Coaxial cable fitting

• US 3,970,355 A
• Filed: 05/10/1974
• Issued: 07/20/1976
• Est. Priority Date: 05/15/1973
• Status: Expired due to Term

• Current Assignee: Spinner GmbH Elektrtechnische Fabrik
• Original Assignee: Spinner GmbH Elektrtechnische Fabrik
• Inventors: Pitschi, Franz
• Primary Examiner(s): McGlynn, Joseph H.
• Application Number:
  US05/468,921
• Time in Patent Office: 802 Days
• Field of Search: 339/103, 339/177, 339/273
• US Class Current: 439/578
• CPC Class Codes: H01R 2103/00 Two poles
• CPC Class Codes: H01R 24/40 specially adapted for high frequency

Abstract

An outer sleeve with connector socket are slipped onto the bared end of a coaxial cable whereby a clamping sleeve with axial slot and conical head is spread radially. The clamping sleeve is resiliently biased so that its head engages a tapered control surface in the outer sleeve tending to clamp the clamping sleeve against the cable end. Frictional engagement of the cable end reinforces that clamping action. The head may either grip the bared outer conductor or an insulation jacket on the cable. The rear portion of the clamping sleeve makes electric contact with the outer conductor of the cable and has contact fingers for making sliding connection with the socket.

Claims

1. Hf cable fitting for connection to the end of a coaxial cable;

a sleeve member for slipping onto and over the end of a cable in axial direction and including an internal control surface;

clamping means disposed in the sleeve member for axial movement therein and cooperating with said control surface to contract radially inwardly as a radially inwardly acting clamp when in axial forward positions, while permitting radial outward spreading when moved from the forward positions in a particular axial direction colinear with the axial direction of insertion of a cable in the sleeve;

resilient means acting axially on the clamping means and causing the clamping means to assume one of said forward positions;

the clamping means constructed for engagement with the periphery of an axially inserted cable thereby causing the clamping means to be moved from the forward positions against the bias of the resilient means, upon cessation of the insertion of the cable the resilient means moving the clamping means back into one of the forward positions and holding it in one of the forward positions, whereby engagement of the clamping means with said control surface provides for the radially inwardly directed clamping action against and of the insert cable, the resilient means providing clamping force for obtaining said clamping action; and

connecting means in the sleeve member to make contact with an exposed peripheral portion of said cable.

2. Fitting as in claim 1, wherein the inserted cable engages the clamping means frictionally for moving it in the said axial direction.

3. Fitting as in claim 1, wherein the clamping means is an axially biased, axially slotted sleeve having a conical head, the control surface being defined by a taper surface in the sleeve member acting on the head for azimuthally spreading or contracting the slotted sleeve depending on the disposition of the head in the sleeve member, the slotted sleeve frictionally engaging at least a portion of the cable end.

4. Fitting as in claim 3, wherein only the head end portion of the slotted sleeve has internal means for engaging the cable in a surface deforming manner, the cable having an insulation jacket, stripped only to the extent of contact making of the slotted sleeve at the end thereof opposite the head end.

5. Fitting as in claim 3, wherein the connecting means includes a socket in the sleeve member at one end thereof, and contacts extending from the slotted sleeve and engaging the socket.

6. HF cable fitting for connection to the end of a coaxial cable having inner and outer conductors, the outer conductor being exposed at the end of the cable, comprising:

an outer sleeve for slipping onto and over the end of the cable and having a tapered surface on the inside;

connecting means in the outer sleeve for making electrical connection with the outer conductor of the cable when inserted;

an axially slotted clamping sleeve axially movably disposed in said outer sleeve and constructed for axial displacement upon insertion of a cable without requiring turning, said clamping sleeve having a conical head interacting with the tapered surface for widening or narrowing the slot or slots of the clamping sleeve;

a spring in the outer sleeve and held on one side in relation to said outer sleeve, while acting with the other side on the clamping sleeve for biasing the clamping sleeve in an axial direction, opposite an axial direction of insertion of the cable into the outer sleeve and into the clamping sleeve, thereby causing the clamping sleeve to exert radially inwardly directed clamping pressure for action on the circumference of the inserted cable; and

the slot or slots of the clamping sleeve providing for radial expansion upon insertion of the cable and upon axial displacement of the clamping sleeve in the direction of insertion and against the bias of the spring, so that the insertion is not impeded by clamping pressure, the spring causing the clamping sleeve to provide the said clamping pressure upon cessation of insertion.

7. Fitting as in claim 6, wherein the conical head has a shoulder, the spring being a coil spring on the sleeve acting on the shoulder.

8. Fitting as in claim 6, wherein the head end of the clamping sleeve where facing the cable when inserted has a flared contour so that the cable end can radially spread the slotted sleeve.

9. Fitting as in claim 6 including means for impeding turning of the clamping sleeve in the outer sleeve.

10. Fitting as in claim 6, wherein the interior of the front end of the clamping sleeve is provided with serrations for engagement with an insulation cover of the inserted cable.

11. Fitting as in claim 6, wherein the outer sleeve has at least one internal groove, a sealing O-ring in said groove for sealing engagement with the inserted cable.

12. Fitting as in claim 6, wherein the clamping sleeve is provided with contact elements extending from one end of the clamping sleeve, the connecting means being a socket member in the sleeve member, the socket member engaging the contact elements.

13. Fitting as in claim 12, wherein the contact elements are fingers extending from the sleeve.

14. Fitting as in claim 12, wherein th socket member has a cylindrical surface for sliding engagement with the contact elements permitting relative movement between the elements and the surface.

15. Fitting as in claim 12, wherein the socket member is provided with an insulative annulus, the inner conductor or the inserted cable projecting through said annulus.

16. Fitting as in claim 12, wherein the clamping sleeve is provided on its interior surface with surface-roughness for increasing friction with the inserted cable.

17. Fitting for connection to the end of a coaxial cable having an inner and an outer conductor, to be positioned thereon and for making contact with the outer conductor, comprising:

a first sleeve for insertion of the end of the cable and having an internal control surface;

an axially slotted, second sleeve, axially displaceably retained in said first sleeve and having a control surface for engagement with the control surface of the first sleeve so as to determine radial dimensions of the second slotted sleeve in dependence upon relative axial disposition of the second slotted sleeve in the first sleeve;

resilient means biasing the second slotted sleeve in a first axial direction, opposite to a direction of insertion of the cable into the first sleeve tending to reduce the radial dimensions of the second slotted means by operation of engagement between the control surfaces;

the cable when inserted engaging the second slotted sleeve and tending to displace and displacing the second slotted sleeve axially on account of its axial displaceability opposite to the first direction and against the bias by the resilient means, so that the radial dimensions of the second slotted sleeve are increased, upon completion of insertion the resilient means biasing the second slotted sleeve, so that the engaging control surfaces tend to reduce the radial dimensions of the second slotted sleeve; and

means included in the second slotted sleeve and provided for frictional engagement with the inserted cable and holding the cable by operation of the resilient means as biasing the second slotted sleeve.

18. Fitting as in claim 17, the slotted sleeve having a conical head constituting the control surface thereof, the first sleeve having a corresponding conical control surface.

19. Fitting as in claim 17, the resilient means being a coil spring acting on the first sleeve.

20. Fitting as in claim 17, second sleeve provided with contact elements, the first sleeve having a contact socket said socket engaging the contact elements, the inner conductor of the inserted cable being guided through the contact socket in insulated relation thereto.