Патент USA US2412566код для вставки
Dec. 17, 1946 e. w. DE BELL ETAL I 2,412,566 TURNBUCKLE FAIRING AND LOCK 'Filed’June 20, 1942 2 Sheets-Sheet l 5.1lv.l: TI L Il kl. w - INVENTOR GEORGE W. DE BELL THOMAS C. HILL Patented Dec. 17, 1946 ' 2,412,565 UNITED STATES PATENT OFFICE 2,412,566 TURNBUilKLE FAIRING AND LOCK George W. De Beil; Middle River, and ‘Thomas-C. Hili, Baltimore, Md, assignors to The Glenn‘L. Martin Company, Middle River, Md, a corpo ration of Maryland Application June 20, 1942, Serial No. 447,876 13 Claims. (Cl. 287-450) 1 2 This invention relates to turnbuckles and par ticularly to the safetying of aircraft turnbuckles which must be frequently inspected and adjusted. an aircraft turnbuckle assembly consists of a be of any external shape. The interior surfaces barrel portion. a left-hand cable terminal and a transparent plastic material when applied to air craft turnbuckles to facilitate inspection. How ever, they can be fashioned out of anyother suit right'hand cable terminal. It is usually adjusted and then looked in the adjusted position by means of safety wire. The safety wire is wrapped about of our sleeve sections can likewise be made in any desired shape. These sleeve sections are preferably made. of able material such as metal or wood. Each sleeve section is placed over its respective the parts of the assembly in a manner that will prevent the cable terminals from turning in re 10 half of a turnbuckle assembly, and after the lation to each other or the barrel portion. The turnbuckle has been adjusted to ?nal position, ultimate object of the safety wire is to prevent the sleeve sections are brought together by means the relative rotation of the turnbuckle assembly of a snap ring set in a groove extending around parts when they are subjected to strain or vi the intermeshed castellations. bration. Safetying aircraft turnbuckles with wire neces sitates the complete removal and replacement of the safetying wire each time the turnbuckle is adjusted. ‘ Turnbuckles are ordinarily provided with cable terminals having external hexagonal or like grip ping surfaces for the purposes of adjusting the turnbuckle. The inner hexagonal portions'of ‘our sleeve sections ?t over these external hexagonal Unless a mechanic skilled in the method of 20 terminal portions. sothat relative rotationiispre vented. . adjusting and wire-safetying turnbuckles is em ployed for this operation it is quite possible that the safetying wire will not be correctly wrapped Turnbuckle barrels-are usually provided with an aperture or hole near their centers through which the safetying wire is threaded. However, in the right direction about the turnbuckle as sembly and that the said asssembly will Work Na CI in our invention we’ insert a cotter pin through this hole in the turnbuckle barrel. loose when subject to the usual aircraft vibra tions and strains. - Wire-safetied turnbuckles by nature arerrough Appropriate’ slots to receive the cotter pin are provided in our transparent plastic sleeve sec tions. Thus, each of‘ the sleeve sectionstprevent cable. The aircraft industry spends countless 30 rotation between the barrel and one of‘the hex agonal-shaped cable terminal gripping surfaces hours each year designing structure wherein by its slotted engagement of the cotter pin-and cables containing “knotty” turnbuckles will not its inner hexagonal engagement of the external interfere with other like cables or the structure hexagonal cable terminal surface. Each sleeve itself, in their travels within an airplane. This disadvantage has proved most costly to aircraft 35 section therefore‘ prevents rotation between the turnbuckle barrel and the hexagonal cable ter manufacturers not only from the standpoint of surfaced assemblies not unlike knots in a rope or the expense incurred in the attempt to design a turnbuckle assembly free from such protuber minal surface which it covers. Inasmuch as our sleeve sections have smooth outer surfaces, the two sections. when locked to, ances, but also from the fact that numerous crack-ups have been traced. directly'to fouled 40 gether over a turnbuckle assembly form a smooth fairing’ cover forit. turnbuckles in the control cablesias wellas; other 'l'heprimary object of this invention is to; pro: cables; the; free movement'of'which is’ obviously vide- a smooth, transparent plastic,_ well-falred imperative. turnbuckle cover which may be used to safety We have discovered that all of the aforemen tioned undesirable features inherent in present 45 aircraft turnbuckles. Another object of the invention is to provide aircraft turnbuckle‘ practice: can‘be eliminated if a locking means for turnbuckle assemblies that a turnbuckle is safetied by means of sleeve. sec allows easy access for adjustment purposes. tions of transparent plastic'material which are :j Stillanother object of theinvention is to pro castellated at one end and have‘ hexagonal or other: suitable interior cable terminal gripping 50 vide a smoothesurfaced transparent cover-lock for turnbuckle assemblies that will‘permitinspec surfaces. at the. other end. . tion therethrough. It should be understood that the surfaces" of A further object of the invention is to provide the cable terminals need not‘ be of hexagonal a slide-on safetying cover-lock for turnbuckle shape to provide adequate‘ gripping surfaces. for the purpose of adjustment. but that they could 55 assemblies. ‘ > 2,412,566 4 3 Still another object of the invention is to pro The sleeve sections