US2182342A

US2182342A - Method and apparatus for making helices without the aid of a core or mandrel

Info

Publication number: US2182342A
Application number: US253799A
Authority: US
Inventors: Karitzky John
Original assignee: Diamond Expansion Bolt Co Inc
Current assignee: Diamond Expansion Bolt Co Inc
Priority date: 1939-01-31
Filing date: 1939-01-31
Publication date: 1939-12-05
Anticipated expiration: 1956-12-05

Description

Dec. 1939. J. KARITZKY 2,182,342

METHOD AND APPARATUS FOR MAKIN ELICES WITHOUT THE AID OF A CORE QR v NDREL Fil 31, 1939 ed Jan. 4 Sheets-Sheet 1 INVENTOR TTORNEY Dec. 5, 1939. .J. KARITZKY 2,182,342

IBTHOD AND APPARATUS FOR MAKIN ELICES WITHOUT THE AID OF A GORE 0R NDREL Filed Jan. 31, 1939 4 Sheets-Sheet 2 L J J l l I l l I INVENTOR {07112 Karitzkg,

Dec. 5, 1939. I J

AND ,A UT 11 2,182,342 LICES ANDREL 4 Sheets-Sheet 3 KARITZKY PPARATUS FOR MAKING E AID OF A CORE 0R M led Jan. C51, 1959 MET 1939- J. KARITZKY. Y 2,182,342

METHOD AND APPARATUS FOR MAK'INGHELICES WITHOUT THE AID OF A CORE 0R MANDREL Filed Jan. 31, 1939 4 Sheets-Sheet 4 umnlHlIlHlH [la/4 O O V M5 w-x BY Patented Dec. 5, 1939 PATENT OFFICE METHOD AND APPARATUS. FOR MAKING HELICES WITHOUT, THE AID-F A CORE 0 MANDBEL John Karitzky, Garwood, N. J., assignor to Diamond Expansion Bolt Company,

Garwood,

N. J., a corporation of New Jersey Application January 31, 1839, Serial No. 253,799

10 Claims More particularly my invention covers the method and apparatus for making helices cheaply and expeditiously. These helices may be used for various purposes. They are particularly adapted to support and hold objects on a wall, pole or any other support.

I have shown helices made by my invention, supporting a power wire, or line wire, though of course the helices are adapted for various other uses.

Helices have heretofore been made by employing a cylindrical core or mandrel around which the wire was wound, the core or mandrel being then removed. This method is slow and expenin large quantities manufactured by the old method above described. By my invention the cost of manufacture is so reduced that theycan be used in large quantities to support line wires, power wires, or similar members, from walls,

. poles, or other supports.

My invention further relates to certain combinations, sub-combinations, methods and details of construction, all of which will be more fully hereinafter described and pointed out in the claims.

For purposes of illustration I have shown different forms of helices, made by my invention, supporting a power wire, or a telephone line wire, from a wall or other support.

In the figures I have shown different embodiments of my invention, the same reference numerals refer to. similar parts of the several figures.

Fig. l is a front elevation of a wall or other support on which a double helix is supported by an insulator, and in turn cooperates with and grips a power-wire or a line wire.

Fig. 2 is a transverse section on line 2-2 of Fig. 1;

Fig. 3 is a vertical section on line 33 of Fig. 1 looking in the direction of the arrows, the wall, insulator, helix and power wire being in section.

Fig. 4 is a plan view of a blank or piece of straight wire, preferably, though not necessarily, bent in the middle to form an eye, from which one form of helix is made by my invention.

Fig. 5 is a plan view of a helix made, according to my invention, out of the left arm of Fig. 4. The other, or right arm 13 (Fig. 1) is, in this form of my invention, formed into a helix separately.

Fig. 6 is a fragmentary view, partly in section 5 ratus to carry out my improved method.

sive. It is not economically feasible to use helices and partly in side elevation, of one form of appa- Fig. 7 is a transverse vertical section on line l'| of Fig. 6, looking in the direction of the arrows.

Fig. 8 is a horizontal section on line 8-8 of Fig. 6, lookingdown in the direction of the arrows, the lower dies 8-8 being shown in plan.

Fig. 9 is a vertical section on line 8-8 of Fig. 8, looking in the direction of the arrows.

