US1171099A - Trunnion-blocks of gun-mountings. - Google Patents

Description

A. T. DAWSON & G. T. BUCKHAM.

TRUNNION BLOCKS 0F GUN MOUNTINGS. APPLICATION FILED AUG. I7. 1912.

l 1 7 l ,099. Patented Feb. 9.16.

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TRUNNION BLOCKS OF GUN MOUNTINGS.

APPLICATION FILED Aue. I1. 19I2.

Patented Feb. 8, 1916.

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'UNITED sTATEs PATENT oruron ARTHUR TREVOR DAWSON AND GEORGE THOMAS BUCKHAM, 0F WESTMINSTER, LONDON, ENGLAND, ASSIGNORS T0 VICKERS LIMITED, OF WESTMINSTER,

ENGLAND.

Specification of Letters Patent.

Patented Feb. 8, 1916.

Application filed August 17, 1912. Serial No. 715,583.v

To all whom t may concern:

Be it known that we, ARTHUR Tnnvon DAWSON, knight, and GEORGE THOMAS BUCKHAM, both subjects of the King of Great Britain, residing at Vickers House, Broadway, Vestminster, in the county of London, England, havev invented certain new and useful Improvements in or Relating to the Trunnion-Blocks of Gun-Mountings, ofwhich the following is a speciication.

This invention relates to trunnion blocks for use with gun mountings (particularly pedestal mountings) in which the gun and its cradle are adapted to be drawn in a rearward direction when it is desired to bring the trunnion blocks out of their recesses in the side cheeks of the carriage for the purpose of housing the gun.l y

According to our invention we provide each of Vthe trunnion blocks with a locking member which is situated in front of the trunnions instead of to the rear as heretofore, and which is adapted to be actuated, either directly or through gearing, by a handle that moves the locking member into or out of engagement with a part of the carriage. The recess in the side cheek of the carriage with which the front portion of the trunnion block engages is so formed that the said block is surrounded by the metal of the carriage cheek, and the locking member .is carriedin a transverse gap in the trunnion block in such a manner that it can en1 gage with the carriage `cheek in two places. By these means the necessary resisting sur- 4face yand strength of the locking blocks is obtained by one member and the carriage can also be made much shorter at the front. The said handle may, as has heretofore been proposed, be so constructed that vit cannot be removed unless the locking member is in the locking position and is so arranged that when the locking member is in the unlocked position the sight is prevented from being placed in its holder;` thus the gun cannot be sighted and fired before the Vtrunnion blocks are locked'to the side cheeks of the carriage.

Each of the trunnion blocks maybe fur-1 f nishedA with a bush in which the trunnion iseccentrically mounted, sol that byaltering the position of each of the bushes in the trunnion blocks the trunnions can be adjusted as regards the distance of their axes from the axis of the center pivot about which the gun moves in training, for the purpose of balancing the total load about the pivotas would be required in such circumstances for'example as the removal or addition of a shield. A

In order that our said invention may be clearly understood and readily carried into effect we will describe the same more fully with reference to the accompanying drawings in which Figure 1 is a longitudinal vertical section showing a trunnion block, furnished with our improvements, in position in the recess provided for it in the cheeks of the carriage. Fig. 2 is a transverse section taken approximately on the line 1, 1 of Fig. 1. Fig. 3 is a transversesection taken approximately on Y Vthe line 2, 2 of Fig. 1, the locking member for the trunnion blockl being shown in the locked position. Fig. 4 is a view similar to Fig. 3 showing the locking member in the unlocked position, and` Fig. 5 is a horizontal section taken approximately on the lineB, 3 of Fig. 1. Fig. 6 is a side elevation, and Fig. 7 a plan showing the manner in which the sight is prevented from being placed in its holder when the actuating handle of the locking member is in place, and the locking member is in the unlocked condition.

In these figures, A is one of the side cheeks of the gun carriage, B the cradle and C one of the trunnions.

D represents one of thetrunnion blocks and D thezbush in which the trunnion is eccentrically mounted.

E represents the locking member and E its actuating handle.

The locking member E is in thev example shown in the form of a disk with two fiattened parallel portions on either side of its center, the width of the member at this point being slightly less than the width of the trunnion block D and consequently ythan thatof the trunnion block recess into which the front end of the trunnion block fits. The locking member En is disposed within `a transverse gap e in the said frontend of the trunnion block and is rigidly mounted on a spindle e', carried longitudinally in the said block.v The walls of the carriage cheek are formed with vertical slots a, a. which,lwhen Y the trunnion block is in its foremost position, lie opposite the locking member E, so

that whenv the latter is in the horizontal or locking position shown in Figs. l to 3 its ends engage in the slots a, a and prevents the trunnion block D from being displaced.V Whenthe locking member.V is in the verticalV4 position shown in Fig. 4c, its ends are rearrow in Fig. l. The spindle carrying the I tion in a straight groove d (Fig. 5)A in the locking member E is provided at its rear end with a bevel segment 'e2 (Fig. 5) gearing with a lbevel pinion 62X on a transverse spindle ex carried by a bracket DX connectedto the trunnion block D. The outer endV of the said spindle is made hexagonal to vreceive a lsimilarly shaped` socket eX onthe shank of the actuating handle E". a

To prevent the handle from being removed froni the spindlev ex unless the locking member E is in the locked position the socket 6X is preferably provided with a lug or projection e3 which is adapted to engage during the placing of the handle in posibracket DX and during the locking movement of the handle, in a circumferential groove d* in the inner surface of the said bracket. The

Ishank of `the said handle.l projects vlaterally fromthe mounting'in such a'manner vthat it occupies a position that prevents the sight F '(shown'in chain lines in Figs. 6k and' 7) from being placed in the holder F It will thus be evident that as the handle EX` can f be withdrawn Vfrom its position on the spindle ex yonlyvwhen the locking member E' is Vin the locked position, the sightl cannot be placed in its holderand the gun consequently cannot be sighted, when the handle is in place andthe locking memberis in the unlocked position.

parts is shown in Figs.'V 6 and.

