Патент USA US2409042код для вставки
F. y. HART ETAL 2,409,041. ' GUN MOUNTING MECHANISM Filed May 12, 1942 4 Sheets-Sheet 1 22 Oct. s, 1946. F. v. HAR‘f Em. GUN MOUNTING MECHANISM Filed May 12, 1942 ~ I 2,409,041 I 4 Sheets-Sheet 2 Get 8, 1946. F. v. HART ETAL 7 GUN MOUNTING MECHANISM Filed_.- May 12, 1942 241-4’ 206 Z54 ' 2,409,041 ' 4 SheetS-Sheet 3 r ‘ Oct. 8, 1946. s > . F, v, HART ErAL 2,409,041 GUN MOUNTING MECHANISM Filed May 12, 1942 / / 7/ x / 266' 4 Sheéts-Sheet 4 . / / 266 > _ 260 ‘Z7 // 2w _ \32 ' 79,1, ‘ -- Z96 Z9; > , iii? 24/} ' ‘ 2741 an; ‘775 272 3/5 2a? 0 as 26 I” 3”” 70 19/! 4’, i I-HTIEF'TIV E: r é. / Patented Get. 8, 1946 2,409,041 UNlTED STATES PATENT OFFICE" 2,409,041 GUN MOUNTING IWECHANISM Fred V. Hart, Lynn, and Lambert S. Linderoth, J12, Marblehead, Mass, assignors, by mesne as signments, to the United States of America, as represented by the Secretary of War Application May 12, 1942, Serial No. 442,688 5 Claims. (CI. 89-41) 2 1 the gun by movements of the handle which cor respond exactly in direction or angularity to those of the gun and correspond in a predetermined ratio with the speed and extent of movement of the gun. Furthermore, to avoid the necessity for the operator to return'the control handle to a zero or neutral position after every movement of the gun, follow-up mechanisms have been pro understood that, broadly, it is equally adapted to vided sothat the stopping of the handle is effec remote control of other devices, such as moving 10 tive immediately to stop the movement of the tools or the like in shoe machinery. gun. Furthermore, if an operator moves the An object of the invention is to provide an im handle quickly, the gun moves quickly with a cor proved remote control mechanism for a device ca responding speed. The follow-up mechanism po pable of movement in a plurality of paths, as in sitioned between the control member and'the planes normal to one another. The direction, extent, and speed of movement of the device to 15 power-operated mechanism is arranged to op erate without overthrow or inaccuracy by direct be controlled will correspond exactly or corre ly connecting the follow-up to the movable part spond in a predetermined ratio with the direc of the power-operated mechanism and hence to tion, extent, and speed of movement of the op the gun itself. Another part of the follow-up crater-controlled member, to the end that an op mechanism is connected directly to the control erator who has been accustomed manually to con handle and the connections are arranged to have trol the device in its various movements will read opposite e?ects, to the end that the gun is ily eiiect a corresponding control by similar brought to a stop when the operator-controlled movements of a remotely located control member. member is stopped. , . . Guns mounted upon airplanes are usually sup In the illustrated apparatus, ?uid-pressure mo ported for substantially universal movement tors are provided for causing the movements of within a limited range as, for example, by piv the gun, and these are controlled by balanced otally supporting the guns for tilting movement valves, so that, once the gun is positioned, it is about one axis to control the elevation and for held automatically in that position without effort swinging movement about an axis normal to the on the part of the operator. The valves have ?rst to control the deflection or azimuth. The movable members which are directly operated space in which said guns are mounted is cramped by follow-up levers having dual fulcrums one of and, usually, adequate armor protection for the which is directly connected to and responds to operator cannot be provided adjacent to the guns. the movements of the control member while the It is well understood also that the force'required other is directly connected to the gun. These to hold such a gun against the pressure of the motors and valves are located closely adjacent to air stream is very considerable and that it thus interferes with the speed with which such gun the gun, while the connections between the fol may be trained and the accuracy with which it low-up levers and the control member enable re may be held in the desired position. mote location of the control member. As herein A, more speci?c object of the invention is to 40 illustrated, these connections are made by means provide a remotely located control handle mount of Bowden wires which are ‘?exible enough to be ed for substantially universal movement in a carried around any necessary corners and are protected portion of the airplane and to connect stiff enough ‘to transmit the force needed to op that control handle to a similarly mounted gun erate the valves. by power-operated apparatus including a follow Preferably, a sighting device is provided which up mechanism connected directly» to