Патент USA US3028786код для вставки
Aprll 10, 1962 H. KELLER ETAL 3,023,775 CRIMPING TOOL WITH ADJUSTING MEANS Filed June 4, 1959 03 01 N INVENTORS HERMAN KELLER CLIFFORD R. WALDRON ATTOR Néés United States PatentO M»Ice 3,028,776 Patented APY- 10’ 19-62 1 2 3,028,776 rated ring member designed to inter?t between the ser rated surfaces of the portions of the apparatus shown in FIGS. 5 and 6 whereby to effect a ?ne angular adjustment CRIMPING TOOL WITH ADJUSTING MEANS Herman Keller, Sidney, and Clifford R. Waldron, Una I dilla, N.Y.,,assignors to The Bendix Corporation, a 5 between such parts; FIG. 8 is a view in side elevation of one embodiment corporation of Delaware of connector contact and wire leading thereto, which may Filed June 4, 1959, Ser. No. 818,068 be assembled by one embodiment of the indenting tool 2 Claims. (Cl. 81-15) of the present invention; and This invention relates to a tool for indenting a ferrule; FIG. 9 is a view in elevation of a second embodiment such tool is useful, for example, in the fastening of a 10 of contact and lead wire assembly which may be made cable or wire to a lug or contact. by a further embodiment of the indentor tool of the pres The invention has among its objects, the provision of ent invention. I “ a novel improved indenting tool of the type described, The indentor tool of the invention in the embodiment which is characterized by the accuracy and uniformity of thereof shown herein is particularly adapted for assem 15 bling connector contacts, such as those shown in FIGS. the indented products produced thereby. A further object of the invention lies in the provision 8 and 9, upon their lead wires. Such connectors are of an improved indenting tool having an indentor advanc adapted for use in separable electric connectors of the ing cam means pivotally mounted with respect to the in type disclosed and claimed in application Serial No. dentor mounting and guiding means. 808,611, ?led April 24, 1959, by George I. Swanson. In Still a further object of the invention lies in the pro 20 such contact assembly,‘ the- clenching or indenting‘of a vision, in a tool of the type indicated immediately above, ferrule on the contact upon the lead-wire extending there of means for adjusting the inner terminal position of the i-nto is relied upon for both the ‘sole mechanical and ‘sole indentors corresponding to the ?nal, inner angular posi electrical connection between the wire and the contact tion of the indentor advancing and indentor guiding means ferrule. In order'that-such connections shall have'the 25 desired mechanical strength and electrical conductivity, relative to each other. ‘ . Yet another object of the invention lies in the provision both‘ initially and after long periods of arduous service, of an indenting tool of such character, that after the in the connecting ferrule of the contact must be held ‘to dentors have once been advanced forcibly to contact a close tolerances in machining, and the clenching or indent workpiece such as a ferrule, the indentors can not there ing operation must closelycontrolledj Thus, if the de after be retracted to release the workpiece before they 30 gree of indention of the ferrule upon the wire should be have completed the full path of their operative stroke. inadequate, the resulting joint will not only lack the de The above and further objects and novel features of sired mechanical strength, but it will leave a somewhat the invention will more fully appear from the following open structure within the indented ferrule, assuming the description when the same is read in connection with the wire is of the multi-strand type, in which the strands are accompanying drawings. It is to be expressly understood, 35 only loosely packed, thereby allowing the. markedingress however, that the drawings are for the purpose of illus of air into the joint. If, however, the degree of clenching tration only, and are not intended as a de?nition of the limits ofthe invention. or indention of the ferrule wall is too great, either on one or all sides thereof, the side wall of the ferrule will In the drawings, wherein like reference characters refer to like parts throughout the several views, be locally drawn, reducedin gauge, and therebyv weak ened or in some cases evenzpunctured. FIG. 1 is a view in side elevation of a preferred em It will be seen, therefore, that the ferrule indenting operation must be bodiment of indenting tool in accordance with the inven tion, the indentors of the tool being shown in their fully advanced, inner position with the operating arms of the carried out with