Патент USA US2106048код для вставки
Jan. 18, 1938. A. T. CANDY, JR 2,106,048 CoDED WIRE Filed NOV. 12, 1932 2 Sheets-Shea?l l Jan. 18, 1938. A, T, CANDY, JR ' 2,106,048 CODED WIRE Filed NOV. 12, 1932 l', a "_ w _21.5. à 2 Sheets-Sheet 2 Patente .iam 19 2,106,048 38 sTAEÍs il N ` OFFÍ 2,106,048 @ODE Aibert '.l‘. Candy, Jr., @ak li’arli,- lil., assigner to Candy da Company, Enc., Chicago, iii., a. cor poration of Iliinois Application November 12, 1932, Serial No.. 642,378 2 Claims. (ci. 17a-«264i My invention relates to coded Wire, many of its aspects constituting an improvement upon my application Serial No. 593,370., filed February 16, 1932, now issued as Patent No. 1,891,501 of De cember 20, 1932. One object of my invention is to provide a series of wires for code work or the like wherein the different colors used may be confined to only a few readily distinguished colors but still pro vide for a large number of readily distinguished wires. I solve this problem preferably by the use of two color coatings-an under coating and the system, the speed with which special orders may be turned out, the freeing of factory pro duction from interruption by small special or ders, and the reduction in stocks which need be carried on hand to provide prompt delivery on the less common requirements. Another feature of 4my invention is the im proved method and apparatus for coating wire, which is peculiarly Well adapted for the coating 10 system of my invention. Another feature of my invention is a coded wire and the method and apparatus for coating it, wherein the wire instead of being` given an an outer coating of different colors and in dif ferent combinations. The under coating may all over outer coating, is given longitudinal 15 stripes of contrasting color. 15 normally be entirely covered by the outer coat The foregoing, together with further objects, ing, in which case, to identify a given wire, the features and advantages of my invention are set workman may scrape off a small spot of the outer forth in the following description of specific em coating to reveal the color of the under coat ing. If eight different colors are employed, this ` bodiments thereof, wherein: Fig. 1 is an elevation of a length of wire coded 20 20 gives a total of sixty-four different combina according to the preferred form of my invention tions. If a third color coat is used giving com binations of three colors, the total number of and shown with successive layers removed to dis distinguishable Wires in the series is increased close the construction; Fig. 2" is a view of a length of cable compris to some five-hundred. ing wires._ similar to that shown in Fig. 1, the 25 I prefer to employ color coatings of a wax 25 like material which is opaque but a very thin wires in one end of the cable being splayed out film.V This permits the scraping away of the into a flat.> side-by-side relation to show by outermost coat to reveal the color of the under legends their several color combinations, the outer coating being shown as removed from the coat without perceptibly lessening the effective tip of each wire for the purpose of illustrating ness of the insulation >or weatherproofing. Many prior attempts to code wire by color have had the color combination of the Wire; Fig. 3 is a view of a wire similar to Fig. 1 but the objection that the effectiveness of the insu showing a modified form of my invention where lating and Weatherprooñng had to be greatly im paired in order to determine the identity of the the outer layer of contrasting color is applied as a pair of spaced longitudinal streaks; 35 Wire. While this was not particularly objection Fig. 4 is a cross section of the wire of Fig. 3 able at the ends of a cable, it was highly objec tionable in identifying a wire at some mid point of a cable where it was proposed to tap into the circuit of the wire. To cut into the weather 40 prooilng or insulation Yof a wire to determine its identity only to discover it was not the desired Wire, left the wire in a defective condition. Another advantage of my wire coating is that it permits a wire warehouse to fill special orders 45 for the more complex color-combinations by put ting an additional coating on wire already made up and in stock. Thus a request for small quan tities of red over blue, yellow over blue and black over blue could readily be filled by taking blue ‘0 coatedwire from stock and running it through' applicators to apply the necessary outer_coating. Methods of coding heretofore in use have re quired that the wire be built initially to the ultimate requirements. A -valuable advantage ` of my invention therefore is the adaptability of but on an enlarged scale; Fig. 5` is a somewhat diagrammatic longitudi nal vertical section through an applicator for applying the coatings of the-wire; Fig. 6 is a cross section of the applicator of Fig. 5 when adapted to apply the outer coating to the wire of Fig. 1; and Fig. 'I is a similar cross section view showing the cross section of the applicator when adapted to apply the outer streak to the wire of Fig. 3. The wire shown 1n Fig. l (which happens to be wire No. 22 of Fig. 2) comprises a copper conductor 25, insulation 2B, fabric braid 21, im pregnation 28, under coating 29_ and outer coat 50 ing 30.