the movable = is als'olocated remotely from the gun and which device, such as the gun, to the end that the di is mechanically connected to the gun to follow its rection, speed and extent of movement of the movements. In a modi?ed ‘form of the invention, device shall correspond to the direction, speed the control handle is directly attached to the and extent of movement of the control member. . This invention relates to remote control for power-operated devices and is herein shown as embodied in an arrangement in which it is de sired to have the movements of the device corre spond to the movements of a control member. The invention will be herein described in its ap plication to the training of a gun but it will be sighting device. When this device is moved into In the case of machine guns, for example, these ~ are usually pivotally mounted for movement about axes located in planes which are normal to visual alinement with the target, the gun is power-operated to bring it immediately into a one another and are trained by handles secured to the rear end of the gun. To enable a trained corresponding alinement. gunner to learn quickly to operate the gun by remote control, provision has been made, accord best be understood from a consideration of the These and other features of the invention will ing to our invention-of a control handle mounted for substantially universal movement and ar ranged continuously to control themovements of so following description taken in connection‘ with the accompanying drawings, in‘which Fig. 1 is a vertical section taken‘ longitudinally of the end of'a fuselage, showing in side ele 2,409,041 3 4 vation the gun mount, one of the control handles, permit the guns to swing about a horizontal axis are joined to suitable projections 56 upon pairs of vertical side plates 52. The side plates 52 and the‘sight; Fig. 2 is a plan view on a larger scale of the control handles; 3 Fig. 3 is a detail in elevation, with parts broken away, of the handle-supporting bracket viewed from the side'opposite to that shown in Fig. 1; Fig. 4 is an elevation of the gun mounts look ing toward the rear of the guns and with the are bent outwardly (Fig. 4) for compactness of design and the lower ends of each pair of the plates are bolted to a W-shaped member 54, shown at the right in Fig. 5. At their upper ends, the plates 52are bolted to T-shaped caps 56 and 5?, shown in elevation at the top of Fig. 4 and guns themselves shown diagrammatically as if in 10 in plan in Fig. 7. The head portion of the T shaped member 56 has a stud 58 (Fig. 7) in a ball section; Fig. 5 is a horizontal section on broken line V--V of Fig. 4; ’ Fig. 6 is a vertical section through the gun ‘elevating motor taken on the line VI-VI of Fig; 4-. ; bearing'about an axis normal to a cross plate Ell which is carried on the under side of the partition [8 shown in Fig. 1. A rod 2l6 attached to the cap 51 is similarly pivoted in. plate 60. At the lower ends of these gun-carrying plates 52, the W~shaped pieces 54 (Fig. 4) are pinned to upright rods 62, alined with stud 58 and rod 2l6, respectively. The lower end of each of these and illustrating a portion of the links connect 20 rods 62 is carried by ball bearings on a base plate ing the gun to the sight; 64v which is secured to the partition 20 of the Fig. 8 is a detail view of a portion of the con fuselage. The T-shaped caps 56 and 51 at the nection between the linkage and the sight sup top of the gun supports are interconnected by port and taken below a partition in the fuselage a link 66 (Fig. 7) so that they maintain paral shown in Fig. 1; I lelism, and the swinging of the gun’ mounts in Fig. 9 is a horizontal section on the line IX—IX azimuth about each of their respective axes is of Fig. 4 and looking down upon the control Fig.’ 7 is a plan view of the gun supports, show ingrthe motor for swinging the guns laterally valves; Fig. 10 isv an enlarged vertical’ section through the control valve shown at the right of Fig. 97; effected by power through the action of ?uid pressure’ means herein illustrated as a hydraulic motor ‘iii in which there is a piston 12 having a Fig. 11 is an elevation of the support for the 30 piston rod 13 connected by a link ‘M, at the left, to. the left T-shaped member 55. sight and is taken from the left in Fig. 1; Tilting of the guns in elevation about the hori Fig; 12 is a view similar to Fig. 1 but showing zontal fulcrums 46 is effected by another hy an alternative arrangement in which the con draulic motor 86 (Figs. 4, 5 and 6) secured to the trol handles are positioned near the sight; base plate 64. The piston 82 of this motor is Fig. 13 is an elevation showing the modi?ed joined by a piston rod 84 to a slide 86 having gun sight and control handles and taken from side ?ns 88 and at its lower end 90 encircling