Патент USA US2411838код для вставки
FIPQnnQ / OQ 294119938 fvzé Nov. 26, 1946. R. C. SWENGEL TOOL Filed Feb. 5, 1944 2,411,838 ûßéllbll HUUi 2,411,832!l Patented Nov. 26, 1946 UNITED STATES PATENT DFFICE 2,411,838 TOOL Robert C. Swengel, Harrisburg, Pa., assignor to Aircraft-Marine Products, Inc., Harrisburg, Pa., a corporation of Pennsylvania 1 Application February 5, 1944, Serial No. 521,219 3 Claims. (Cl. 81-15) 2 The present invention relates to an improve ment in crimping tools, more particularly to a type employed in securing terminal pieces to end further object has been to provide a crimping tool having the advantageous features above re ,ferred to and which is simple and rugged and portions of electrical conductors, as wires, cables, inexpensive to make. or the like, without the use of solder and by 5 In this specification and the accompanying crimping or pressing the ferrule portion of a ter drawing, I have shown and described a pre minal around said end portions of the wire. ferred embodiment of my invention and various A known form of manually operated crimp modifications thereof; but it is to be understood ing tool for this purpose provides two sets of that these are not intended to be exhaustive crimping dies, one set for crimping a part of the nor limiting of the invention, but on the con ferrule around an insulated portion or sheath trary are given for purposes of illustration in oi' the wire, and the other set for coining an order that others skilled in the art may fully other part of the ferrule directly upon a portion understand the invention and the principles of the metal core which has been stripped of thereof and the manner of applying it in prac its insulation or sheath. Such a tool is described tical use so that they may modify and adapt in Patent No. 2,359,083 to Vernon E. Carlson. it in various forms, each as may be best suited In using said tool, the dies of which are nor to the conditions of a particular use. mally biased to open position, the wirel end In the accompanying drawing, in which a sat initially assembled with the ferrule portion of the isfactory form of crimping tool embodying the terminal to be secured thereto, is brought be invention for achieving the above objectives is tween the dies of said sets. That part of the set forth: ferrule which embraces the sheath is crimped Figure 1 is a view in perspective, with handle thereon by the set of diamond crimping dies; and another partgof the ferrule embracing the bare core is crimped thereon and materially de formed by the set of coining dies which also im part corresponding deformations to the core. Figure 2, a side elevation of the parts shown in Figure 1; Figure 3, a sectional view through the center of the dies showing the crimping dies, the fer This manner of ferrule crimping produces a desirably secure and low resistance connection rule guide plate, and a terminal with its ferrule in operative position to be crimped by said dies portions omitted; between the terminal and the wire. However, 30 on the end of a wire; the coining produces an elongation of the fer Figure 4 is a view similar to Figure 3 but show rule, and this has made it diiiicult to design ing the tool and ferrule at the end of the crimp jigs for locating the ferrule relative to the dies, ing operation; and in particular necessitating use of springs to ab Figure 5, a view in perspective of a terminal sorb such elongation and prevent the terminal secured by crimping on the end of a wire. from jamming between the dies and the jig. The crimping tool illustrated in the drawing Moreover, a different jig is required for each comprises opposed die carrying jaws pivoted to terminal. Where different terminal ends are a pair of handle grips I which are themselves being connected to the same size wire this un pivoted at 2 and normally biased to extended or necessarily multiplies the number of tools re 40. open position. Tie plates 3 are pivoted to the quired. jaws at 4, so that said jaws can fulcrum against One object of the present invention has been each other when acted upon by the handles. to provide a crimping tool which may be em The outer ends of said jaws carry sets of crimp ployed to produce the combined diamond crimp ing dies, one set being the opposed diamond and ferrule coining on different types of ter 45 crimping dies at 5 and 6 and the other set being minals without jamming in the tool. Another the opposed coining dies 'l and 8. object has been to provide such a tool with de A guide plate provided with a slot open at one vices by which the terminal may be more quick end and secured at one side of die 8 has a stop 1y and accurately inserted in the tool in position portion 9 adjacent to the path of crimping move to be crimped into secure engagement with the ment of die 1 toward die 8, and against which wire end. Where the terminal employed com one end of