Abstract: A timepiece includes a time provider providing a current time and an alert timer. The alert timer includes a time setter setting a time interval at the current time as a starting time, a time processor counting the time interval starting from the starting time, and a signal generator automatically and timely generating an alert signal in a punctual time manner when said time processor is finished counting the time interval in responsive to the starting time.

Abstract: A portable article includes a portable item having a primary function and adapted for being conveniently carried by a user, and an alert timer, which is built-in with the portable item, including a time setter setting a time interval at a starting time, a time processor counting the time interval starting from the starting time, and a signal generator automatically and timely generating an alert signal in a punctual time manner when said time processor is finished counting the time interval in responsive to the starting time.

Abstract: A piston for internal combustion engine, compressor or the like, includes a piston ring, a piston skirt having a piston skirt wall. One or more lubricant channels and reservoirs are provided on an outer surface of the piston skirt. Lubricant is conducted to an outer surface of a piston skirt of a piston through the lubricant channels which are communicating an inner surface of the piston skirt with the outer surface thereof. The lubricant is able to be reserved in the lubricant reservoirs provided on the outer surface of the piston skirt to maintain lubrication between the piston skirt and cylinder wall so as to reduce a friction between the cylinder and the piston skirt, reduce loss of power due to friction and heat, improve the output power, reduce the fuel consuming, noise and exhaust, and achieve fuel saving and environment protection.

Abstract: A piston for internal combustion engine, compressor or the like, includes a piston ring, a piston skirt having a piston skirt wall. One or more lubricant channels and reservoirs are provided on an outer surface of the piston skirt. Lubricant is conducted to an outer surface of a piston skirt of a piston through the lubricant channels which are communicating an inner surface of the piston skirt with the outer surface thereof. The lubricant is able to be reserved in the lubricant reservoirs provided on the outer surface of the piston skirt to maintain lubrication between the piston skirt and cylinder wall so as to reduce a friction between the cylinder and the piston skirt, reduce loss of power due to friction and heat, improve the output power, reduce the fuel consuming, noise and exhaust, and achieve fuel saving and environment protection.