the left in Fig. 12; ' Fig. 14 is a horizontal section on the line XIV—XIV> of Fig. 13; and Fig. 15.is a detail horizontal section on the line the outside of the cylinder of the motor 80. The lower end '90 is grooved to receive side plates 92 and 94 (Fig. 5) between the opposite ends of which are split blocks 96 which rotatably re XV—XV of Fig. 12. ceive the sleeve-like lower portions 98 of travelers One opportunity for the utilization of the con I00 each slidable upon one of the rods 62 and trol apparatus to be described is- found in air prevented from rotation with respect thereto by planes where, for example, a gun compartment 45 a spline I62. The travelers lll? are joined by I0 is formed inside a section of the fuselage l2 links I64 to the pivots 48 upon the arms 44 which as, for example, at the tail of an airplane where are clamped to the rods 42 at the sides of the guns. Operation of the motor 80 is therefore between partition plates l8 and 26~with the'guns 50 effective to tilt the guns about their horizontal fulcrums 46 so as to elevate or depress the muzzles pointed rearw’ardly through a port 22 in any the twin guns i4 and I6, shown here in outline as being of the machine-gun type, are carried direction within a sixty-degree cone for'each without interfering with their lateral movement. It will be seen, therefore, that, since the lateral gun. Inasmuch as the skin of the fuselage'pro movements ina'horizontal plane, for example, vides no substantial protection against gun ?re, are independent of the up-and-down movements an operator’s compartment has been divided off 55 of the guns in vertical planes normal to the plane by a partition 24 ofarmor plate in which, for of, its, lateral movement, it is only necessary to convenience, there is a hinged door 26 to be control the admission of fluid to the motors l6 utilized in supplying ammunition to ‘the gun or and 80, in order to be able to point. the guns in for any necessary repair work. The. head of any one of an, in?nite number of directions. In the gunner will be within a bulge‘ 28 of the 60 so doing, it is convenient to consider the move fuselage which is provided with suitable windows ment of a point on the back end of the gun, for 36 and, in this portion of the fuselage, there is provided a gun sight 32 of any suitable type example-,and to note that the angular movement of a point onthe control handle is duplicated but herein shown in outline as a standard re?ex by the point on the gun, while the speed and ex~ ' sight having a casing 34 and, an aiming device 65 tent of movement of the gun corresponds in a utilizing'a cross-hair image 36 (Fig. 11). The predetermined ratio, to the speed and extent of pointing of the gun is eifected by means of dual movement of ' the. handle. control handles 36 universally supported upon a The pointing of the guns was formerly effected bracket bill which is fastened to the under side by grasping handles H6 fastened ‘directly to the of the armor partition 24. 70 guns themselves to move them manually but, The guns l4 and I6 are each'provided with when the guns are mounted as they are upon side rods 42 upon which there'are clamped arms airplanes, the air currents along the fuselage 44 (see also Figs. 4 and 7) which extend for tend constantly to divert the guns. from their Wardly to ‘provide fulcrums 4'6 and rearwardly intended directions, and the physical labor of to provide pivots 48. The fulcrums 46 which 75 moving and aiming them is very considerable. 2,409,041 5 Advantageously, therefore, the control handles 38 are mounted for movement on the‘bracket 40 so as to correspond to the movements of the handles IIO on the guns themselves. To this end, the handles are clamped to a T-shaped car-. rier II2 (Figs.v 2 and 3) which is pivotally mounted at II4 between arms II6 xtended up wardly from a rotor IIB having a depending sleeve portion pivoted in the bracket 40 for move 'ment around a vertical axis. The handle carrier I I2 is provided with a notched portion I20 which cooperates with a stop pin I22 to keep up and down movements of the guns within the cones of 6 In the casing of the valve I50 is a ?xed sleeve I60 provided with external annular grooves con nected by a series of openings, such as that shown at I62, to the interior of the valve in which there is a slidable valve member I64 having a stem I65 and provided at each end with a ?exible packing I66 such as is shown in section at the right end and having at its left end a guide block I68 which is similar in shape to the block I68’ (shown at the left of Fig. 9) and has pivot pins I69 like the pins I69’ in Fig. 9. These pins I69 are received in holes, slightly larger than the pins, in the side arms I10 of a forked lever I12 which acts as a control member and is joined at \ ?re. Similarly, the rotor IIB has a notched por- ' tion I24 (Fig. 2) corresponding with a stop pin 15 its lower end by a link I14 to an arm I16 clamped ‘to one of the vertical rods 62 which turns in its I26 similarly to limit lateral swinging of the ball-bearing base whenever the guns are swung handles and hence of the guns. On the carrier laterally. In that block I68 is a notch (not II: is an arm I28 joined to a vertical rod I30 shown), such as that shown at I165 at the left the lower end of which is connected to a bell" crank I32 (Fig. 1) pivoted on the bracket 40. 