Abstract: An arc turbine system includes an elliptical housing, a rotor having two sliding channels positioned centrically to the housing, and two sliding arcs disposed within the rotor sliding channels and slide therein. The sliding arcs are engaging the housing simultaneously at both ends in a near friction-free environment supported by repulsion force of like-pole magnets. Four chambers disposed within two static chambers between the rotor and the long-axis of said housing, the two static chambers further include proper inlet and outlet ports configured to allow fluid and gas flow into and flow out of the static chambers. The system configured in two distinct settings for two distinct uses.

Abstract: An arc turbine system includes an elliptical housing, a rotor having two sliding channels positioned centrically to the housing, and two sliding arcs disposed within the rotor sliding channels and slide therein. The sliding arcs are engaging the housing simultaneously at both ends in a near friction-free environment supported by repulsion force of like-pole magnets. Four chambers disposed within two static chambers between the rotor and the long-axis of said housing, the two static chambers further include proper inlet and outlet ports configured to allow fluid and gas flow into and flow out of the static chambers. The system configured in two distinct settings for two distinct uses.

Abstract: A Turbocombustion engine for conversation of combustible fuel to rotating energy includes a cylinder, piston, connecting rod and crankshaft system for suction and compression and a rotor for expansion and exhaust. Combustible fuel is compressed within a combustion chamber separate from the cylinder and the combustion force applied directly to the rim of the rotor as in turbines with much larger capacity than the cylinder, converting the entire combustion force at maximum torque to rotating energy. The combustion chamber also includes a variable compression ratio system that constantly adjusts the compression ratio within the combustion chamber for optimum performance of the engine under all variables.

Abstract: A motion conversion system by which near 100% of a reciprocating motion, and a rotary motion, fluently converted from one to the other includes, a drive shaft (20), an intermediate circular element (22), externally teethed to near one-half of its circumference and an elongated element (24), having a pair of opposed internal teeth and internal curves, forming an elongated hollow to accommodate and constantly engage with the circular element. Due to their geometry and geometrical relationship, the three elements (20), (22) and (24), throughout the full cycle of reciprocating motion of the elongate element (24) and rotary motion of the drive shaft (20), remain fully engaged without interruption and with no further requirement for any additional gear engagement support. Simplicity, versatility, efficiency and easy to implement characteristics of the present invention, makes it the most practical arid effective motion conversion system of its kind.

Abstract: A self-contained anti-skid device to be used with a pneumatic tire (32) for boosting traction against slippery roadways covered with ice and snow while all designated characteristics of the tire against other road conditions are fully preserved, comprising: a plurality of projectable and retractable anti-skid pins (20) to be positioned radially at a tread (34) of the tire (32) for being projected from the tread (34), as often as required, when a plurality of expandable pneumatic chambers (26) adjacent to the pins (20) are pressurized using merely a fraction of the actual pressurized air of the tire (32). To retract the pins (20), air from the expandable pneumatic chambers (26) is released and preferably recycled back into the tire (32) through an air recycling device (64) implanted within the tread (34) and actuated by rotation of the tire (32) on a roadway. An air valve directs a flow of air from the tire (32) to the expandable pneumatic chambers (26) and therefrom preferably to an air recycling device.

Abstract: An adjustable tissue box (20) for accommodation of tissues (26) significantly larger in quantity, in comparison with an average tissue box, while all tissues (26) are allowed to be successively dispensed, comprising: a series of ascending steps (22) and a tissue tray (24). The ascending steps (22) are formed by way of series of triangular holes (23) punched to the two opposites walls of the box (20) and bent to elongated V-shapes. The tissue tray (24) that is preferably made of cardboard, is placed under the tissues (26), to advance the tissues toward the opening (28) of the box (20) as required. The bouncing capacity of the walls of the box (20), allows the tray (24) to fall in place without being damaged or damaging the steps (22) as it shifts from one step to the next.