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Publication numberUS3408610 A
Publication typeGrant
Publication dateOct 29, 1968
Filing dateApr 10, 1967
Priority dateApr 10, 1967
Publication numberUS 3408610 A, US 3408610A, US-A-3408610, US3408610 A, US3408610A
InventorsClarkson Anthony T
Original AssigneeAnthony T. Clarkson
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Rotatable coaxial coupling
US 3408610 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)


ANTHONY T. CLARKSON BY ermag & 1610a:

United States Patent 3,408,610 ROTATABLE COAXIAL COUPLING Anthony T. Clarkson, 5655 N. Maria Drive,

ucson, Ariz. 85704 Filed Apr. 10, 1967, Ser. No. 629,723 6 Claims. (Cl. 339-8) a free running hearing within the coupling parts themselves.

Background of the invention The present invention relates to electrical connectors and specifically to a rotatable coupling for coaxial cables.

excessive. Summary" of the invention In the coupling described herein the center contact is maintained in abutting, free turning relation Without the use of an actual spring, while the shield or ground connection is made by a wiper element having a plurality of resilient fingers of different, non-harmonic lengths.

Brief description of the drawing FIGURE 1 is a side elevation view of the coupling in a typical use;

FIGURE 2 is an enlarged sectional view taken on line 22 of FIGURE 1; and

FIGURE 3 is a perspective view of the multiple finger wiper element.

Similar characters of reference indicate similar or identical elements and portions throughout the specification and throughout the views of the drawing.

Description of the preferred embodiment The coupling comprises an elongated, generally cylin- 3,408,610 Patented Oct, 29, 1968 securely against angular shifting and eliminates the need for a second bearing, while also holding proper axial relation so that proper contact Within sleeve 12 is an insulated plug 32 held conductive post 36, the outer end of which has a connecting pin 38 disposed within a tion and degrade the signal.

Barrel 10 has a reduced size bore 44 extending axially of sleeve 12. To minimize friction and 64 may have an outwardly projecting dimple 68 adjacent the tip thereof to make the actual concontact wall 66 wear each finger tact. All of the fingers 64 are of dilferent lengths and, considering the fingers as reeds, are of nonharmonic resonant frequencies, so that vibration of one finger will not cause vibration of any other. This arrangement also spreads the contact axially over wall 66 and further reduces wear. The outer end of cylindrical portion 62 has a protruding locking lug 70 which seats in a correspondingly shaped notch 72 in plug 46 and holds the wiper element against rotation.

Coaxial connectors of various types are in common use and the coupling is readily adaptable to any type. As illustrated, the outer end of barrel has a flange 74 to hold a flanged connector 76 and the outer end of sleeve 12 has a similar flange 78 to hold a flanged connector 80.

In normal use the barrel 10 will be attached to a convenient support While the sleeve 12 is allowed to rotate as necessary. A typical arrangement, shown in FIGURE 1, uses a bracket 82 through which barrel 10 fits, the barrel being secured to the bracket by nuts 84 on threaded portion 20. The actual mounting will depend on the particular use.

It is most unlikely that the rotational speed of the coupling will be high enough to cause resonance, the usual causes being outside sources, such as associated electrical apparatus, or electromagnetic fields in the coaxial line. Any tendency of any one finger 64 to vibrate will be damped out in the unitary wiper element and no undesirable electrical noise will be introduced into the coaxial line. Since no spring is used in the coupling there is no problem of inductance from the effect of a coil in the electrical field. Further, there is no alternating or layered structure of conductive and insulative material which could cause undesirable capacitance in the coupling. The very simple structure makes the coupling economical to manufacture and easy to service, all parts subject to wear being easily replaceable.

It is understood that minor variation from the form of the invention disclosed herein may be made without departure from the spirit and scope of the invention, and that the specification and drawing are to be considered as merely illustrative rather than limiting.

I claim:

1. A rotatable coaxial coupling comprising:

a barrel element having means for connection to a coaxial cable;

a sleeve axially rotatably mounted in said barrel and having means for connection to a coaxial cable:

,- sgosp o a wiper element electrically connecting said barrel to saidsleeve, said wiper element having a plurality of resilient fingers frictionally engaging said sleeve and said fingers being of different lengths.

