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Publication numberUS2163412 A
Publication typeGrant
Publication dateJun 20, 1939
Filing dateJul 8, 1936
Priority dateAug 2, 1935
Publication numberUS 2163412 A, US 2163412A, US-A-2163412, US2163412 A, US2163412A
InventorsSchneider Oskar
Original AssigneeSiemens Ag
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Shielded connector device
US 2163412 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

June 20, 1939. Q SCHNQDER 2,163,412


UNITED STATES PATENT OFFICE Application July 8, 193a, Serial No. 89,810

In Germany Amst 2,, 1935 2 Claims. (Cl. 173-330 In the installation oiradio lines or conductors, special care must be taken so that they will not become subject to extraneous disturbing electrical fields. For this reason so-called shielded 5 leads or lines have been adopted in practive In such shielded connections of the kind in question, more particularly in broadcast installations for the antenna feeder or downlead-{it is necessary that the sliielding,-means all the way fromthe pick-up conductor, that is to say, the receiving aerial to the receiver proper should not present any break. Inasmuch as the use of such shielded lines or downleads has of late become popular also for installations in rooms or under similar conditions, the latter had to be adapted to the power or fighting circuits that are usually present. The radio lead, that is to say, more particularly the antenna lead, is then installed most preferably in a fixed or stationary manner and is th brought to a socket, whence connection is est blished with the receiving 'set proper by way and means of a flexible cable fitted with a.v

connector plug.

Now, if such a socket and plug connector device is to preclude all risks of the line being throughout safeguarded from actions of extraneous disturbing fields, then a. galvanic or conducting connection must be providedbetween the shielding means of the fixed line andthe fiexible cable and socket connection. In otherwords, the problem arises to provide a plug and socket connection which will assure galvanic or conducting union between the two shielding means, while in addition the lead for the radio frequency energy at this point will be protected from disturbing in- The present invention discloses a shielded plug connection which establishes a. metallic junction between the shielding means of the lead and the shielding means of the cable and plug, such that the entire line or downlead will be throughout surrounded and safeguarded by a shield.

The plug is so designed that a bipartiteshell or casing made of metal insures. the desired connection between the shields. The plug shell properly so-called consists preferably of an insulation material capable of being sprayed; internally, it is provided with a metallized coat applied by spraying methodsknown in the prior art, so as to provide a shield. This top part is closed by a metallic base plate or a plate bearing a metallized layer to which the plug contact is fastened. The RF lead is in the form of a concentric or co-axial central conductor whose shield should be connected with the case.- This connec-v tion between the shield of the lead and the shell or envelope of the plugis insured by the pressing on of the metallic base plate. Satisfactory union between the shield and the socket is insured .preferably by a cylindrical appendage piece which is 5- introduced into a matching bush 0! the socket. 1

Locking by spring cam pieces in the socket and a suitable part in the shell contact of the plug prevent inadvertent loosening of the contact when the cable is touched and moved, say in dusting 10 or cleaning.

Inasmuch as such a shielded fiexible cable is very liable to-change its capacity values when subject to fiexure, etc., the shield is made 0! a comparatively large diameter so that it is not 15 particularly suited for, sharp bends and flexing.

However, because of the fact that it is often necessary in practice to bring the flexible cable away-.from the socket at right angles, it'will be seen that the standard type oi socket con- 20 struction is frequently unsuited. Hence, the

. present invention discloses a plug whose prong is disposed angularly in reference to the cable that is led away so that, upon the plug being inserted, the flexible cable may, for instance, be led 25 in downward direction without incidental flexing thereof, in fact, it will then be subject only to tractive efi'orts.

For a better understanding 0! the invention, reference is made to the accompanying drawing, 30 in which;

Fig. l is a perspective view of a plug connection embodying the invention,

Fig. 2a is a sectional view and Fig. 2b a rear view of the device of Fig. 1 and, 35 Fig. 3 is a side view of the plug as inserted in a wall socket.

As shown, a hollow plug member I has an opening at its rear side in which is seated a base or mounting plate 2, these members being formed 40 of any suitable insulation materials As shown the main plug member is coated on'both its inner and outer surfaces with a metallic coating Ill. The central conductor H of the cable which is to be connected to the radio device such as are- 45 ceiver, is enclosed in a metallic shield 5, both these members entering the plug through an aperture I2 formed in one end thereof, As shown the cable I I is secured to the end of the plug connector or prong 4 as by means of the nuts I3, the 50 lower nut also serving to secure connector 4 rigidly to the plate 2. Attaching screws 3 pass into the main body of the plug and secure plate 2 in position and also an overlying metallic plate l4 which has an end I turned under the lower 55 ring 6 is provided which surrounds the prong 4 but is insulated therefrom. Contact ring 6 engages the sides of an opening 16 in the socket or casing I thereby providing a conductive connection between the latter and shield 5. When in position, the end of plug 4 may enter a bushing or sleeve I! by inward or outward pressure application to ensure satisfactory connection with the shielded antenna lead l8 which may. enter the casing from the rear. The plug device described cannot be mistaken or used for a power or lighting circuit plug so that damages and injuries to the receiver are'prevented.