“ The superficial film of colored parañin usual on wire of this general type may be dis pensed with, if, as I prefer, the coatings be made of a composition having sumcient wax-like in gredient to present a non-sticky and somewhat 55 2 2,106,048 slippery surface. The Wire-_except for the fact it has two color coatings-may be the same as, and made by the same method and apparatus as, disclosed in detail in my before-mentioned patent. Brieily described, the assembled conduc tor, rubber insulation and braid is first dipped in a composition which may consist of stearin pitch, resin or synthetic resin, paraffin or other waxes and ñller which impregnates and coats the braid. After the impregnation has set, the wire is then passed through a coating applicator having its discharge die heated above the melting point of the composition, which deposits a coating of a composition which may be the same as the coat 15 ing composition except that it contains color 25 pigment. If desired, the coating 29 may be omitted and the pigment added to the composi tion of the impregnation 28, although in practice I prefer to use the separate thin coating 29 of opaque material because the cost of the lessened amount of pigment used more than offsets the cost of the additional process. After the coating 29 has set, the wire is again passed through an applicator which applies the thin outer coating 30 in a similar manner. The outer coating 30 may be the same as the under coating 29 except that it is of different color. The wire No. 22 (Fig. l) when used may be combined with similar wires of diiîerent color 30 combinations into associated groups or into a formal cable 3l of the type customarily used in automatic elevator installations. In addition to the usual tensile wires 32 which are not conduc~ tors, the cable 3l as here shown comprises a group of twenty-four wires consecutively num bered in Fig. 2. Each of these has a different color combination as shown by the legends and as indicated by the lining on the wires. It will be observed that white over black and black over white, for example, are two different combina tions (or »more accurately permutations). In practice blacliI over black, white over white, red over red, etc. would be. indistinguishable from a single coating of black, white, red or the likn In such instances the wire having but a single naating of that color could be substituted in the code scheme. In practice, also, it may be preferable to em ploy single colors for the ñrst few, or most fre quently used, wires, employing color combina tions only after the single color possibilities are exhausted. While in the illustration shown I have shown the use ñrst of black over each oi the several colors, then white over each of the several colors, then red over each of the several colors, etc., I appreciate that in many instances it will be preferable to employ iirst each of the several colors over black, then each of the sev eral colors over white, then each of the several colors over red, etc. In the latter instance the orders could be iilled from a warehouse having a stock on hand of only two or three colors of single coated wire, over which the necessary ad ditional color coatings could be applied to lill the order. It is very desirable that where coatings are applied for the purpose of color primarily, they shall be as thin as possible. the 70 the reel son One reason is that color pigments are relatively expensive and amount of colored composition applied per of wire should be a minimum. Another rea is that it is advantageous to keep the over all diameter of the various wires the same so that wires with two color coatings will be of 75 substantially the .same over-all diameter as those having only one. In fact it is a feature of the method and apparatus here shown for apply ing the outer coatings that the outer coating can be applied without sensibly increasing the over-all diameter of the wire with only the under coating. The applicator shown in Figs. 5 and 6 is gen erally similar to that disclosed in my previously mentioned pending application to which ref erence is made for a more detailed discussion. Referring to Fig. 5, the applicator comprises a block halved into upper and lower parts 33 and 34 held together by cap screws 35 and hav ing mating channels constituting a longitudinal opening 36 of rectangular section extending from end to end. One end of the opening 36 is closed by a plug 37 having a bore 38. The wire to be coated is positioned by sheaves not shown to coincide with the axis of the anterior bore 38. The opposite end of the opening 36 is closed by a plug 39 having a bore 40 constituting a discharge die. The cavity formed within the opening 35 between the plugs 3l and 39 is ñlled with the melted coating composition 4l (except for an air pocket which may incidentally be trapped _ at the top). Melted liquid composition is fed to the applicator from an upper reservoir or melting hopper (not shown) through a valved feed pipe 42. The applicator is heated by a plurality of car- Il tridge-like electric heaters 43. Some of these are preferably placed adjacent the discharge plug 39 to insure that the bore 40 of the discharge die is kept heated to a temperature about the melting point of the composition despite the coole ' ing effect of the relatively cold wire passing through the applicator. I1" desired an auxiliary plug or sleeve 44 may be inserted in the opening 36 in> abutment with the discharge plug 39 fur ther to increase the heat conductivity to the dis charge bore and prevent eddy currents adjacent the inner end of the discharge bore so that the friction of the wire on the melted composition within the larger bore of the auxiliary sleeve 44 tends to crowd the material against the belled or chamfered mouth of the discharge bore to in sure a continuous flow of liquid thereinto. The'anterior bore 38 is of such diameter rela tive to the on-coming wire that it presents no undue friction or scraping thereof but still is i, suil‘iciently snug ñt so that the liquid composi tion, under its head pressure from the reservoir, will be checked by the friction between compo sition and the wire to prevent the composition from ilowing out the anterior bore when wire is passing through it. The diameter of the discharge bore 40 may be that of the incoming wire plus the coating to be deposited on it, as in my previously mentioned application; but I find it is also possible, and in many respects preferable, to make the discharge bore 4D the same diameter as the incoming wire. In that event it is preferable to make the bore shorter than disclosed in my prior application. As the wire is pulled rapidly through the ap~ plicator in the direction indicated by the arrows it enters the applicator through the anterior bore 38 at substantially room temperature. As this is considerably below the melting point of the composition 4|, the latter tends progressively to congeal upon the wire. The wire passes through 70 the applicator so rapidly that only a very thin layer is congealed. The hot discharge bore 40 insures that the outermost layer of the compo~ sition is melted and therefore of such liquidity 75 C) .. 