Патент USA US2125892код для вставки
Aug. 9, 1938. A. DABRASKY 2,125,892 GUN Filed Feb. 4, 2.955 2 Sheets-Sheet 1 Aug. 9, 1938. A. DABRASKY 2,125,892 Y GUN Filed Feb. 4, 1933 2 Sheets-Sheet` 2 Inventur Aucfustllahrasky Attm-ney Patented Aug. 9, 1938 UNITED STATES rarest orties 2,125,892 ‘ n ‘ GUN August Dabrasky, Washington, D. C., assigner to the Government of the United States of Amer ica, as represented by the Secretary of War Application February 4, 1938, Serial No. 188,683 " ' 6 (jaime.V (c1. ssi-_37) ' (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) The invention described herein may be manu factured and used by or for the Government for governmental purposes, without the payment to me of any royalty thereon. 5This invention relates to a gun. Because high speed aircraft is within the range of an antiaircraft gun for only a short period of time it is necessary to develop a high rate of ñre to increase the probability of hitting the target. 10 With a modern 3 inch antiaircraft gun it is possible to load and fire at the rate of forty rounds per minute but the gun barrel becomes overheated and due to expansion of the metal its movement in the cradle during recoil and 15 counterrecoil is interfered with and frequently prevented. The purpose of this invention is to provide a gun barrel mounting which will allow for radial and longitudinal expansion of the barrel and 20 which will enable the barrel to be cooled sui ñciently to insure its reciprocation in the cradle while maintaining a maximum rate of fire. A further object is to provide a mounting which will facilitate the rapid and convenient removal 25 and replacement of the gun barrel. To these and other ends, the invention con sists in the construction, arrangement and com bination of elements described hereinafter and pointed out in the claims forming a part of this 30 speciñcation. A practical embodiment of the invention is il lustrated in the accompanying drawings, wherein: Fig. 1 is a plan View, partly in section, of a gun constructed in accordance with the invention. 35 Fig. 2 is a view in side elevation with the cradle in section. Figs. 3 and 4 are views, respectively in side ele vation and in plan of one of the rails. Fig. 5 is a sectional view on the line 5--5 of 40 Fig. 1. Fig. 6 is a sectional view on the line 6_6 of Fig. 5. Figs. 7 and 8 are sectional views on the cor 45 responding lines of Fig. 3. Referring to the drawings by characters of ref erence there is shown a cradle 5 which is pro vided with trunnions 6 whereby it is mounted in a carriage (not shown) for movement in eleva tion. The lower portion of the cradle which car 50 ries the recoil and counterrecoil mechanism has been omitted. The cradle includes a pair of spaced, forwardly extending arms 'I--'I whose low er sides are connected by a thin ribbed plate 8 to afford rigidity. The forward portion of the 55 plate is formed with a plurality of openings 9 which in addition to reducing the weight serves to permit free circulation of air. The front ex tremities of the arms are further strengthened by an’overhead arcuate plate I0. The inner sides of the arms are each provided with a groove I I. The gun which is to be mounted on the cradle comprises a breech ring I2 and a barrel i3 whose rear end has an interrupted thread connection I4 with the breech ring. A pair of similar rails iti-«55, each including wearing strips I6, are se cured to the opposite sides of the breech ring by means of screws I'I and each rail has a lug I8 engageable in a recess in the breech ring. The rails are slidably mounted in the grooves Il of the cradle arm ‘I and extend some distance in 15 front of the arms to allow for movement of the gun in recoil. A supporting ring I9 disposed between the rails near their front ends and forwardly of the cradle arms 'I is formed with a pair of aligned lugs Ztl-20 each of which is received in a recess 2| in the corresponding rail and secured by screws 22. The internal surface 23 of the ring I9 is rear wardly tapered (Fig. 6) and supports an expan sion ring 24 having a correspondingly tapered eX~ 25 ternal surface 25. The rear portion of the eX pansion ring is formed with internal threads 25 which engage threads 21 on the gun barrel and it is held in place by a set screw 28. A plurality of arcuate grooves 29-29 are cut in the front 30 and rear faces of the expansion ring. By reference to Fig. 1 it will be noted that the internal diameter of the supporting ring I9 is greater than the external diameter of all portions of the barrel in rear thereof so that it is possible to move the barrel through the supporting ring. This construction facilitates the removal and re placement of barrels without disturbing the breech ring I2 and the rails I5 and the connections of the breech ring to the recoil and counterrecoil 40 mechanisms (not shown). Since the rails I5 and the cradle arms ‘I are spaced an appreciable distance from the gun barrel I3 they do not become overheated during ñring and prevent movement of the gun. The 45 front support of the gun barrel is at about its center, well forwardly of the cradle arms, and the expansion ring is specially designed to minimize heat conduction. Radial and longitudinal expansion of the gun barrel will be taken care of by the expansion ring 2'4 and its mounting in the supporting ring. I claim: 1. In a gun, a cradle including a pair of arms each having a groove on its inner side, a breech 55 2 2,125,892 ring within the cradle, a pair of rails on the breech ring slidably mounted in the grooves of the cradle arms and extend-ing forwardly of said arms, a gun barrel detachably connected to the 10 by the rails forwardly of the cradle and having a rearwardly tapered internal surface, and- an ex pansion ring carried by the gun barrel and hav ing a rearwardly tapered external surface fitting breech ring and. spaced from the rails, a sup« porting ring carried by the rails and disposed for in the supporting ring. wardly of the cradle arms, said ring having a rearwardly tapered internal surface, and an ex pair` of rails slidably mounted in the cradle, a gun barrel connected to the breech ring and spaced from the rails, a supporting ring carried by the rails forwardly of the cradle and an ex 10 pansion ring carried by the gun barrel and fitting pansion ring carried by the gun barrel and having», a rearwardly tapered external surface fitting in the supporting ring, the front and rear faces of-LÍÍ the expansion ring provided with arcuate grooves. 2. In a gun, a cradle including» a pair ofi arms each having a groove on its inner side, abreech 15 ring within the cradle, a pair of rails on the breech ring slidably mounted. in the grooves> of' the cradle arms and extending forwardly of: said. arms, a gun barrel connected to the breech ring and spaced from the rails, a supportingringïcar 20 ried by the rails and disposed forwardly of-- the> cradle arms, said ring having aA rearwardly ta pered internal surface, and- _an-> expansion. ring carriedk by the gun barrel and having a rear wardly tapered external surface iìttingk in the supporting ring. 3. In a gun, a cradle,` a breech-ring> having a pair of rails slidably mountedA in the cradle, a gun barrel connected to the: breech ring and spaced from the rails, a supporting ring carried 4. In a gun, a cradle, a breech ring having a in thesupporting ring. 5. Ina gun, a cradle, a breech ring having a pair of rails slidably mounted in the cradle, a gun barrel connected to the breech ring and 15 spaced from the-rails; a supporting ring carried the Yrails and an expansion ring carried by the gun barrel and fitting in the supporting ring. 6I In a'gun, a cradle, a breech ring having a pair of rails slidably mounted in the cradle, a 20 gun barrel detachably connected to the breech ring, a supporting ring carried by the rails and having an internal diameter greater than the ex ternal diameter of the gun barrell whereby the barrel is movable through said ring, and a` ring 25 carried» by the barrel and disposed in the sup porting ring. AUGUST DABRASKY.