care, and with precision apparatus, if such manner of connection of electrical ?ttings and lead tool advanced into their inner, most nearly adjacent posi 45 wires thereto is to be satisfactory. The embodiment of indenting tool shown herein has tion; proved to be particularly satisfactory for use by work-' 7 FIG. 2 is a fragmentary view in vertical section gen men engaged in installing in situ electrical connectors in cables. It will be understood, however, that in some in erally through the axis of the head of the indenting tool, the section being taken generally along the line 2-2 of stances it may be desired to mount the headof an indent FIG. 1, FIG. 2 showing a pin contact of a separable elec 50 ing tool made in accordance with the invention on a ?xed trical connector within the tool and in the condition in support, and to rotate the mainparts of the head relative which the ferrule of such contact has been fully clenched to each other as by power means rather than by handles upon a lead vw're connected thereto; . as shown. ~ ' > FIG. 3 is a fragmentary view in vertical section through The head of the clenching or indenting tool of'thc in~ the tool head shown in FIG. 2, the section being taken 55 vention in theembodiment shown is generally designated generally along the line 3--3 of FIG. 2, certain of the by the reference character 10. In describing the tool and parts being shown in elevation, the indentors being shown the parts which form it, the horizontal direction tojthe in their inner, fully advanced position; ' right in FIG. 2 will be termed the forward direction, and FIG. 4 is a fragmentary view in vertical section similar the horizontal direction to the left in FIG. 2 will be to FIG. 3 but with the indentors, and the indentor mov 60 termed the rearward direction. Head 10 is made upof ing arms, occupying their outer, fully opened positions, two main parts, an outer cam housing 11, and an inner, the figure also showing, in phantom lines, an intermediate indentor mounting and guiding element 12. Housing 11; position of the parts wherein the indentors and the in-_ has a central generally circular cylindrical cavity 14 there dentor-operating arms are prevented from outward move within, within which is journalled the main barrel portion 65 of indentor mounting element 12; The camhousing 11 ment; FIG. 5 is a view in vertical section through the indentor has a ?at forward wall 15 through which there extends a mounting element of the head of the tool, the section central, contact-receiving opening 16. Indentor mount; being taken along the line 5-—5 of FIG. 2; ‘ ' ing element 12 has an annular ?ange 17 ?tting within a} FIG. 6 is a view in vertical section through the tool similarly shaped seat in the wall of cam housing 11. A showing the upper end of an indentor-operating arm, the 70 split spring ring 19, snapped into the seat at the rear of section being taken along the line 6-6 of FIG. 2; FIG. 7 is an enlarged view in end elevation of the ser ?ange 1_7,-retains element 12 within the cavity in cam . housing 11. - - - ~ 3,028,776 3 As shown more particularly in FIGS. 3 and 4, element tools 21. 4 It will be obvious that contacts of different 12 has four equally angularly spaced radially directed effective lengths may be operated upon by the tool by the guideways 20, lying at the forward end of element 12 substitution of another locator member 46 having a bore adjacent wall 15 thereof. Radially reciprocable in guide 47 therein of the diiferent required length. The position of nearest approach of handles 30 and 34 ways 20 are four clenching or indenting tools 21, each indentor 21 being very accurately guided in its respec tive guideway. The outer ends of tools 21 are partially of the tool relative to each other is determined by the adjusted position of a stop stud 55, which is threaded into a bore 56 in handle portion 29, as more clearly shown circular cylindrical, as shown at 22, ends 22 having slid in FIG. 1. Preferably, as in the construction shown, the ing engagement with the respective ones of the four cam surfaces 24 on the inner periphery of cam housing 11. 