1934-06-14

Abstract of GB411627 411,627. Fitting sockets &c. to cable ends. DAVIES, F. P., and BOWDEN (ENGINEERS), Ltd., Victoria Road, Willesden Junction, London. March 20, 1933, No. 8398. [Class 83 (ii).] The end of a wire cable, preparatory to its insertion into a sheath, socket, collar &c., is cut off by a cutting-off or abrasive wheel, or by a friction saw, so as to leave the ends of the wires substantially without burrs. The cable 3 is held by two clamps 1 spaced apart a short distance and situated one on each side of the abrasive wheel 4. The clamps are closed on to the cable by screws 12 against the action of springs 9 and are mounted by hook-like connections 10 on a carrier 6 pivoted to the machine table 7 and movable to and from the wheel 4 by a lever 8 ; pins 11 prevent lateral movement of the clamps. The cable is removed with the clamp thereon, and the fitting is placed over the cable end with the strands gripped by the clamp. When the cable is required to be passed through a tubular outer mechanism, before the fitting is attached, a removable thin cap is placed on the cable end. Specification 405,784 is referred to.

0

1934-06-14

D07B9/00 ; D07B9/00

D07B9/00

GB19330008398 19330320

GB19330008398 19330320

1	Improvements in and relating to the fitting of the ends of wire rope or wire cable with sheaths, sleeves, sockets, collars, or the like
	Inventor:	Applicant: FRANK PRESTON DAVIES; BOWDEN ENG LTD
	EC:D07B9/00	IPC: D07B9/00;D07B9/00
	Publication info: GB411627 A - 1934-06-14

claim is:-

1 A method of fitting wire rope or 4 o wire cable ends with sheaths, sleeves, sockets, collars or the like, which consists in supporting the cable by a spaced abreast arrangement of pairs of jaws or tongs which circumferentially grip the cable on opposite sides of and adjacent the proposed cut, severing the cable between the pairs of jaws by a high speed rotary cutter, e g, a high speed cutting-off or parting wheel or friction saw, and engaging the cable ends whilst still gripped by the jaws or tongs within their appertaining sheath, sleeve, collar or the like.

2 A method as claimed in claim 1, which consists in supporting the cable by spaced abreast pairs of jaws and in removing the pairs away from the cutter and away from each other after severing of the cable and inserting the cut ends of the cable into their appertaining sheath, collar or the like while such ends are 60 still gripped by the jaws or tongs.

3 A method, as claimed in claim 1 or 2, further characterised by applying a thin metal cap or the like to a severed end of the cable whilst gripped by the 65 jaws or tongs, releasing the cable from the jaws or tongs after capping and passing it through a tubular member, and thereafter again gripping the capped end by the jaws or tongs and removing the 70 cap and replacing it by a permanent sleeve or like attachment while the cable is so gripped.

4 Apparatus for use in the fitting of cable ends with sheaths, sleeves, sockets, 75 collars or the like comprising spaced abreast pairs of jaws or tongs for eircumferentially gripping the cable to be severed and a high speed rotary cutter, e.g, a high speed cutting-off or parting 80 wheel or friction saw, arrangedi to sever the cable bet-meel the pairs of jaws, the pairs being so mounted with respect to the cutter as to permit relative to and fro movement between the work and the 85 cutter, and the pairs being withdrawable relatively to each other to permit the cable ends produced by the severance whilst gripped by the jaws to be engaged within their appertaining sheath, sleeve, go collar or the like.

Apparatus according to claim 4 in which the jaws are detachably mounted on a carrier capable of being swung towards or away from the rotary cutter 95 6 Apparatus as in claim 4 or 5 in which the gripping pressure of the jaws or tongs is applied by screw action against the tension of a spring which automatically opens the jaws when the io( screw action is slackened.

7 Method of fitting cable ends with sheaths, sleeves, sockets, collars or the like substantially as herein described.

S Apparatus for use in fitting cable 105 ends with sheaths, sleeves, sockets, collars or the like substantially as herein described or shown.

9 Cables when fitted with sheaths, sleeves, sockets collars or the like accord j 1 Q ing to the method herein described and claimed.

Dated this 20th day of March, 1933.

HYDE & REIDE, 2, Broad Street Buildings.

Liverpool Street, London, E C 2, Patent Agents for the Applicants.

Redhill: Printed for Hls Majesty's qtnfion'ry Office, lay Love & M Taleomson, Ltd -1934.