Having'described my invention, what I claim as novel and desire to secure by Letters Patent is:

- 1. A connector device for connecting the conductor of -a shielded'transmission cable to electrical apparatus comprising a cup-shaped casing of insulation material, means for shielding said casing comprising a coating of a metallic substance on at least one of the surfaces of the casing, a closure for said casing comprising a metallic plate mounted within the casing, a plug mounted on said plate but insulated therefrom whereby the plug is insulated from the coating on said casing, means within said casing for receiving the shielded cable and connecting the inner conductor thereof to the plug, 'a metallic contact cylindrical member secured to said metallic plate and surrounding but insulated from said plug, and a conductive connection within said casing between the shielding means of'the cable and the coating of metallic substance .to' provide continuity between the cable surrounding meansand the metallic coating. Y

2. A connector device for joining a conductor in one shielded cable to a conductor in another shielded cableand at the same time provide a shielded joint and conductive connections between the shielding means of the two cables and the shielding means of the joint comprising a plug connected to the end of the first named conductor which is to be joined to the other conductor, a cooperative plug receptacle connected to the end of said other conductor that is to be joined to the first named conductor, a. cup-shaped casing for said plug composed of insulating material, acoating of metallic shielding material on said casing, means for securing said plug to said casing comprising a metallic cover member for the cup-shaped casing, said plug being insulated from said cover member and means supported by said cover member in cooperation with said cupshaped casing providing a conductive connection between the shield of the first cable and the metallic layer on the casing, a cylindrical member supported on said cover member and electrically connected thereto, said cylindrical member being positioned so as to surround but not contact said plug, said receptacle including means for contacting said cylindrical member when the plug is inserted in the receptacle for providing a conductive connection between the cylindrical member and the shield of said second conductor.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2448378 *Mar 28, 1946Aug 31, 1948Gen ElectricGrid-to-cathode capacitor construction
US2450271 *Mar 7, 1945Sep 28, 1948Edison Inc Thomas AElectrical connector
US2470320 *Jan 13, 1945May 17, 1949Page Herbert EElectrical connection device
US2632788 *Aug 16, 1951Mar 24, 1953Continental Copper & Steel IndRocket connector assembly
US3141718 *Jan 3, 1962Jul 21, 1964Te Ind IncSolderless right angle plug connector
US3229241 *Dec 16, 1963Jan 11, 1966IttElectrical connectors for coaxial cable
US3337833 *Sep 4, 1964Aug 22, 1967Elco CorpModular electrical ground bushing
US3587035 *Sep 10, 1969Jun 22, 1971Gen ElectricGas shield for loadbreak cable termination
US3912354 *Mar 4, 1974Oct 14, 1975Minnesota Mining & MfgGround connector for shielded cable
US3914529 *Jul 10, 1974Oct 21, 1975Holloway Norman CInsulative terminal cap
US4059326 *Mar 1, 1976Nov 22, 1977General Electric CompanyDry-type instrument transformer with potential tap and connector therefor
US4120553 *Oct 6, 1977Oct 17, 1978Siemens AktiengesellschaftPlug housing for multipolar plug connectors
US5037332 *Aug 7, 1990Aug 6, 1991Itt CorporationIntermodule electrical coupling
US5178549 *Jun 27, 1991Jan 12, 1993Cray Research, Inc.Shielded connector block
US5183412 *Mar 16, 1992Feb 2, 1993Nec CorporationConnector for coaxial cable
US5211567 *Jul 2, 1991May 18, 1993Cray Research, Inc.Metallized connector block
US5224918 *Oct 20, 1992Jul 6, 1993Cray Research, Inc.Method of manufacturing metal connector blocks
US5400504 *May 17, 1993Mar 28, 1995Cray Research, Inc.Method of manufacturing metallized connector block
US6325672Oct 16, 1999Dec 4, 2001Berg Technology, Inc.Electrical connector with internal shield and filter
US6390851Oct 16, 1999May 21, 2002Berg Technology, Inc.Electrical connector with internal shield
USRE28604 *Mar 5, 1975Nov 4, 1975 Gas shield for load-break cable terminations
U.S. Classification439/582, 439/931, 174/102.00C, 174/359, 439/886
International ClassificationH01R13/658
Cooperative ClassificationY10S439/931, H01R13/658
European ClassificationH01R13/658