Патент USA US2405263код для вставки
5, E946. ‘ - ‘ R} M. LYNN BOMB . 2,405,263 SIGHT ‘ Filed Feb. 2, 1944 . -2 Sheets-Sheet 1 IN VEN TOR. BY' % JTTK Aug. 6, 146, R. M. LYJNN 2,405,263 ' Y _BOMB SIGIV‘IT Filed Feb. 2, 1944 2 Sheets-Sheet ,2 Patented Aug. 6, 1946 2,405,263 UNITED STATES PATENT OFFlCgEj ‘ BOMB SIGHT Robert M. Lynn, Pasadena, Calif., assignor of twenty-?ve per cent to Clarence ‘J. Harasta, twenty-?ve per- cent to Julia M. Lynn, and ' twenty-?ve per cent to Mildred A. Harasta Application February 2, 1944, Serial No. 520,722 ' 3 Claims. (01. ss_2.4)' 1 2 My invention relates to a bomb sight, par Fig. 8 is a front elevational View of the cam ticularly designed for the orientation of bomb ing aircraft with respect to targets and for bringing about accurate control for the release of bombs and this invention is an improvement on the gun sight forming the subject matter of ring with a, part broken away. ‘ _ Referring by numerals to the‘accompanying drawings which illustrate a preferred embodi ment of my invention, Ill designates an elbow shaped housing containing in its lower‘ portion, my co-pending application ?led September 15, an electric lamp H, above which is a lens as sembly or collimator and reticle (not shown). A base or mounting ring l2 surrounds and is The principal objects of my invention are to generally improve upon and simplify the con 10 detachably secured to the lower portion of the vertical leg of housing ii! and this base is mount struction of the existing forms of similar in ed on a suitable ?xed support so that said ver struments, to provide a bombsight based on the 1943, Serial No. 502,414. , collimating re?ex light principle, of compact tical leg normally occupies an upright position. Mounted for rotary adjustment on that por lightweight structure and which may be easily and quickly adjusted so as to provide maximum 15 tion of housing In which extends above ring I2 is a sleeve [3 with the upper end of which is. formed accuracy of sighting as the equipped craft ap integral a depending wall It which is spaced proaches a target. apart from sleeve. Formed integral with the rear A further object of my invention is, to provide portions of. the sides of said sleeve and wall, are an instrument of the character referred to which, while primarily designed for use as a bombing 20 rearwardly projecting "shoulders IS, the sides of which are inset from the periphery of depending sight may also be advantageously employed for wall I4 thereby providing narrownotches It. the sighting of aircraft‘ guns. Secured to the rear-ends of shoulders l5 are A further object of my invention is to provide ears I‘! which project up-wardfrom the ends of a bomb sight with a re?ector and associated a transverse frame [8, the latter being spaced means for adjusting the angular position of said apart from sleeve l3 and formed in the end por re?ector and thereby change its axis in relation tions of, said frame are vertically disposed aper to the sight line or optical axis, thus achieving tures l9. -' ' accuracy of results in bombing operations. Projecting upward from the parallel arms 26 A further object of my invention is to provide of a substantially ‘C-shaped frame 2|, are brack a bomb sight which may be conveniently asso ets 22, to which are detachably secured the lower ciated with any conventional lighting system, or side portions of an inclined transparent re?ector arrangement, such as an electric lamp, or re 23, and thus said re?ector is disposed directly ?ector, a collimator and a reticle. above the upright portion of housing l3 and the With the foregoing and other objects in view, my invention consists in certain novel features of 35 lenses, reticle and source of light therein, Arms 20 of frame 2| are positioned in notches construction and arrangement of parts which I6 and screws 24 which pass through the ends will be hereinafter more fully described and of said arms and are seated in ring. 13, provide claimed and illustrated in the accompanying a horizontal axis for the reflector carrying drawings in which: _ Fig. l is a plan View of my improved bomb Mounted for rota-tion on sleeve 13 is'a ring 25, sight. the upper portion of which projects a short dis Fig. 2 is a side elevation. tance upwardly between wall I4 and said sleeve Fig. 3 is a vertical section taken approximate and formed on the upper end of said ring is a ly on the line 3—3 of Fig. 1. cam 26 which extends approximately 360 de Fig. 4 is a plan view of the ring frame which grees around ring 25. (See Figs. 7 and 8.) provides a support for the tilting re?ector car Formed on top of ring 25 inwardly from the rying member. ends of cam 26, is a short double ended cam 21 Fig. 5 is a plan View of the tilting re?ector provided with a centrally disposed notch 28. carrying frame. That portion of the external face of ring 25 Fig. 6 is a view looking against the under side 50 just below cams 26 and 21 is provided with suit of the central portion of the re?ector carrying able markings to form a graduated scale 28 and frame and showing the resilient cam engaging that portion of the face of the ring below said ?ngers. scale is knurled as designated by 29 to facilitate Fig. 7 is a plan view of the cam ring with a por 65 manual rotation of said ring. tion thereof broken away. frame2l. ‘ ' » V 2,405,263 3 4 Ring 25 is retained on sleeve |3 by a ring 39 screw seated on said sleeve below said ring 25 and this retaining ring 30 is secured to said sleeve Accuracy of adjustment of the re?ector may be attained through the use of the graduated scale 28 and a cooperating guiding ?nger or mark 28a on the outer face of wall I4. Thus the re?ector