the circuit paths are not part of a three-dimensional mechanical structure such as a building, a Ferris wheel, or an airplane, to name just a few.

Examples of previous construction block patents include U.S. Patent No.: 6,443,796 to Shackelford, which provides a child's construction set containing virtual intelligence and is interactive and smart. These characteristics may be exhibited to a player during player construction activity with the set and, thereafter, during continuing play; this instills a sense of unpredictability to play. The set incorporates a programmed controller (17), a speaker (23), special ("smart") play pieces or blocks (1,3,5,7, et cet), and a base (15) on which to position the play pieces or blocks. Sensors (A1-C3), referred to as "hot spots," are distributed at various positions about the base and are coupled to the controller, whereby the controller identifies special play pieces and the location of those play pieces when the respective play piece is installed at one of those positions. Some of the special play pieces may depict characters, some contain electrically operated devices, and some contain a player-operated input device. The controller issues speech messages or other audible effects through the speaker to effect a virtual personality to the character play pieces as well as controls operation of electrically operated devices in special blocks, and detects and responds to player inputs from the player input blocks. Through wireless communication devices, the controller may acquire information from and supply speech messages to accessory blocks that are used off the base of the construction set.

SUMMARY OF THE INVENTION Most electronic circuits are created on a flat surface or base to keep components in close proximity, their connection paths short and to keep the electrical circuits in the same or parallel plane. The current system allows the assembly of electronic circuits and mechanical structures to exist in multiple planes and at distal locations to each other. Further, the present system helps eliminate circuit errors, which can be difficult to detect. More specifically, the circuit errors may be prevented by, for example, placing safety devices that protect and warn the user of electronic assembly errors in the connecting process. The system may also help eliminate shorted power sources during construction by keeping the assembly of these electro-mechanical structures quick, simple, and educational. It is the purpose of this system to use both conductive and non-conductive quick connect or stackable parts that can form three-dimensional mechanical structures. The conductive parts may be used to form electronic paths through the mechanical structure, and the non-conductive parts may be used to insulate and prevent shorts to undesired areas. The system may have an additional power source module that makes an error in the electronic assembly obvious with any combination of sounds, lights, and/or speech.

BRIEF DESCRIPTION OF FIGURES The accompanying Figures illustrate the following:

Figure 1

Figure 1 illustrates a perspective view of an electronically non-conductive construction beam 100 with non-conductive female connectors 101, 102 containing a conductive clip 105, 106, which is mechanically and electronically connected to leads 103, 104 of an electronic component 107.

Figure 2 Figure 2 is a side plan view having the right side wall removed of a non-conductive construction beam 200 showing the two conductive clips 201, 202 and the mechanical connections 203, 204 between the conductive clips 201, 202 and the leads 205, 206 of an electronic component 207. Figure 3

Figure 3 illustrates conductive mechanical parts 300-304 with dashed lines indicating the x-axis 305, y-axis 306, or z-axis 307 along which current paths may exist.

Figure 4

Figure 4 illustrates a non-conductive mechanical part 401 with the same shape and size as shown in Figure 3 that may be used to block current flow between conductive parts 400, 402.

Figure 5

Figure 5 illustrates a battery-powered voltage source module 500 with a Current limiting device 501, an audible tone and speech circuit 508, and a bi-color light-emitting diode (LED) 505 to indicate proper operation or excess current.

Figure 6

Figure 6 illustrates the circuitry associated with the battery-powered voltage source module 500 that contains both visual and audible warning circuits 508.

Figure 7

Figure 7 illustrates an electro-mechanical 750 structure that uses beams to demonstrate the concept of mechanical structures with current paths 710-719, and conductive 721 and non- conductive parts 720 used in the mechanical structure.

Figure 8

Figure 8 illustrates an electro-mechanical 800 structure that uses blocks or bricks to demonstrate the concept of mechanical structures with current paths 809, 816 and conductive 801-808, 810- 815 and non-conductive blocks or bricks 825 used in the mechanical structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A three-dimensional electro-mechanical system having mechanical structures that produce electrical circuits as an integral part of the mechanical structure is provided. The electromechanical system relates specifically to mechanical structures that easily and quickly connect together. The system has safety circuits in communication with the power supply, which make the system especially suitable for use by children and/or students while learning electronics, mechanics, and/or architecture.