PATENT SPECIFICAT It N

Application Date: March 20, 1933 No 8398/33 411627 Complete Accepted: June 14, 1934.

COMPLETE SPECIFICATION.

Improvements in and relating to the Fitting of the Ends of Wire Rope or Wire Cable with Sheaths, Sleeves, Sockets, Collars, or the like.

We, FRANB: PRESTON DAVIES, British Subject, and Bo WDEN (ENGINEERS) Lm IITBD, a British Company, both of Victoria Road, Willesden Junction, London, N W 10, do hereby declare the nature of this invention and in what mlanner the same is to be performed, to be particularly described and ascertained ill and by the following statement:-

The present invention relates to the fitting oi the ends of wire rope or wire cable, composed of wires or strands of high tensile steel and hereinafter referred to as the cable, with sheaths, sleeves, sockets, collars, or the like, particularly in cases where such a sheath, sleeve or the like made of relatively soft and malleable metal is to form an attachmient which is to be anchored to the cable by embedding tlie metal of the attachment in the helicoidal grooves of the cable.

Such a metal attachment intended to be anchored to the cable in general consists of a surrounding piece of stock having a smooth or roughened internal wall which is embedded in the helicoidal grooves of the cable by gathering in or diminishing the diameter of the stock to the required shape.

For this purpose the reduction in diameter of the stock is effected cold by swaging or contracting tools The swaging operation may be carried out by a series of blows which may be either light elastic blows following each other in rapid succession, or a series of dead blows transmitted through appropriate swaging C dies, whereby the attachment is so contracted as to force the metal of the cable surrounding wall to be embedded into the hielicoidal grooves of the cable.

In particular the present invention aims to further promote the high degree of accuracy and uniformity of initial engagement between the interior of a sleeve or like attachment and a cable' which is an important aim of the applicants' prior application No 36,592 dated 24th December 1932 (Serial No 405,784).

5; 0 according to which a sleeve or socket or collar or like attachment is provided of relatively soft and malleable metal having a wall so internally= acecuratelsworked to size by continuous or discontinuous ridges with respect to a given 55 cable that the elevated portions ot the roughened internal surface shall be an easy push fit on to that cable when the attachment is applied thereto to be uniformly radially contracted thereon 60 The roughening of the internal wall is preferably carried out as described in the prior application referred to above by threading and/or rifling the internal wall of the attachment which has been previ 65 ously prepared by boring, preference being had to internally threading the attachment by a tap which cuts a flat or blunt top thread preferably of fine pitch relatively to the pitch of the cable wires 70 Where the attachment is internally rifled, the rifling may substantially conform to the lhelicoidal grooves of the cable.

In the preparation of the cable for the 75 purpose of introducing it into an attachmeart, whether having a smooth or roughened internal wall, the cutting or shearing of the cable, composed as it is of wires or strands of high tensile steel, is 80 difficult to perform cleanly, that is to say, without the ends of the individual wires or strands or the whole strands parting or fraying or barring, even if it is of the so-called " dead lay " type, that is, the 85 type which is made by preforming the strands before laying, and it is therefore usually necessary, for the purpose of subsequently facilitating the'insertion of the cable end in the attachment, to bind an such end to be either by soldering or with fine wire on either side of the proposed cut.

The usual method is to solder the strands together and to cut through the 95 soldered portion, the soldering being done either by means of a soldering-bit or by immersing the cable portion which is to be cut in a bath of molten metal.

An alternative method of holding the 100 strands together by binding the cable with fine wire on either side of the proposed cut is-rather a lengthy process andl is expensive, while the wire binding must generally be subsequently removed 105 but such alternative method is preferable to soldering where the -end pieces are of be attached by cold swaging to force the metal of the attachment to be embedded in the helicoidal grooves of the cable, because solder between the cable and the attachment not only prevents their direct contact, but the solder under a tension load on the cable acts as a lubricant or slident owing to its comparatively low 10-coefflcient of friction, so that the junction becomes inferior to one made without solder; further the presence of solder between the cable strands prevents that solid compaction which so favourably promotes resistance to parting of the united parts.

The soldering method is also open to the objection of the harmful action of the flux on -the metal of the cable and the 2 x attachment.

Whether the cable end to be has been bound by soldering or with fine wire to prevent parting or fraying it must now be cut and the aim not hitherto realised is to do this without deformation because if the cable is to be inserted into an attachment with a push or sliding fit, this insertion can only take place if the end of the cable is not frayed and is free from 00 burrs, hooks or bends, but should these be strongly formed during the cutting process, the cable end must then be dressed to shape which is another tedious and expensive operation.

