Патент USA US2137450код для вставки
Nov. 22; 1938.- vA. ALGREEN 2,137,450 ANTENNA FAIR LEAD Filed April 7, 1937 INVENTOR. A/ZEI’]A. ?regn . B‘m- 1% M ATTORNEY H Patented Nov. 22, 1938 2,131,450», PATENT OFFIcE - UNITED 213745931" ‘ _ 3 ‘a ANTENNA’ FAlReLEAD? " ‘ Albert A} ‘Green, Bridgeport," Conn; assignor'to United Aircraft Corporation, i East ’ Hartford, Conn., a corporationof Delaware \ Application ‘April 7, 1937;‘SerialN0a135A70 ‘ 8 Claims. This invention relates to improvements in an tenna fairleads and has for an object the'pro vision of an improved means for‘guiding a radio antenna into and out of the fuselage or hull of ‘ ‘ an airplane. ‘A further-object resides in‘the provision in- an improved antenna fairlead of the character speci?ed including means extendible beyond the‘ surface of the hull or fuselage to‘prevent the antenna from contacting the surface of the hull or fuselage while the antenna is being reeled into or out of the body of the‘airplane. ‘ ‘A still further object resides‘ in the provision ina ?ying boat of an improved guide means'for akradio antenna, said guide‘ means having a‘ water tight connection with the skin‘ or cover portion of the boat hull and extending above the Water line when the boat is at rest on the water. An additional object resides in the provision‘ 20 of an improved antenna fairlead which will effec-. tively insulate the antenna from the portion‘ of the boat through which the antenna'passeswhen it is extended to operative position. ' 1 o ‘Other objects and ‘advantages will“ be‘ more 25 ‘particularly pointed out hereinafter or will be come apparent as the‘description proceeds. In the accompanying drawing in which like reference numerals are used to‘designate similar parts‘throughout, there is illustrated a- suitable 30 mechanical embodiment of What is now con sidered to be‘the preferred form of the‘idea of the invention. The drawing,.however, is for the purpose of illustration only and is not to be taken as limiting the invention, the scope’ of _ which is to be measured entirely by the‘scope of Y' the appended claims. In the accompanying drawing, ‘ i Fig. 1 is a transverse sectional view of‘ a fragmentary portion of an airplane fuselage‘ or hull 40 showing an improved antenna fairlead ‘ con (oiliiii-n " " compartment and with a separatecontrol com partment‘providing‘space for‘the pilots, ‘navi gato-r,'-1nechanic and radio operator. As armat terlof convenience,‘ the ‘radio antenna is located near the radio- operator and projects through thebottom ‘of the hull of the ?ying boat at a location at‘the rear ‘of the control compartment, asiis‘ clearly illustrated in Fig. 2. It ‘is to be un derstood, however, that this location-is by Way of exempli?cation only and that the antenna may lead through any portion of the boat in which‘ its location would be desirable or con venientm ‘ ~ _ - " In the form‘ of the invention illustrated? the hull‘isprovidedl at the' rear of the‘control com partment‘withw'a transverse bulkhead vl2 secured‘ to a bottom frame M'to ‘which is securedthe hull skin or cover l6. , I ‘ An3 antenna reelgenerally indicated at [8 is mounted upon the bulkhead I2 within convenient reach of the radio operator and from this‘reel the antenna 20 extends through an aperture 22 provided in the bottom portion of the hull. - Between the aperture 22 ‘and the reel I8, there is provided an antenna fairlead or antenna guide 25 generally indicated at 24.‘ The'antenna fairlead 24 comprises‘ an outer tubular‘ memberLZG secured at its lower end to the‘ upper end of a ?ared or frustro-conical member 28 by suitable means such ‘as the screw threaded union 30. l The lower end ‘of the ?ared member 28‘ is‘disposed at an angle to‘ the longi tudinal axis of the member and is provided with an annular ‘?ange 32 which overlies a portion of the cover or skin I6 surrounding the aper ture 22. Preferably a gasket is disposed be tween the adjacent surfaces of the ?ange and the‘cover‘m‘ember and the ?ange is‘securely at tached‘to the cover member by suitable means structed according to the idea“ of this invention applied thereto, such portion of the fairlead be such ‘asjthe screws 34 to provide a water-tight connection between the lower end of the mem ing broken away to better illustrate the cone ber 28 and the'skin of the hull of the ?ying struction thereof. ‘ ' - _ x i 1, ‘Fig. 2 is a side elevational view‘ofvone form of airplane to which the antenna fairlead may be‘applied and illustrates one ‘practical position of the antenna with relation to the body of the airplane. ‘ a n p - ‘ Referring to the drawing‘in detail,‘ the nu meral l0 generally indicates an airplane hull or fuselage. In the ‘illustrative construction‘ shown, the numeral ,H) indicates the hull of a passenger-carrying ?ying boat. The type of ?y?