are then slid over their re vide a safetying means for aircraft turnbuckles spective parts of the turnbuckle and are brought together with their castellations meshed adjacent that will positively prevent all relative movement between the different parts of the turnbuckle assembly. the barrel portion of member 6, and with their 5 elongated slots 24 in alignment with the cotter pin 26 through the member 6. The head 21 and Further objects of the present invention will outwardly bent legs 28 of the cotter pin lie below become more apparent from the description of the the outer surface of the sleeve section or cover accompanying drawings which form a part of this and do not project outwardly thereof, and prevent disclosure and wherein like reference numbers refer to like parts. It is to be understood that‘ 10' the cover it) from rotating with respect to the barrel portion?. Sleeve sections I2 are held in certain changes, substitutions, alterations and meshed relation by means of the resilient ring 22 modi?cations may be made without departing snapped into position in the groove 20. from the spirit and scope of the appended claims. The inner hexagonal surfaces of portions I4 are In the drawings in which like reference‘nu 15 engaged with the hexagonal nut portions 8 so that merals indicate like parts: Fig. 1 is a plan view of the invention; Fig. 2 is an enlarged longitudinal cross-sec tional view of a portion of Fig. 1; Fig. 3 is a cross-sectional view along the plane indicated by the line 3--3, Fig. 2. Fig. 4 is a, cross-sectional view along the plane indicated by the line 4-4, Fig. 2; the sleeve sections cannot turn with respect to the cable terminals 2 and 4. Inasmuch as they cannot turn with respect to their cable terminals, and cannot turn with respect to barrel portion 6, it is obvious that the cover effectively locks the cable terminals 2 and 4 against turning with re~ spect to barrel portion 6 and, therefore, effec tively locks the turnbuckle assembly. Fig. 5 is a perspective view illustrating the As the cover presents a smooth exterior sur method of assembling the parts of the cover into face, no projection exists which can catch upon ‘position upon the turnbuckle. any adjacent cable or structural member. Figs. 6 to 13 'show similar views of a modi?ed The invention illustrated in Figs, 6 to 13 is a form of the invention. simpli?ed modi?cation of the aforementioned In Figs. 1, 2 and 5 the turnbuckle is composed structure in that internal hexagonal or other ir of cable terminals 2 and 4 threaded to a barrel portion 6. Each of the cable terminals 2 and 4 30 regular surfaces positioned adjacent the castel lated ends of the transparent sleeve sections, are provided with a hexagonal nut portion 8 by which are adapted to co-act with external hex means of which the cable terminals are adjusted agonal or other irregular surfaces of the barrel in the barrel portion 8 and with respect to each portion when moved into inter-meshed relation, other. This is conventional turnbuckle construc ‘ 35 are substituted for the cotter pin. tion. Turnbuckles are ordinarily provided with cable The self-locking fairing cover ID of this inven terminals having external hexagonal or like grip tion is shown covering the turnbuckle between the ping surfaces for the purpose of adjusting the nut portions 8. This cover is made in two sleeve turnbuckle. The internal hexagonal portions lo half sections I2, each of which is similar or iden tical to the other and each of which is composed 40 'cated at the outer ends of the sleeve sections ?t ‘over these external hexagonal terminal portions of a narrow cylindrical portion I4, the inner sur so that relative movement between the two ter face of which is hexagonally shaped so that it minals is prevented. closely ?ts over the nut portion 8, note Fig. 3, As shown in the drawings, the sleeve sections and an enlarged portion I 6 ‘terminating in a cas tellated end I8, the castellations of one of the - are held against movement along the longitudinal sections being complementary to the castellations in the other section. The castellated portions I8 barrel portion contacting the ?ared portion of ‘also include‘ a peripheral groove 20 which is adapted to receive a resilient snap ring 22, when the castellations are meshed with each other. The ; castellations further include a pair of diametri cally opposed elongated slots 24 which are adapted to receive the ends of a cotter pin 26. axis of the turnbuckle by means of the- central the internal hexagonal portion of the sleeve sec tions‘ . Thus it will be seen that the internal hexagonal portions of the transparent fairing and locking sleeves co-act with the corresponding external hexagonal surfaces of the turnbuckle so as to prevent relative movement between the com ponent parts of the entire unit. Referring to the drawings and more particu transparent moldable substance so that after it larly to Figure 6 thereof, the turnbuckle is com has been placed in position the turnbuckle can be posed of cable terminals I I0 and I I2 adapted to readily inspected. Any of the synthetic resins be threaded, to'a barrel portion I I4. Each of the which are transparent and are capable of being molded, and have the necessary strength are suit to cableterminals H0 and I I2 is provided with a hexagonal nut portion I I6 by means of which the able for this purpose. The free ends I3 of narrow cable terminals are adjusted in the barrel portion portion >‘I4 are rounded so they will slip byany II4 