US1435069A - Method of making insulated fastenings - Google Patents

Description

B. G. JANSSON.

METHOD OF MAKING INSULATED FASTENINGS- APPLICATION FILED NOV-6,1920.

1,435,069. Patented Nov. 7, 1922;

Patented Nov. 7, 1922.

UNITED STATES PATENT OFFICE.

BENNETT G. JANSSON, OF SAUGUS, MASSACHUSETTS, ASSIGNO R TO C. CHANDLER BLAKE, OF BROOKLINE, MASSACHUSETTS.

METHOD OF MAKING INSULATED FASTENINGS.

Original application filed January 23, 1917, Serial No. 144,034. Divided and this application filed Novembet 6, 1920.

To all whom it may concern:

Be it known that I, BENNETT Gr. JANSSON, a citizen of the United States, residing at Saugus, in the county of Essex and State of Massachusetts,'have lnvented a new and useful Improvement in a Method of Making Insulated Fastenings, of which the following is a specification.

The present invention relates to fastenings which are used in telephone construction to secure telephone wires to woodwork, and is a division from my co-pending application Ser. No. 144,034, filed January 23, 1917, which has matured into Letters Patent No. 1,366,661, dated January 25, 1921.

These telephone wires are usually secured to the woodwork either by an insulated staple which straddles the wires or by a nail having a shank which passes between the wires. The staple carries a saddle of fibre which protects the insulating covers on the wires from the corrosive action of the metal of the staple. The nail, which has a wider range of utility than the staple, does not afford the insulating properties of the staple as the shank of the nail in being driven be tween the wires often cuts through the cover of the Wires and forms a connection therebetween. Moreover, it is easy to knock the head of the nail from the shank during the wire-securing operation with the result that the sharp prongs for holding the head to the nail are exposed as a menace to the hands or clothing. k

The object of the present invention is to produce a nail for securing telephone wires to woodwork which will be simple and cheap to manufacture, which will afford reliable insulation to the wires secured thereby, and which will permit the driving of the nail into hard woods without danger of the head becoming separated from the body portion of the nail.

To the accomplishment of these objects, and such others as may hereinafter appear, the various features of the present invention relate to certain methods of manufacture fully set forth hereinafter, the advantages of which will be readily understood by those skilled in the art.

The various features of the present invention will be readily understood from an in- Serial No. 422,281.

spection of the accompanying drawings illustratin the best form of the invention at present evised, in which,

F1gure 1 is a longitudinal section of the d e for producing the improved fastening with a strip of fabric for the cap positioned for the operation of the dinker;

Fig. 2 shows the cap dinked out of the strip and the nail with the cleat assembled thereon positioned for the operation of the plunger;

Fig. 3 shows the plunger partially elevated with the cap molded over the head of the cleat;

Fig. 4 shows the plunger at the end of its stroke with the body of the cleat compressed upon the nail, with the head of the cleat compressed Within the skirt of the cap, and with the wire-separatingteat formed upon the bottom of the cleat;

Fig. 5 is a vertical section of the insulated fastening embodying the features of the present invention;

Fig. 6 is a vertical section of the present telephone wire-fastening nail; and

Fig. 7 is a detail of the nail shown in Fig. 6 with the head thereof removed.

The present commercial nail for securing telephone wires to woodwork comprises a nail 1 (Figs. 6 and 7) the shank of which carries a metal strip 2 having a pair of prongs 3 formed thereon. These prongs are forced into a button 4 molded from paper pulp. In driving this nail into woodwork in order to secure a pair of telephone wires 5, the point of the shank often cuts into the cover of the wires and forms a connection between the wires. Moreover, the strip 2 sometimes is driven through the cover and short-circuits the wires 5. In driving this nail into hard woods the hammer-blows separate the button 4 from the prongs 3 and these prongs are then free to injure the hands or clothing: As the button 4 is molded from paper pulp it is necessary to paint the nail in order to render its appearance attractive. This painting operation is performed by tumbling the nails in a barrel containin paint. The shank of the nail is thus prov'fied with a coat of paint which seriously interferes with the penetration of the nk in) W006. thus necessitating the delivery of hard blows on the button 4; to drive the nail home. Moreover, the thick button 4 acts as a cushion on the head of the nail and thus absorbs a part of the hammerblows intended for the nail head.

In the illustrated embodiment of the present invention the nail 6 (Fig. 5) is provided with a wooden cleat '7 which is provided with a tapered-teat 8 to facilitate its passage between a pair of telephone wires 9 and with a concave shoulder 10 for engaging the wires. The cleat 7 is compressed upon the nail 6 and is bound in compressed condition on the nail by a binder or cap 11 which is molded over the head of the cleat. The cap is preferably molded from a disk of fibre and consequently no painting operation is necessary as the natural finish of the fibre imparts an attractive appearance to the nail.

With this construction there is no danger of the nail forming a connection between the telephone wires as the part of the nall adjacent the wires is wood. The nail may be severely pounded while being driven into hard woods as the cap 11 securely holds the cleat 7 on the nail 6. Furthermore, as the fibre disk is comparatively thin the blows delivered on the cap are transmitted without loss to the nail head.

