US3181110A

US3181110A - Solderless electric connector

Info

Publication number: US3181110A
Application number: US126257A
Authority: US
Inventors: Jessie H Raborg
Original assignee: Individual
Current assignee: Individual
Priority date: 1961-07-24
Filing date: 1961-07-24
Publication date: 1965-04-27
Anticipated expiration: 1982-04-27

Description

April 27, 1965 H. F. WATERS SOLDERLESS ELECTRIC CONNECTOR 4 Sheets-Sheet 1 Filed July 24, 1961 INVENTOR. Haney F. n/a-re as April 27, 1965 H. F. WATERS SOLDERLESS ELECTRIC CONNECTOR 4 Sheets-Sheet 2 Filed July 24, 1961 INVENTOR. Hagar F- Var as m z Zwom April 1965 H. F. WATERS 3,131,110

SOLDERLES S ELECTRIC CONNECTOR Filed July 24, 1961 4 Sheets-Sheet 3 W? w 1Z3 I 1/ I 1 I INVENTOR. J/ARLY F. 14/!) was A ril 27, 1965 H. F. WATERS 3,181,110

SOLDERLESS ELECTRIC CONNECTOR Filed July 24. 1961 4 Sheets-Sheet 4 INVENTOR. l/ARKY F. WATERS BY mwz United States Patent 3,181,110 SGLDERLESS ELECTRIC CGNNECTOR. Harry F. Waters, Hotel. Roosevelt, Madison Ave. and

45th St., New York, N.Y.; Jessie H. Raborg, administratrix of said Harry F. Waters, deceased Filed July 24, 1961,83. No. 126,257 3 Claims. (El. 339-223) This invention relates to solderless connectors for use on wire and similar materials and to the methods of making same and dies used therefor.

An object'of the invention is to provide an efiicient, cheap and simply formed connector for electrical. use utilizing a looped end of a wire. Toeflfectuate this object, applicant has utilized the interrelation between a looped end of wire and a crimped metal ring sheath for clamp.- ing force engagement to bind the looped end, to maintain electrical characteristics of the Wire at the bounds looped end, to increase the mechanical strength thereof inclusive of tensile strength and to insure against relative movement between the loop and the sheath.

A further object of the invention is to provide a connector utilizing the interrelationship between. a wire loop and a crimped metallic sheath asset forth wherein the sheath forms a part of a metal strip terminal, the latter serving to maintain alignment and rigidity of the wire adjacent the looped end region; 7

A further object of the invention is to provide a method of forming an end connector including utilization of a hallow metallic post in association with an end wire loop for loop binding, at least maintenance of electrical characteristics of the wire at the looped end and to increase the mechanical strength thereat including tensile strength.

Another object of the invention is to provide a method for forming connector products as mentioned utilizing a system of reducing clamping force engagement of the post at the junction of the looped end and the adjacent wire area for wire entry into the sheath.

A further object of the invention is to provide die structures to effectuate results obtained as set forth. above.

These objects and other incidental ends and advantages of the invention will hereinafter appear in the progress of the disclosure and as pointed out in the appended claims.

Attached are drawings showing several preferred forms of the invention wherein:

FIGURE l is a view in perspective of a twin type of connector strip formed from metal stock and having a hollow post formation part, a shank part and a connector part;

FIGURE 2 is a view in perspective of the device shown in FIGURE 1 wherein the parts are crimped and wrapped about wires at insulated and insulation-stripped parts;

FIGURE 3 is a view in perspective of a single connector blank oil a connector strip;

FIGURE 4 is a view in perspective of the blank of FIGURE 3 crimped and wrapped about a wire at insulated and insulation-stripped parts;

FIGURES 5, 6 and 6a are views in perspective similar to FIGURE 4 showing different formations of end connector parts;

FIGURE 7 is a sectional view of FIGURE 4 across the plane 7-7 thereof;

FIGURE 8 is a plan view of an elongated connector strip and having similar structure as the twin strip shown in FIGURE 1;

FIGURE 9 is a side view in elevation showing a press for crimping the hollow post formation in the connector blank about a wire end loop for sheath production;

FIGURE 90 is a view in section showing the blank and hollow post formation provided with an upper edge p assent Patented Apr. 27, 1-965 flange to maintain connection between the loopand post before the crimping operation;

FIGURE 10 is a sectional view showing die pieces of a press for the blank and hollow post formation for forming a metallic'sheath around a wire loop;