with respect to each other. This. is conven obstruction. For a similar reason the transition tional turnbuckle construction. In the present part I5 of the cover between narrow portion I4 invention, the barrel portion [I4 is further pro and wide portion I6 is formed as a gradually in vided with a hexagonal portion 1 I8; the function clined smooth surface. I of which is later to be described. ' The operation of the device is as follows: The self-locking fairing cover I20 of this inven Before the cable terminals 2 and .4 are screwed tion is shown covering the turnbuckle between the into the .barrel portion 6, a sleeve section. I2 is nut portions _II6. This cover is made in two slipped over .eachcable terminaland down the sleeve portions I22 and I24, each of which is simi cable ‘connected to each , cable terminal. The lar or identical to the other and each of which cable terminals then are screwed into the barrel has an internal hexagonally-shaped surface I25 portion 6, which has cotter pin 26 already installed and I28 respectively at each end thereof and a in hole 25 as in Fig. 2, and adjusted to ?nal posi Cover I0 may be made of metal or any other suitable material, but is preferably made of a i tion by means of the hexagonal nut portions 8. castellated portion I30 at their abutting ends, 23391568 6 5 the castellations of one of the-‘section's being com both said locking means'b'eing within the stream~ plementary to the cast'ellations-o'f the'othersec lined surface of said sleeve. 3'. In combination, a turnbuckle comprising a 'tion. The castellated portions I30" also include a peripheral groove I32 which is adapted to re ceive, when the castellations are'intermeshed, a resilient snap ring I 34. , 7 Cover I26 may be made of metal'or ‘any other suitable material; but is preferably made of a transparent substance to permit of ready inspec tion without the necessity'o'f'disassembling. Any of the synthetic resins which are transparent and capable of beingr molded, and having the neces sary strength, are suitable for this‘ purpose. ’ The pair of cable terminals having adjusting portions of polygonal cross-section, a barrelportion unit ing said cable terminals, and a. pair of transpar ent plastic sleeve portions each enclosing part of said barrel portion and part of said adjusting por tion's', said sleeve portions being separably joined together adjacent the midpoint of said‘ turn buckle, and each of said sleeve portionshaving a portion ofrits inner surface enclosing'on'e of said adjusting portions shaped to conform therewith, said sleeve portions being slotted near their joint outer'ends of the sleeve portions H2 and i215 are rounded so they will slip bv any obstruction. For 15 ure to conform'with a projection on said turn buckle barrel portion so that when engaged said a similar reason. it will likewise be noted that portions prevent the rotation of the respective the gradually inclined surfaces of the connected sleeve portions l 22'and I24 present a smooth con turnbuckle parts with each other. - 4. A turnbuckle cover-lock comprising a'pair of tour. '20 identical transparent plastic sleeve members hav The operation of the device is as follows: ing a relatively small tubular portion joined by a Before the cable terminals H0 and H2 are smoothly inclined portion to a relatively large screwed into the barrel portion H4, the sleeve tubular portion, means for locking the ends of portions I22 and !24 are slipped over each cable the said large portions to each other and to a terminal. The cable terminals are then screwed turnbuckle barrel portion, and means for locking into the barrel portion H4 and adjusted to a p'ree 25 the said small portions to the cable terminals of determined position. The sleeve portions are a turnbuckle assembly. then slid over their respective parts of the turn 5. In combination, a turnbuckle, a transparent ‘ buckle and are brought together with their castel fairing and locking cover for said turnbuckle, and lations intermeshed adjacent the hexagonal sur~~ means integral with said turnbuckle and means faces of the‘ barrel‘por'tion H4. Snap ring I34 is " integral with said fairing and locking cover for then inserted in peripheral groove 932. locking said turnbuckle and fairing and locking Therefore, as the internal hexagonal portions cover against relative rotational movement. l26 are engaged with the hexagonal nut surface 6. In combination, a, turnbuckle having a bar H6 so that the sleeve portions cannot turn with Q rel portion and cable terminals adjustably car iii respect to the cable terminals H0 and H2 and as ried by said barrel portion, a cover for said barrel the internal hexagonal portions I28 of the sleeves portion and at least a part of said cable terminals, are engaged with the external hexagonal surfaces and means integral with said cover and means H8 of the barrel portion H4 so that the sleeve integral with said turnbuckle for locking said portions cannot turn with relation to the barrel 40 cable terminals, barrel portion and cover against portion I hi, it is obvious that the cover effectively relative rotational movement. locks the component parts of the turnbuckle as 7. In combination, a turnbuckle having a bar sembly and associated fairing and locking means rel portion, cable terminals adjustably carried by from any relative movement, and this without said barrel portion, and a transparent fairing and the use of a cotter pin. It will be noted that 45 locking means covering said turnbuckle