2,106,048 3 that it lubricates the passage of the wire through tions of the under coating. It will be understood in Figs. 1, 3 and 4A the thicknesses of the the discharge bore and prevents the accumula vthat coatings have been considerably exaggerated for tion of any deposits on the surface of the bore. The thin fllm of the melted coating material l0 clarity of the drawings. In Fig. '7 I have shown a cross section of the CII is deiinitely drawn into the discharge bore 40 be applicator somewhat similar to Fig. 6 but show tween the wire and the bore. The thickness of ing only so much of the block halves 33 and 34 as this ñlm is not added to the radius of the re lie adjacent the opening 36. This figure shows sulting Wire but is absorbed by the material of the wire assembly. This is chiefly by the impres sion of the braid into the rubber insulation'. Thus the emerging wire as soon as the liquid coating has set after it leaves the hot discharge bore 40, is of the same diameter as the incoming wire. To a certain extent, depending upon the characteristics of the rubber insulation and of the braid, the diameter of the discharge bore 40 may be even less than. that of the incoming wire, although ordinarily it is of no object to have it less except it may be necessary to offset the tend ency of the Wire assembly to come back, after' compression, toward its normal size. The reason why I can with my applicator coat a very thin ñlm of wax-like material on to a wire having a surface of wax-like material of the same characteristics in the form of a prior coat ing or impregnation, without remelting the lat ter or causing it to run with the coating being applied, is this: The incoming wire is of room Here a pair of diametrically opposed longitu dinal members 45 afford cylindrical surfaces of 90° arcuate cross section extending from the mouth of the anterior plug 31 tothe opposite end of the discharge plug 39 and in contact with the surface of the wire to prevent the liquid coat-_ ing composition being applied, from coming in contact with certain arcuate portions of the wire. Thus the coating material is applied only to those regions of the wire which are not thus masked out by the members 45. This results in the streak like coatings 30’ of Figs. 3 and 4. The applied streak coating 30’ Will be imbedded or compressed into the wire assembly for the same reason, as previously described, that the compression die applies a coating without enlarging the diameter of the Wire. As in my previously mentioned application, the temperature and therefore relatively cool.4 The The melted coat ing composition is a poor conductor of heat. The wire is passing through the body of melted com applicator is set at an inclination as shown in Fig. 5 so that after the Wire emerges from the _ position very rapidly. The mass of the Wire es pecially near its surface absorbs such heat as is guiding means which might otherwise impair the slick finish. 30 wire has considerable mass. conducted through the film of melted material in surface contact with the wire before the previous coating or impregnation may be heated up to the melting point. Even when passing through the restricting hot discharge die 40', it is only the coating material adjacent the very surface of 40 the bore which is kept melted. Also there are no factors tending to mix the outer coating with the inner coating within that Short interval of time even though the under coating should be come plastic or even melted. My coating apparatus and method is applica ble to an impregnation as Well as a coating, but applicator it may pass downwardly through the surface ofV a body of cooling Water and thereby I claim: l. The method of coding and identifying indi vidual conductors of a group of similar insulated electric conductors which consists in providing each individual conductor with a colored under 40 coating externally of the insulation and an outer coating of a different color, some of the conduc tors having outer coatings of the same color and inner coatings of different colors, assembling the conductors in a group and scraping off regions 45 of the exposed coatings to reveal the color of the under coatings without substantially impair ing the insulation of the conductor as a whole at similar material. bling into a group individually insulated elec tric conductors, each provided with a colored un der coating externally of the insulation and an outer coating of a different color, some of the conductors having outer coatings of different co1 ors and under coatings of different colors,'and including the under coating 29'. The outer coating 30', however, is not applied about the entire area of the wire but only as one orl more spaced longitudinal streaks. This has the ad vantage of a ready identiñcaton of the Wire with out having to remove any 'of the outer coating. As shown in the cross section of ~Fig. 4, the outer coating 30' is preferably impressed into the sur face of the wire so that its surface is at-the same radius as the surface of the exposed por . be set before touching a sheave or any other the benefits, as previously pointed out, are more marked in the solution of the problem of apply ing a very thin coating and especially to a wire which already has an impregnation or coating of In Figs. 3 and 4 I have shown a modified form of my invention, The wire is the same up to and c.: LI the cross section of the device of Fig. 4 as it is modified to produce the wire of Figs. 3 and 4. 10 such regions. ` . 2. The method of coding and identifying in 50 dividual conductors of a group of similarly insu lated electric conductors which consists in assem- , scraping off regions of the exposed coatings to reveal the color of the under coatings without 60 substantially impairing the insulation of the con ductors as a whole at such regions. ALBERT "r. CANDY, Jn.