US2167302A

US2167302A - Barrel safety means for fuses

Info

Publication number: US2167302A
Application number: US129106A
Authority: US
Inventors: Junghans Helmut
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-03-04
Filing date: 1937-03-04
Publication date: 1939-07-25
Anticipated expiration: 1956-07-25
Also published as: FR818649A; NL44938C; GB483255A; CH196697A

Description

July 25, 1939. H. JUNGHANS 2,157,302

BARREL SAFETY MEANS FOR FUSES Filed March 4, 1957 32216123011' [L7/827710 @W5/ans A ZLZLo/wey Patented July 25, 19,39

Helmut Junghans, Schramberg- Sulgen,

` Germany Application March 4,

1937, Serial No. 129,106

In Germany March 4, 1936 l Claims.

This invention relates to a barrel safety means for fuses, and has for its object to utilise for the safety device the force of acceleration of the projectile.

According to the invention, the barrel safety device resides substantially in the fact that an element, which secures the firing pin in indirect fashion, is moved by the action of the force of acceleration into a position, only in which a releasing action of the said element is able to take place. In this connection the arrangement is preferably Vsuch that under the action of the force of acceleration the said element lags behind in relation to the movement of the projectile, and is not advanced to initiate the releasing action until the force of acceleration has ceased. Preferably, the said element is constructed as a spring-pressed bolt, which co-operates with a slide member blocking the path of the firing pin in the secured position.

In accordance with an additional feature of the invention the bolt possesses a disc, which is mounted in sliding fashion and rests in a corresponding recess in the slide. This disc rests on a fixed basefwhile in the other direction it is free, so that upon the movement of the bolt towards the rear under the force of acceleration it remains in the slide, but upon the forward movement of the bolt is also caused to be advanced. The slide member thus released is then able to move under the action of centrifugal or spring force out of the path of the ring pin.

An arrangement of this kind has the advantage that the element securing the flring pin in indirect fashion is itself secured, not by another part but by reason of its position, from which the same can only be moved by the force of acceleration.

A possible. embodiment of the invention is illustrated in the accompanying drawing.

Figs. 1 and 2 are cross-sections through the device according to the invention, Fig. 1 in the stationary and secured position of the parts and Fig. 2 in the position in which the parts in which they are acted upon by the force of acceleration.

Fig. 3 is a plan view of the device according to Fig. 1,

Fig. 4 showing the position of the parts after the release of the safety device, and

Fig. 5 being a plan view of Fig. 4.

Prior to the firing `of the projectile the firing pin is secured by the` slide b by the fact that the path of movement of the firing pin is blocked by a part of the slide. Through an opening b3, b1

in the slide b there projects a bolt d acted upon by a spring e which presses the bolt in the direction of movement of the projectile against a Vstop which is preferably constitutedby the plate g bearing the slide. On the bolt there is mounted a disc or ring c which is held resiliently so as to be shiftable thereon. This ring rests in a suitable recess bl in the slide b, whereby the slide is held against the action of a spring f in the position in which the firing pin is secured. The slide is also furnished with two openings, one for the passage of the-ring pin andthe other to,A receive the safety bolt d when the slide is movedv into the position of release.

The operation of the device according to the invention is asfollows: l

In the position of rest the slide b is secured against displacement by means of the resilient ring c mounted on the bolt d, such displacement also being unable to occur upon initiation of `the rotation. lUpon the ilrlng of the projectile, so long as the projectile is still within the barrel, or in other words so long as an accelerating force is effective, the bolt d is forced back, the spring e being compressed (Fig. 2). The bolt d is thereby displaced in relation to the ring c, the latter, however, still remaining in the recess of the slide b and accordingly securing the same. When the force of acceleration ceases after the projectile has left the barrel the bolt d again returns under the action of the spring e into its original position and thereby presses the ring c out of the slideb, the ring c not being supported in the forward direction. The slide member is thus released, and under the action of the centrifugal force or of the spring f itis able to move sidewards to allow the firing pin to pass through an opening b2 in the slide and through an opening g1 in the plate g.

It will be understood that no limitation is made to the specic form of embodiment shown, and that numerous modifications are quite possible within the meaning of the above description and the annexed claims without departing from the spirit of the invention.

Having now particularly described and ascertained the nature of my said invention, and in what manner the same is to be performed, I declare that what I claim is:

1. In a fuse for projectiles having a firing pin, a safety mechanism comprising a slide mounted in a plane generally at a right angle to said ring pin so that in one position it will intercept movement of the iring pin to ring position, a spring mounted to force said slide into non-intercepting position, a bolt mounted for movement parallel to the direction of the axis of the projectile, a device frictionally srippiilsqsaid bolt adjacent one end thereof and normally positioned thereon to-block movement of said slide to its non-intercepting position and thereby prevent operation of said firing pin, and spring means acting on said bolt adjacent the other end thereof in a manner to hold said bolt with the device in normal blocking position, said safety mechanism being so pro-'- portioned and arranged that nring of said projectile will cause setback of 4said bolt against action of the spring acting thereon and slippageof said device on said bolt whereby when acceleration of said projectile ceases said spring will force the bolt forward and carry said device out of blocking engagement with said slide and permit said slide spring to move said slide to non-intercepting position.

2. In a fuse for projectiles having a firing pin, a safety mechanism comprising a slide mounted in a plane generally at a right angle to said firing pin so that in one position it will intercept movement of the firing pin to firing position, a bolt mounted for movement parallel to the direction of the axis of the projectile, a device frictionally gripping said bolt adjacent one end thereof and normally positioned thereon to block movement of said slide to its non-intercepting position and thereby prevent operation of said firing pin, and

3. A barrel safety device fora fuse of projectiles having a firing pin, comprising a base member, a safety slide slidable on the member and memos having two openings therein, a bolt slidable in the base member, a locking member .mounted slidably on the bolt and normally extending into the slide in one of the openings to lock the slide from movement so that the nring pin contacts the slide and is prevented from movement. and means cooperating with the bolt which stores energy upon iiring of the' projectile but when the l projectile ceases to accelerate the energy in the means forces the bolt to slide in the base member to release the locking member so that the firing pin may penetrate through the other opening inthe sllde.-

4. A barrel safety device for a fuse comprising a plate. a safety slide slidable on the plate, a bolt, a locking member slidably mounted with friction on the bolt and extending into the slide to normally lock the slide from movement when the locking member is adjacent the plate, and a spring for the bolt, said locking member when the spring is energized by a backward movement of the bolt away from the slide being stationary but when the bolt moves in a forward direction toward the slide the member moves with the bolt to release the slide.

5. A barrel safety device according to claim 4, in which the locking member is in the form of a ring on the b'olt which has a tight fit thereon so part into which the bolt fits when the slide is released on forward movement of the bolt.

7. A barrel safety device according to claim 4, in which the safety slide is provided with an opening through which a firing pin may pass after the slide has moved upon its release by the bolt and locking member.

HELMUT JUNGHANS.