and at sleeves I22 vand I24 are held against movement least a portion of said cable terminals, said barrel along the longitudinal axis of the turnbuckle by portion and said cable terminals having an ex means of the central barrel portion ll8 contact ternal irregular cross section, said transparent ing the flared portion !28 of the sleeve portions fairing and locking means having corresponding I22 and I24. internal surfaces, said internal and external sur The term “turnbuckle” as used in this applica faces adapted to co-act to lock said barrel por tion comprehends a central barrel portion, ter tion, cable terminals and transparent fairing minals adapted to be adjustably positioned in the against relative movement. ends of the central barrel portion, and means to 8. A locking andfairing cover for a turnbuckle lock the aforementioned parts from relative move Li Li having threaded cable terminals and a central ment. barrel portion into which the threaded cable ter We claim as our invention: minals are screwed, said locking and fairing cover 1. A turnbuckle fairing cover comprising a pair comprising two parts into which the turnbuckle of transparent plastic sleeves having an interior is adapted to be positioned; the barrel portion shape complementary to the exterior shape of a and the cable terminals of the turnbuckle having turnbuckle, means for locking said sleeve portions polygonal cross-section portions, the abutting against translation with respect to each other and ends of said fairing cover being provided With means for locking said locked sleeve portions similar interlocking ends to prevent relative rota- ' against rotation with any part of the turnbuckle tional movement, the outer ends of said fairing not restrained by the complementary shape of the 65 cover being provided with internal surfaces con overlying sleeve portions, both said locking means being Within the streamlined surface of said sleeve. 2. A cover-lock for turnbuckles comprising a forming with said polygonal portions, and means for locking the abutting ends of the fairing cover against longitudinal movement. 9. A locking and fairing cover for a turnbuckle pair of sleeve sections each adapted to cover a' 70 having threaded cable terminals and a central part of a turnbuckle assembly, means for locking ‘ barrel portion into which the threaded cable said sleeve portions against translation with re-' spect to each other, and means for locking each terminals are screwed, said locking and fairing cover comprising two parts into which the turn of said sleeve sections against rotation with re buckle is adapted to be positioned; the barrel ' spect to each part of the turnbuckle assembly, portion and the cable terminals of the turnbuckle 2,412,566 7 8 having polygonal cross-section portions, the tion thereby providing therearound at each side abutting ends of said fairing cover being castel lated to prevent relative rotational movement, the outer ends of said fairing cover being pro annular shoulder; of a pair of interchangeable locking sleeves each of which is interiorly con vided with internal surfaces conforming with said polygonal portions, and means for locking the abutting ends of the fairing cover against longi tudinal movement. 10. A fairing cover for a turnbuckle, said turn of said midlength portion an outwardly facing toured to substantially ?t the outline of said turnbuckle body with their ends abutting against each other, and means locking the abutting ends of said sleeves against separation by shifting out wardly and against relative rotation, said sleeves buckle comprising threaded cable terminals and 10 each having a-polygonal interior portion, and a a central barrel portion into which the threaded terminals are screwed, said fairing cover com prising two abutting hollow members adapted to receive said turnbuckle, the barrel portion and cable terminals having polygonal cross-section’ portions, the inner surfaces of said fairing cover members adjacent said polygonal portions shaped to conform with the polygonal portions, and a ?ush locking means for securing the abutting ends of said fairing cover members together. 11. A pair of sleeves ?ttable around av turn buckle body, and means locking said sleeves against separation and against relative rotation, said sleeves each having a polygonal interior rod having an axial screwthreaded connection with each end of the turnbuckle body, each of said rods having an integral polygonal portion re ceived by said interior polygonal portion of one of said sleeves. 13. A pair of twin sleeves ?ttable around a turnbuckle body having a diametrically enlarged midlength portion thereby providing therearound at each side of said midlength portion an out wardly facing annular shoulder, and means lock ing said sleeves against separation by shifting outwardly and against relative rotation, said sleeves each having a polygonal interior portion, and a rod having an axial screwthreaded con portion, and a rod having an axial screwthreaded connection with each end of the turnbuckle body, each of said rods having an integral polygonal nection with each end of the turnbuckle body, each of said rods having an integral polygonal portion received slidably by said interior polyg onal portion of one of said sleeves, onal portion of one of said sleeves. portion received adj ustably by said interior polyg ' 12. The combination, with a turnbuckle body 30 having a diametrically enlarged midlength por GEORGE W.v DE BELL. THOMAS c. HILL.