20 of Fig. 9, in the block I68’. The notch of the block I60 surrounds a ?xed rod I80 extending The other arm of the bell crank is joined to a out from the valve casing and having limit nuts Bowden wire I34 leading to a bell crank I36 I82 to control its range of movement. The other pivoted upon the casing of a control-valve mech end of the lever I12 is connected by a link I84 anism I40 supported on a bracket I4I attached to the base plate 64. This valve mechanism I40 25 to an end of the bell crank I49 to which there are transmitted the right-and-left movements of controls the motor 80 by which elevational move the handles 38 through the Bowden wire I44. ments of the guns are produced. The rotor II8 The valve member I64 has a series of piston: associated with the control handle has an arm like enlargements or lands I61 so that ?uid under I42 (Fig. 2) to which there is joined a Bowden wire I44 leading through a guide I46 on the 30 pressure delivered to the valve casing through a port I90 will be transmitted to either the right bracket 40 and another guide I48 (Fig. 9) to a or the left end of- the cylinder of the motor 10 as bell crank I49 pivotally connected to the casing the handles 38 are moved. The enlargements I61 of a control-valve‘mechanism I50. The valve are of equal diameter so that the valve is balanced mechanism I50 is attached to the base plate 64 (Figs. 4 and 9) and controls movements of the 35 and the widths of the lands are almost exactly guns in azimuth. equal to the diameters of the coacting openings, ' construction and operation and accordingly only such as that at I62. Hence, only a minute move ment of the valve member I64 is needed to open given numerals like those used in describing parts in that end of the cylinder 10 toward which the to each number. Examples of such parts are the piston I65’ and a block I68’ notched at I18’ to surround a ?xed rod I80’ and having pins I69’ by which it is pivotally mounted in a forked follow-up lever I12’. This lever I12’ is pivoted at one end to a link I14’ joined by a pin I15 to the ?ns 88 of the slide moved by the motor 00 to produce movements of the guns in elevation. The balanced-valve mechanism I50 by means of which the right and left movements of the gun to change its azimuth may be effected is shown in Figs. 9 and 10. The casing is provided with a port I52 which communicates by means of a pipe I54 with the left-hand end (Figs. 4 and '1) vof the cylinder of the motor 10 so that, upon the admission of ?uid through this pipe to the cylinder, the piston 12 shown in Fig. 7, will be moved to the right and the rear ends of the guns I4 and I6 at the lower end of Fig. '7 will be moved to the right. By means of another port I56 and a connecting pipe I58 joined to the right -hand end of the motor 10, movement of the rear ends of the guns to the left may be effected by the action of the pressure ?uid on the opposite end of the piston 12. It will be recalled that the piston 12 is connected by a link 14 with the elongated portion of the T-shaped member 56 at the top of the gun carrier and that the two guns are connected by a parallel linkage including a port I92, regardless of which way the piston 12 The control-valve mechanisms are identical in the valve, thus making the apparatus instantly one of them is herein illustrated and described in detail. To facilitate this description, a few :40 responsive to movements of the control handles 38. The annular grooves in the valve sleeve I60 parts of the valve mechanism I40, which parts adjacent to the ends thereof are interconnected are better shown and are like the corresponding by a longitudinal passage I94 so that the oil, parts of the valve mechanism I50, have been of the mechanism I50 but with a prime added 45 piston 12 is moving, can be exhausted through a is moved. There is provided, therefore, by the control member I12 which is arranged to operate the 50 valve I50 and which is oppositely connected to the work and to the operator control, a follow up mechanism the action of which is automatic. The action of this follow-up mechanism more over is continuous in that it effects an instant 55 response to the movements of the control handle thereby avoiding any lag or hunting movements of the gun and insuring the duplication by the gun of the position of