US2727299A - Process for making electrical terminals - Google Patents

Description

Dec. 20, 1955 F. KLUMPP, JR

PROCESS FOR MAKING ELECTRICAL TERMINALS Filed Feb. 27, 1953 //Mf BY 279i@ d(- unm United States Patent t) PROCESS FOR MAKING-ELECTRICAL TERMINALS Ferdinand Klumpp, Jr., Union,-N. J., assigner to Hayman Manufacturing Company, Kenilworth, N. 3.

Application February 27, 1953;-Serial N o. 339,419"

5 Claims. (Cl.`29 155.55)"

This invention relates to 4aprocess for'making electrical conductor terminals in stripV form which is Athen taken `to an assembly machine for connecting an electrical cable composed of a -pair of'conduc'tors toy a 'pair of terminals ready for a subsequent operation which will be later referred to. By makingconductor terminals for the purposes to be described in stripformmuch time and material isf saved and `thisis a furtherirnportant object of'my invention. By having the 'terminals `arranged' in stripform ready to receive a pair of' conductors forming an electrical cable much timeis saved as individual terminals do not have tol be handled, and the terminals` beingin strip form, the assemblyoperation of the conductor cable thereto is greatly'speeded up while doinga better assembly job.

My'process will be understoodby'referring to the annexed drawing wherein Figure l shows one endof the strip as it comes outv of the press readyifor assembly with a cable, the strip and its parts being shown twice the size of a working structure Figure lA shows va right 4end pairof terminals of Figure l after the conductor or the cable `has been-placed in' position and the parts of` the terminal forced over tli'ebarred lend of the conductors end,"therterminals being severed from the plate strip.

Figure 2 is a View on the lihe 2 2of'Figure Figure'3 is a View on the line 3 3 of Figure Figure 4 is a View on the line 4 4 of Figure Figure 5 is a View on the line 5 5 of Figure Figure 6 is a view on the line 6 6 of Figure Figure 7 is a view on the line 7 7 of Figure Figure 8 is a View on the line 8 8 of Figure Figure 9 is a view on the line 9 9 of Figure Figure l is an end view of one of the terminals.

Figure ll is part sectional and part elevational view showing the cable with its terminals molded into a socket type plug for making a connection to contacting member forming the right end portion of the two parts of Fignre 1l.

From the dilerent views wherein like numbers refer to corresponding parts, 1 is a strip of suitable metal such as copper or alloy thereof which is usually used for making terminals of the type described. As the strip 1 comes into the punch press, holes 2 are punched therein for guiding purposes of the strip. As the strip comes through the press similar orifices 3 and 4 are punched out simultaneously on one side of the strip leaving an anchoring strip on one side of the main plate. Also the press punches at the same time similar orifices 6 and 7 on the opposite side of the strip leaving a centrally located strip 8 to which the portions 9 extending in one direction between the central strip 8 and the side strip 5. Also punched simultaneously with the portions 9 are similar portions 10 extending in opposite directions from the center strip 8. While the parts 9 and 10 are being punched from the strip, stops 11 are punched, upwardly in portions l l l. l. l l l 9 and downwardly intportions stops will be later described.

Directly after the portions 9 `and It? the sides 12 Patented Dec. 20, 1955 10. The purpose ofrthese have been formed and 13 in the portions 9 are 4turned upwardly? while the portions 1G have their sides 14 turned 'downwardly as indicated by the section line s 5 and 6: Itvviil" be noted from Figures 6 and 7 and by reference tofsec'tion lines 6 6 and 7 7 that the arm i5 has been'forced upwardly from the center strip 3 whereby the tornied'merhl'" bers 19 can be turned over into the spaces between th'e terminals located `between the metal support strip8 aridj the-side strip 5 as indicated in thel right hand end-ofl Figure l Where it is seen that the terminais extending from? the central strip 8 are free at the end 16 whereasftheite'rminals from the portions 9 are anchored atboth-ends but? the two terminals are'alike in all respects and-closely" spaced together so that later on in the assembly operation* as indicated by the last two terminals at the rightend-of' Figure l, the cable C need have its ends separated only l' a very srnall amount in order to have the baredends' inserted into the open portions of the terminal against;

the stops 1l.

