US2664553A

US2664553A - Soldering terminal for electrical wires

Info

Publication number: US2664553A
Application number: US184827A
Authority: US
Inventors: Epstein Hirsch
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-09-14
Filing date: 1950-09-14
Publication date: 1953-12-29
Anticipated expiration: 1970-12-29

Description

Dec. 29, 1953 H, EPSTEIN 2,664,553

SOLDERING TERMINAL FOR ELECTRICAL WIRES Filed Sept. 14, 1950 Y 23 2z l J3 10 fa MGE/fm Patented Dec. 29, 1953 l rieure si* '5 SOLBERING-TERMINALFORELECTRICAL WIRES This 4-iriveriticn i relates generallyI to soldering terminals and more particularly v.is concerned with soldering yterminals which are intended to be produced at high speed, preferably as a staple beingzdriven intda sheetA of. insulating material, and providingia juncture between a fine wire and a heavy wire. The invention resides in the ter- 'rninal-ahl in the method of producing same.

in the transformer field; the coils which 'make up the various parts of the transformer farevery Ioften Wound of -very Y finel wire having limited mechanical strength. -It is customary-and practical to soldeia heavywire to the fine wire .and provide an anc-hor for the heavy Wire, .whichiwill resist the tensionand--abuse to which the transformer leads maybesubjected. This anchor. is usually a terminal member secured to some part of the transformer to remove all tension from the line wire. The terminal which is shown, described and claimed herein is of this type, and while useful in the transformer and ballast field, is not necessarily limited thereto.

One of the important objects of the invention is to provide a soldering terminal of the character described which is extremely simple and highly economical, and which can be applied with great speed for purposes of quick production.

Another object of the invention is to provide a method oi forming such a terminal from a strip of metal in the saine manner that a staple is formed.

Still a further object of the invention is to provide a terminal formed initially of a U-shapcd member having one leg longer than the other, and which terminal is secured to a base member with the shorter leg cinched over the top of the base member and the longer leg curled over to form a heavy wire receiving socket, and about which a fine wire may be wrapped.

Other objects lie in the details of the embodiment described hei'einaiter for purposes or' illustration of the manner in which the invention 1s practised.

1n the drawings:

Fig. 1 is a perspective View of a strip of metal from which the terminal of the invention is formed.

Fig. 2 is a perspective View of the terminal prior to its being secured to its insulating base, same being formed with legs.

Fig. 3 is a perspective view of the terminal in its iinally iorined condition, same being shown without the insulating base for clarity.

Fig. 4 is a perspective View, partially 1n section showingf. af. terminal secured" to' af base and zfhavingiafne:anda coarse wire soldered thereto.

Fig-i5 is Aa. sectional' view in`1 more Acr lessdia- ;'giamniatic form` showing the manner in which 5 1.a?staple;driver and anvil may be used to `insta-ll luthe;terminal 4upon an insulating base.

Referring now to the drawing, the terminali@ isfshowninstalled inilig. 4 and is shown dissociatedfrom'the wires and insulating base `in zgfigr. The terminal i9 consists of a` U-shaped .,stripofometal having a pair of legs II and l2 of @unequal length and ya connecting bridge I3. The

shorter -legi i. has its free endibent at rightangles :parallel withthe bridgev I3 to'form .a clamp lug '45. iii W-hichtig-htly engages the upper surface .of

- the insulating base to 'which the terminal isse- -oured. :Thus inflige there is showniaesheet 'member of` insulating material forming the .base

it having the clamp lug lf3 tightly engaged against the top surface i5 thereof with the bridge I3 tightly engaged against the bottom surface I5 thereof. Obviously the short leg II extends through the thickness of the base l5, and

was driven or in any other manner passed through the same while in the condition shown in Fig. 2, namely, unbent.

As for the longer leg I2, same has its upper end doubled upon itself as shown at I5 but with the bent portion spaced from the body of the leg l2 to form therebetween a passageway or socket Il. The leg I2 must also pass through the insulating base while in unbent condition as shown in Fig. 2. The doubled over portion must be formed after the leg I2 is completely through the insulating base member I5.

The slot or passageway Il permits a heavy or coarse lead wire I8 to have its bared end engaged therein and soldered thereto. 'ine large metal to metal contact provides a good adherent for the Solder (not shown) and a mechanically good frictional engagement. 'ihe upstandmg leg I2 with its bent over portion It' enables a few turns of the iine Wire It to be taken upon the same so that when the coarse wireis soldered in place the solder will flow upon the wrappirigs of the fine wire.

'l'he Iree end of the bent over portion I6 may or may not clear the surface I5 of the base member It', although it is preferred that there be a space so that the fine wire will be wrapped wholly upon the unbent portion oi' the leg l2.

'lne teriiiinais may be iorined in any or a number or' ways, although 1t is preferred that they be handled as staples and installed by means of a stapling machine.

The base member l may be pre-perforated to receive the terminals in the condition shownV in Fig. 2, and then the legs Il and l2 may be bent by any appropriate tools. In such case, the terminals may be furnished in the condition shown in Fig. 2 or Fig. 1. If in the form of Fig. 1, namely as a strip cut to size, some simple forming jog may be used to bend the same to the shape desired.

As stated herein it is preferred that the terminals be installed much as staples. The art is replete with stapling machines which carry coils of wire or metal strip, and which, When operated, form the staple, sever it from the coil, drive it into the material, and bend the legs to cinch the same. it is contemplated that this terminal be formed in this manner. The terminal is rst formed in the stapling machine with the legs unbent as shown in Figs. 2 and 5. If desired, when the legs are severed from the principal coil, they may be provided with sharp ends as shown at 28.

The staple driver is indicated schematically at 2i and the anvil or forming die at 22. The points of the terminal l are driven through the base member. Ehe point of the long leg I2 enters the curling cavity 23 and follows a path indicated by the arro v shown in Fig. 5 in said cavity. This will result in the formation i5 which will provide the desired socket Il. Simultaneously the short leg l2 enters the cinching cavity 2li, and following the path of the arrow illustrated therein, it is lformed into a lug lf2 overlying the top surface l5' and clamping the terminal l@ thereto.

It is believed that the invention has been sufnciently described Without any necessity for further details and it is to be understood that many variations are possible Without departing from the spirit of the invention as defined by the appended claim.

What is claimed and desired to be secured by Letters Patent of the United States is:

A soldering terminal for joining a coarse wire and a fine Wire, said terminal being secured to a sheet member of insulating material and compricing a staple-like, substantially U-shaped, iiat strip member of uniform width having its bridging portion engaged against one surface of the sheet member in face to face contact therewith, the legs of said strip member being of unequal lengths, the Yshorter leg having its free end bent parallel to the bridging portion and engaged against the opposite surface of the sheet member, the longer leg extending perpendicular to the sheet and having its ree end formed with a reverse curved bend of at least thereby forming a socket spaced from the said opposite surface adapted to receive said coarse wire, said longer leg having a straight portion between the socket and the said second surface of sufficient length to permit the Wrapping of ne Wire about said straight portion.

HIRSCH EPSTEIN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 1,122,290 Mack Dec. 29, 1914 1,815,212 Ogg July 21, 1931 2,293,596 Del Camp Aug. 18, 1942 2,435,756 Larkin Feb. 24, 1948 2,462,127 Pheazey Feb. 22, 1949 2,464,405 Knauf Mar. 15, 1949 2,515,105 Weisberg July 11, 1950 2,517,848 Del Camp Aug. 8, 1950