the control handle. , A movement of the gun is imediately trans 60 mitted to the sight 32 by reason of mechanical connections extending between the two. To this end, the sight is attached to hangers 200 (Fig. 11) pivoted at 202 between the upstanding arms of a stirrup-like support 204, which is riveted upon the upper end of a vertical rod 206. The lower end of this rod is rotatably supported in a bearing 208 (Figs. 1 and 8) secured to the parti tion 24, and turning movement about a vertical axis, to accord with the lateral de?ection in 70 azimuth of the gun, is imparted to this rod by means of a lever 2I0 (Figs. '7 and 8) attached thereto and joined by a connecting rod M2 to a lever 2I4 secured to the top of the vertical rod 2I6, which is fastened to the cap 51 at the top link 66 (Fig. 7) so that they are always parallel. 75 of one of the gun supports (Fig. 4). ‘ __ 2,409,041 7 Furthermore, it is necessary .to tilt the sight 32 about thepivots 292 to a degreematching the up-and-down tilting of the guns, and thisis done by means of a lever 22% (Fig. 1) fulcrumed at 222 on the inner side of the fuselage l2.. The lever 22!] has its outer end 224 forked (Figs. 4 and '7) and slidable in the grooves of a block 226 8 the up-and-down movementsof the slide 86 for tilting the guns to elevate or depress‘ them. An arm 3118 supports a sheath 310 for this Bowden wire. It will be noted that the yoke 298 (Fig. 14) is provided with a stop pin 3l2, which is adapted to be engaged by ears on a collar 314 secured to the upright sight-supporting rod 272. By this arrangement, the lateral turning of the sight mounted on the upper end of ‘a rod 228. ‘This rod 228 slides in a suitable bearing in the upper and the handles 260 is limited to the range of plate 60 of the gun carrier and is given a reduced 10 movement, laterally, of the guns and supports. movement proportionate to the movement of the It follows that this modi?ed mechanism brings gun-elevating slide 86 by means of a lever 230 the control handles 260 to a point beside the fulcrumed at one end upon brackets 2'32 (Figs... 1 sight 32, and, by reason of the direct connection and 4) depending from the plate 651, and pivoted between the handles and the sight, causes sub at the other end to a connecting rod 234 which 15 stantially synchronous movements of the latter extends down to and is fastened to the slide 86. and the guns, as theBowden wires 284' and 306, At its inner end, the lever 220 is forked at 235 by reason of their connections to the control (Fig. 7) and has a sliding and pivotal connec valves l50 and M0, produce corresponding move tion 238 (Fig. 11) with a block member 249 which ments of the guns. . . is slidably mounted on the supporting rod 205 20 In the operation of the arrangement illustrated and has a spool portion 242 receiving a notched in Figs. 1 to 11, the gunner, grasping the control yoke 244 (see also Fig. '7). The ends of this handles 38, will move them about the universal yoke are joined by ?at links 246 (Fig. 1) to rigid mounting provided on the bracket 40 and, by arms 24:; which are integral with the hangers means of the control mechanism including the 209. The lower ends of these links 2436 are con~ 25 directly-connected follow-ups, will cause an im nected by parallel links 250 to downwardly mediate training of the guns in such a manner directed arms 252 which are a part of the stirrup~ that the angular displacement of a point upon like hanger or support 204 (Fig. 11) , The hanger the rear end of a gun will correspond exactly to or support 264 thus forms a part of a parallel the movements of a point on the control handle. linkage, including the links 246, the arms 2% 30 These movements will be compounded of verti and the links 258. Up-and-down movements of cal movements in planes normal to one another the gun-tilting slide 68 are therefore communi about the fulcrums M5 and of lateral swinging cated through the reducing lever 230 to the long movements about the axis of a rod 62. The lever 220 and thence to the parallel linkage actual movement of a point on the rear end of which is joined to the yoke 24%. The‘mecha 35 the gun will therefore take place along any one nism just described is, therefore, capable of turn of a plurality of paths in either direction. Since ing and tilting the sight 32 so that it is always these movements are compounded of. movements parallel to the longitudinal axes of the guns l4 produced in azimuth and movements produced and H5 and gives the gunner an accurate indica in elevation, it will be suf?cient to note the tion of the direction in which they are pointed. 