US 2326100 A
Description (OCR text may contain errors)
Aug; 3, 1943. F. c. LAVARACK ET AL WIRE TERMINAL Filed July 2, 1941 INVENTORS awd s M Patented Aug. 3, 1943 UNITED STATES PATENT orr es I 0 ,1
WIRE TERMINAL- 7 Frederick o. 'Lavarack, Montclair, N. 1., an i I, Edward M. Deems, ForestHills,jN. Y., assighors t0 Railroad Accessories Corporation, New York, N. Ya-a corporation of New York; a a
Application July 2, 1941, serial o. 40 0, 782 2 Claimsf (01.,173-269) This invention relates to .wire terminals'or eye lets. 7 p A primary'object of this invention is the production oia device of the class specified which will exhibit the desired characteristics of known wireterminals or eyelets and in addition will pro vide means for accurately positioning the end of the insulation of. a bared end insulating wire.
A further objector the invention i to provide a device of the type specified with the features as hereinbefore specified and in addition affording a much stronger structure in that portion where in known eyelets are most weak.
Other objects and advantages will a pear. as
the description of the particular physical embodi ment selected to illustrate thefinvention pros gresses, and the. novel features'will be particularly pointed out in the appended claims.
In describing the invention in' detail, reference will be had to the accompanying drawing and the several views thereon,-inwhich similar characters of reference designate like parts throughout the several views, and in which: 7
Figure 1 is a top plan view of an eyelet of applicants invention with the bared end of an in sulated electric conductor secured therein; Fig.- 2 is an illustration of-the device of Fig. 1 as applied 1 to a well known type of electric conducting binding post; Fig. 3 is a cross-sectional view of thede vice as shown by Fig. 1.0n the plane indicatedby the line III-III of Fig. 1, viewed in the direction 1 of the arrows at the ends ofthe line; Fig. 4 is a f cross-sectional view of the device" as shown by Fig. 3 on the plane indicated by the line IV-YIV,
viewed in the direction of the arrews. at the ends of the line; Fig. 5 is a cross-sectional viewof the.
device as. shownby Fig. 1. on the plane indicated by the line l/'-V of Fig. 1,,viewedjnthe direction of the arrows at the ends of the line; Fig. '6 is a side elevational view of the device as shown by 1 before it has been applied to the end of an insulated conductor but with a part broken away a single piece ofmaterial and may be designated V as a whole as shown in Fig. 9, by E.
x The eyelet of applicants invention comprises a single body ofconducting material, preferably copper or brass and preferably tinned. i The eyelet includes a substantially circula body I, formed with a substantially semi-circular channel 2. At one end of the channel 2 there is a throat 3.. .The throat 3 is bent into substantially a right angle providing a shoulder i.
Extending beyond'the shoulder 4 is substantially a U member 5, the curve 6 of Whichtelfjminate at the shoulder and the legs of which extend along theshoulder and substantially beyond the shoulder in a direction at aright angle because on each of opposite. sides of the throat a.
somewhat righ't angle wall extends from the throat terminating atone end I asshownby Fig. 6 somewhat adjacent to and merging with a leg -as Biof th? .U, and then proceeding by-a shallow curve toabout-one quarter of the way around the body. .I, as atabout the point 9Qwhere it merges with theouter; edge of the channel. These resistor Walls on each of opposite sides of the throat provide what is practically a: resistor to bending. Iofthe throatiin a plan substantially at a right angle to thesgeneral. plane of the channel; In practice," it, has been found'thatithis additional f eature'of construction over known wire eyelets to more clearly show the internal constructiony,
Fig. 7 is a right hand end View of the device as shown by Fig. 6; Fig. 8 is a left hand end view of the device as shown by Fig. 1 but showing by dotted lines certain parts before. compression; Fig. 9 is a perspective view of the device as shown bylFig, 6.
Wire terminals or. eyelets are eld and well known in the electrical art. l Wire eyelets of the general form of applicants eyelet are old and well known in the electrical art. Applicants eyelet is an improvement of known eyelet arrived at by observation of the action. of
known eyelets in use, andacquaintance with the defects of known eyelets and conception of a means for overcoming the more prominent defects.
The eyelet of applicants invention'is made of H is of immense advantage andof great efiic'iencyin that it"greatly prolon s the life'of the terminal in that it preventsbreaking of the terminal through thethroat 3.
Another defect ofknown terminals hasarisen .irorh the fac't'that one or more strands'of the stranded conductor when placed within the channel 2 wouldescape therefrom by reason of Y mean that the means for holding the strands in the channel metthefree edge of thclchan'nel directly In applicants construction, there is provided an annulus l 0 around the inneredge ofthe chanin applicantsconstruction jthe edge [2 of the nel and this 'annulusis provided at its fr'eeedge with a flange ii. QfThis annulus l9 and flange, I i are adapted to be compressed andsurround-a stranded conductor, as best'shown in Fig. 5, but
annulus ll passes beyond the free edge l3 of the channel and. thereby quite insures against any I face. squeezed down into-place, ifithere'fiis any surplus wire extending attire point I E 'th'atis not wantsingle strand of the conductor Working out from beneath. the. flange andbeyondthe tree edge 13 of the channellto perhaps touch an adjacent conducting binding post or terminal and so cause an undesired circuit to be formed.