FIGURES 11 and 12 are views similar to FIGURE 10 showing advanced stages of press operation;

FIGURE 12a is a sectional view showing the upper die piece of the press of FIGURE 10 modified;

FIGURE 13 is a view in perspective .of a multiple press operative on. a connector blank for post, crimping about an insulation-stripped end loop 'andwrapping of ears about other wire portions;

FIGURE 14 is a view in perspective of a connector blank showing the device in operative position on the looped. end of a cord or rope;

FIGURE 15 is a view in perspective of a modified form of connector blank wherein an independent hollow element is introduceable in an opening therein. for crimping around a looped end of wire or cord;

FIGURE 16 is a sectional view of FIGURE 15 across the plane 1616 thereof showing the hollow element crimped around a looped end and secured to the wall of the blank;

FIGURE 17 is an exploded View in perspective showing the hollow formation of a blank crimped over a wire end and the'crimping die piece provided with a notch leading into the forming groove to limit crimping pressure at the area of junction between the wire loop. end and the entering wire region;

FIGURE 18 is a sectional view of FIGURE 17 across the plane 18-18 thereof;

FIGURE 19 is a View in perspective showing a wire end loop and a metallic sheath formed therearound with crimping pressure reduced at the wire entry region and for application to a post terminal;

FIGURE 20 is a sectional view of a hollow post in spool conformation to engage a wire end loop between the flanges prior tothe crimping operation to effect the product shown in FIGURE 19;

FIGURE 21 is a view in perspective showing the product of FIGURE 19 applied to a cord or rope loop.

In accordance with the invention and the several forms shown, a metallic connector blank generally indicated by numeral 20 as seen in FIGURE 3 is a unit having a shank end generally indicated by 21 and a lug or connector end generally indicated by 22.. Intermediate the

ends

21 and 22 is a hollow upstanding conformation 23, upstanding longitudinal edge wall portions 24 and upstanding wrapping ears 25. The shank 21 is provided with bendable and opposing wrapping

cars

25 and 27. The lug end 22 has an opening 28 for connection to a second conductor.

As seen in FIGURE 4, post 23 is adapted to form a sheath 23' about bare wire end loop 29 by a crimping operation, while ears 25 are wrapped around the bare wire adjacent area and

ears

26 and 27 are wrapped around the insulation 30 of the wire. An area 31 of the sheath 23' is olfset for reduced clamping engagement to admit entry of the wire within the sheath.

FIGURES 5 and 6 show different types of connector ends from 22 seen in FIGURES 3 and 4; such as axially aligned U shaped connector 32., offset U shaped connectors 33.

FIGURE 6a shows a modification of edge walls 24 at 24' wherein parts overlap loop 29 and approach sheath 23' for reinforcement.

The blank 20 shown in FIGURE 3 may come from a strip 20a shown in FIGURE 8 and formed from'metal stock. As shown in FIGURE 1, the twin blank 2% derivative from 20a shows separation mark 34 for division or cutting between the lug or connector end portions,

lateral

blank connections

37 and 38 shown in phantom As shown in FIGURE 15, a substitute is made for the blank hollow formation 23 by introducing into blank opening 39 a hollow post or rivet 40 with a bottom flange 41 and effecting crimping thereof around a wire loop 42 as seen in FIGURE 16. This is accomplished by the die shown in FIGURES 17 and 18 which has a tapered element 43 and a peripheral crimping groove 44, said groove having anentry notch 4-5 to effect a reduced crimped area 46 in the sheath 40 for wire entry.

FIGURE 14 shows the blank applicable to a cord or rope loop 47 V FIGURE 9:: shows a modification of blank hollow conformation 23 by having a top flange 48 so that the loop 29 shown in phantom may not slip through prior to the crimping operation.

, Crimping for the blank hollow conformation 23 about the wire loop may be done by ordinary pliers or an eyelet type of hand or power press machine modified by the, notch as described with respect to FIGURE 17. Thus the press indicated by numeral 48 has a die ,piece 49 having a peripheral groove 50 to crimp the upper end of hollow post formation23 around the loop 29 as seen in FIGURE 10, a bottom die with a socket 52 being shown. A notch entering groove 50 is shown in FIG- URE 9 to relieve crimping pressure as heretofore mentioned. FIGURES 11 and 12 show successive stages of die operation shown in FIGURE 10.