Referring now to Figures 1 and 2, a perspective view of an electronically non-conductive construction beam 100 (or 200 in Figure 2) with non-conductive female connectors 101, 102 containing a conductive clip 105, 106, (or 201, 202 in Figure 2) which is mechanically and electronically connected to leads 103, 104 of an electronic component 107 is provided. The conductive clips 105, 106 may be generally flat and may be made for a conductive metal.

Figure 2 illustrates a side plan view having the right side wall removed of a non- conductive construction beam 200 showing the two conductive clips 201, 202 and the mechanical connections 203, 204 between the conductive clips 201, 202 and the leads 205, 206 of an electronic component 207. hi an embodiment, the two conductive clips 201 and 202 may be identical but may mirror each other in orientation. The mechanical connections 203, 204 may be inserted through an opening slit created from the two conductive clips 201, 202. More specifically, the opening slit of each conductive clip 201, 202 may be created by an end of the conductive clips 201, 202 folding back toward itself so that the end of the conductive clip 201, 202 may come into close enough contact with a generally middle portion of the conductive clip 201, 202. The opening slit may have a narrow width which may be smaller than a width of the mechanical connections 203, 204 such that the mechanical connections 203, 204 may be electrically in contact with the conductive clips 201, 202. Further, the mechanical connections 203, 204 may be secured into the opening slits of the conductive clips 201, 202 by, for example, friction. In this embodiment, the mechanical connections 203, 204 may be first inserted into the opening slits and then pressure may be applied to the conductive clips 201, 202 such that the ends of the conductive clips 201, 202 squeeze and grasp the mechanical connections 203, 204. In an embodiment, the mechanical connections 203, 204 may be soldered into the opening slit. The construction beams 100 (or 200 in Figure 2) may have at least two opening channels wherein each lead 103, 104 (or the equivalent 205, 206 in Figure 2) pass through from the electrical component 107 (or 207 in Figure 2) to the conductive clips 105, 106 (or 201, 202 in

Figure 2).

The present system has a power-source module 500, 824 having warnings that may include, for example, audible sound and/or speech circuits 508 and/or a visual indicator 505, 605, 701, 823 when too much electrical current is being removed from the batteries 502-504, 600 to power consuming components of the system. The surfaces on the power-source module housing 500, 824 may be non-conductive so as to prevent the components from being shorted. A current limiting device 501, 601 may limit the flow of electrical current from the direct current (DC) batteries 502-504, 600 by dropping voltage across the body of the current limiting device 501, 601. The addition of a bi-color light-emitting diode (LED) 505, 604, 605, 701, 823 may glow, for example, green when power is on 604 and may turn, for example, red 605 when too much current is being drawn from the batteries 502-504 or may glow when a short between positive electrical paths 710, 719, 816 and negative electrical paths 717, 718, 809 exists. The speaker 507, 602, 708, 821 and circuit board 508, 606 may provide an audible tone and/or speech to indicate that an excessive current condition exists.

The system may have two non-conductive mechanical female connection areas 511, 512, which may provide positive voltage 608 output points through conductive springs or clips 513, which may connect to conductive male connecting 403 mechanical structures. In a similar manner, the non-conductive mechanical female connectors 509, 510 on the other end may provide negative voltage 609 output points through a second conductive spring or clip 514 located at the distal end of the device, to conductive male connecting 403 mechanical structures.

A simple slide switch 506, 607, 700, 822 may be used to turn the positive voltage output 608 conductive springs or clips 513 on or off. A current limiting device 601, 501 may limit the current from the DC power source 600 by dropping voltage across the body of the device 501,

601. The addition of light-emitting diode (LED) 605 may provide a visual indication that too much current is being drawn and/or that a short exists in the system, while the light-emitting diode 604 may provide a visual indication that operation of the system is normal and that the power source 500, 702, 824 is turned on.

A resistor 603 may limit the electrical current through the LEDs 505, 604, 605, 701, 823. In a similar manner, the addition of the circuit board 508, 606 may provide an audible tone through the speaker 507, 602, 708, 821 to indicate that an excessive current condition exists. The circuit board 508, 606 may receive no voltage across it when the current limiting device 501, 601 is in a mode to supply circuit current and not produce a voltage drop. When excessive current is drawn, the current limiting device 501, 601 may produce a voltage drop that may appear across the circuit board 508, 606. As a result, the voltage drop may produce a light through an LED 605, 505, and/or audible warning sounds through the speaker 507, 602, 708, 821.

