US1362519A - Mechanical time-fuse - Google Patents

Description

U. WILC'K.

MECHANICAL TIME FUSE.

APPLICATION FILED SEPT. 7. 1920.

Patented Dec. 14,1920.

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men. TIHE'FUSE. I i i N Specification of Letters latent.

.Application filed se tember a ezo, Serial No. 408,744.

To all whom it concern Be it known that IIJLRIGH Win-ox, re-

.siding at Essen-Rellinghausen, Germany, a

- citizen of the German Republic,- have in-' vented a certain new and useful Improve- --ment in Mechanical Time-Fuses, of which the following is aspecification. v .-My invention refers tomechanical time fuses containing. a clockwork disposed Within an annular, adjustable casing. Theparticula'r characteristic feature. of the fuse consists in an arm coupled with anarbor of the clockwork such that the arm is permitted to axially shift on the arbor. The.- further characteristic feature of this arm 4 construction consists in means by which after the projectile is fired, the .arm is thrown, by means of a spring against an annular retaining member provided on said -adjustablecasing. Iti's the particular purpose of this invention to insure the operation of this arm so that the fuse will set offthe charge at-the time desired.

.In the accompanying drawings, an example of the invention is illustrated. In these drawings a Figure 1. shows an axial, longitudinal section through the fuse and r Fig. 2 shows a section on the line 2-2 in Fig. l seen from the top'. 7

Referring to the .drawings, A represents the main fuse body to which is suitably attached, by means of screws running in an annular groove of the body A, the annular adjustable casing B,which surrounds the clockwork. C is the main arbor of the clockwork which is hollow and which is erated by the clock spring D.' An-arm 1 is coupled with'arbor C so that it may shift thereon in axial direction, this-arm extending in opposite radial directions. The portion e of the. arm located at the right of arbor C (see Fig. 2) is broader and shorter than the opposite end e of the arm. The

arm is spring-controlled by means of a spring F located in the hollow arbor which spring tends to throw the arm toward the point of the projectile. Normally, this arm is prevented from moving axially on arbor C in well known manner by means of a lever G which is thrown out of engagement with the arm when the projectile is fired and which when locln'ng the arm, at the same time prevents rotation of arbor C bg clock spring D. The adjustable casing .the time fuse.

is provided at its upper portiodwitlr-an inwardly extending annular'B which carries an annular retaining member b "extendmg 1n a, plane in parallel to-the plane 1n which the arm rotates, andfwhich'is disposed closely adjacent 'thereto.; The member 12 is of suflicient width in: radial direction-that both ends e and e of arm E bear against it when the arm is shifted'u wardly under the influence ofs'pring .F. hei"central portion of member 6 is cutout such that it 'willpermit the arm, when in proper jalin'ement with this cut outportion, to pass through the retaining member.

As "will be seen 1n Fig. 2, portion 6 permits arm portion e to pass, and cut out portion 6 permits arm portion e to pass. At the outer end of the cut out port on. bal'so the cylindrical portion B is cut away as shown at 12 The general construction of ''the' clockwork and fuse mechanism is similar to those ,known in the art and its operation; is suchthat when arm E is rotated into such position that it properly registers withthe cut out portion' b it will be thrown u wardly under the' influence of spring F,

which sets the fuse mechanism into action.

When the projectile fired, lever G is disengaged inwell known manner from arm E.

so that arbor C is permitted to rotate under the influence of its clock spring D whereby at the same time arm E is thrown against the retaining member, 6 and commences to rotate with the arbor. This slight axial movement ofarm E against retaining member 72 is at first not sulficient to setloif the percussion cap. However, owing to the shape of the retaining member 6 described above, bothends e and e of arm E bearagainst theretainin'g, member so that the arm is subject to uniform pressure at both of i s ends which prevents jamming ofthe arbor and insures the smooth of the clockwork and thus certain operation of g .E. moves axially far: ther only whenthe clockwork has rotated arbor C sufficiently to bring thearm' into register with the correspondingly shaped portions b", b of retaining mem-;

cut out her If. i

'As soon as the arm- E, whichis rotated the clockwork" in the direction of ,the arrow -Y (see Fig. '2) has arrived under the'cut out portion b", b, it enters this cutout por tion under the pressure of sprmg F. :FAtthe same time the annular projection g on the arm E slides of? of the projection 2" on the lever J so that this latter swings outward under the action of centrifugal force. I This movement causes rotation of the spindle J At the same time shoulder 2' slides oii the collar It" of the firing bolt K and the firing bolt penetrates the primer under the action of the spring If. The time at which the perforation of the primer takes place is, as will be seen from What has been stated above. dependent upon the adjustment which has been imparted to the adjustable casing I and consequently the annular retaining member 5 To prevent the adjustment imparted to the adjustable casing from being lost when the shot is fired an arrangement is provided in the Well-known Way, by which the member 13 is 'immovably secured to the body A of the fuse by action of the discharge, when the gun is fired.

Adj ustment-between the casing 13 and base A is provided for by screws passing through the casing B. These screws carry pro ections which engage an annular recess in the base A.

I claim- 1. Mechanical time fuse of the character described having a clockwork for controlling the operation of the fuse mechanism, an adjustable casing surrounding said'clockwork, an arm coupled at itscenter With-an arbor of said clockwork and having. free- (10111 of movement on saidarbor in axial direction thereof, a spring suitably disposed and tending to axially move said arm on said arbor in a given direction, a retaining member on said casmg'adapted to contact with both ends of said arm and tending to normally prevent such axial movement of said arm, said retaining member having a. central cutaway portion to permit axial movement of the arm when the latter is rotated to register with said out awayportion. 45

2. Mechanical time fuse of the character described having a clockwork for control ling the operation of the fuse mechanism, an adjustable casing surrounding said clock work, an arm mounted u" on an arbor of said clockwork, 'said arm eirrg capable of axial movement in one direction, means nor.-

mally tending to axially move the arm on said arbor, a retaining member on said casing adapted to contact with said arm. at both ends thereof to normally prevent axial movement of the arm, said retainin memher having a cutaway part permitting-the axial movementof the; arm when the latter is rotated to register wlth-the cut away portion.

The oregoing specification si ned at Essen, Germany, this 18th da of L y, 1920.

In presence if- Hans Gorrsmnn, Josnr *Onsnnrz.

ULRI H WILCK.-

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