US2016211A - Aircraft armament - Google Patents

Description

Qc&.1,1 935. J. MIRANDA ,01 V

AIRCRAFT ARMAMENT Filed Novi 2, 1934 '2 Sheets-Sheet 1 INVENTOR A fdfM/nmvaA.

u v I ATZ'OBIVEKS v nected with the aircraft I2.

Patented Oct. 1, "1935 ED;sums

jjaoiazir 5 AIRCRAFT l Ignacio J. Miranda, New York, N.'-.,' assignor to American Armament Corporation, New York, I

N.':Y.V, a corporation of New York 7 v Application November2,1934, 'seriaino,b51218]; f j 5 Claims. ems-37 I The above-mentioned resistance v decreases as 15 the -gun nears the pivotal axis upon being elevated, and increases as the gunis again de pressed, and a further object is to, provide for automatically adjusting :the aforesaid balancing means during such elevation and depression to 20 vary-its efiect as required.

With the foregoing in view, the invention re sides in the novel subject matter hereinafterdescribed and claimed, description being accomplished by reference to. the accompanying draw- 25 ings.

difierent forms of the invention and it may be considered that the guns shown in Figs. 1, 3 and are mounted in the rear cockpit of an aircraft 30 whereas in Fig. 2 the gun is primarily within a turret-carried by the nose of the fuselage, hull or the-like.

In Figs. 1, 3 and 4, I denotes a turntable by means of which the gun mount II is conto the gun proper which is mounted by means of horizontal trunnions H- upon the mount II. Any preferred means, may be provided for turn-- ing the turntable I!) about its ,vertical axis to 4 traverse the gun l3, and any desired provision 'may be made for elevating and depressing the gun. Parts of elevating and depressing means are shown at l5 and IS, the former being a segment meshing with a pinion .which may be turned by the member [6,.said member l6 being a hand-wheel.

Due to the extent to which the gun barrel II projects from the vertical axis of the turntable l0, when the gun is. disposed in any position-ex- 50 cept one extending truly longitudinally of the aircraft, the wind pressureagainst said barrel, unless counteracted, would seriously resist turning of the gun and turntable about the vertical axis of the latter. Therefore, .I make novel pro- 55 vision at the opposite side of the turntable axis.

In Fig;- 1,

Figs. 1, 2, 3 and4 are side elevations showingl3 has reference I for counteracting the 1 effect, of II the aforesaid wind pressure so that 'theturntable andgun may befturned with ease about said' turntable axis; l

the counteractingmeans the '5 r I fornrof a vane l8 fixedly secured to. aiisuitable part ofthe-gun mount'l I. 'Ih is vane is so. lo-

cated proportionedand shaped relat fi t0 the barrel l3 and any other parts similarly receiving; the wind pressure, that wind pressure at 10 one-side of the turntable axis. tending to resist traversing of the gun in one direction, is balanced and counteracted by the wind pressure tending to retard rotation in v the other direca portion of 'thisreceiver is exposedto. wind pressure to, counteract theefiect ofjsuch presv sure on the forward portion of the gun, one side wall of said receiver being extended upwardly in the form of a'vane 20. a i e In Fig. 4, the balancing vane 2| is slidable toward and from the turntable axis, being mounted in appropriate guiding means 22 and 23. One-of the trunnions His providedwith a crank'arm 24 which is pivoted at 25 to a link 26, this link being pivoted at 21 to the vane 2|. As

the gun barrel is elevated, the crank arm 24 I and link 26 move the vane 2| toward the turntable axis and as the barrel is again lowered, said I crank arm and link move said vane away from said axis. Thus, as the barrel is elevated and Hon, thegresult being that: the gun maybe trav- 15 f ersed withoutbeingretarded by wind resistance. .@.In-Fig. 3, a receiver I9 is provided for the empty shell cases ejected'from the gun l3,.and

theefiect of the wind pressure against it is correspondingly lessened, the effectiveness offthe'v vane 2| is correspondingly decreased, and vice versa, so that the wind pressure will have no retarding effect upon rotation of the gun about its vertical axis. 40 In Fig. 2, the gun barrel l3 projects beyond a turret'28 carried by theturntable l0, and tocounteract the effect of wind pressure against the projecting portion of the gun, a balancing vane 29 is secured to said turret at the side-of the 'turntable axis opposite the projecting gun portion. V

In the several views, the dot and dashline A-A represents the vertical axis about which the gun is rotatable.

, It will be seen from the foregoing that provision has been made for expeditiously attaining the objects of the invention, but attention is invited to the fact thatwithin the scope of said invention as claimed, numerous variations may be made.

2 Iclaimi;

1. In an aircraft armament, a rotatable 3 about'a vertical axis and having means-whereby it may be elevated and depressed, said gun having aportion subjected to wind pressure at one side of said axis, a balancingvane subjected to wind pressure at the opposite side or saidv axis, means mounting said1vane for rotation with said gun about said axis and for movement toward and from said axis, and means operatively connecting said gun and vane ior automatically moving said vane toward said axis as the gun is.

elevated, and away from said .axis asthegunis again depressed. a

2. In an aircraft armament, a mounted upon a v vertical axis and upon a horizontal axis, said gun having a portion subjected'to wi 7 pressure atone side of said vertical axis, a ba -i ancing vane subjected to wind pressure. at the opposite side of saidvertical axis, means'mount ing said'vane for rotation withsaid 'gun abbut said vertical axis and for movement'toward and from said vertical axis, a crank arm rigidly 'connected with the'gun and'swin'gablei aboutsaid horizontal axis as the 'gunis elevated and devpressed, said crank arms-projecting rearWardly from said horizontal axis, and a link connecting said crank arm with said vane for moving-said E1 is again depressed. I a L In anaircrait armamena agun nt vane towardsaid vertical axisas the "gun is elevated, and away from said vertical axisas the upon a vertical axis and uponfa horizontal axis,

, ing said vane for rotationwith said "gun-about said vertical axis and formovement toward and said, gun havinga portion subjected-to wind jn'essure at {one side of said vertical axis, a balancing vane subjected to wind pressure at the opposite-side of said vertical axis, means mount from vertical: axis, a crank arm rigidly connected withthe gun and: swingable about said horizontal axis as the-gun is elevated and depressed, and a link connecting said crank arm with said vane for moving said vane toward said 5 vertical axis as the gun is elevated, and away from; said vertical axiswasthe gun isagain' depressed."

4. In a aircr'an adm t; a mam ..;about a vertical axis and having a trunnion about 0 which it maybe: elevated and'depressed, said 'gun having a portion subjected towind pressure at one sidegoi said vertical axis, a balancing vane subjected"toiwind pressure atlthe opposite side offsaidjvertical axis, meansimounting said vane 15 for rotation withsaid an about said vertical axis 'an'dtor movement toward and irom'said verticalaxis, and means operatively connecting said trunnion and'said vane for automatically mov-.

"ing 1 said vane toward said vertical axis as the go is elevated; and away from said vertical axis as the gun is again depressed;

v 5. Inan aircraft armament, a about avertical axis and having a trunnion about "which-it may be elevated and 'depressed, said gun'gs having a portion subjected to wind 'pressure at one-sideot said verticalaxis, a balancingvane subjected to I wind pressure, at "theopposite side of said vertical; axis, means mounting saidvvane iori rotation with:.said gun about saidkvertical so 7 axis-and for. movement towardandgi'rom Esaid vertical axis, a crank arm secured-to said trun- -nion',1- and, a link operatively connecting said crank arm with said vane for automatically moving said vane toward said vertical iaxis as, the

is-eleva'ted, and away irom said vertical axis .as the gunis again depressed; W

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