TELEPHONE CONNECTOR WITH BYPASS CAPACITOR

Abstract: A modular jack for telephones in which bypass capacitors (26) have been connected to the leads (14) so as to bypass noise and other high frequency signals. End mounted ceramic capacitors (26) extend from the leads (14) to a ground plane (36) which is provided with flexible fingers (31) and which is connected to a suitable ground (51) so as to provide a grounding contact for the capacitors.

Description: This invention relates to a modular telephone jack including an insulating body member formed with an opening for a mating connector, and a plurality of electrical contacts mounted in said body member. Electrical jacks such as the one described in US-A-4,205,891 are provided with a number of electrical contacts which make mating engagement with a male contact which is received therein. Such a jack does already provide capacitors to a ground plane from all of the various contacts. The construction of these jacks, however, is not applicable to standard modular telephone jacks which are provided with a number of flexible electrical contacts such as descriped in US-A-4,195,900. In these jacks a certain flexibility of the electrical contacts is necessary, and this flexibility causes problems in the mounting of the capacitors. It is an object of the present invention to provide end mounted ceramic capacitors which extend between the contacts and a ground plane of the jack. It is a further object of the present invention to provide a telephone female terminal in which the various contactors of the terminal are provided with an enlarged portion upon which are mounted monolithic surface mounted capacitors which extend to a ground plane which is connected to a ground plane of a printed circuit board or to another suitable grounding region. Metal springs are provided which engage the ends of the capacitors which provide for mechanical cushioning of the capacitors and for alignment. Other objects, features and advantages of the invention will be readily apparent from the following description of certain preferred embodiments thereof taken in conjunction with the accompanying drawings, although variations and modifications may be effected without departing from the spirit and scope of the novel concept of the disclosure and in which: ON THE DRAWINGS FIG. 1 is a front plan view of the novel connector of this invention; FIG. 2 is a sectional view taken on line II-II from FIG. 1; FIG. 3 is a top plane view of the invention with portions removed; FIG. 4 is a cut-away top view of the invention; FIG. 5 is a partial view illustrating the connector prongs and contacts; FIG. 6 illustrates a modification of the invention; FIG. 7 is a sectional view taken on line VII-VII from FIG. 6; FIG. 8 is a top plan view with portions removed; and FIG. 9 is a break-away top view of the invention. FIGS. l-5 illustrate a first embodiment of the invention which comprises a terminal l0 formed with a plastic body member ll in which a jack receiving hole 23 is formed in a front face thereof. The plastic member as shown in the sectional view of FIG. 2 has a bottom member l3 and a top member 2l and a back portion 22. A plurality of electrical contact members l4a through l4f have first portions which extend into the opening 23 so as to make electrical contact with mating terminals on a male plug received in the opening 23 and have top portions l7a which pass over the top 2l of the plastic member ll and are formed with enlarged capacitor contacts l8a through l8f in the top portions l7a through l7f of the contact which are offset relative to each other as illustrated in FIG. 3. The rear portions of the contacts l4a through l4f pass down beyond the rear portion 22 of the plastic member ll and extend through the bottom portion l3 of the plastic member ll and through a printed circuit board 49 which is provided with printed circuit contact area 5l to make electrical contact with the ends l6a through l6f of the contacts l4a through l4f as illustrated in FIGS. l and 2, for example. Mounting prongs 47 and 48 pass through aligned openings in the printed circuit board 49 for mounting the female contact l0 on the board 49. A plurality of end mounted capacitors 26a through 26f extend through an insulating sheet 27 which has a rear portion 28 which is mounted relative to the plastic housing ll such that first ends of the capacitors 26a through 26f engage the electrical contact regions l8a through l8f of the electrical contacts l4a through l4f. A planar member l9 is formed with downwardly bent fingers such as 3l and 32 illustrated in FIGS. 2 and 4 which engage the second ends of the tombstone capacitors 26a through 26f and the member l9 is electrically connected to a conductive cover 36. A downwardly extending portion 20 of cover 36 is mounted between downwardly extending portion 28 of the insulating member 27 and the rear 38 of the electrical conducting cover member 36. The member l9 may be soldered to the cover member 36 by providing solder through holes 37 formed in the planar member l9 as illustrated in FIG. 4. The cover member 36 is formed with sides 39 and 4l and grounding tabs 42 and 43 which extend from the cover member 36 through openings formed in the printed circuit board 49 and make electrical contact with grounding regions on the printed circuit 5l so as to ground the upper ends of the capacitors 26a through 26f through the fingers 3l and 32, the finger member l9 and the cover member 36. In use, the terminal l0 is mounted on a printed circuit board 49 with contacts l6a through l6f which extend through board 49 electrically connected to different terminals on the printed circuit paths 5l. The other ends of the capacitors 26a through 26f are grounded through the grounding tabs 42 and 43 which are connected to the side walls 39 and 4l of the electrically conducting cover member 36. The male member of the connector is inserted into the opening 23 to make electrical connection between the terminals l4a through l4f and such contacts are grounded through capacitors 26a through 26f. As illustrated in FIG. 5, the cover member side walls 39 and 4l are provided with tabs 46 which are deflected into mating opening formed in the plastic member ll to firmly attach the cover member 36 to the plastic body member ll. FIGS. 6-9 illustrate a second embodiment of the invention wherein grounding is made to a front grounding plate rather than to the printed circuit board 49. FIGS. 6-9 illustrate a modification of the invention wherein the grounding arrangement has been changed. This merely requires the modification of the cover member and the plastic body member. In this embodiment, the cover member l36 has a front portion l52 which is connected to a conductive planar member l5l by solder l53. The plastic member lll has a front rim l54 behind which the electrical conductive planar member l5l fits as shown in FIGS. 7, 8 and 9. The terminals l4a through l4f, the insulating plate 27, the capacitors 26 have the same configuration as that of the first embodiment. The cover member l36 is modified so as to eliminate the extension tabs 42 and 43 which are used for grounding in the embodiment illustrated in FIGS. l-5 and grounding occurs through the plate l5l which is connected by the solder l53 to cover member l36. This embodiment allows mounting and grounding to conductive back panel. Although the invention has been shown with six electrical terminals, it is to be realized that it may be modified to any desired number such as 8 or l0, for example. Item l2 of FIG. 3 (flangeless) could be modified as item l54 of FIG. 8 (flanged) with or without l5l conductive mounting member.