10 slotted outer end of stud 55, by which it is adjusted, lies hidden beneath the upper part of handle extension 30, Between the radially innermost end of each of cam sur thereby to prevent tampering with the adjustment of the faces 24 and the radially outermost end of the next adja cent cam surface, there is located a part circular cylin stop. The embodiment of tool shown is provided with a drical pocket 25 which accurately receives the outer end 22 of its respective indenting tool 21 when such tools are 15 means whereby, once the indentors have been advanced into ?rm engagement with a ferrule, the tool can not be retracted into inoperative position, as shown in solid lines again opened until the indentors have completed their in FIG. 4. Indenting tools 21 are constantly urged out operative stroke. In the illustrative embodiment, such wardly into engagement with the cams 24 and/or the means takes the form of a pawl 57, which is pivotally pockets 25 by a split spring ring 26, which ?ts within slots 27 in the forward faces of the indentors as shown in FIGS. 20 mounted upon arm 32 by means of a pivot pin 59. Pawl '57 is constantly urged into the position shown in full 3 and 4. The spring ring 26 is of such relaxed con?gura lines in FIG. 3 and in phantom lines in FIG. 4 by means tion that it constantly tends forcibly to expand radially of a coil tension spring 60 having the bottom end thereof outwardly of the position shown in FIG. 4. attached to arm 32 at 61 and the upper end thereof at The cam housing 11 of the head of the tool has an extension 29 integral therewith, there being a handle ex 26 tached to the lower end of pawl 57 at 61. In such posi tion the upper, pointed operative end 64 of pawl lies in tension 30, conveniently formed of bent sheet metal, at the central longitudinal plane of arm 32. tached thereto by bolts 31. Adjustably secured to inden_ The end 64 of the pawl selectively cooperates with tor-mounting element 12 is a second, handle-forming arm, three downwardly extending serrations 65, 66, and 67, composed of an upper, centrally apertured portion 32 having an extension handle 34 connected thereto as bolts 30 the point 64 of the pawl, when the tool is open as shown in FIG. 4, lying to the left of serration 65, and, when the 35. The upper apertured end portion 32 of the second tool is fully closed, lying to the right of serration 67. handle is snugly but rotatably received over a central When arm 32 is swung to the right from its full line posi hollow trunnion-like member 36 which projects rear tion shown in FIG. 4, the upper end 64 of pawl 57 snaps wardly from element 12. Portion 32 is adjustable angu larly with respect to member 36, and thus with respect 35 into the valley between serrations 65 and 66 or if such motion is continued, into the valley between serrations 66 to element 12, by the following mechanism. The rear and 67. In either of such two latter positions, the pawl face of element 12 is serrated as shown more clearly in 57 is swung counterclockwise, as shown in phantom lines FIGS. 5 and 7. Such serrations, which are designated in FIG. 4, so that the pawl 57 now effectively prevents 37, are equally angularly spaced about the axis of ele ment 12; conveniently there may be 24 serrations 37. 40 or blocks retrograde movement of arm 32. It is only when the arms 30 and 34 have been swung together sul? Fitting accurately over member 36 and rotatable thereon ciently to cause point 64 of the pawl to clear serration is a serrated adjusting ring 39 having serrations 41, on 67, as shown in FIG. 3, that the arms 30 and 34 again its forward surface, which mesh accurately with serra~ become free to be moved apart. tions 37, that is, there are 24 equally spaced serrations The arms of the tool are constantly urged apart into on the forward face of ring 39. The rear face of ring 45 tool-open position by the spring 69 acting therebetween, 39 has a plurality of equally angularly spaced serrations as shown in FIG. 1. The arms of the tool must be fully 40 thereon, such serrations differing slightly in number open to accept the largest diameter of the ferrule or other from serrations 37 and 40. Conveniently there may be part being crimped. Undue separation of the arms, should 23 serrations 40 on ring 39. The forward face of ele ment 32 is provided with a plurality of serrations 42 of 50 the arms be allowed to spring apart under the action of spring 69, is prevented by a cross-pin 70 engaging bent the same shape, serrations 42 being equal in number and tang portion 71 on the lower end of spring 69. complementary in shape to serrations 41. After ad In FIGS. 8 and 9 there are shown alternative connec justment of the parts, in the manner to be described, ele tors which may be operated upon by the embodiment of ments 32, 39, and 12 are maintained tightly together with their serrated surfaces in mesh by means of a nut 44 55 the tool shown. In FIG. 8 the contact is that shown at 52 in FIG. 2, such contact having one ferrule 72 engaging threadedly engaged with the threaded outer end of ele the end of the lead wire 73. Thus