2. The structure of claim 1, wherein said fingers are resonantly non-harmonic with respect to each other.

3. The structure of claim 1, wherein said barrel and said sleeve are conductive; a

a conductive post axially mounted in said sleeve and insulated therefrom;

a conductive center pin axially mounted in said barrel and insulated therefrom;

and pressure means biasing said center pin into abutting contact with said post. 1 v t 4. The structure of claim 3 and including an insulated plug in said sleeve in which said post is fixed;

21 second insulated plug in said barrel in which said center pin is axially slidable, said center pin having an enlarged portion between said second plug and the post contacting end thereof;

and said pressure means comprising a resilient ring compressed between said second plug and said enlarged portion.

5. The structure of claim 4, wherein said wiper element has a cylindrical portion fitting tightly in said barrel, said fingers being integral with and extending axially from said cylindrical portion;

said sleeve having an internal contact face, concentric with said post, on which said fingers are frictionally engaged.

6. The structure of claim 1, wherein said sleeve is mounted in one end of said barrel, said sleeve having an annular bearing channel coincident with said one end of the barrel;

a collar adjustably mounted on said barrel and having an inwardly thickened flange closely concentric with said sleeve adjacent said one end of the barrel;

the confronting portions of said flange and said one end being oppositely bevelled and forming, with said bearing channel, a raceway;

and a plurality of ball hearings in said raceway.

References Cited UNITED STATES PATENTS 5/1938 Kus 3/1964 Cook

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2119168 *Jul 16, 1935May 31, 1938Kus Walter CElectrically heated curling iron
US3124406 *Sep 20, 1962Mar 10, 1964 Coaxial connector
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3544949 *Oct 12, 1967Dec 1, 1970Kupits Arnold KarlovichSlip ring device
US3847463 *Apr 11, 1973Nov 12, 1974Gilbert Engineering CoCable connector apparatus
US3869187 *Mar 12, 1974Mar 4, 1975Sealectro CorpQuick connect/disconnect coax connector
US3936116 *Jun 12, 1974Feb 3, 1976Georg SpinnerCoaxial HF multiple rotary connection
US4022518 *Jun 4, 1976May 10, 1977Yvon GattazElectrical rotary coaxial connector
US4336974 *Feb 13, 1980Jun 29, 1982Microwave Development Labs. Inc.Coaxial rotary joint
US4488139 *May 5, 1982Dec 11, 1984The United States Of America As Represented By The Secretary Of The NavyElectrical connector
US4531805 *Apr 3, 1984Jul 30, 1985Allied CorporationElectrical connector assembly having means for EMI shielding
US4583809 *Apr 2, 1984Apr 22, 1986Allied CorporationElectrical connector assembly having means for EMI shielding
US4664467 *Feb 13, 1985May 12, 1987Minnesota Mining And Manufacturing CompanyCoaxial cable terminator
US4741702 *Aug 31, 1987May 3, 1988Junkosha Co., Ltd.Phase-adjustable coaxial cable connector
US4808128 *Apr 2, 1984Feb 28, 1989Amphenol CorporationElectrical connector assembly having means for EMI shielding
US4897046 *Oct 3, 1986Jan 30, 1990Minnesota Mining And Manufacturing CompanyShielded connector system for coaxial cables
US4964814 *Apr 24, 1989Oct 23, 1990Minnesota Mining And Manufacturing Co.Shielded and grounded connector system for coaxial cables
US7727021 *Apr 9, 2009Jun 1, 2010Omron CorporationConnector having a plug, a socket, and a tubular shield member with an elastic arm
US7854615Apr 30, 2010Dec 21, 2010Lincoln Global, Inc.Rotational connector for welding torch
US20090269981 *Apr 9, 2009Oct 29, 2009Omron CorporationConnector
US20150263419 *Mar 14, 2014Sep 17, 2015Motorola Solutions, Inc.Apparatus and method for integrating a reduced-sized antenna with an accessory connector
EP0163744A1 *Nov 16, 1984Dec 11, 1985Matsushita Electric Industrial Co., Ltd.Apparatus for rotatably supporting temperature probe
EP0163744A4 *Nov 16, 1984Jun 5, 1986Matsushita Electric Ind Co LtdApparatus for rotatably supporting temperature probe.
EP0768738A1 *Oct 7, 1996Apr 16, 1997Aulebach, HennerRotary member for coaxial connections
EP2765660A1 *Feb 7, 2013Aug 13, 2014ABB Technology AGSlip ring arrangement
WO2014122164A1 *Feb 5, 2014Aug 14, 2014Abb Technology AgSlip ring arrangement
U.S. Classification439/18
International ClassificationH01R39/00, H01R39/64
Cooperative ClassificationH01R39/64
European ClassificationH01R39/64