Abstract: A fastener is adapted for assembling a first housing to a second housing. The first housing is provided with a protruding portion and a buckling portion, and the second housing has a first surface, a second surface, and a through hole. The fastener includes a first portion, at least one connecting portion, at least two elastic portions, and a second portion. The first portion movably abuts against the first surface and has a first opening. The connecting portion is accommodated in the through hole. One end of the connecting portion is connected to the first portion. The connecting portion is spaced apart from an inner edge of the second housing by a gap. The two elastic portions inclinedly extend into the first opening. The second portion movably abuts against the second surface and is disposed at the another end of the connecting portion.

Abstract: A keypad assembly, comprising: a main body made of metal, the main body defining a plurality of slots and the slots enclosing a plurality of pressing buttons thereon, each pressing button defining at least one symbol slot, the main body having a contact surface and a operating surface; and a light-transmissive filling member, the filling member defining a plurality of protruding strips and the protruding strips enclosing a plurality of button areas thereon, each button area having at least one symbol block protruding therefrom, the filling member bonding to the contact surface with the protruding strips and the symbol blocks respectively engaging in the corresponding slots and the symbol slots. A method for making the present keypad assembly is also described.

Abstract: A keypad assembly, comprising: a main body made of metal, the main body defining a plurality of slots and the slots enclosing a plurality of pressing buttons thereon, each pressing button defining at least one symbol slot, the main body having a contact surface and a operating surface; and a light-transmissive filling member, the filling member defining a plurality of protruding strips and the protruding strips enclosing a plurality of button areas thereon, each button area having at least one symbol block protruding therefrom, the filling member bonding to the contact surface with the protruding strips and the symbol blocks respectively engaging in the corresponding slots and the symbol slots. A method for making the present keypad assembly is also described.

Abstract: The present invention discloses a clock switching circuit, which comprises: a clock generator, receiving two different clock signals; a logic gate, coupled to an enable-signal generator and an output-clock generator, wherein during clock switching, the logic gate turns off output clock according to the signal edges of those two clock signals to avoid the problems of clock glitch and timing insufficiency, and the logic gate will not restore clock output until an appropriate timing occurs.

Abstract: The present invention discloses a clock switching circuit, which comprises: a clock generator, receiving two different clock signals; a logic gate, coupled to an enable-signal generator and an output-clock generator, wherein during clock switching, the logic gate turns off output clock according to the signal edges of those two clock signals to avoid the problems of clock glitch and timing insufficiency, and the logic gate will not restore clock output until an appropriate timing occurs.

Abstract: A dispenser contains a chamber enclosed by an upper wall and a lower wall, both walls are oriented parallel to each other. The upper wall has a vertically bored inlet port and the lower wall has a plurality of vertically bored outlet ports for providing access to the chamber. The outlet ports are geometrically arranged in an array pattern characterized by equidistantly spaced rows and columns of bores. There is a plurality of baffle plates interposed between the upper wall and the lower wall. The baffle plates, which are spatially separated from each other, are oriented parallel to and spatially separated from the upper and lower walls. The baffle plates have a plurality of vertically bored holes for providing access between the inlet port and the outlet ports, whereby the dispenser is effective in providing homogeneous flow of fluid through the outlet ports.

Abstract: A dispenser contains a chamber enclosed by an upper wall and a lower wall, both walls are oriented parallel to each other. The upper wall has a vertically bored inlet port and the lower wall has a plurality of vertically bored outlet ports for providing access to the chamber. The outlet ports are geometrically arranged in an array pattern characterized by equidistantly spaced rows and columns of bores. There is a plurality of baffle plates interposed between the upper wall and the lower wall. The baffle plates, which are spatially separated from each other, are oriented parallel to and spatially separated from the upper and lower walls. The baffle plates have a plurality of vertically bored holes for providing access between the inlet port and the outlet ports, whereby the dispenser is effective in providing homogeneous flow of fluid through the outlet ports.