US718050A - Gun-mounting. - Google Patents

Description

PATENTBD JAN. 6v, 1903.

loperates with taper passages' on the hollow UNrTED STATES ARTHUR TREVOR` DAWSON AND GEORGE THOMAS BUCKHAM, WEST- MINSTER, LONDON, ENGLAND, ASSIGNORS TO VIOKERS SONS & MAXIM,

LIMITED, VOF LONDON, ENGLAND.

GUN-MOUNTING.

Sl?llG.`[I:`JGA'.'DIO N` forming part of Letters I atent No. I718,050, dated January 6, 1903.

Original application filed DecemberlljlQOl. Serial No. 85,296.

No.12'h591.

To all whom it may concern:

Be it known that we,ARTHUR TREvoR DAW- SON, lieutenant of Royal Navy, and GEORGE THOMAS BUCKHAM, engineer, both residing at 32 Victoria street,Westminster, in the count-y of London, England, subjects of the King of Great Britain, have invented certain new and useful Improvements in and Relating to Gun- Mountings, of which the following'is a, speci cation.

This inventionrelates to quick-firing and other gun mountings that are provided 'with a hydraulic buler for absorbing the energy of recoil and a recuperator for running the gun forward to firing position after recoil. The chief object of our invention is to provide means for controlling the velocity with which the gun runs forward after recoil, said invention being applicable to that form of' recoil-buer in which the cylinder has a hollow piston-rod and a retarding-ram extend-1 ing inwardly from one end of the cylinder into the said hollow piston-rod. The piston is partly 4withdrawn from the ram during re' coil, thereby leaving in' the piston-rod a space which becomes filled with liquid that must be displaced by the ram w-hile'the gun is being run forward after recoil, provision being made for the displaced liquid to be forced through a restricted passage, thus controlling the velocity with which the gun is returned to lits firing position. In the specificationof another application for patent, Serial No. 85,296, of 1901, we have described for accomplishingv this purpose means whereby the liquid in the hollow -piston-rod can only escape baclto the recoil-cylinder through an opening or'passage which gradually diminishes in area during the forward movement of the piston as the gunregains its firing position. According to our present invention we for this purpose provide Ithe inner end of the aforesaid'ram with a valve arrangement which copiston-rod, as hereinafter explained.

In the accompanying drawings, Figure l is a longitudinal section of a recoil-cylinder pro- Aendof said cap c3. q hole c5, Within a. space c7 provided for its re- `videdwith our improvements. Figs. 2 and Divided andthis application liled October 16, 1902. Serial l (No model.)

spectively, on the lines l 1 and 2 2.

A is therecoil-cylinder; B, the hollow pis-v` 3 are transverse sections thereof, taken, re-

ton-rod; B', itspiston C, the ram, which pro- A jects from one end of the cylinder and enters the hollow piston-rod.4v

A is the key within the cylinder A,- and B2 the aperture in said piston, that 4acts in conjunction withsaid key for increasing the resistance to the recoil as'said pistontravels in the cylinder during the recoil movement ofthe gun. A

C is the lng or bracket on the gun, to which the piston-rod is secured.

b b are inclined passages thehollowpiston-rod and serving to connect the annular space existing between the ram C and the hollow pistonrodwith the space a in the cylinder A behind the piston.

Along the interior surface .of the hollow formed through piston-'rod are formed one or more longitudil nal taper grooves 66, which open at their ends of greater area into the passage or passages I b, through which communication is established between the space a of the recoil-cylinder and the interior of the hollow piston- A rod.- The said taper grooves extend rearwardly and gradually diminish in area until 4they merge into the cylindrical inner surface of the hollow pistonrod at about the point la7.

b5 is a vnon-return valve at the inner or rear end o2 of the ram, at which end said ram isfurnished with a cap c3, whose outer' diameter ts the interior of the hollow piston-rod B and is formed with a longitudinal groove or passage c4. The end c2 of the ram is also formed with a central hole c5, which extends forwardly and diverges at c to the circumference ata point in advance of the forward At the mouth of the said ception, is located the non-return valve b5.

The end of the said cap'c3 is perforated at o8 cs to permit of liquid reaching the said space c7 from the interior of the hollow piston-rod. During recoil of the gun the pressurein the.

space ct ofthe cylinder Aforces the liquid 95k through the passageb in the piston-rod Binto the annular space around the ram C, thence through the holes c6 c5 in said ram, past the valve b5, and through the perforations c6 in the 'cap c3, whereby said liquid reaches the space within the hollow piston-rod and keeps it filled with liquid as the rod is withdrawn from the rain C. O n the completion of the recoil and in the return movement of the gun the aforesaid valve b5, under the pressure of the liquid within the hollow piston-rod, closes the passage c5. Consequently the only way of escape left for the liquid from said hollow piston-rod is by the small groove c4 in the cap c3 and the taper grooves b in the pistonrod, leading to the passages b. Asthese grooves be gradually diminish in area, it follows that during the return movement of the piston and its rod the gun will be very gradually brought to rest as it terminates its forward movement.

What we claim, and desire to secure by Letters Patent of the United States, is-

In recoil apparatus for guns, the combination with the ram and the hollow pistou-rod 'having passages therein capable of communicating with the interior and exterior of the said hollow piston-rod, of a non-return valve located near the inner or rearward end of the ram and of a perforated cap having a chamber inclosing said non-return valve and communicating with a passage in the ram leading to-opposite ends of said perforated cap; said cap being of a diameter to t the hollow piston-rod and formed in its periphery with a longitudinal' passage adapted to coperate with a tapered passage in the interior of the hollow piston-rod, substantially as and for the purpose specified.

In testimony whereof we have hereunto set our hands, in presence of two subscribing witnesses, this 6th day of October, 1902.

ARTHUR TREVOR DAWSON. GEORGE THOMAS BUCKHAM. Witnesses:

HENRY KING, PHILIP MANN.

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