June 4, 1940. M. WAT'IDER 2,203,345
GUN TURRET Filed April 27, 1938 2 Sheets-Sheet 1 INVENTOR.
MICHAEL. WATTEQ ATTORNEY.
M. WATTER GUN TURRE'I' June 4, 1940.
Filed April 27. 1938 2 Sheets-Sheet 2 INVENTOR.
GUN TURRET- Michael Watter, Baltimore, Md, assignor to The Glenn L. Martin Gompany, Baltimore, Md.
Application April 27, 1938, Serial No. 204,558
. The present invention relates to gun turrets, and particularly to rotatable gun turrets for use in aircraft.
Turrets of many types have been suggested in the prior art, but a majority of them are unsatisfactory because of their limited firing range, their poor visibility, or the production of a great increase in the aerodynamic resistance of the aircraft by their protrusion therefrom.
The primary object of the present invention is to provide a simple type of turret, particularly adapted to be mounted on the side of an aircraft,
which, while avoiding any large increasein aerodynamic resistance, has a wide range of fireand a wide angle of visibility.
to have itself a wide range of angular position,
with a surrounding framework of transparent material so that the visibility is greatly increased, this transparent material fairing the turret into the aircraft.
According to the specific construction which is employed, the turret includes a member of transparent material forming considerably more than truding from the side of the aircraft. In this manner the turret can be rotated through the greater part of a half sphere without increasing the resistance, while permitting good visibility, and while preventing any air blasts upon the gunner.
Still another object of the invention is to provide a turret of this type in which the supportcraft, thus remaining in a protected position although the gun is permitted to have a wide range of fire.
Further objects and advantages of the invention will appear more fully from the following description, particularly when taken in conjunction with the accompanying drawings, which form a part thereof.
In the drawings: Fig. l is a vertical sectional view through a gun one-half of a sphere, a part of such turret proing frame is located principally within the airturret mounted on the side wall of an airplane and embodying the invention.
. Fig. 2 is a perspective view of the mounting frame for the gun and turret.
Fig. 3 is a top plan view of the invention in a 5 modified form.
Fig. 4 is a front elevation of the gun turret of Fig. 3 showing it mounted in a portion of the hull of a flying boat.
As shown in the drawings, the gun turret gen- 10 erally is indicated at Ill. Its mounting includes a portion A intendedto turn about a vertical axis and a portion B mounted on the member A to turn about a horizontal axis. The portion A comprises two arcuate arms 'II and I2 rigid at 15 their ends with pivoted bearing members 2! and 22, and arranged to include substantially a right angle therebetween, thus forming a vertical slot or sector. Bearing members 2| and 22 are mounted on pins carried by lugs 30 and 30' rigid 20 with the side wall 23 of an aircraft body. In this manner the frame A is mounted to turn about a vertical axis, which axis is located substantially at the plane of the side wall of the aircraft.
Each of the members II and i2 has extending 25 therefrom an arm, indicated at I3 and Hi respectively. These arms are substantially perpendicular to the members H and I2, and are curved about theaxis of the bearings 2i and 22 as a center. The length of these arms is such that 8!) with the space between the members H and i2 they define substantially a half circle.
To the ends of the arms l3 and It is pivoted at 28 and 29 the gun support or cradle 13, consisting of two spaced arcuate members I6 and I1 con- 35 nected by cross members I8, these carrying be tween them the support IQ for the gun IS. The gun may be secured to said support, or may be removably mounted thereon in any conventional manner. The axis of the pivots 28, 28 is in the m same plane as, but, perpendicular to, the axis of pivots'2l and 22.
Rigid with the members I 5 and i1 is the turret proper, comprising a transparent arrangement forming the greater part of a sphere. This con- @5 sists of framework members 25, between which are arranged panes 24 of transparent material,
'such as Celluloid, glass or the like, the gun I5 fitting in an opening in the turret.-
By this mounting, the gunner, who of course so stands at the righthand side of Fig. 1, is able to manipulate the gun with clear visibility and through a wide angle. The gun may be shifted vertically about the horizontal axes 28, 28, in such movement swinging up and down in the sector between members H and 02. The gun may also be shifted about the vertical axes 2!, 22. At all times, the gunner is protected from air blasts, since the large dimensions of the transparent turret member or frame, which forms the greater part of a sphere, never uncover the edges of the opening in the wall 23, and no air can therefore enter therethrough or through the turret itself.
In the form of the invention shown in Figs. 3 and 4, the gun is mounted in substantially the same fashion, and the turret is similar to that of Figs. 1 and 2. However, the turret is mounted in the center of a plurality of transparent sections 26 forming a part of the wall of the aircraft, and particularly of the hull of a flying boat. In this manner, the visibility of the device is increased. Tie sections 26 are mounted in the wall in any suitable manner.
The transparent members 26 are arranged in close fitting and fairing relation to one another. They thus streamline that portion of the turret said pivots,- a gun-carrying device pivoted on saidv member to turn about an axis coplanar with and substantially perpendicular to the axis of said first pivots, and a transparent turret member forming more than half a sphere rigid with said gun-carrying device, said turret member being adapted and arranged to prevent .the passage of air therethrough when a gun is mounted therein.