US2557816A - Mandrel - Google Patents

Description

J. DI PALMA June 19, 1951 MANDREL 2 Sheets-Sheet 1 Filed Dec. 28, 1949 INVENTOR.

' JOSEPH DI PALMA ATTORNEY Patented June 19, 1951 MANDREL Joseph Di Palma, Fairfield County, Cnn., as-

signor to Dominick Di Palma, Brooklyn, N. Y.

Application December 28, 1949, Serial No. 135,490

9 Claims.

This invention relates to improvements in mandrels for use in weaving and forming expansible and contractile cable grips, and has for a principal object the provision of a mandrel having a tubular body having detachably mounted thereon a plurality of annular rings, which form a working fit on said body, and which are firmly secured to the tubular body by means of screws or the like. Each ring carries a plurality of radially projecting L-shaped pins or hooks which are welded or otherwise permanently secured thereto.

Another object of the invention is the provision of a mandrel having a tubular body with evenly spaced holes, to be engaged by screws, disposed along one line thereon, and with like variably spaced holes disposed along another line thereon spaced apart from the first mentioned line so that the annular rings may be secured on the mandrel body in accordance with the type of cable grip to be woven, screw holes in the rings being so arranged that whether the rings are secured thereon by screws engaging one row of holes or the other row of holes, or some holes in one row and some in the other, the pins or hooks on all of the rings are in rows parallel to the axis of the tubular body. This arrangement provides the greatest flexibility, because the mandrel may be rapidly set up for the weaving of constant mesh cable grips, variable mesh cable grips, or for grips in which the mesh is combinational.

A further object of the invention is the provision of a cable grip mandrel which extends vertically from a fixed base, the portion within said base being supported therein by frictionless bearings, thereby providing free rotation, without end play for the mandrel, and greatly facilitating weaving operations.

Other objects will be apparent to those skilled in the art, upon a study of this specification and the accompanying drawings.

Referring to the drawings which illustrate one embodiment of the invention;

Figure l is an elevational view of a complete cable grip mandrel mounted in its base;

Figure 2 is an elevation of a portion of the'mandrel per se with a plurality of the annular ring members secured thereon for weaving variable mesh cable grips;

Figure 3 is an elevation the same portion of the mandrel as seen from the right side of Figure 1, except that the annular ring members are evenly spaced thereon for weaving constant mesh cable Figure 4 is a cross-section taken along the lines 4-4 of Figure 3;

Figure 5 is an elevational view of the mandrel of Figure 3, showing a portion of a cable grip woven thereon;

Figure 6 is a sectional elevation of the base in which the mandrel is mounted;

Figure 7 is a cross-section similar to Figure 4, but showing a different means for securing the ring member to the tubular mandrel body; and

Figure 8 is a view similar to Figure '7, showing yet another means for securing the ring memher to the tubular mandrel body.

Referring first to Figure 1 the mandrel ID has,

an extension H which is secured in the rotor H! of the base l3.

The mandrel it, referring to Figures 2 and 3, includes a tubular body 4 having a series of tapped holes l5 therein along a vertical reference line I6. These tapped holes are equally spaced along the reference line l6 and are to be used as will hereinafter be pointed out for setting the mandrel up for the weaving of constant mesh cable grips.

In Figure 2 a second reference line I! is formed on the body l4, spaced 60 with respect to the reference line It, and a series of tapped h0les|8 are formed along this reference line and are Variablyspaced so that by the use of these holes, the mandrel may be set up for weaving variable mesh cable grips.

In cases where combinations of constant mesh and variable mesh are desired, some of the holes I5 will be used and some of the holes IS in accordance with the requirements.

A plurality of annular ring members is provided for mounting on said body and designated by the numeral I9. Each rin member is comprised of a solid annulus 20 having closed holes therein to accommodate screws such as screw 2| each of which engages the tapped holes I5 and/or l8. Rigidly secured on each ring member 20 is a plurality of radially projected generally L-shaped pins or hooks 55 which are welded or otherwise permanently and rigidly secured thereto. These hooks are equally spaced circumferentially about] the ring member and as stated before for con-" stant mesh weaving, the ring members are mounted on the body M with the screws 2| engaging the holes l5 along the reference line It. As seen gaging the tapped holes l8 along the reference line H.

Referring now to Figure 6 the base generally 3 designated by the numeral 13 includes the flange base member 22 havin a boss 23 formed integrally therewith and having a threaded counterbore 24 therein. A tubular member 25 has its lower end externally threaded and engagin the threaded hole 24. The tubular member 25 has a counterbore 26 formed therein terminating in a shoulder 21 to accommodate the outer race 28 of a ball bearing 29 and this outer race is secured therein against the shoulder by a threaded ring 30 which engages threads 3| formed in the counterbore 26. Below the threads 3| is formed a wider passage 32 to clear the threads formed on the threaded ring 30.

At the upper end the tube 21 has a counterbore 33 formed therein and providing a shoulder 34 against which the outer race 35 of a ball bearing 36 may rest. The counterbore 33 has a portion 31 which is enlarged and threaded and a threaded retaining ring 38 engages these threads and forces the outer race 35 against the shoulder 34. Retaining ring 38 has a counterbore'39 which will be presently described.