the inner, operative ment 36, and by a spring washer 45 interposed between ends 54 of the indentors 21 need have indenting surfaces nut 44 of the rear surface of element 32. In the em lying generally in one head transverse to the axis of head bodiment disclosed, spring washer 45 is laminated and in 10. In FIG. 9, on the other hand, the contact 74 has two relaxed condition is bent or dished somewhat along one ferrules, one, shown at 75 engaging the forward end of diameter. wire 76, and the second, shown at 77 being larger and The tool head 10 has a connector-locating means in clenched upon the end of the insulation 79 on the wire 76. the form of a stud 46 having the forward end thereof In forming the assembly shown in FIG. 9, the embodi provided with a forwardly open axial bore 47. Stud 46 accurately ?ts within the central axial bore 49 in member 65 ment of tool shown will have its indentors provided with two clenching zones, the rear zone clenching ferrule 75 36, and is held accurately by means of a ?ange 50 on upon the wire 76, and the forward zone clenching ferrule member 46, and a nut 51. As shown, ?ange 50 engages 77 upon the insulation 79. the end of member 36; the nut 51 has an annular rear The described construction of the tool, including the ad ?ange thereon overlying ?ange 50 and thrusting member 46 forwardly. The axial length of bore 47 in member 46’ 70 justable stop 55 and the adjusting means including ser rated ring 39 acting between arm 32 and element 12, per is such that when a contact such as that shown at 52 in mit the tool to be accurately adjusted, when necessary, FIG. 2 is placed with its operative end in engagement with to compensate for the wearing of the elements of the the inner end of bore 47, the ferrule on the contact is po indenting tool, including the outer end surfaces 22 on sitioned in the proper transverse plane axially of the head of the tool to be operated upon by the inner ends 54 of 75 the indentors 21 and cam surfaces 24 on cam housing 3,028,776 11. Preferably when the tool is thus adjusted, it is also disassembled, cleaned and lubricated. Assuming that this has been done, the tool is reassembled and adjusted as follows. The indentcrs 21 and the spring 26 are assembled in ' guide element 12, and such assembly is installed in cam 6 sembled and ready for use. The tool may be readjusted, when necessary, to compensate for wear on the indcntors, cam ring, etc., whereby to restore the tool to its initial ac curately adjusted condition. Although only one embodiment of the invention has been illustrated in the accompanying drawings and only housing 11, being retained therein by snapping the split two embodiments thereof have been described in the fore . Spring ring 19 into the cavity rearwardly of element 12. The pawl 57 and spring 6% are then mounted upon arm going speci?cation, it is to be especially understood that various changes, such as in the relative dimensions of the 32. Adjusting ring 39 is then telescoped over element 10 parts, materials used, and the like, as well as the sug 35, ring 39 being placed so that its teeth 41 mesh with gested manner of use of the apparatus of the invention, teeth 37 on the rear face of element l2. Arm 32 is now may be made therein without departing from the spirit telescoped over element 36, and is positioned so that it and scope of the invention as will now be apparent to forms an angle of about 28 °v with handle portion 29. With those sltilled in the art. W rat is claimed is: l. A tool for crimping a ferrule upon a wire, compris ing a tool head carrying a plurality of ferrule-indenting arms 2? and 32 held in such position relative to each other, the curved spring washer 45 is installed over element 36 and is held in place by the nut 44, which is tightened ?nger-tight at this time. The ‘adjustable stud tools for movement inwardly toward and outwardly away 55 is now installed, and is screwed inwardly so that its from each other, a cam means rotatable with respect to inner end lies spaced a distance of .062 to .004 inch from 20 the tool head for advancing the tools inwardly in a work arm 32 when the point 66% of pawl 57 just barely snaps ing stroke, means for drivingly rotating one of the cam past the last tooth or serration 67 on the body of cam means and the tool head with respect to the other, and housing 12. means for adjusting the angular relationship between the driven element and the driving means therefor, said last that the arm 32 can not be closed enough for the pawl 25 means comprising a ring member interposed be 57 to snap past the last tooth 57. Then, holding thev