Directly after the portions lo have immediateiy after they have been bent been'formed and over as above de-Vl scribed so that they are positioned between the central* strip 3 and the strip 5, the portions formed'by the side members '.113 and i4 are rolled into shown at l/ leaving only a very slight a purpose' which will be later describe closed position as* gap 18, ifany, 'forVv d. While the two right endterminals of Figure l are shown as having conductors of the cable C placed coming from the punch press, i prefer strip as formed shown by the sections inposition on the strip -to take the entire-' and 10 in separate i assembly operation where the terminals are severed from the central support with the connection the terminals.

of the conductors strip 3 and the strip 5 simultaneously One-of the useful purposes of the terminals is shown in Figure ll wherein Iplug member 'P isl formedbymo'ld'- ing suitable insulating material around therv assembly shown in Figure la. in doing this aslid over the folded part 2i of each 22 is formed at the junction of the folded part the adjacent part of P stop 22 positions the paper sleeve Zit w paper slee've-'20`is terminal. A stop 21 and receives the cable conductor. This hich is utilized for the purpose of preventing the insulating material of the plug member P, be at the folded parts be sure to make good holes 26 into a support member.

the left end of Figure ll that the member P completely encloses the the cable C and since conductors sha that might metallic member passing through it will be noted from nk 27 of the plug termina! ends carrying of the cables are only slightly spaced for the assembly operation the material of the shank 27 embraces the slightly spaced ends of the cable C thereby providing complete conductors of the cable C. it this construction is important because frequency that is applied to a terminal adapted for use in connection insulation for the will be understood that of the voltage and which is especially with television work.

From the foregoing it will be seen that I have obtained the objects of my invention in Having thus described my l. The process of making terminals a fast and efiicient manner. invention, what I claim is:

in pairs for simultaneous connection to the conductors of a twin conductor cable, said process consisting in blanking out metal on 0 opposite portions of a strip of suitable being anchored to a centrally extendin on one side of the strip having free e metal, said blanks g strip, the blanks nds, an edge strip extending along and anchored to the ends of the blanks on the other side of the center strip, forming up all of said blanks to receive conductors and bending over the formed blanks of one set into alternate positions with respect to the other set of formed blanks ready to receive the bared ends of the twin conductors into said formed up pairs of terminals and also ready to complete the final locking engagement with the conductor before they are severed from the pair of terminals having the conductors fastened thereto.

2. A process for making electrical conductor terminals for the purpose described, which consists in passing a strip of suitable metal through a punch press, punching out simultaneouslyportions of the material on opposite edges of the strip in staggered relation to form blanks for at least one pair of mating'cooperative conductor terminals, the said blanks extending in opposite directions from a central longitudinally extending portion of the strip to which their adjacent ends are anchored, then forming said blanks in opposite directions to a preliminary shape to Vreceive conductors, then bending over at least one of said formed blanks into side by side relationship with the other mating one of said formed terminals ready to receive conductors.

3. A process for making electrical conductor terminals for the purpose described, as set forth in claim 2, and further defined in that the two sets of blanks are anchored at their adjacent ends to said central portion of the strip, while the opposite ends of one set of blanks are normally anchored to an outer edge of the strip and the corresponding ends of the other set of blanks are free whereby these ends are bent over between alternate similarly formed ends of the first mentioned set of blanks in side by .side alignment and further dened in that after the two sets of partially formed ends have been brought into side by side alignment, their corresponding ends are then rolled up to receive a circular conductor While the opposite ends are left open to receive in pairs the bared ends of a twin conductor, and further defined in that each blank as formed is preferably provided with a stop for each type of conductor, while a special stop is preferably provided on each terminal to receive a guard sleeve for the purpose described.

4. A process for making electrical conductor terminals Y for the purpose described, which consists in passing a stripV l blanks, then-forming said blanks in opposite directions to form similar terminals, then bending over on said centrally located band the said terminals having the free ends so they will be in alternate arrangement between each other, then iinishing the forming operation, the process being further defined in that the end of all of the terminals connected to said centrally supporting band and including those which are bent over alongside the other terminals, has the metal rolled up in circular forms for the purpose described while their adjacent opposite ends are left open to have bared ends of two conductors placed simultaneously in the two adjacent terminals.

5. The process of making electric conductor terminals which consists in passing a sheet of suitable metal through a punch press, blanking out metal to form two sets of op- K positely disposed portion in staggered relation, all anchored to a longitudinally extending relatively narrow centrally located straight middle strip and each portion also all having stop parts thereon intermediate its length, one set of said portions having freel ends while the other set is anchored to an outer edge strip, partially forming all of said portions, and bending over on the said middle strip the portions having free ends to alternately intermingle with the other portions and then finishing the forming operation by rolling up of the metal next to said middle strip for about half the length of each portion and including one of the stops which substantially closes the rolled up portion at the inner end thereof.

References Cited in the lile of this patent UNITED STATES PATENTS 2,004,555 Kleinmann et al lune 11, 1935 2,116,269 Kobzy Mar. 3, 1938 2,128,132 Frederick Aug. 23, 1938 2,534,867 v Hennessey Dec. 19, 1950 2,565,599 Elliott Aug. 28, 1951

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