40 operation of either one of these devices. For In a modi?ed form of the invention illustrated example, if the control handle 38 is swung about in Figs. 12 to 15, inclusive, the mechanism for its vertical axis, its movement will be trans turning and tilting the gun is exactly the same mitted through the Bowden wire I44 (Figs. 2 as in the arrangement already described, but the and 9) to the bell crank I49 which is directly control handles 25B are here mounted on arms connected by the link I84 to one end of the follow 262 integral With hangers 2513 for the gun sight up mechanism exempli?ed by the lever I12. This 32. These hangers also have forwardly extending movement of one end of the lever H2 produced arms 268 for a purpose similar to that of the by the handle will be immediately transmitted to rigid arms 243. The hangers 264 are pivotal-1y the valve 153 as the lever swings about the mounted at vits at the upper ends of the arms of 50 fulcrum provided by the link I14, and the move a supporting stirrup 2Y8 which is fastened to the ment transmitted to the valve will cause the top of a vertical rod 272 and the latter is rotatable ?ow of ?uid under pressure to that end of the in a bearing 2M attached to the underside of the ?uid motor 'Hl' (Fig. 7) which will cause a swing partition 24, and has at its lower end an arm ing movement in a horizontal plane, and in a 216 (Fig. 15) joined by a link 278 to a lever 285 55 direction corresponding to that of the handle which is pivoted upon the lower end of a bracket movement, of the guns l4 and IB' about their 282 attached to the partition 2%. At the other vertical pivots 58 and 62' (Fig. 4) . If the handle, end of the lever 280, there is attached a Bowden as viewed in Fig. 2, is moved to the left, for wire 284 leading to the valve I59 which controls example, the Bowden wire I41! will be pushed, the lateral swinging movements of the guns as 60 causing the upper end of the lever H2, as viewed the gun supports are turned by means of the in plan in Fig. 9, to be moved to the right. This power transmitted from the motor "50. An ex will shift the valve member I65 to the right, in tension 236 of the bracket 282 provides a sup port for the sheath 2&2 of the Bowden wire 284. The stirrup 228 is provided with depending arms Fig. 10, letting fluid under pressure ?ow through the port I90 and thence through the connecting pipe !58 to the right end of the motor 10, thus 290 joined by parallel links 292 to upright links causing the rear ends of the guns to be swung to 294, the lower ends of which are bolted to a yoke 296 (Fig. 14;) engaging the groove of a spool 25% (Figs. 12 and 13) slidable vertically on the rod 212. This spool is connected by links 3% to a forked lever 302 (Figs. 11 and 15), the other end of which is pivoted on the bracket 282- This forked lever 302 has a nub smite which is con nected the upper end of a Bowden wire 3%, which controls'the valve M0‘ that ‘determines the left. i The speed of this movement will depend upon the degree of opening of the passage I56 by the valve member I64 and. this will depend upon the speed of movement of the control handle 33. Thus a quick movement of the handle will be accompanied by a quick operation of the motor 10', and it will be noted that this action takes place by reason of a direct connection of‘ the 2,409,041 control handle 33 to the valve member. Just as soon as the motor starts to move, thereby turn ing the guns, there will be a turning movement of the arm I16 (Fig. 9) clockwise in this particu~ 10 and link means pivoted at one end of said gun on an axis parallel to and offset with respect to said ?rst axis, and to said traveler at the other end, whereby operation of said power means piv ots said gun in elevation. 2. In a power-operated mount for a gun, a pair the link I'M upon the follow-up lever I12 and of vertical side plates connected to form a frame tending to swing this lever about its pivotal con» embracing said gun, means pivoting said gun on nection to the link I84 in a direction to draw and within said frame for elevation about a nor the valve member I84 to the left so as again to ?rst axis, means pivoting said shut off the supply of pressure ?uid through the 10 mally-horizontal frame for movement about a normally-vertical pipe [58 to the motor unless the operator is at second axis and including a splined shaft aligned the same time moving the hand lever 38 to the with said second axis and rigid with said frame, left to counteract this tendency to close the valve a traveler surrounding said shaft and engaging 464. In consequence of this arrangement, the the spline thereof for translation only on and operator is under no burden of returning the 15 along'said shaft, a link pivoted to said traveler at control handle to any initial position but moves it one end and to said gun at the other end, upon only where he would move it if he were operating an axis parallel to and offset from said ?rst axis, the guns manually. The extent of movement of a hydraulic motor comprising a cylinder, a