In making the fastening, an ordinary nail 12 (F i 2) is driven through the center of a cylin rical block of wood 13 in such manner that the head of the nail is embedded in the upper surface of the block. Conveniently, the nail and block are assembled and then positioned on an arm 14 in a die 15 having. a support 16 for a strip of fibre 17 The die is provided with a dinker 18 which dinks out a disk-19 (Fig. 2) from the sheet of fibre; A plunger 20 is then elevated to lift the assembled nail and block from the arm 14 and position it against the' disk 19. Continued elevation of the plan er pushes the assembled disk, block an nail up throu h a restricted throat 21 in the dinker 18. uring this movement of the plun er the disk 19 is rovided with a circum erentially depen mg skirt molded over the head of the block 13 into the wood of which it slightly sinks (Fig. 3).

. The throat-of the dinker is closed by a chamber 22 having a button-shaped cavity 23 therein which cooperates with the flaring edges 24.- of the throat 21 to form a 'die cavity. Continued elevation of the plunger forcibly pushes the nail, block and molded time t disk into this cavity whereu on the block is compressed upon the nail an molded within the depending skirt of the cap. At the same e upper end of the plunger 20 forms the teat 8 and concave wire-engaging shoulder 10. After the insulated nail is formed in the manner illustrated in Fig. 4, the chamber 22 is elevated and thereafter an ejector 25 is raised within the plunger 20 to engage the mac ine.

. While the embodiment of the invention has been illustrated and described as a fastening for use in telephone construction, it will be apparent to those skilled 1n the art that the fastening has utilit in other arts, such, for instance, as upho stery.

What is claimedas new is:

1. That improvement in the art of making insulated fastenings which consists in assembling a nail having a head thereon and an insulatin body in such relation that the head is withm the body and near the surface thereof farthest from the nail point, and enclosing said surface and nail head with a suitable covering.

2. That improvement in the art of making insulated fastenings which consists in assembling a cleat on a nail, and sinkin a 'cap int-o the material of the cleat tobmd the cleat to the nail, substantially as described' 3. That improvement in the art. of making insulated fastenings which consists in assembling a cleat on' a nail, molding a cap,

oint .of'the nail and eject it from the and compressing the cleat on the nail and.

beneath the cap, substantially as described.

4. That improvement in the art of making insulated fastenings which consists in as sembling a cleat on a nail, molding a cap with a circumferentially depending skirt, and compressing the body of the cleat upon the nail with the head of the cleat compressed within the skirt of the cap, substan tially as described.

5. That improvement in the art of making insulated fastenings which consists in assemblin a cleat on a nail, molding a cap with a circumferentially depending skirt,

and simultaneously compressing the body of the cleat upon the nail with the head of the cleat compressed within the skirt of the cap and forming a teat upon the bottom of the cleat, substantially as described.

6. That improvement in the art of making insulated fastenings which consists in assembling a cleat on a nail and binding the assembled cleat on the nail.

7. That improvement in the art of making insulated fastenin which consists in assembling a cylindrical block on a nail, dink- ,teat on the bottom of the cleat.

9. That improvement in the art of making insulated fastenings which consists in assembling a cylindrical block on a nail, dinking a cap from a strip of material, forcing the assembled block and nail into a restricted throat on the dinker to provide the ca with a circ-umferentially depending skirt enclosing the head of the block, closing the throat of the. dinker to form a die cavity, forcing the assembled block and cap into the die cavity to compress the blockupon the nail with the head of the block com- 11. The method of making nails which comprises assembling a headed nail and a generally disk-like body with the shank of the nail projecting from one face thereof and the head of the nail embedded in the other face, and then applying a cover to the body in a manner to retain the nail in its I assembled relation to the body when the nail is driven.

12. The method of making nails which comprises assembling a headed nail and a generally disk-like body with the shank of the nail projecting from one face thereof and the head of the nail embedded in the other face, and then molding a circular cover over the face of the body containing the nail head, said molding including inturning the margin of the cover below said face to secure the cover and hold the nail in position.

13. The method of makingg'nails which comprises assembling a headed nail and ,a generally disk-like body with the shank of the nail projecting from one face thereof and the head of the nail embedded in the other face, applying a circular cover to the face of the body containing the nail head, then turning down the margin of said cover to form a skirt about the periphery of the body and finally inturning said skirt to secure the cover in position.

14. The method of making nails which includes the steps of manipulating a circular cleat and a wire nail in a manner to position the cleat on the shank just below the head of the nail, forming a projecting teat from the material of the cleat about the shank of the nail, and covering the head of the nail with adisk of sheet material the margin of which extends to and is inturned about the peripheral edge of the cleat.

15. The method of making nails which includes the steps of driving a headed nail through a disk-like block, securing said nail in place by molding a cover over the end of said block opposite the nail point, and forming a central teat projecting from the other end of said block.

16. The method of making nails which comprises driving a headed nail through an annular cleat in such manner that the head of the nail is flush with one face of the cleat, concealing the head of the nail by a cover of sheet material fitted over the cleat, and securin said cover in place by flanging its margin about the peripheral edge of said cleat. i

In testimony whereof have signed my name to this ipecification. I ENNETT G. JANSSON.

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