A sleeve shaft 40 has a portion 4| on its lower end of reduced diameter and forming a shoulder 42 against which the inner race 43 of the ball bearing 29 rests and this inner race is secured thereon against the shoulder by means of a nut 44 engaging the threaded lower end of the portion 4!. nut 44 and the inner race 43. The upper end .of the sleeve shaft 40 has a portion 46 of reduced diameter providing a shoulder 4'! against which the inner race 48 of the ball bearing 36 may rest. Beyond the inner race 48 the portion is provided with threads 49.

A sleeve member 58 has a central hole 5! therethrough to accommodate the extension H of the mandrel and opposing set screws 52 are provided for securin said extension in the hole 5!. The sleeve member has a threaded counterbore 53 therein which engages the threads 49 and generally clamps the inner race 48 against .the shoulder 41. The bore 39 in the member 38 is sufiiciently larger than the exterior diameter of the sleeve member 50 to permit the latter to rotate freely.

In the modification shown in Figure 7, the ring member 28 is provided with tapped holes-53 which are engaged by the threaded shanks of screws 54 A washer 45 is provided between the and the straight dowel shanks 56 of the screws I'G-and l'i but'no holes are formed therein. In-

stead the point or tip 58 of the set screw 59 engages the body MD and retains the ring thereon.

Although I have herein shown anddescribed one embodiment of the invention and two modifications thereof, it will be obvious to those skilled in the art that many changes may be made in the arrangements herein shown and described withinthe scope of the appendedclaims.

What is claimed is:

l. .A mandrel upon which woven expansible and.contractible cable grips are formed, comprising a cylindrical body, a plurality of ring members carried thereon in spaced relation ;to each-other, each ring carrying a plurality of hook members spaced apart from each other-thereon, and screw means cooperatively engaging each ring and saidbody for :detachably retaining said rings on said body.

2. A mandrel upon which woven expansible and contractible cable grips are formed, comprising, a cylindrical body mounted for rotation about a vertical axis; a plurality of rings, each carrying a plurality of equally spaced hook members; a vertical reference line formed on said body as a guide for indicating a predetermined spacing for said rings and also as a guide to insure vertical alignment of said hooks, and individual screws passing through said rings and engaging said body for rigidly mounting said rings thereon.

,3. A mandrel upon which woven expansible and contractible cable grips are formed, comprising a cylindrical body adapted to be rotated about a vertical axis as the weaving progresses, a series of radial holes formed in said body along a vertical line and spaced apart from each other in a predetermined order, a plurality of rings each forming a working fit on said mandrel and each carrying a plurality of equally spaced hook members and a screw hole between at least one pair of said hook members, and individual screws passing through the holes in said rings and each engaging a radial hole in said body for securing said rings on said body in said predetermined order.

4. A mandrel according to claim 3, in which two series of said radial holes areoppositely disposed in said body, said holes being tapped, and in which each ring has clearance holes oppositely disposed therein, whereby each ring is rigidly secured on said body by two screws passing through the clearance holes therein and threads edly engaging said tapped holes in said body.

5. A mandrel according to .claim 3, in which two series of said radial holes are disposed in said body in said predetermined order, in which a second two series of radial holes are disposed in said body in a difierent order, all said holes being tapped, and in whicheach ring hasclearance holes oppositely disposed therein, whereby said rings may be combinationally spaced on said body by securing some of them on by means of screws engaging tappedholes of one seriesand by means of other screws engaging tapped holes of the other series.

6. A mandrel upon which woven expansible and contractible cable grips are formed, including, a cylindrical body carrying protuberances upon which the weaving may be effected, a base supporting said body for rotation about a vertical axis, and comprised of a flanged base member, an upstanding tubular extension secured thereto, a tubular shank carrying spaced frictionless bearings positioned in said tubular extension, means within the latter engaging outer races of said bearings for retaining them and said tubular shank therein, and means for centrally securing the lower end of said cylindrical body in said tubular shank.

7. In a mandrel upon which woven expansible and contractible cablegrips are formed, a cylindrical body, and a plurality of rings detachably mounted thereon in predetermined spaced relation to each other, each ring being comprised of a web of material formed into a ring to form a working fit on said body and carrying a plurality of hook members.

.8. In a mandrel upon which woven expansible and-contractible cable grips are formed, a cylindrical body, a plurality of threaded holes formed in said body,-and -a plurality of rings detachab ly mounted thereon in predetermined spaced relaion to each other e chrrine be co r ed-9 a web of material formed into an annulus and welded to form a closed ring, a plurality of hook members secured to said ring and permanently secured thereon, and clearance holes to accommodate screws which engage corresponding ones of said threaded holes formed in said cylindrical body.

9. In a mandrel upon which woven expansible and contractible cable grips are formed, a cylindrical body, a plurality of rings detachably mounted thereon in predetermined spaced re- 10 No references cited.

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