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DWI 17, 1946. c. M. VERHAGEN 2,412,787 JETTISONING MEANS FOR THE ESCAPE PANELS OF AIRCRAFT Filed'May 22, 1943 J0 151 j 3 Sheets-Sheet’ 1 4.19 V J2 uo aw" oueanv d a o o 10 o n a 0 u 19 p a +_ .lnlqJnuQalanca 1 "/2 16 ‘ ‘[7 INVENTOR. v 021462207262 VEI/ZQQ'QMI B , :1 Dec. 17, 1946. v . r c. M. VERHAGEN 2,412,787 ’ JETTISONING MEANS FOR THE ESCAPE PANELS OF AIRCRAF'i| Filed May 22, 1943 ‘ V s Sheefs-Sheet. 2 7/ / Dec. 17, me. ‘ c. M. VERHAGEN 2,412,181 JETTI‘SQNING MEANS FOR THE ESCAPE PANELS OF AIRCRAFT Filed May 22, 1943 ~~22 _ 35 s Sheets-Sheet s ‘ INVNTOR. (‘é/"4510x111 Vér/zqgem BY _, ' MP” WW ' ‘ij’atentecl Dec. 17, 1946 2,412,787 UNITED'STATES PATENT OFFICE JETTISONING MEANS FOR THE ESCAPE PANELS OF AIRCRAFT Christian M. Verhagen, Elkhart, Ind., assignor to The Adlake‘ Company, Chicago, 111., a corpora tion of Illinois Application May 22, 1943, Serial No. 487,997 > 5 Claims. . 1 (Cl. 244-121) 2 . This invention has to do with aircraft con mediate rail assemblies of the escape panel, at the location of the sliding window in thepanel, struction, and is particularly concerned with the problem of affording ready means of escape for the occupants from the pilot’s compartment taken respectively on the lines 9-9‘ and lit-.10 of Fig. or other enclosure in the event it becomes neces sary to get out quickly. The purpose of the invention is to provide, in association with an escape panel, means for in» ‘ Other more speci?c objects and advantages of they invention will be apparent to those skilled in the art upon a full understanding of the con struction, arrangement and operation of the new panel jettisoning means. ‘While the invention is of particularly great value in connection with airplanes, gliders, .dirigibles and other aircraft, because of the ever 20 present possibility of the occupants having to in some measure to enclosures generally. A preferred embodiment of the invention is presented herein by way of exempli?cation, but itwill of course be appreciated that the inven tion is capable of incorporation in other struc turally modi?ed forms coming equally within the scope of the appended claims. In the accompanying drawings: Fig. 1 is a side view of a pilot’s compartment, which compartment is provided at its opposite sides with two hatch-like openings which are normally closed by two escape panels equipped with the jettisoning means of the invention; Fig. 2 is a top view of the pilot’s compartment, ‘showing both of the escape panels; Fig. 3 is a ‘verticalsection through the port side of the compartment, at the location of the escape panel in that side, taken on the line 3-3 of Fig. 2 ; Figs. 4, 5 and 6 are fragmentary vertical sec tions through the escape panel, corresponding re spectively to the top, bottom and intermediate rail assembly sections shown in Fig. 3, taken re , ‘ through the‘intermediate vertical rail assembly in the panel, at the location of the sliding window, dependable, and serves normally‘ to hold the bail out when in the air or having to avoid being trapped by ?re when on the ground, it will be understood that the ‘invention is also applicable l Fig. 12 is a fragmentary horizontal section means is simple, easy to operate and absolutely ~ l line H-_H of Fig. 1; stantaneously jettisoning such panel, which panel securely in position. 1; Fig. 11 is a fragmentary horizontal section through the front edge of the escape panel, at the location of the sliding Window, taken on the taken on the line l2—l2 of Fig. 1; Fig. 13 is a side view of the port escape panel, removed from the pilot’s compartment; and Fig. 14 is a fragmentary perspective view of the locking strip used in holding the escape panel in position. 7 . Referring in more‘ detail to the drawings, it will be observed that the pilot’s compartment of an airplane is shown somewhat fragmentarily at It! in Figs. 1 and 2. This compartment which is located immediately to the rear of the windshield H—is glazed to afford good vision in several directions, and. is‘ closed except for small sliding windows [2 in the forward portions of its sides. The sides of the compartment are curved upwardly and inwardly, and are provided with escape hatches l3 of generally rectangular shape. The hatches l3 are normally closed by 30 escape panels I 4 of the same shape. The win dows l2 are preferably but notn‘eces‘sarily, lo- . catecl within the borders of the escape panels. While two escape panels are shown—one on the port side and the other on the starboard side . the present invention is not concerned with ‘either the number or the locations of the panels. It has to, do only with the means employed for mounting and releasing an escape panel, without regard to either its location or its shape. As both sides of the pilot’s compartment are sub stantally identical, only the construction atthe port side will be described. The escape hatch l3 in the port side of the compartment