US839778A - Recoil-operated firearm. - Google Patents

Description

No. 839,778. PATENTED DEC. 25 1906. G. LUGER.

REGOIL OPERATED FIREARM.

APPLICATION FILED MAB. 5. 1906.

UNITED STATES PATENT" @FFIQE. GEORG LUGER, or oHAahoTTnNBURe. GERMANY.

RECOIL-OPERATED FIREARM- Specification of Letters Patent.

Patented Dec. 25, 1906.

Application filed March 5, 1906. Serial No. 304.277.

To all whom it may concern:

Be it known that I, GEORG LUGER, a subject of the Emperor of Austria-Hungary, residing at 28 \Veimarer strasse, Charlottenburg, Germany, have invented new and useful Improvements in Recoil-Operated Firearms, of which the following is a specification.

This invention has reference to that class of recoil-operated firearms in which the breech-bolt is actuated by toggle-links, and the object is to provide improved spring devices for the toggle-links whereby the full efficiency of the spring tension and leverage will be utilized to close the toggle-links, but will be less effective as a retarding force when the links are opening in consequence of the recoil.

In the accompanying drawings, F gure 1 shows the parts in the positions they normally assumethat is, ,while the breechbolt and toggle-links are closed. Fig. 2 illustraites the open positions following the re= coi Referring to the drawings, the invention is illustrated as embodied in a small arm, althou h it is obviously adaptable to pistols and ot er firearms and to those employing a recoil movable barrel.

The letters 'm and n designate the togglelinks constituting the actuating mechanism for the breech-bolt v, the fulcrum of the rearward link being indicated at n. An S- shaped depending link a connects the to glelink 12. to the upper arm 7' of a bell-era lever fulcrumed at 0 in the gun-case. The sparing b (shown in the form of a helical t ust-sprin is secured at one end to the gun-case an at the other to the lower arm 71 of the bell-crank lever. The dotted lines indicate the distance between the fulcrum n and the line of action of the link a. in the two extreme positions of the breech-bolt.

In 0 eration when the breech-bolt is closed and tl ie other parts are in the positions shown in Fig. 1, and assuming the gun to be loaded, its discharge or firing will cause the breech-bolt to recoil or move rearwardly under the pressure of the powder-gases created by the explosion of the cartridge. At the same time the toggle mechanism will assume the position shown in Fig. 2 against the tension of the spring and the forces of the leverage. It will be noted, however, that as the toggles rise the line of action of link a ap-' proaches the fulcrum n and the arm '11 of the bell-crank approaches the line of the springaction. Thus the link, the bell-crank, and the spring assume the positions of least leverage and highest compression. In the return or closing movement of the breech-bolt the force of the compression-spring acts upon an increasing leverage of the arm i of the bellcrank and the link a. Consequently there is a double leverage between the spring and breech-bolt mechanism. It will also be noted that the full actions of the spring and leverage are about completed when the breech-bolt reaches its closed osition, save for sufiicient to hold the breec i-bolt closed. In this way too great pressure at the closing of the breech-bolt and the consequent tendency to rapid counter action are successfully obviated.

If desired, a plurality of springs b may be employed, or a plate-spring may be substi tuted for the helical compression member shown.

1 claim as my invention 1. In a recoil-operated firearm, the combination with the breech-bolt, and the togglelinks actuating said breech-bolt, of a sprin tending to hold said breech-bolt in its close position, and means for transmitting the power of said spring to said breech-bolt in multiplied ratio com risin a lever and a link pivoted to one of sai togg e-links and to said lever.

2. In a recoil-operated firearm, the combination with the breech-bolt, and the togglelinks actuating said breech-bolt, of a comression-spring tending to hold said breechiiolt in its closed position, and means for transmitting the power of said spring to said breech-bolt in multiplied ratio comprising a bell-crank lever having one of its arms secured to said compression-spring, and a link pivoted at one end to the rear toggle-link and pivoted at its other end to the other arm of said bell-crank.

3. In a recoil-operated firearm, thecombination with the breech-bolt, and the togglelinks actuating said breech-bolt, of a comression-spring tending to hold said breecholt in its closed position, and means for transmitting the power of said spring to said breech-bolt in multiplied ratio comprising a bell-crank lever having its fulcrum in the line of action of said spring and having its lower arm secured to said spring whereby when said arm is at the point of least leverage said spring is at its highest compression, and a I 5 link is at t e point of least leverage.

link connecting the u per arm'of said bellcrank to the rear togg e-link. 4. In a recoil-operated firearm, the combination with the breech-bolt, and the togglelinks actuating said breech-bolt, of a comression-spring tending to hold said breecholt in its closed position, and means for transmitting the power of said spring to said breech-bolt iii-multiplied ratio comprising a bell-crank lever having one of its arms securedto said com ression-spring, and a link pivoted to the ot er arm of the bell-crank and to the rear tog le at a point in advance of the fulcrum of t e latter, whereby when said sprin is atgits highest compression said 5. In'a recoil-operated firearm, the-combination with the breech-bolt and the togglelinks actuating said breech-bolt, of a s rin tending to hold said breech-bolt in its c ose position, a bell-crank lever having one of its arms secured to the s ring, a link connecting bell-crank to the rear ages of said bell-crank and link act on said breech-bolt in its closing movement and their least leverages are exerted when said breechbolt is open.

- In testimony whereof I have signed my name to'this specification in the presence of two subscribing witnesses.

, GEORG LUGER.

Witnesses V HENRY HAsPER, WOLDEMAR HAUPT:

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