adjusted to the speed and by one or more set screws 3|. Suitably secured to the under face of the cen tral portion of frame 2| are the rear ends of plates 32, of thin metal, the free forward ends of which tend to‘ ?ex‘ downwardly and the de?e'cr tion of these plates is controlled by screws 33 which are seated in frame 2| above said plates and said screws are provided with lock nuts 36:: The forward end of one of the plates 32 is pro - ' vided with a depending lug 35 which rides on ~ . cam 26 and the forward end, of the other plate terminates in a short ?nger 36 which is adapted usv elevation of the equipped craft enables bombs to bereleased at the proper instant to insure max :imum accuracy of hits'on the target or objec tive, the images of which appear in the center of the image of the reticle seen on the re?ector. "Thus it will be seen that I have provided a bomb sight which is simple in structure, inexpen sive of manufacture and very effective in per forming the functions for which it is intended. It will be understood that minor changes in the size,,form and construction of the various to ride on cam 21 and to engage in notch,28.' " Finger 36 normally occupies a horizontal plane , 7 forms of my improved bomb sight may be made slightly above the surface of cam 26. and substituted for those herein shown and de Formed in wall I 4 is an aperture 31 through‘ scribed without departing from the spirit of the which the lug 35 and ?nger 36 project for en 20 invention, the scope of which is set forth in the gagement with the respective cams. . . appended claims. The upper portion of retractile springs .38‘ oo _I claim as my invention: cupy apertures 39 in frame 2| with the , upper 1. In a bomb sight wherein a vertical housing ends of said springs suitably secured to said frame contains a light source, reticle and collimator and the lower portions of said springs occupy 25 for producing a beam of light directed outwardly and are secured with the apertures IS in‘ frame l8. from said housing, and wherein a transparent‘ The tension of plates 32 is greater than that of reflector is angularly positioned over said beam springs 30 so that said plates 32 normally exert of light, the combination of a device for tilting upward pressure on the rear portion of frame 2|, said re?ector, comprising: a sleeve journaled on thereby tending to rock. same on its axis (the 30 said housing, an axially directed cam on said screws 24) and swing the re?ector 23 forwardly. sleeve; a bracket supporting said re?ector on The spring action of plates 32 allows foradjust said housing, said bracket including a follower ment but otherwise they do 1 not function as and means for urging said follower against said springs. j , ' I . 1 ' cam, whereby the angular position of said re The relation between camsand plates 32 is such ?ector varies in accordance with the circumfer that when ?nger36 is positionedin notch 28 ential displacement of said sleeve on said hous (the gunnery. position), the re?ector is disposed > ing. at an angle of approximately45 degrees relative 2. A combination as set forth in claim 1 Where to the light line of. the instrument. . ' '. in a pair of axial cams are provided on said When the instrumentis installed on the air 40 sleeve, and a pair of followers coact respectively craft, it is mountedon a ?xed support with base with said cams, one of said cams de?ning a helix, I2 parallel .withthe longitudinal (fore and aft) the other located at the completion of the con axis of the plane. and with ?ngers 36 in notch volution of said helix and being substantially 28, re?ector 23 is maintainedin proper position M-shaped and forming a notch to locate said relative to, the direction of ?re from‘ the guns. 45 reflector in a predetermined angular relation with In sighting during gunnery the operator looks said housing and light beam. through the re?ector from which the image of 3. In a bomb sight wherein a vertical housing the reticle is re?ected and when the plane is containsa light source, reticle and collimator guided so as to bring the target into theicircle for producing a beam of light directed outwardly appearing ‘on the re?ector, with the dot: of the from said housing, and wherein a transparent reticle on said target, the gun or guns are ?red. re?ector is angularly positioned over said beam with maximum chances of scoring a hit, due It!) of light, the combination of a device for tilting accuracy of sighting. _ In bombing operations, it is necessary to change the angularity of the re?ector with respect to the optical axis and this is accomplished by rotat ing ring 25 invone direction or the other, so that lug 35 riding on cam 26,‘will raise or lower depending on- the direction of movement of ‘the said re?ector, comprising: a bracket pivotally mounting said re?ector on said housing; a pair of levers extending from said bracket; means for adjusting the angular relationships of said levers relative to each other and said bracket; 2. pair of cams incorporated in said sleeve and engageable respectively by said levers; means ring thereby tilting frame 22 ‘and re?ector until 60 tending to rotate said bracket to cause at least same is in vthe proper position relative to‘the. one of said levers to bear against its cam whereby light line. 'As lug 35 rides down vcam 26Qplates the angular relationship of said re?ector is main 32 will act to‘tilt frame 2| and re?ector forward tained in predetermined correspondence with the and as said lug rides upward on the cam surface, circumferential displacement of said sleeve on frame 2| is swung upward against the resistance 65 said housing. ' of the coil springs 38. ROBERT M. LYNN.