Electrical connectors – Contact comprising cutter – Insulation cutter
Patent
1988-03-09
1989-02-21
McGlynn, J. H.
Electrical connectors
Contact comprising cutter
Insulation cutter
H01R 424
Patent
active
048061212
DESCRIPTION:
BRIEF SUMMARY
PROCESS
The present invention generally concerns junctions and particularly concerns contact socket elements, strips comprising such elements juxtaposed thereon, and the manufacturing process of such a strip.
Contact elements, both male and female, or plug and socket, are already known formed from blanks cut from sheets of metal. The elements are often formed by rolling or bending following cutting and they are often presented placed side by side, along a carrier strip which supports them and which usually comprises handling openings.
Because of the growing tendency toward miniaturzation, the surface areas of the contacts of connectors have had to be, over some time, of progressively smaller size. A surface area now presently being used is 2.54 mm. Present cutting and bending techniques of metal sheets do not allow the formation of juxtaposed contacts with a sufficient amount of material for establishment of a secure connection. Consequently, the contact elements of connectors with corresponding surface areas which are as small as desired at the present time are either formed in a part of a strip of greater width than the surface area, or formed from several strips together.
The invention concerns contacts which can be formed entirely with the metal contained in the piece of metal strip corresponding to the surface area of the connectors. More precisely, all of the parts of a contact socket element are realized from a piece of strip of which the width is equal to the surface area of the contacts of the connectors.
The invention thus concerns not only the contact socket elements but also the unbroken strips comprising the socket elements placed side by side on and supported by a carrier strip advantageously comprising handling openings. The invention also concerns a process for the manufacture of such a strip.
More precisely, the invention concerns a contact socket element of one single piece for a connector, of the type which comprises a plugging part and a junction part, both of them formed from one metal sheet; the plugging part comprises two flexible cheeks placed facing each other and demarcating a lodging for a male contact element, the plug, with the inside surfaces of the cheeks being intended to be in contact with a plug contact element, an external guard flange placed at the end of the plugging part which is opposite the junction part and integral with the two cheeks of one side of the lodging demarcated by the two cheeks, an internal guard flange placed at the other end of the plugging part which is near the junction part and integral with the two cheeks on the same side of the lodging as the external guard flange, and a small flexible tongue having one end integral with the external guard flange and one free end extending toward the internal guard flange, the small tongue being at some distance from said lodging from its end integral with the external guard flange toward its free end.
It is advantageous that the cheeks be curved convexly toward the lodging of the plug element. In one advantageous embodiment, the junction part is flat and comprises at least one carved out spot of rectangular shape, the carved flaps forming two teeth at facing edges of the carved out spot and defined by complementary edges, each tooth being arranged transverse to the junction part. It is advantageous that the junction part comprise two carved out spots. These preferably have complementary shapes in a V formation, so that one of the teeth has one point and the other has two points.
The invention also concerns a strip of contact socket elements of the aforementioned type, formed of one single piece of a metal sheet; the strip comprises a carrier strip having handling openings, the external guard flange of the socket contact elements being integral with the carrier strip, the total of the widths of the external guard flange and the cheeks, at the point where they are integral with the external guard flange, being equal to the surface area of the contact socket elements along the carrier strip.
It is also advantageou
REFERENCES:
patent: 3047832 (1962-07-01), Deakin
patent: 3806859 (1971-01-01), Madarasz et al.
patent: 4106836 (1978-08-01), Asick et al.
patent: 4211466 (1980-07-01), Reynolds
patent: 4263474 (1981-04-01), Tennant
McGlynn J. H.
N.E.D. Nicomatic Electronic Department
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