Fig. 10 is an enlarged detail fragmentary view, similar to Fig. 9, showing the cutaway portions of the dies, and the spring-back of the wire after it has been purposely over bent. The upper dies are shown being withdrawn after forming the helix with the aid of the lower dies.

Figs. 11 to 15 inclusive illustrate a modification in which double helices may be made at one and the same time. Fig. 1-1 is a plan view of a wire blank bent to form two (2) parallel arms and preferably, though not necessarily, an eye.

Fig. 12 is a plan view of a double helix formed in one operation from the blank of Fig. 11.

Fig. 13 is a plan view of the lower set of double dies to make the double helix of Fig. 12. The complementary upper set of double dies is not illustrated.

Fig. 14 is an end elevation of dies shown in' Fig. 13.

; Fig. 15 is a fragmentary sectional detail view on line I5|5 of Fig. 13, illustrating the cutaway portion of all the dies to avoid marring' the wire.

By my invention I subject wire, or similar material, to pressure at different angles to the longitudinal axis of the wire, to form one or more, helices as may be desired in the finished article. Preferably they are formed at one operation, or they may be formed successively.

I have illustrated in the drawings one form of apparatus which Ihave found very successful in use.

In Figs. 6 to 10 inclusive, I have shown portions of a power press and a die set in which I '"isthe bolster plate, and 2 the movable ram of the press. The punch pad, 3 of the die set is -connected to the movable ram 2 in any suitable manner, as by the;

studs

4, 4.} The base 5 of the die set is connected to'the bolster plate I of the press in any suitable manner, as by the

studs

6, 6.

On the base 5 is secured, in any suitable manner, as by the screws I, I Fig. 6, a plurality of

lower dies

8, 8. These

lower dies

8, 8 are spaced from each other just the width of the'upper dies 8, 8 carried by the punch pad 3, in any suitable manner, as by screws 1, 'I (not shown with dies 8, 8).

one of the double 25 Kill the t and 9 are shown more clearly in Else. 2', it and d. it will be se n all these

dies

8 and 9 have curved, tortuous or sinuous shaping or bending surfaces it, it, figs. 7 and 8. The shaping or bending athletes in the upper dies t, (J are shown in dotted lines in S.

In operation the arm it of. the blanlr i l, l, is allowed to rest on the die surfaces iii in the lower dies t, d. The power press is then operated to move the ram 2, with the punch pad 53, carrying the upper movable ti, 9 towards the lower dies 8, supported by tlie nommovable base d, secured to the non movable bolster plate 6 of the press. gored with relation to each other, Figs. and i l. litter the

upper dies

9, 9 contact with the arm E2 of the blank i they continue their movement towards the hired base plate 5. in doing so they place pressure at diiierent angles to the longitudinal axis of the arm 62, causingthe arm 62 to follow the sinous or tortuous shaping or bending surfaces oi the dies 8 and il, Figs. 6 and 9, to form a helix, Fig. 5.

In practice, it is found desirable to over bend the wire as shown in dotted lines it, it in Fig. 1c. The spring of the wire it, as the pressure is released by withdrawing the upper dies 9, 9 in the direction of the large arrow in Fig. 10, will cause the wire B2 to spring back; from the position indicated by the dotted. lines it, it in Fig. ill, to the full lines shown in that figure. This is indicated by the small arrow in that figure. Of course, this spring back of the wire is compensated for.

To prevent shearing strains on the wire l2, which would tend to indent it, or if it is made of hard metal covered with a softer metal, as for example copper, i cut away or ease off the edges of the dies 8, and ii, at W, ill, see Fig.

.. it, which will also prevent marring of the copper or softer covering of the wire, it such covering be used.

When the arm 52 or the blank it is withdrawn from the dies, it will be a helix as shown in Fig. 5. In the form shown in Fig. i, it would then be necessary to place the arm i3 (broken away in Fig. 5) within the press, when the complete double helix, shown in Fig. i would be formed.

In using this form of my invention, the eye ill or the helix is supported on a wall 25, or other support, by means of the insulator it, which is held by any suitable fastening means as the screw 20.