is framed by an upwardly and rear 45 wardly inclined top frame member l5 (Fig. 4), a horizontal bottom frame member l6 (Figs. 5 ‘ and 9), a vertical front frame member t‘! (Fig. spectively on the lines 4-4, 5-5 and 6-5 of 11) and a vertical rear frame member I8 (Figs. Fig. 1; 7 and‘ 8). The front and rear frame members Figs. 7 and 8 are fragmentary horizontal sec 50 I1 and I 8 are curved upwardly and inwardly tions through the rear edge of the escape panel, in conformity with the curvature of the side of taken respectively on the lines 7-? and 8—-—8 compartmnt at those stations. The four frame of Fig. 1; ,‘Figs. 9 and IQ are fragmentary vertical sec tions through-respectively the lower and inter members I5, [6, H and IS, in addition to rein forcing. the side of the compartment at the loca tion of the hatch, provide locking formations for 2,412,787 A locking strip 4| is positioned in the channels 38, with portions of the strip protruding from the channels into laterally compressed engagement cooperation with the corresponding marginal portions of the panel It. The escape panel I4 includes an upwardly and with the inner faces 40 of the adjacent frame members of the hatch. This locking strip is pref-7 erably formed of rubber or other stiff ?exible ma terial.‘ The strip 14 I. which is made slightly over rearwardly inclined top rail member l9 (Fig. 4), a horizontal bottom rail member 2%) (Figs. 5 and 9), a vertical frontrail member 2| (Fig. 11) and a vertical rear rail'member 22 (Figs. .7 ‘and 8). size,"is inserted progressively under pressure into the channels 38, starting at either end of the strip. curved upwardly and inwardly in conformity with the curvature of the side of the compartment at 10 "The compression of the material of the strip, with its tendency to expand against the jaw-like pro those stations. The panel ‘I4 also includes a The front and rear rail members 2i and 22 are jecti'ons39 in the channels, serves to prevent ac horizontal muntin 23 (Figs. 6 and 10) ‘interme cidental displacement of the strip from the chan diate the top and bottom rail members l9 and 20, "nels, and the ‘resiliently compressed condition of and a vertical muntin 24 (Fig. "12) ‘intermediate the front and rear rail members 26 and 22. The .15 'the‘projectingportions of the strip serves to further ‘insure against such displacement. The upper portion of the panel 14, above the horizon strip 4 I, when in its locking position in the chan tal muntin 23, and the rear half of the ‘lower nels 38 in the panel in laterally compressed en' portion of the panel, are glazed respectively with gagement‘ with the inner faces 40 of the frame transparent panes 25 and 26. The panes '25 and 26 are held in place. by removable glazing strips 20 members of the hatch, is subjected only to direct shearing stress at‘th'e' junction between the ‘panel 21 which ?t into grooves 28 in the surrounding and the hatch. ‘The strip possesses ample members. strength ‘and rigidity to withstand the peak shear-r ing stress to which subjected in service. The strip The sliding window l2-which occupies the front half of the lower portion of the panel |-4_ is provided at one‘of its ends—preferably its rear end-with a pull handle~42 (Figs. 1 and 8). By pulling ‘hard on this handle any person within the compartment can quickly remove the strip 4'! ‘from about the panel. As soon as *‘the strip has beenv removed the panel will no longer have-any thing to hold it in‘ place and will sail off into consists of a sash 29,‘ which'sash is glazed with a transparent pane 3|]. The sash 29 is slidably mounted in vertically spaced guide channels 3| and 32 which are formed respectively on the hor izontal muntin 23' (Fig. 10) of the panel and the bottom rail member 20 (Fig. 9) of the panel. ' The window 12 is adapted to be slid rearwardly from its normally close'd'position in the front half space, leaving the hatchropen. of the lower portion of the panel into an inwardly I claim: ' a ' 1. An ‘enclosure containing an escape-opening, offset out-of-the-way position ‘behind the pane 26 in the rear half of'the lower portion of the a panel normally closing the-openingsaidpanel being provided exteriorly of the enclosure with marginal ?anges whichoverlie the edges of the rearwardly extending continuations 3|’ and 32' opening in the enclosure,andlbeing provided-in of the guide channels~3|> and ‘32. The-construc teriorly of the enclosure with marginal grooves, tion and mounting of the window i2 have ‘noth ‘ing to do with the'jettisoning means-which con 40 and a locking strip of rubber-like materiah-re movably positioned in the grooves, said strip vst'itutes this invention, the provision of a window protruding from the grooves into compresse'dllat of any kind in the escape panel being entirely eraleng'agement with the inner facesof theen optional so far as the invention is concerned.’ closure adjacent the‘opening, and being man The panel 14 ?ts snugly within the hatch i3 in the side of the compartment, with the outer sur- a ually removable from the inside of ‘the panel, progressively along said edges, and said panel face of the panel flush with ‘the outer surface of being free to move outwardly ‘away from the~en the compartment. The‘ bottom rail member 2|] closure upcnthe strip being removed, to provide of the panel rests‘upon the bottom frame member panel, in which latter position it is supported in a free and ‘clear escape opening. (6 of the hatch and is provided on its'under side ' 2. An enclosure'containing-an escape opening, with a shallow groove 33 (Figs. 5 and 9) which 50 a panel normally ‘closing the-opening, and having ?ts over a low rib 34 on the upper side of the laterally extending ‘portions engaging theoutside frame member 16. The groove‘ 33 and rib 34 are 'of'the enclosure, a-strip of ?exiblematerial on ‘the‘inside of the enclosure for locking the panel in position in the opening, said strip frictionally engagingtportions of‘ both‘the enclosure and the panel in interlocked association-with‘the same both curved in ‘cross’ section, and the ‘rib ‘34 is undercutiat 35 on its outer face whereby to per mit the upper edge of the panel to be ‘swung into and out ‘of position with the lower edge of ‘the panel pivoting on the loweredge of the hatch. The upper rail member I9‘ and ‘the front‘and rear rail members 2| ‘and 22' of the panel [4 are provided with ?anges 36 (Figs.34,'7, 8 and 11) which are disposed substantially flush with‘the outer face of the panel ‘in overlapping engage ment'with the outer faces 3'! of‘the- correspond (30 ing‘frame members 15,11 and l8.'of the hatch [3. The rail members l9, “and 22 are'provided, in wardly of the ?anges 36, with ‘seteback ‘channels provide'a ‘free and clear ‘escape ‘opening. ' v3. An enclosure containing an escape, opening, 138'which open toward the ‘corresponding frame members. The'channels '38 are provided'on their a panel removably mounted in said-opening, ?anges on said panel engagingthe outside‘ faces of the‘enclosureadjacent the opening, a read outer sides with sharp jaw-like‘ projectionsBS which terminate ‘substantially in line with the inner faces 40 of theframe members‘ [5, l1 and 118. The channels 38 are ‘connected together and ily ' removable compressible strip frictionally ‘se cured to the inside of the panel-'and1in'"c0m pressed engagement with the inner faces 'of'the extend about the front, top ‘and reari'mar'g'ins jof} the i panel i 4 ‘ in‘ ‘ the‘ general. ‘form'fof an‘ ‘in- ’ ‘verted U. ' ' and extending up "one of’the side" edges ‘of the panel, across the top‘ edge, and down- the other side edge, anda handle attached-'to'the strip ad jacent'one of the ends-of the latter for use'in disengaging the strip progressively from its’ fric tional engagement with the enclosure and-the panel, whereby’ to unlock‘ the panel and-free it"for outward movement away ‘from the‘ enclosure‘ to '> ‘enclosure- adiacent-fthe'opening, said 'compres sible "strip being“ manually" detachable ‘from both 2,412,787 the panel and the enclosure whereupon the panel is free to move outwardly away from the en closure to provide a free and clear opening. 4. An enclosure containing an escape opening, a panel normally closing the opening, means on one edge of said panel forming a separable hinged connection with one edge of said enclosure, means 6 5. An enclosure comprising a wall having an escape opening, a panel assembly for normally closing said opening removably mounted in said opening, said panel assembly having an inner side facing toward the inside of said enclosure, cooperating means on said panel assembly and said enclosure which permits removal of said on the remaining edges of said panel engaging panel assembly from said opening in a direction , the outside of the remaining edges of said en outwardly from said enclosure and prevents re closure which prevent the panel from moving in 10 moval of the same in a, direction inwardly into wardly of the enclosure, a marginal groove on said enclosure, readily removable resilient means the inside of said panel along said last men mounted on said inner side of said panel assembly tioned edges, a ?exible locking strip frictionally and engaging adjacent portions of said. enclosure engaged in said groove and extending laterally for removably securing said panel assembly in into engagement with the inside edges of said 15 said opening, said resilient means being manually enclosure to normally prevent the panel from detachable from the inside of said enclosure to moving outwardly of the enclosure, said ?exible free the panel assembly for movement in the op locking strip being manually removable from the posite direction outwardly from said enclosure to inside of said enclosure whereby the panel will provide a free and clear escape opening. be free to pivot about one edge of the enclosure 20 and fall outwardly from said opening. CHRISTIAN M. VERHAGEN.