US1734152A - Primer lock - Google Patents

Description

Nov'. 5, 1929.

PRIMER LOCK Filed Feb. 8, 1929 A1-rn RN EY E.V BA RTL-:Ll 1,734,152.

Patented Nov. 5, 1929 ERICH BARTELS, 0F. DUSSELDORF, GERMANY; SSIGNORTO THE FIRM OF RHEINISCHE METALLWAAREN- UND4 MASG'HINENFABRIK, OF DUSSELDOBF-DERENDORF, GER- MANY PRIMIEB LOCK` Application filed February 8, 1929, Serial No.

The construction of" a primerl lock.` with trigger7 that is to say Athe .construction ofzthe most important and simultaneously the most sensitive portion: of the breech mechanism of a' gun is `clearly determined by` thel fact, that all details must be limited innumber. asfar as possible and must beeasily exchangeable, so las to adapt' the gun for services in the'iield. Particularly all `the'diilierent elements of. the primer lock must be` arranged as close together aspossible, so as to require for their reception the smallest possible bore inA the breeclrmechanism, thereby effectively opposing an. unnecessary reduction ofr the strength of the breech portion.

The object of the present invention is to provide a device which answers all purposes indicated above.

lVith regard to known constructions the device according-to the invention is'characterized bythe actthat the trigger is arranged inthe plunger-like percussion hammer and by a particular formation of the latter which permits the arrangement of all members,` with the exception of the trigger shaft, in a single bore of the breechblock. Hereby it is possible to remove or insert the primer loclc while the breech mechanism is closed whichmaysbe-elected by simply disengaging the protecting cover which serves as an abutment for the main spring andf is 4bayonet-like arranged inthe breech' member. Moreover such a constructionrobviates a particular recess in the breech memberfor the reception of' a lock member.l arranged separately from thepercussion hammer.

The accompanyingdrawing shows'by way of example a device according to the invention as applied to a breech mechanism on a gun. i

Figure 1 shows a: part: sectional view of the primer lock with the triggerV in the position of rest; Figure 2 illustrates infpart sectional elevation the primer lock. in. theposition in which the trigger lever isfcompletely tilted, that istosay the main spring istensioned to a maximum rFigure 3 isa part sectionallview of the primer lock in the releasedf position; Figure 4 is a part sectional elevation of the device according to the invention showing 338,600,` andinGermany February 20, 1928.

the-diierent parts in the position they occupy at the beginning ofthe return movement of the lockinto'the position of rest after release of the triggerl lever.; Figure 5 is a cross section on line I--I` of' Figure l looking from the point of the percussion hammer; Figure 6 is a cross section also on line I-'I of Figure l, but looking in the directionrom the butt-:end of the percussion hammer; Figure 7 is a bottom plan View ofthepl'unger ;,Figure Srillustratesatop plan vieni of the plunger; Figure 9 shows elevationV of the trigger member and Figure l0 is aview, of the front-spring abutment looking from` the point of the percussion hammer.

The cylindrical; plunger body b'- of. the primer lock carries'atits front face `the point b1 of thepercussionhammer and` is slidably arrangedl in a bore ai of the breech mechanism a provided in the prolongation or ez;- tensionY of the axis of the bore of' the gun. Rotation o1E the longitudinally movable plunger I) is prevented by a nose Z22 slidingly engagingv a corresponding groove` of the wedge member. A part ofthe plunger Z) is providedwith: a bore for the reception of the main spring f. A cover a2 connected bayonet-like to the breech member serves as fixed rearward abutment for the spring f. The front end of-thespring fbears against a disc 0 arranged'with a certain play in the bore b4 of the plunger b; The disc e carries at its lower part an eye c1 snugly litt-ing a longitudinal slot fof the plunger body A conical pin d of small;` diameter, arranged normally to a vertical' plane passing through the axis of the percussion hammer, is extended through the holeof the eye el. Hereby it is possible t-,o tilt the disc c about a certain angle rearwardly with regard to the vertical cross wall; b3 ofthe plunger body Z2. Furthermore'the face of the disc c directed towards thel point b1, of the percussion. hammer carries a cam-c3 which-extendsthrough a bore bs ofV the plunger vbody b and bears against the slide`- face g1 of the trigger gthe pivot pinv g2 ofA which is rotatably arranged in the plunger body b. y As the main springis inserted? under a certain tensiointhe trigger g, positively engagesthacam` 03; of the disc c Meer d bled.

lever gg'hinged to the trigger g, causes the cooking or the tensioningandfthe release of the primer lock when the trigger shaft `is rotated. Finally, after trigging` and after the plunger body b has beenr suddenly moved forward, the trigger shaft is, after release of the trigger lever, rotated backwardly, whereby the cam disc e is also returned, so that the of the recess Z912 of the plunger body b, whereby this body, mostly under the influence of'a torsional spring connected to the trigger shaft, is returned to its position ofrest.