It will be seen that each one or the helices in Fig. 1 has a longitudinally extending'bore 20, the walls of which are interrupted by the openings betweenthe convolutiors of the helix. It is in this bore 212 that the object supported is held or gripped more or less firmly with sufiici ent pressure to prevent ordinary and excessive loads, causing relative slipping between the helix and the object supported. lit the object supported is a power or line wire 22, the helices will grip it and transfer the strains and stresses to the wall or other support 25, and will prevent the slipping of the power or line wire within the helices, which, if continued, would cause the failure of the line.

The helices can be readily applied by the op- ,eratorgrasping first one end 23, and wrapping the helix around a portion of the power or line wire 22, and then grasping the other end 23, and winding that helix around its portion of The dies i3, i3 and i] are stagaieasca the power or line wire 22, thereby causing the helices to firmly grip the line wire.

Oi course it is to be understood that simply one helix alone, or one helix with an eye it may be employed, by omitting the second arm l3. This form would be exactly as shown in Fig. 5, except that the second arm it] would be out off alittle closer to the eye ill. in such a form one operation of the apparatus carrying the dies would sufice to form the helix shown in that figure. This single helix may be used alone, or with other similar ones, to support a line or power wire, or other member.

In Figs. 11 to 15 inclusive, I have illustrated a modification in which a double helix can be I formed with one operation of the press by us== ing my dies, having double tortuous or siuous shaping or bending surfaces lid, Mil.

in this form of my invention, 1 have illustrated simply the lower double dies ltd, ltd, Fig. 13, carried by the base m5. dies (not shown) are similar in all respects to the dies t of the other form, except they have double shaping or die surfaces lit, Hill, as in Figs. 13 and 14..

In this form of my invention the blank lid, Fig. 11 is placed with its armsi ii and M8, resting in the lower double dies ltd, tilt. When the upper double dies (not shown) are brought down by the press in the manner fully described to form the single helix, Figs. 6, 8 and 9, each arm i it and its will simultaneously be formed into a helix, Fig. 12. If desired, the eye lit in Figs. 11 and 12 may be omitted, as well as the eye id in Figs. 1, 3, t and 5.

The double dies are cut away or eased off at Ill, il in the same manner and for the same purpose as in the apparatus previously described.

If desired, I may form a wire with one helix, then on the withdrawal of the upper dies, I may feed the wire over the lower dies to leave a straight portion of wire, then form another portion of the wire with a helix, and so on, there being as many helices and blank spaces on the wire as may be found desirable.

It will be noted that no mandrel or core is employed, and that the helicescan be manufactored as fast as an operator can feed the blanks to the dies. This so reduces the cost of manufac ture that my helices can be used in quantities, and can successfuly and economically compete with inferior fasteners used for the same purpose.

I am aware that prior to my invention, in the entirely diiferent art of manufacturing wire fabrio, separate strands of wire have been held between two moveable dies and a straight short piece of tie wire has been forced, by a third moveable die or plunger, through circuitous grooves in the first two dies, so as to cause the short tie wire to cross one wire and be wrapped around another wire; both wires forming a part of the wire fabric, or other wire structure, to hold them together.

In such a construction, one of the wires of the wire fabric, which the short tie wire is wrapped around, acts as, andnecessarily is, a mandrel. This is entirely regardless of the third action of the third die or plunger exerting pressure on the end of the tie wire, to force it through the circuitous grooves in the two moveable main dies.

In this non-analogous art, it is to be noted-that the sides of the circuitous grooves, shaping the short tie wire, exert pressure from the exterior of the tie wire towards the center which is resisted and stopped by the strand of the wire fabric The upper double around which it is wrapped, this strand of wire forming a mandrel as previously noted. And, further, this mandrel remains in the curved tie wire because it is all part of the wire fabric or other wire structure.

In my invention, all pressure is exerted by two sets of dies, staggered with relation to each other, each acting on what becomes, in the finished article, the interior of the helix, there being no mandrel, or equivalent, and no die is in line with its opposite die, because they are staggered in relation to each other.

In the non-analogous prior art referred to, the curved tie wire after it is formed, is not meant to be, and cannot be removed from the two wires it holds together, because it all becomes a part of the wire fabric, or other wire structure. It is bent or wrapped in situ and there it remains. It is not adapted to support anything; but is supported by the two wires which it holds together. I make no claim to such a totally different invention.