pis the guns accordingly corresponds, either exactly ton and piston rod, having their axis parallel to or in a predetermined ratio, to the movement of 20 and offset from said second axis, a guide mounted the control handle 38. The extent of the angular for translation on and along said cylinder, a rigid lar instance, thereby reacting directly through movement of the gun is the same as the extent connection between said piston rod and guide, of angular movement of the control handle. It an arm ?xed to said guide and extending adja has already been noted that the speed and direc cent said traveler, and a swivel connection be tion of movement of the gun depend upon the 25 tween said arm and traveler, whereby reciproca speed and direction of movement of the control tion of said piston, rod, guide, arm and traveler, handle and, consequently, the direction, speed pivotally moves the gun in elevation. and extent of movement of the device are deter 3. The structure as in claim 2, said frame in mined and controlled directly and continuously cluding a cap at the top thereof, a second hy by the direction, speed and extent of movement 30 draulic motor comprising a cylinder, piston and of the control member, and, even though the piston rod, adjacent said cap and having its axis control member 38 is remotely positioned from normal to said second axis, and a link pivoted to the device, here the guns, the gunner can with con?dence initiate the ?ring of the guns at any time with the assurance that there is no lag or hunting and that the guns occupy a position like that occupied by the control member. It will be observed that the sighting device 32 will be immediately and correspondingly moved to bring it into visual alinement with the target. By reason of the direct connections of the follow said rod and to said cap, at a point off-set from said second axis. ll. In a power-operated mount for twin guns mounted side by side and adapted for training and elevation in synchronism, a pair of frames, each surrounding a respective gun, means mount mg each gun in its frame for elevation with re spect thereto about a normally-horizontal ?rst axis, means mounting each frame for movement up to the control handle and to the gun, the ex about a normally-vertical second axis and in tent of movement of the gun and the speed of cluding a pair of parallel shafts each co-axial movement thereof will correspond in a predeter with a respective second axis, a pair of travelers 45 mined ratio determined by the design of the each mounted for translation only on and along follow-up lever to the speed and extent of move a respective shaft, link means connecting‘ each ment of the control handle. traveler with a respective gun, on pivot axes par In the device illustrated in Figs. 12 to 15, in allel to and offset fro-m said ?rst axis, a ?rst mo clusive, where the control handles are directly tor between and parallel with said shafts and in connected to the sighting device, any theoretical ’ cluding a cylinder, piston and piston rod, a guide lag between the movements of the gun and the mounted for translation on and along said cyl movements of the handle, so that the bringing inder and rigidly connected with said piston rod, of the sighting device into visual alinement with and a member ?xed to said guide and having the target will slightly anticipate the movements oppositely projecting arms each swiveled to a of the gun, is so slight as to be substantially im respective one of said travelers, whereby on ap perceptible to the operator. plication of hydraulic pressure to said piston, Having thus described our invention, what we said rod, member and travelers are reciprocated claim as new and desire to secure by Letters Pat ent of the United States is: as a unit, to synchronously move said guns in elevation. 1. In a power operated mount for a gun, a pair 60 5. The structure as in claim 4, a link pivoted to of normally-vertical side plates embracing said said frames and connecting the same for move gun and interconnected above and below said gun to form a frame, means pivoting said gun on and between said plates for elevation about a ?rst normally-horizontal axis ?xed relatively thereto, means mounting said frame for pivotal movement about a second normally-vertical axis and including a shaft aligned with said second axis and ?xed to said frame, a traveler guided for translation only on and along said shaft, motor 70 means connected to so translate said traveler, ment in unison about said second axis, a second motor comprising a cylinder, piston and piston rod, with their axis normally horizontal, and a direct connection between said last-named pis ton rod and one of said frames, whereby opera tion of said second motorrotates said guns in unison about said second axis. FRED V. HART. LAMBERT S. LINDEROTl-I, JR.