FIGURE 1221 shows a modified groove in die piece 49. whereby the blank longitudinal walls 24 are also crimped about the loop 29 to form a continuous sheath.

FIGURE 13 shows a multiple press 54 for simultaneous operation of a crimping operation and wrapping of the

blank ears

25, 26 and 27. The dies are diagrammatically indicated by 55-5511, 56-5611, 57-5711 and ,In FIGURE 20 is shown a hollow metallic post 59 for use solely as a binding for a wire or cord loop and as a sheath in clamping engagement. The post 59 is preferably provided with upper and

lower flanges

60 and 61 to trap the loop as 62 in FIGURE 19 and thereafter the post ends are crimped-as at 63 aroundthe looped end. Thus a new type of wire 65 is provided with an eyelet end afforded by a metallic sheath. A reduced clamping area 64- is provided for the reasons mentioned.

In FIGURE 21 is shown a cord or rope 66 with an eyelet end with same features as shown in FIGURE 19 and indicated by primed numerals.

It is distinctly understood that minor changes and variations in the structure of the product, the methods and apparatus used in formation may all be resorted to without departing from the spirit of the invention and the scope of the claims.

I claim:

1. A connector for a length of insulated wire comprising, a wire formed at one end with a non-insulated loop, the connector consisting of a metallic strip formed at one end with a connecting lug for attaching it to a point of electrical contact, the opposite end of the strip having a pair of laterally directed wings for extension about an insulated portion of the wire, a hollow post extending from the strip between the connecting lug and the wings, said post being encircled by the non-insulated loop and having an overturned flange behind which the loop is confined, a pair of prongs struck from the body of the strip and located between the post and the wings, said prongs being extended around the non-insulated part of the wire and securing the junction ends of the non-insulated loop, and side flanges extending along the opposite sides of the strip, said flanges being. located to the rear of the connecting lug.

2. A connector as provided for in claim 1, wherein the side flanges are curved inwardly at one end toward the post and wherein the prongs are located between said flanges and are spaced therefrom. 1

3. A connector as provided for in claim 2, wherein the flanges are bent inwardly at their curved ends so that the inwardly-benttportions of said flanges overlie parts of the non-insulated loop.

References Cited by the Examiner UNITED STATES PATENTS 380,829 4/88 Swarts 339-269 849,028 4/07 Stevens 339-223 1,026,653 5/12 Brunt 33932 1,154,354 9/15 Wakefield 339-32 1,491,838 4/24 Zimmermann 339223 1,537,728 5/25 Bagley 339276 1,921,745 8/33 Grace 339-276 1,955,695 4/34 Celing 339 -277 X 2,326,100 8/43 Lavarack et a1 339-223 2,426,831 9/47 Krueger 339223 2,659,406 11/53. Locke. 2,818,632 1/58 Hammell 29-15555 2,917,099 12/59 Seward. 3,077,027 2/63 Sola et a1 29155.55

FOREIGN PATENTS 598,546 2/48 Great Britain.

JOSEPH D. SEERS, Primary Eraminei'.

Claims

1. A CONNECTOR FOR A LENGTH OF INSULATED WIRE COMPRISING, A WIRE FORMED AT ONE END WITH A NON-INSULATED LOOP, THE CONNECTOR CONSISTING OF A METALLIC STRIP FORMED AT ONE END WITH A CONNECTING LUG FOR ATTACHING IT TO A POINT OF ELECTRICAL CONTACT, THE OPPOSITE END OF THE STRIP HAVING A PAIR OF LATERALLY DIRECTED WINGS FOR EXTENSION ABOUT AN INSULATED PORTION OF THE WIRE, A HOLLOW POST EXTENDING FROM THE STRIP BETWEEN THE CONNECTING LUG AND THE WINGS, SAID POST BEING ENCIRCLED BY THE NON-INSULATED LOOP AND HAVING AN OVERTURNED FLANGE BEHIND WHICH THE LOOP IS CONINED, A PAIR OF PRONGS STRUCK FROM THE BODY OF THE STRIP AND LOCATED BETWEEN THEPOST AND THE WINGS, SAID PRONGS BEING EXTENDED AROUND THE NON-INSULATED PART OF THE WIRE AND SECURING THE JUNCTION ENDS OF THE NON-INSULATED LOOP, AND SIDE FLANGES EXTENDING ALONG THE OPPOSITE SIDES OF THE STRIP, SAID FLANGES BEING LOCATED TO THE REAR OF THE CONNECTING LUG.