-L ; 3 ing boat illustrated is provided with a passenger: 15 boat.‘ The union 3!) provides a water-tight con? nectionube‘tween the lower end ‘of the tubular member; 26‘ and the upperend of the member 28 and the‘upper end of the‘ tubular‘ member 26 extendsabove the water line when the boat’ is at rest in the water. The guide member addi tionally comprises an inner tubular member 36 slidably mounted in the ‘outer tubular member 26 and;,insulated therefrom by the annular in sulating=members 38 and 40 disposed Within the» opposite end ofthe tubular member 26, and a locking member 42 for‘ restraining the inner 2,137,450 2 tubular member against movement with respect to the outer tubular member. The lower end of the inner tubular member 36 is provided with an annular ?are 44 within which is seated a gasket 46 for receiving the pointed upper end of the antenna weights 48. The inner tube 36 is resiliently urged downward ly with respect to the outer tube 26 by means of a coiled ‘compression spring 50" surrounding a portion ofv the inner tube and acting between the upper insulating member 40 secured to the upper. end of the outer tube and a collar 52 secured antenna guide projects materially beyond the ?ush surface of the hull cover l6 and that when the antenna is extended the weighted end there of is guided ?rmly and smoothly through the aperture 22 to the exterior of the hull and to such a distance below the hull surface that the weight 48 is entirely free of the hull and will not slap against the surface of the hull as the antenna is released. It will also be observed that the antenna is completely insulated from all portions 10 of the hull. While there has been illustrated and described a particular constructional form of the idea of upon the inner tube 36 within the tube 26. , The lock member 42 is a partly cylindrical the invention, it is to be understood that the in member rigidly secured at its lower end to the vention ‘is not limited to the construction so insulating member 40 and insulated from the illustrated and described, but that such changes in the size, shape, material and arrangement of outer tube member 26. This member extends up wardly above the upper end of the outer‘ tube parts; may be resorted to as come within the scope of the appended claims. 26 and is provided at its upper end with a lock 20 20 ing slot 54 adapted to receive a handle 56 se cured to the upperend of the inner tube 36» so that by rotating‘ the inner tube 36 the handle 56 may be brought within the, slot 54‘ and retain the inner member in its uppermost position against 25 the. action of the spring 50. If desired, the ends of the spring 50¢ may be attached to the tubes 36 and 26 in such a manner that torsional action of the spring will automatically insert the handle 5.6, into the slot 54 when the antenna is fully 301 retracted. , > ~ , , y The antenna reel I6 is shown as provided with a winding. knob 58 although it may be motor driven, if desired, and is also provided with a locking lever 60 so that-it may be locked to re _ tain. the antenna in its fully retracted position as illustrated in full lines in Fig.. 1 or at any desired amount of;extension from the hull or fuselage of the airplane. f _ When’ it-is desired to extend the antenna from its fully retracted position, the reel lock is dis engaged by the member 60, the handle 56 is dis engaged from the slot 54 and rotated out of- the slot 54 and the antenna reeled out of the air plane. As the antenna moves. out of the airplane, the inner tube 36 follows the weight 48v down wardly until the lower end of the tube projects below the bottom surface of the hull, as is par ticularly ‘illustrated in broken lines on Fig. 1._ In its extended position,.the inner tube 36 prevents. the antenna. weight 48 from slapping. against. the‘ sides or bottom of the hull under the. actionv of the air stream flowing, past the hull‘ and insures that the antenna will fall freely from the airplane without interfering with the hull. or becoming, _ entangled. When the anienna is reeled in, the upper end of the weight 48‘ contacts the. lower end of the extended inner tube member 36 and the force of. the spring 50 causes. the tube. member to. sup port. the weight 48 against movement. under the influence of the air stream as it is drawn into the interior of .the weight receiving, member 28. After the antenna has been drawn completely within the airplane and the reel i6‘ locked" to re tain it in such retracted position, the handle '56‘ may be moved into the slot 54 to‘ remove the force of the spring 56 from the antenna and the‘ reel. A certain amount of tension, however, is main tained upon the antenna so that the-upper