The herein described forml ofr trunnion block enables the trunnionsy to be carried right through the 'side cheeks. of ythe carriageand an vextension CX to be formed on the 'same for supporting the sight. The aforesaid bush D in which the trunnion is eccentrically mounted is, inthe example shown in Fig. l, of elliptical shape and has between it and the bearing d a number Vof.

`rollers carried in a cage d2. Inl order to. adjustthe distance of thev trunnions from the axis vof the vertical vtraining pivot kto Y compensate for lack of balance, `each of the trunnion blocks is removed andthe elliptical bush Dtaken out ofl position inA theV trun.

nion block, turned over so'that its forward part occupies a position toward therea'r. and

This condition ofthe is then replaced, when it is obvious that the position of the Atrunnions will.l be .moved either forward or rearwardl with-respect to the training pivot as required.

' trunnion blocks and situated in front of the trunnions which'pass through the trunnion blocks, means for moving said members into and out of engagement with slots formed` in the side walls of the longitudinal recesses, and sight supporting extensions on the trunnions, said extensions passing through slots in the outer side walls of said recesses for the passage of said extensions when the gun is being housed and replaced in position.

2. In a gun mounting, the combination of v the carriage side cheeks, trunnion blocks slidably disposed in longitudinal recesses therein, the said recesses being so rformed that the forward ends of the trunnion blocks are surrounded by the walls Lof the recesses, locking members carried by the trunnion blocks and situated in front of the trunnions which pass through the trunnion blocks, means for moving said members into and out of engagement with slots formed in the side walls of the longitudinal recesses, `and sight' supporting extensions'on the'trunnions, said extensions passing through slots in the outer side walls of said recesses for the passage of' said extensions when the gun is beingl housed and replaced in position.

3. In agun mounting, the vcombination of the carriage. side cheeks, trunnion blocks slidably disposed in longitudinal Arecesses therein, the trunnion blocks and situated in front of rotary 'locking membersl carried by the trunnions which pass throughthe trun-V nion blocks, means for moving said meinbers into and out of rengagement with slots formed iii the sidewalls of the longitudinal recesses, and sight supporting extensionson the trunnions, said extensions through slots in the outer'side-walls of said recesses for the passage of said extensions when the gun is being housedv and ,replacedl in position.

passingy r` 4:. Ina gun mounting, the combination of 5 the carriage yside cheeks, trunnion blocks slidably disposed in longitudinal recesses 120 therein, locking kmembers carried by the trunnion blocks and situated in front ofthe trunnions which pass through the trunnion' i blocks, sight supporting extensions on the trunnions, said extensions passing through slots in the outer side. walls of said recesses for the passage, of said extensions-when tha i gun is vbeing housed and replaced in posi "ftion, and means carried by the jtrunnion blocks vand situated in front of' said Vexten-l lthe carriage side cheeks, trunnion blocks slidably disposed in longitudinal recesses therein, the said recesses being so formed that the forward ends of the trunnion blocks are surrounded by the walls of the recesses, locking members carried by the trunnion blocks and situated in front of the trunnions which pass through the trunnion blocks, sight supporting extensions on the trunnions, said extensions passing through slots in the outer side walls of said recesses for the passage of said extensions when the gun is being housed and replaced in position, and means carried by the trunnion blocks and situated in front of said extensions for moving said members into and out of engagement with slots formed in the side wall of the longitudinal recesses.

6. In a gun mounting, the combination of the carriage side cheeks, trunnion blocks slidably disposed in longitudinal recesses therein, rotary locking members carried by the trunnion blocks and situated in front of the trunnions which pass through the v trunnion blocks, sight supporting extensions on the trunnions, said extensions passing through slots in the'outer side Walls of said Gopies of this patent may be obtained for vented from being placed in position when the locking member is in the unlocked condition.

8. In a gun mounting, the combination of ay trunnion block, a locking member for said block, an actuating handle for said member, and a sight support so positioned in relation to the handle that the latter prevents the sight from being placed in position when the locking member is in the unlocked condition.

9. In a gun mounting, the combination with the side cheeks of the carriage, of a trunnion block mounted therein, a bush in which one of the gun trunnions is eccentrically mounted, and means for enabling the said bush after having been withdrawn from the trunnion block and inverted to be replaced in the block with the gun trunnion in a di'erent position relatively to the side cheeks.

10. In a gun mounting, the combination with the side cheeks of the carriage, of a trunnion block mounted therein, and an elliptically shaped bush in which one of the trunnions is mounted, said block having an elliptically shaped recess to receive the bush in one or other of two positions.

l1. In a gun mounting, the combination with the side cheeks of the carriage, of a trunnion block mounted therein, an elliptically shaped bush in which one of the trunnions is mounted, said block havingan elliptically shaped recess to receive the bush in one or other of two positions, and a cage of rollers interposed between said bush and the trunnion block.

In testimony whereof we affix our signatures in presence of tWo witnesses.

' ARTHUR TREVOR DAWSON.

GEORGE THOMAS BUOKHAM.

Vitnesses:

HENRY KING, JNO. R. OASWELL.

ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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