1. An electrical connector comprising:
an insulative housing comprising a mating portion, the mating portion defining a receiving space surrounded by two longitudinally extended sidewalls, two end walls and a plurality of terminal channels communicating with the receiving space, each sidewall defining a plurality of notches;
a plurality of conductive terminals received in corresponding terminal channels and each having a contact portion; and
a pair of shielding shells having substantially symmetrical structure and respectively attached to the housing, each shielding shell having a flat portion enclosing said sidewall, and the flat portion providing a plurality of latches extending therefrom received in said notches and a plurality of grounding tails in a bottom thereof.
2. The electrical connector as claimed in claim 1, wherein said insulative housing has a tongue plate extending upwardly from a bottom of the mating portion, and said terminal channels are defined in two opposite sides of the tongue plate.
3. The electrical connector as claimed in claim 2, wherein each shielding shell further comprises a pair of wings located at two opposite ends of the flat portion.
4. The electrical connector as claimed in claim 3, further comprising a metallic beam and wherein the metallic beam comprises an elongated base, a plurality of tabs extending from the base, and a plurality of grounding tabs for electrically connecting with the wings of the shielding shell.
5. The electrical connector as claimed in claim 4, wherein said tongue plate defines a plurality of mating holes in a top thereof for receiving tabs of the metallic beam.
6. The electrical connector as claimed in claim 1, wherein each sidewall forms plural pairs of protrusions and each pair of protrusions defines a recess therebetween for receiving said grounding tails.
7. The electrical connector as claimed in claim 1, wherein each end wall provides a pair of guiding posts having a cutout defined therebetween.
8. The electrical connector as claimed in claim 7, wherein each wing of the shielding shell has an engaging finger extending upwardly for being received in said cutout.
9. The electrical connector as claimed in claim 8, wherein each end portion defines a split in an inside thereof and each wing of the shielding shell has a retention leg received in said split.
10. The electrical connector as claimed in claim 1, wherein said terminal channels are defined on an inside surface of the sidewalls.
11. The electrical connector as claimed in claim 10, wherein said sidewall is spaced from said end wall and forms a receiving room therebetween.
12. The electrical connector as claimed in claim 11, wherein said sidewall has a plurality of supporting ribs in a bottom thereof and a plurality of recesses formed between each two supporting ribs for providing insertion of said grounding tail.
13. The electrical connector as claimed in claim 12, wherein the shielding shell has a plurality of bent portions supported by said supporting ribs and the grounding tail is located between adjacent two bent portions.
14. The electrical connector as claimed in claim 13, further comprising a plurality of metal plates and wherein said end wall defines a plurality of grooves for receiving said metal plates.
15. An electrical connector comprising:
an elongated insulative housing extending in a lengthwise direction and comprising a mating face and mounting face opposite to said mating face in an oblique relation therewith, a mating portion located behind the mating face and defining a receiving space therein;
a plurality of conductive terminals disposed in the housing, each of said terminals having a contact portion extending into the receiving space, and a tail portion for surface mounting to a printed circuit board;
at least one shielding shell attached to the housing, the shielding shell having a flat portion enclosing an exterior side of a corresponding sidewall;
at least one protrusion formed on the exterior to retain the shielding shell in position; wherein
said protrusion defines a wedged configuration in a vertical cross-sectional view in a transverse direction perpendicular to said lengthwise direction.
16. The electrical connector assembly as claimed in claim 15, wherein there are two shielding shells attached to two exterior sides of two corresponding side walls, respectively, and there are two protrusions formed on said two exterior sides, of which both define two wedged configurations directing to opposite directions with each other.
17. An electrical connector for mounting to an oblique printed circuit board, comprising:
an elongated insulative housing extending in a lengthwise direction and comprising a mating face and mounting face opposite to said mating face in an oblique relation therewith, a mating portion located behind the mating face and defining a receiving space therein;
a plurality of conductive signal terminals disposed in the housing, each of said terminals having a contact portion extending into the receiving space, and a tail portion for surface mounting to a printed circuit board; and
at least one metallic shielding shell attached to the housing, the shielding shell having a retention tip on a bottom portion thereof; wherein
said retention tip extends oblique relative to the mating face while normal to the mounting face for extending through a corresponding through hole in the oblique printed circuit board on which the mounting face is seated, in a perpendicular relation.
18. The electrical connector as claimed in claim 17, wherein said shielding shell includes a retention leg, of which said retention tip is located at a distal end, and said retention leg extends through a slit in an end of the housing, and wherein the retention leg is normal to the mating face while oblique to the retention tip.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. An integrated process for the production of a dialkyl carbonate and a diol from an alkylene oxide, carbon dioxide and an aliphatic monohydric alcohol comprising:
(a) reacting an alkylene oxide with carbon dioxide in the presence of a chlorine-free carbonation catalyst, wherein the carbonation catalyst is 1,1\u2032(1-butylbenzimidazol-2yl)pentanecopper(II) di(trifluoromethanesulfonate), at a temperature in the range of about 50\xb0 C. to 250\xb0 C. and at a pressure of at least about 1379 kPa (200 psi) to provide a crude cyclic carbonate stream comprising a cyclic carbonate and said catalyst; and
(b) reacting said cyclic carbonate with said aliphatic monohydric alcohol in the presence of said catalyst to provide a crude product stream comprising said dialkyl carbonate and said diol, wherein said crude product stream exhibits a chloride concentration of about 5 ppm or less.