ferrule I0, Figure 3, abuts when po prises a ferrule and an attaching tongue, as is sitioned in the tool for crimping. One side or usual, a further object has been to utilize the edge 9a of said slot opposite stop portion 9 and tongue in quickly and eiîectively positioning the a shelf or flange ll projecting laterally there ierrule for crimping in the crimping tool'. A 55 . from, by engaging the tongue l2 when in crimp S. 3 2,411,838 ing position, predetermine the angular relation of the crimps formed in the ferrule to said tongue. Or, said edge 9a alone and without ilange I I, may 4 bination with a pair oi jaws movable one to ward the other and defining a forming recess therebetween and each being provided with a fer rule-coining die portion in opposed relation to a. corresponding die portion of the other, of a fer serve the same purpose by engaging and properly positioning the base portion I4 of tongue I2. The closed end I3 of the slot serves at the same rule positioning guide plate supported by one oi' time as a stop to position the ferrule in coaxial said jaws and having a ferrule engaging stop relation to the dies by engaging the side of the portion arranged in laterally overlapping relation tongue I2 when the terminal is inserted in the to said forming recess; said stop portion having tool for crimping. 10 an edge substantially parallel to and spaced from 'I‘he clearance between the jaws adjacent the die portion of the supporting jaw by an crimping dies 5 and 6 when in normal open rela amount slightly less than the over-all cross tion is such that a ferrule of appropriate size is sectional height of a ferrule to be crimped. properly inserted endwise from the right, Figure 2. In a crimping tool for securing a. terminal 3, and moved to the position there shown The 15 having a ferrule to a wire or the like, the com ferrule is stopped at this proper position by the bination of a pair of jaws movable one toward edge of the ferrule Il) -abutting the stop 9. the other and deiining a forming recess there As the jaws come together in crimping, the between and each being provided with a ferrule diamond crimp dies 5 and 6 effect a constricting coining die portion in opposed relation to a die grip indicated at 5a (see Figure 5) on that por 20 portion of the other, and a guide plate secured tion of the ferrule engaged by them while the to one of said jaws and provided with a slot open coining dies 1 and 8 partially flatten and ap at one end and closed at the other; a ñrst edge propriately defonn that other portion of the fer of said slot being substantially flush with the rule engaged by them as indicated at 'la in Fig most recessed die portion of the jaw to which said ure 5. A progressive elongation of the ferrule is 25 guide plate is attached and a second edge of said thereby produced which could cause jamming of slot being spaced from said .ñrst edge by an the coined portion between the dies and the in amount slightly less than the over-all cross terior guide face or stop 9, except that the effec sectional height of a ferrule to be crimped. I. g i l ., tive extent of said stop where it engages the fer 3. In a crimping tool for securing a terminal rule I0 is such that when said ferrule is flattened 30 having a ferrule to a. wire or the like, the com by initial compression between dies ‘I and 8, it is bination of a pair of jaws movable one toward pushed below the edge of and thus disengaged the other and deñning a forming recess there from said stop 9 and may therefore be further between and each being provided with a ferrule deformed without jamming as the crimping and coining die portion in opposed relation to a die coining are completed. 35 portion of the other, and a guide plate secured One eiîect of crimping and coining is to flatten to one of said jaws and provided with a slot open the ferrule toward an axial plane parallel with at one end and closed at the other; a ñrst edge the plane of tongue I2, so that the wire end with of said slot being substantially ñush with the a terminal secured thereon may be freely and most recessed die portion of the jaw to which easily ldisengaged from the tool and pulled out 40 said guide plate is attached and a second edge of through the end when the dies are returned to said slot being spaced from said ilrst edge by an normal open position. In the form shown, this amount slightly less than the over-all cross mode of removal is facilitated by the provision sectional height of a ferrule to be crimped, and of said slot in the guide plate with its open end said closed end of said slot being arranged with adjacent to the open end of the jaws. respect to said forming recess to provide an abut I claim: ment for positioning the terminal in proper axial l. In a crimping tool for securing a terminal relation to the dies. having a ferrule to a wire or the like, the com ROBERT C. SWENGEL.