Claims: A modular telephone jack including an insulating body member (11) formed with an opening for a mating connector, a plurality of electrical contacts (14a-f) mounted in said body member (11), characterized by a plurality of surface mounted tombstone capacitors (26a-f) with first ends in contact, respectively, with electrical contact regions (18a-f) of the plurality of electrical contacts (14a-f); an electrically conducting planar member (19) mounted to said body member (11) and formed with a plurality of flexible fingers (31, 32), respectively, engaging the second ends of the plurality of tombstone capacitors (26a-f); and means, comprising a cover member (36), sides (39, 41) and grounding tabs (42,43) for grounding said electrically conducting planar member (19). A telephone jack according to claim 1 wherein said plurality of tombstone capacitors (26a-f) are mounted so that their longitudinal axes extend parallel to each other. A telephone jack according to claim 2 wherein said electrically conducting planar member (19) is soldered to said electrically conducting cover member (36). A telephone jack according to claim 2 including an electrically insulating member (27) formed with a plurality of holes in which said plurality of tombstone capacitors (26a-f) are respectively mounted and said insulating member (27) mounted between said cover member (36) and said plurality of elctrical contacts (18a-f). A telephone jack according to claim 4 including a printed circuit board (49) formed with at least one mounting opening, and said body member (11) formed with at least one mounting prong (47) which is receivable through said mounting opening to attach said telephone jack to said printed circuit board (49) and said plurality of electrical contacts (16a-f) to circuit paths on said printed circuit board (49). A telephone jack according to claim 2, wherein said plurality of electrical contacts (14a-f) are formed with enlarged regions (18a-f) and said first ends of said plurality of tombstone capacitors (26a-f), respectively, engaging said enlarged regions (18a-f). A telephone jack according to claim 5 including a conductive grounding area formed on said printed circuit board (49) and at least one electrically conducting tab (42) extending between said conductive grounding area and said electrically conducting cover member (36).

Inventors: TALEND, DONALD RICHARD
Applicants: CORCOM, INC.
Application year: 1987
Main classification: H01R13
IPC codes: H01R13