In practice, an insulated conductor, as M, is
bared of its insulation for a relatively shortfdi'se tance at one end and the strandsnthereoil are di vided into substantially "two equal portions;
Then the insulating materiahisf laicl intof the curve 6 of the U with the end thereof abutting the shoulder ithereby accurately positioning it.
After being so positioned, the I'egsof the U dare and "squeezed into place, as best shown in 4,
Wrapped about the insulating material forming substantially an annulus which securely holds the conductor positions-Lit properly against the shoulder i so that, it. not ride up on-the throats and cause: detects: ,Thadivide'd ends of the conductor arepassed; one aroundone side-and the other around the'other: side andin the channelfi 5;, as best shown in Fig. ii The ends-of the two, portions are generally tWi-StEdItO gether asat S52 Theannuihsltdwiththe flange l l is then squeezed down into-place. asgshown-i'n Figure-8i by ful'l'lines; Asshowrr-by v-5,.when annulus has been so: squeezed down the end of the flange- IE and; the free encl iii of the chi-n14 nel pass one another but" notlmeetxiacc to After the annulus it and flange I iii are ed; it may be cut ofi-Z" j In order toprevenjt' any interference w'itli the squeezing down of the flangeit at th'e p o t wh re 'the errds' l 5 come together; notches, one it; inllhe flange H" and the other; H, in-thebody l, are formed to receive the bared'ends of the conductor in such-a way that they wil'ln'ot interfere with the squeezing down of the annulus no flange The electrical conductor with its endprov- I wane terminal as d'escribedn-Iay then' be placed over a binding post as 5 8 andsecurelyheId down thereon bya washer as ii and a nut Applicants have further provided against any interference with the squeezing down of the annulus: HI and flange i i-by terminating the-an} nulus and flange at a point adjacentthet'hroat' 3. This; termination is suclrthat itwould appear as? though the annuiusaand flange lrawe rbeen out away along. a plane ata right angle tothe gene ena l: plane of the body-t passing through a point just? within. the ,inner circle of thachannela ad" jiacent the threat, that is; on. plane passed through line hiat-a right angletd the sheetup on which the drawing is: made; Byouttingthe annulus and flange along the -plane'-designated; sharp: points have been avoided at the points: 22. and 23 which inthepast have been found tobe troublesome in those cases Where the flange, such as H, has been cutoff on what might be cor:-
7 What We claim as new and desire to secure by Letters. Patent. of the UnitedStates, is:
1. A single piece eyelet connector for a conducting 'wire, comprising in combination: an
electrical conducting body of general circular outline formed with a substantially semi-circular .Jchannel, a throat projectinglradially therefrom, U formed in extension of the throat, said throat on each side provided with a right angle wall extendingirom adjacent and merging with the extreme free-end of a leg of the U in a shallow curve only about the distance of the throat around to anouter edge of and merging with the channel serving as a resistor to bending of the throat in a plane substantially at a right angle to th'e gene raI-pl'ane'of the channel and means for securing an electrical conducting Wire in the said channel, the legs of said being adapted to-be wrapped fromopposite sides about the insulation of acond'uctor forming substantially a closely fittingannulusthereabout.
21A single piece eyelet connector 'for'an insulation' cover strandedelectrical conducting Wire, having the insulation removed for arelatively sliort distance at the extreme end,' comin combination: anel'ectrioalconducting body of general circular outline formed with a substantially semi ci'rcul'arolrannel', a throat projecting'radially threfrommaid throat includmg a right angle bendtherein forming a shoulder-adapted to abutthe end of insulation of a bared" conductor, said throat beyond'the shoulder being formed into a- U', the curve of which terminates at the shoulderand the legsof which extend along and substantially beyondthe shoulcler in a direction at a right angle to the general plane of the channel, said legs adapted to' be wrapped from opposite sides about the insulation of a conductor forming substantially a closely fitting annulus thereabout', said throat oneach side provided with a somewhat right angle wall extending fro nadjacen t' and merging with the extreme free end ofa leg of the U in a shallow curve about the, distance of the throat around fihfi outer edge: of and mergingwith the chang lservingas aresistor to bending'of the throat in a plane substantially at a right .angleto the general plane oi'the channel, said channel formed onitsinner edge with an annulus extending at a right angle to the general plane of the channel,
said annulus provided Witlrja fiangeat its free end,'-said flange and annulus beingv continuous except for aportion adjacent the throat end of thechanne'l where the flange and annulus are formed" as though severed. along a plane at a right angle to the general plane of the channel,
said plane being positioned just iorward of the innersurface of thechanneladj'acent the throat,
said flange and channel at a point most remote from the throat being'formed each with a notch adapted to allow protrusion or" the ends of a conductor lying in the channel, said annulus and flange'a-daptecl tabs-squeezeddown upon the end of a conductor divided andone portion passing around one side of the channelflan'd the other portion around the other sidear'rd when entirely squeezed down having the edge of the flange lying entireiy Within'the channel and its edgebelow thefree edge of the channel.-
FREDERICK C. LAVARACK. EDWARD DEEMS