Abstract: The invention includes a controller-mechanical assembly for a shower head and the electromechanical valve actuated by a contactless sensor in response to momentarily waving of the hand momentarily raised above the head of the user. The assembly for remotely controlling the flow of fluid in showers includes a contactless sensor to actuate at least one electromechanical valve to turn on and off the flow as desired by the user. The actuation logic includes stimuli such as motion or interruption of wireless signal by a raised hand. The valve assembly includes a manually operated bypass valve to override the electromechanical valve, in case the electrical system malfunctions or power supply is down. In another embodiment, the controller-mechanical assembly and the shower head are integrally made for compactness and both have a common wall between them and has water passage in the wall connecting each other.

Abstract: A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air inlet passage is substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially parallel to the piston pin and the single air inlet passage is laterally off-set from the air-fuel inlet passage. The transfer passages are cover by plates to make them closed passages having opening at the transfer port in the cylinder and opening in the crankcase chamber for periodical gaseous communication between the crankcase chamber and the combustion chamber.

Abstract: A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air inlet passage is substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially parallel to the piston pin and the single air inlet passage is laterally off-set from the air-fuel inlet passage. The transfer passages are cover by plates to make them closed passages having opening at the transfer port in the cylinder and opening in the crankcase chamber for periodical gaseous communication between the crankcase chamber and the combustion chamber.