Having thus described this invention in connection with illustrative embodiments thereof, to the details of which I do not desire to be limited, what is claimed as new and what is desired to secure by Letters Patent is set forth in the appended claims.

What I claim is:

1. The method of forming a supporting helix from wire or similar material, without the aid of a core or mandrel consisting in simultaneously bending a substantially straight wire along its length between oppositely disposed dies, one of which reciprocates relatively to the other, each die having helically curved shaping surfaces, to form a helix having a bore of substantially uniform diameter to support, grip and hold a wire or object mounted within it.

2. The method of forming a supporting helix from wire or similar material, without the aid of a core or mandrel consisting in simultaneously bending, in one operation, a substantially straight wire blank along its length, between oppositely disposed dies, one of which reciprocates relatively to the other, each die having helically curved shaping surfaces, to form a helix having a substantially uniform diameter to surround, grip and hold a wire orobject mounted within it.

3. The method of forming a supporting helix from wire or similar material, without the aid of a core or mandrel consisting in simultaneously bending, in different planes, and in one operation, a substantially straight wire blank; along its length between oppositely disposed dies, oneof which reciprocates relatively to the other, each die having helically curved shaping surfaces to form a helix having an axial bore of substantially uniform diameter to surround, grip and hold a wire or object mounted within it.

4. The method of forming a supporting helix from wire or similar material, without the aid of a core or mandrel by positioning a substantially straight wire blank between oppositely disposed die members, each having a series of spaced shaping surfaces comprising a portion of a helix, and reciprocating one the member with relation to the other die member, to form a helix having a bore of substantially uniform diameter to 10 support, grip and hold a wire or object mounted within it.

5. The method of forming a supporting helix from wire or similar material, without the aid of .a core or mandrel consisting in subjecting that portion of a substantially straight wire blank which is to become a part of the inner surface of the axial bore of the helix to pressure in different directions between oppositely disposed dies, one of which reciprocates relatively to the other, each die having helically curved shaping surfaces, to form a helix having a bore of substantially uniform diameter to surround, grip and hold a wire or object mounted within it.

6. An apparatus for forming supporting helices without the aid of a core or mandrel as separate articles of manufacture, comprising two dies, one of which reciprocates, each of said dies provided with spaced shaping surfaces comprising a portion of a helix, to bend a wire blank in one operation in a plurality of planes to form a helix having an axial bore of substantially uniform diameter.

7. An apparatus for forming without the aid of a core or mandrel supporting helices as separate articles of manufacture, comprising two dies, one of which reciprocates, said dies provided with spaced shaping surfaces comprising a portion of a helix to bend a wire blank in one operation in a plurality of planes to form a helix having an axial bore of substantially uniform diameter, the edges of said dies being cut away to form clearances .to prevent a shearing or marring action on the wireblank.

8. An apparatus for forming supporting helices as separate articles of manufacture, without .the aid of a core or mandrel, comprising a plurality of dies, at least one of which reciprocates, said dies each having spaced shaping surfaces comprising a portion of a helix to bend a wire blank in one operation of the reciprocating die in a plurality of planes to form a helix having an axial bore of substantially uniform diameter.

9. An apparatus for forming without the aid of a core or mandrel supporting helices as separate articles of manufacture, comprising two dies, one of which reciprocates and each provided with die surfaces, each die surface having spaced shaping surfaces comprising a portion of a helix, said shaping surfaces contacting only with that portion of the wire blank which when shaped by the dies to form a helix becomes a portion of the interior surface of the axial bore of the helix, which bore is of substantially uniform diameter throughout.

10. An apparatus for forming without the aid of a core or mandrel supporting helices as separate articles of manufacture, comprising two dies, one of which reciprocates and each provided with staggered shaping surfaces comprising a portion of a helix so that any particular portion of the wire blank will be operated upon by a die shaping surface free from pressure of the adjacent staggered die shaping surface, and each die shaping surface contacting only with that portion of the wire blank which when shaped by the shaping surfaces to form a helix becomes ,a portion of the interior surface of the axial bore. of the helix, which bore is of substantially uniform diameter throu8 0ut.

JOHN KARITZKY.