During the release period the cinematic movements of the several parts of the primer lock are carried out in the order shown in Figures l to 4.

When in the so called position of rest (Figure l) the primer lock is to cock and to re- Y lease, the trigger shaft is rotated in the direction of the arrowA e shown in Figure l, whereby the cam disc e, rigidly connected to the trigger shaft, is also rotated in the same sense. As the face e3 of the cam disc e engages the finger lever g3 of the trigger g, journalled inthe plunger body b, the initiated torque causes a longitudinal backward movement of the plunger body b and therefore the cooking ortensioning of the main spring f. This movement is continued until the shoulder surface e4 of the came disc e coincides with the plane'passing through the surface g5 of the finger lever g3 hinged to lthe trigger g (Figure 2).. When this position i's reached the plunger body isV suddenly moved forward under the action of'thespring f, whereby the pointV b1 of thejpercussionY hammer is brought linto the priming position (Figthe primer lock a to allow the opening 'ofthe breech member. To effect'fthis, the trigger shaft is under the action of a torsional spring not shown in the drawing by which, after re'- Vlease of the' trigger-"lever, this lever and -therefore the trigger shaft also are'returned to the original position; When during this rotational movement the trigger shaft occupies the position shown in Figure 4, the stop surface. e2 of the cam'disc e, rigidlyv connected' Y to the trigger' shaft, bears against the wall of a-rec'ess `of the plunger `body b, whereby this body and with the same the pointl of the `percussion hammer is,v untilthe final exit positionl of the trigger leverl (Figure 1)' is `reached,'forc'ed backinto the plunger body so far, that the point b1 ofthe percussion ham- 1 mer doesnot longer eXtendintoYt-hepath of the breech mechanism in the bottom piece of the barrel. During this time the nger lever g3 occupies with regard to the cam disc the position required for effecting again the pulling of the trigger. For this purpose the main spring is inserted with a 'certain tension, so that Vthe came2 of the front-disc e, tilting-about a certain angle around the axis of the pin positively engages-the surface g1 ofr thertriggerrg. 'Ihe finger lever g3, rigidly connected to the trigger g, rolls along the surface e3 of the cam disc `until the A trigger lever or the trigger shaft occupies the second cam face e2 of same engages thewall original position and the nger lever g3 engages behind the cam disc e3 occupying thereby'with regard to this disc aposition which again allows pulling ofthe trigger. What I claim is: l l. VIn a primer lock for thebreech mechavnism of a gun, in combination a percussion hammer slideably fitting said breech mechanism, a cam disc fixed upon a spring actuated *Cookino shaft rotatably arranged in said breechlblock, trigger ournalled in said percussion hammer and. cooperating with said cam disc, a spring located in a bore of said percussion hammer, a disc forming a bearing for said spring and swingably arranged in said bore and a cam on said disc cooperating with said trigger. v Y

, 2. In a primer lock for the breech mechanism-of a gun, in combination a percussion hammer slidably fitting said breech mechanism, a cam disc fixed upon a spring actuated cooking shaft rotatably arranged in said breech block, a triggerjournalled in said percussion hammer, said disc having a plurality of cams some' ofwhieh cooperate with an 'arm'eXtending from said trigger and one of which being adapted. to enter a recess of said percussion'hammer, so as to. allow retraction of said percussionv hammery after firing, a spring located lin aV bore ofsaid'percussion hammer, a disc formingsabearing for said spring and swingably arrangedin Vsaid bore and a cam on'said'disck cooperating with a Yprojection provided Yon' said trigger.

' VA primer lock as set forth in the pre-V ceeding claims, in which said rcam disc is formed Vasa double rarmed lever Yone arm of which, during rotationiof s aidcocking. shaft Y for the ,purpose offcockingsaid percussion hammer, presses uponsaidtrigger and the ...other armtof which, during the automatic return ofthe cooking shaft after release of thewtrigger vand advance ofthe percussion Y. bolt,fpress'es againstla stop ofsaidpercussion hammer for retracting said latterinto Va safety position, wherel'ip'onV said cam disc occu- -pies a position lin front of said Vtrigger and said YYstop' ofv said percussion hammer.

' In testimony whereof I have affixed my signature. Y

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