A switch 506, 607, 700, 822 may be used to turn the voltage from the DC voltage source 502-504, 600 on or off. In this manner, a protected positive voltage may be made available at a plus terminal 608 of the power source 500, 824 with a return current path through the negative terminal 609, 820 of the power source 500, 824. The mechanical parts 300-304, 721, 801-808, 810-815 may be made of any conductive material or the surfaces of the mechanical parts 300- 304, 721, 801-808, 810-815 may be plated so as to make all exposed surfaces electrically conductive. A conductive part 303 may only allow mechanical connection along one axis. Other parts 302 may only allow mechanical connection along two axes. Some parts 301,304 may allow mechanical connection along all three axes. When two conductive parts 300, 302 are connected along the same axis, as shown by the arrow 308 in Figure 3, the electrical current will stay along the same x-axis 305. When two conductive parts 300, 302 are connected at right angles to each other, as shown by the arrow 309 in Figure 3, the electrical current may change from the x-axis 305 to the y-axis 306. In this manner, electrical current can be directed in any direction along any axis. Non-conductive mechanical parts 401, 720, 825 with similar shapes and/or sizes as the parts shown in Figure 3 and/or Figure 8 may be used to block electrical current flow between conductive parts 300-304, 400, 402, 721, 801-808, 810-815 that may be part of the final mechanical structure being assembled. The non-conductive part 401, 720, 825 may be made from any material that does not conduct electrical current. The non-conductive part 401, 720, 825 may, however, be substantially identical mechanically to any conductive part 300-304, 400, 402, 721, 801-808, 810-815 used in the final mechanical structure. When a mechanical structure is built using the electro-mechanical parts described above, certain conductive paths 710-719, 809, 816 may also be created in the structure. Using conventional current techniques, it can be said that the electrical current path 710 may originate at the positive connector spring 513,

709 and may travel along the x-axis, then turn and travel along the z-axis. This electrical current

710 may split into two different currents, one 711 going in the +y axis toward switch SI 705, and the other 712 going in the +y axis toward switch S2706. On the other side of switch SI 705, the current path 713 turns from the +y axis to the +x axis and goes to the light-emitting diode LI 703. After LI 703, the return current path 716 travels first along the +x axis then turns to travel along the -y axis. The current 716 is added to current 715 to produce the current 717, which travels along the +z axis and turns to the -x axis to terminate at the power source 702, 500.

In a similar fashion, current 714 may go through the motor M2704 and may become current 715. Current path 719 leaves the power source along the -x axis and quickly turns to the +z axis to enter switch S3707. The current 718 leaving switch S3707 travels along the +z axis then turns and travels along the +x axis. This current 718 turns again on the -z axis and finally onto the -x axis to the negative end of the power source 702, 500. Since there may be no components to limit the amount of current flow in the current path 719 into switch S3707, or in the current path 718 from S3 707 back to the power source 702, 500, the closing of switch S3 707 produces a short across the power source 702, 500. This excessive current is handled as previously described to warn the user and limit the current levels to a safe value.

When a mechanical structure is built using electro-mechanical parts, the shape of the parts may be blocks or bricks. Conductive paths 809, 816 may be created in the block or brick structure 800, as shown in Figure 8. Using conventional current techniques, it may be said that the electrical current path 816 originates at the positive connector of the power source 824 and travels through conductive blocks 810-815 to arrive at the motor module 817. Block 815 makes contact to the motor 818 through a clip similar to the visible clip 819 shown on the other side of the motor module 817. Electrical current passes through the motor 818 and leaves the motor module 817 through current path 809 that originates at block 801. This current 809 travels through the conductive blocks 801-808 back to the negative side of the power source 824. Block 808 has a cutout view of the corner to show how the conductive block 808 makes contact to the spring or clip 820 on the power source 824. In this manner, the electrical current paths 809, 816 provide power to the motor 818 whenever the switch 822 turns on the power source 824. If the closing of the switch 822 produces excessive current for any reason, the overload on the power source 824 is handled as previously described to warn the user and limit the current levels to a safe value.

Although the mechanical structures 750, 800 have been shown using shapes similar to beams, blocks, or bricks, the structures are not limited to these shapes and could also have been rods, cylinders, star-shaped, L-shaped, and X-shaped, to name just a few. Accordingly, although the invention has been described by reference to a preferred embodiment, it is not intended that the novel electro-mechanical assembly be limited thereby, but that modifications thereof are intended to be included as falling within the broad scope and spirit of the forgoing disclosure, the following claims and the appended drawings.