The foregxoing difficulties in th e preparation of the cable are obviated or mitigated by the present invention accord ing to which in lieu of soldering the cable or binding this with wire and severing the cable by shearing methods which strongly deform the cut ends even when using semi-circular blades, the cable is supported by a spaced abreast arrangement of pairs of jaws or tongs which 4 circumferentially grip the cable on oppo site sides of and adjacent the proposed cut, and while so supported, cold severance is effected between the pairs of jaws by a high speed rotary cutter the cable ends being then engaged within their appertaining sheath, collar or the like whilst still gripped by the respective pairs of jaws or tongs The rotary cutter may take the form of a high speed cutting off or parting wheel or friction -saw preference being had at present to an abrasive-wheel cutting-off machine whereby the cable is cut through so cleanly and so easily that p Dractically no burr is thrown up, and neither the cable nor the single sttrands are distorted or only to a very slight degree so that subsequent dressing of the end, if required is -radilv and quickly accomplished at small expense.

{M A We also provide apparatus for carrying out the method above described coim rising spaced abreast pairs of jaws or tongs for gripping the cable to be severed and a high speed rotary cutter arranged to sever the cable between the pairs of 70 jaws, the pairs being so mounted with respect to the cutter as to permit relative to aiid fro movement between the work and the cutter, and the pairs being withdrawable relatively to each other to per 75 mit the cable ends, produced by the severance, whilst gripped by the jaws to be engaged within their appertaining sheath 1 sleeve, collar or the like.

In order that the present invention 80 may be the more readily understood reference is made to the constructional example of apparatus suited to carry it into effect as illustrated in the accompanying drawings, in which: 85 Fig 1 is a perspective view of the apparatus.

Fig 2 a part side view thereof.

As shown in the accompanying drawings, apparatus is provided consisting of 90 an abreast pair of spaced tongs or Jjaws 1, 2 by which the cable 3 is gripped circumferentially on opposite sides of the proposed cut, so that while so supported the cable 3 can be presented to a narrow 95 high speed abrasive wheel 4 whereby the cable is cut so cleanly and with such slight pressure that little or no burr is thrown up and the cable as a whole as well as the single strands remains sub 100 stantially undistorted.

A separation of the companion tongs or jaws 1, 2 of about 4 " serves well, and we have found good results obtainable using an abrasive wheel of about 1 " in width 105 and 4 " in diameter driven by an electric motor 5 at a speed of 9 000 r p m.

A convenient and advantageous mounting of the companion jaws or tongs 1, 2 is one in which the jaws or tongs 1, 2 110 have a readily removable hook-like connection 10 with a carrier 6 pivotally mounted on the table 7 of the machine carrying the abrasive wheel 4, so that the carrier 6 with the companion jaws or 11 t tongs 1, 2 and the rope or cable 3 gripped thereby may be swung towards and away from the abrasive wheel 4 by a lever 8.

11 are positioning pins to hold the tongs or jaws against lateral displacement 12 The gripping pressure may be exerted by a screw 12 acting in the tails of the jaws or tongs 1, 2 against the tension of a cylindric spiral spring 9 which auto-' mnatically opens the jaws when the screw 125 action is slackened.

When the severing operation is comnleted, each cable end is still gripped by its apuertaining pair of toners 1 or 2 so 3 that the free end is prevented from fray411,627:

411,627 ing and such end which extends about 4-" from the tongs is inserted into an attachment whlich has been prepared for it for example as described in the specification of our application No 36,592 dated 24th December 1932 (Serial No.

40,,784) The tongs are now removed and the rope or cable 3 pushed home in its attachment after which it is ready for 510 swaging.

If one attachment has been swaged on.

and it is desired to insert the cable in a length of tubular Bowden outer mechanisni before the other end is swaged, the cable is cut as described to the desired length and a thin metal cap pushed onto the second cut end before the tongs are removed The rope or cable with the thin cap which must be of smaller diameter than the internal diameter of the outer mechanism is now passed through such outer mechanism, the tongs are replaced, the cap removed and the second and permanent attach-25 ment put in its place and swaged.

Any slight burr which may be thrown up by the cutting abrasive wheel -4 can be readily removed by chamfering e g, by working it off by presenting it to the periphery of another abrasive wheel mounted in a plane at right angles to the plane of the cutting-off wheel.

Having now particularly described and 3 ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we