tween the driven element and the driving means, opposite tool closed, the operator slowly backs out the stud 55 sides of the ring member carrying a plurality of uniformly until the pawl 57 snaps clear of tooth 67. The adjust spaced teeth, the teeth on the two sides of the ring mem ment is checked by inserting a .904 inch feeler gauge be her being different in number, teeth on the driven ele This can best be done by ?rst adjusting stud 55 so tween the screw 55 and arm 32 and then closing the tool. 30 ment and the driving means meshing with the teeth on The pawl should not snap clear of tooth 67. The same the respective sides of the ring member, and means for operation is repeated using a .002 inch feeler gauge. ‘The holding the driving element, the ring member, and the pawl should now snap clear of tooth 67. The tool driven element together in driving relationship. should then be opened and closed several times and 2. A pliers-type tool for crimping a ferrule upon a 35 wire, comprising a circular tool head carrying a plurality rechecked to make sure that its action is consistent. After a justment of the set screw 55 is completed, a of generally oppositely disposed ferrule-indenting tools piece of masking tape is attached over the pawl 57 to prevent it from contacting the teeth 65, 66, and 67 on for movement inwardly toward and outwardly away from each other, a barrel means disposed about the periphery arm 32 while the indentors are adjusted. The indentor of the tool head and carrying cam ramps cooperating setting is now checked, and the distance between the 40 with the outer ends of the tools, the barrel means being inner ends of the indentors is measured with the tool rotatable with respect to the tool head about the axis closed. it such dimension is greater than the‘ desired thereof for advancing the tools inwardly in a working setting, nut 44 is loosened and the adjusting ring 39 is stroke, levers constituting handles connected to the tool turned one click relative to arm 32 and element 12. head and the barrel means, stop means acting between While holding ring‘??? in its new position, nut 44 is re the levers for determining the terminal positions of the tightened, after which the distance between the inner ends levers when thetools are in their innermost position, of the indentors 2:1 is checked with the tool closed. vIt ' and means for adjusting the angular relationship between will be understood that such turning of adjusting ring 39 one of the elements consisting of the barrel means and one click relative to arm 32 and element 12 will have the tool head and its respective lever, said last-named adjusted the terminal position of element 12 relative to means comprising a ring member interposed between the i cam housing 11 through an angle approximately equal to said lever and the element to which the said, lever is 39 minutes, that is, the difference between 17/24 of 360° connected, opposite sides of the ring niember'carrying and 17/23 of 360°. a plurality of uniformly spaced teeth, the teeth on the Cam surfaces 24 are so designed that when arms 39 55 two sides of the ring member being different in number, and 3d are moved one tooth in either direction of the teeth on the said element and the lever meshing with the adjusting ring the effective result is a movement of the teeth on the respective sides of the ring member, and indentors equal to .0026 inch. If, however, the distance means for holding the lever, the ring member, and the between the inner ends of the indentors, with the tool said element together in driving relationship. closed, is less than the desired dimension, nut 44- is loos ened and the arms 3% and 34 of the tool are closed and ' en opened one tooth each way on the adjusting ring 39 for each .0026 inch the distance between the inner ends of indentors is below the desired setting. When the desired setting is obtained, nut 44 is tight 65 ened to a predetermined degree as by using a torque wrench thereon. The masking tape is now removed from pawl 57, and the assembly of the tool head 10 is completed by installing the contact locator 46 and the nut 51. Handles 3t) and 34 are now attached to arms 70 29 and 32 of the tool; the tool is now completely as References Cited in the ?le of this patent UNITED STATES PATENTS 918,065 Low ________________ __ Apr. 13, 1909 1,262,621 Beacham s ___________ __ Apr. ‘16, 1918 2,086,400 2,696,747 2,753,742 Brenizer ______________ _._ July 6, 1937 Bergan __-'_ __________ __ Dec. 14, 1954 Buchanan __________ __ July 10, 1956 OTHER REFERENCES I American Machinist, pages l68—9, Jan. 22, 1931.