end of the weight 48 is retained in contact with the gasket 46 to provide a water-tight joint between the. weight and‘ the lower end. of'the- inner tube member 36. From an inspection of Fig. 1, it will be observed that when the antenna is. fully retracted, no. portion. of. .the antenna. Ora-the: Having now described the invention so that others skilled in the art may clearly understand the: same what it is desired to secure by Letters Patent. is as follows. What is claimed is: 1. In combination with an airplane and a radio 25 antenna extendible through a portion of the sur face of said airplane, and provided with a weight at the end thereof, guide means for said antenna providing a water-tight connection between said guide. means and the surface of said airplane, and 30 means providing a water-tight connection be tween said guide means and said weight. 2. In combination with an airplane and a radio antenna- extendiblethrough a portion of the sur,-_ face of said airplane, means for guiding the end of said antenna through said surface to a posi-< tion in which said end is clear of said surface during the extension of said antenna, a spring for urging said guide means to extended position and means for removing the force of said spring 404 from the tension on said antenna when said antenna is fully retracted. 3. In combination with an airplane and a radio antenna extendible-through a portion of the sur face ‘of said airplane, means for guiding said antenna. through the surface of said airplane comprising an outer tubular member sealed at its lower end to the cover of said airplane, an inner tubular member, within said outer tubular member and a spring for projecting said inner member to position its outer end beyond the sur face of. said airplane when said antenna is ex tended. 4. In combination with an airplane and a radio antenna extendible through a portion of the sur 55 face of said airplane, means for guiding said antenna comprising. an outer tubular member sealed at. one. end to the. cover of said airplane, and an inner tubular member within said outer tubular member and insulated therefrom, resil 60 ient' means for urging said inner tubular member to. a position in which its. outer end is projected beyond the surface of said airplane, and means for locking said inner tubular member in its restricted position against the force of said resil 65 ient. means. 5. In combination with an airplane and a radio antenna extendible through a portion of the sur face of said airplane, means for guiding said antenna comprising an outer tubular member 70 sealed at oneend to the cover of said airplane, an inner tubular member within said outer tubu lar member and insulated therefrom, and a spring for projecting said inner tubular member to a position. in which its outer end projects beyond 2,137,450 the surface of said airplane, said inner tubular member being provided with a flare at its outer end, and a gasket in said ?are for receiving said antenna weight. 6. In combination with an airplane and a radio antenna extendible through a portion of the sur face of said airplane and a Weight for the end of said antenna, guide means for said antenna comprising a tapered member sealed to the cover 10 of said airplane and providing a receptacle for said weight, an outer tubular member secured to the outer end of said tapered member, an inner tubular member within said outer tubular mem ber and insulated therefrom and a spring for 15 projecting said inner tubular member to a posi tion extending through said tapered member to the exterior of said airplane. 7. In combination with an airplane, a radio antenna extendible through a portion of the sur 20 face of said airplane, and an end weight for said antenna, a receptacle within said airplane for 3 said end weight, an insulated antenna guide hav ing an operative position with its outer end at the inner end of said receptacle, and means operative upon unreeling of said antenna to project the outer end of said guide means out wardly to carry said weight clear of the surface of said airplane and hold said antenna out of con tact with said surface. . 8. In combination with a vehicle hull, and a weighted line extendible through an aperture in 10 the lower portion of said hull, a tubular recepta cle secured to said hull surrounding said aperture and projecting upwardly in the interior of said hull to a position above the water line, a movable guide tube in said receptacle surrounding said 15 line, means resiliently urging said guide tube to a position in which it projects beyond the outer surface of said hull to maintain said line clear of said hull surface, and means electrically insu lating said guide tube from said receptacle. 20 ALBERT A. GREEN.