US2356554A - Time-setting device for fuses - Google Patents

Description

Au 22,1944. I ,,V 5132 2,356,554

TIMESETTING DEVICE FOR FUSES 7 Filed 001:. 25, 1941 m/vs/v TOR A ADOLF Wnsz Patented Aug. 22, 944

UNHTED 'rEs PATENT ECE 2,356,554 TIME 'sETTiNG DEVICE FOR FUSES Adolf Weisz, Budapest, Hungary;

vested in the Alien Property Custodian Application October 25 1941, sen-9.1m.

Hungary July 1941 7 Claims. (01. 161' 1) the fuse.

The principal object of the invention is to simplify the construction of the time setting device so that was set going as will prevail even against Wrong manipulation.

With the foregoing objects in view, together and advantages as may invention resides in the parts and features, and in the combination, conof clearness of illustration.

Fig. 2 is a diagrammatical top view of the same device.

Fig. 3 is a cross section taken on the line 3-3 of Fig. 1 as seen from below.

Fig. 4 is a diagrammatic cross section taken on the line l4 of Fig. 1 as seen from above,

Figs. 5 and 5 are diagrammatic illustrations of details in connection with the toothed wheel 29.

Only the toothed wheel I 3 carand. the escapeinent-whe el I 4 of the well-known clockwork up the clockwork. ried by the shaft l2 are shown as part coincides with the arm 25. The upper end of the cylinder extends to form a disk 25 in contact with the lower face of toothed wheel l9.

transmission wheels 29, 30, (M32 to a longer pointer 33 whereby more exact setting and reading positions of slot 20 is obtained.

excentrical pointof wheel 29 by asbring 42, 'Fig, '5, which tends to bring these two points nearer to, or if desired farther from, each other the pointer 28 rotating together with the cylinand thereby to turn the loosely mounted wheel 29' der transmits the rotation through the train of about the shaft 26 which is rigidly connected wheels 29 to 32 also to the pointer 33 so that with wheel 29. of course, the pins of pinwheel both pointers wander back with the course of 39 in mesh with the double wheel will not allow 5 time, and from their position one can read at an angular movement between the individual any moment the time which has still to pass wheels 29 and 29 greater than determined by the till the shorter pointer 28 will reach the position fact that the pins of wheel 39 are embraced on marked 9 and the arm 2| can snap into the both sides without play by the teeth of the double slot 29 so as to allow the bolt 22 to penetrate wheel 29, 29 as shown in Fig. 5 10 into the cavity of cylinder l8 which movement As shown in Figures 1 and 4, near by and above results in firing the fuse.

the escapm nt-wheel H, a two-armed lever 34 With a view of providing safety against an is 50 ou p a p ot 35 se ed o p te l5 untimely release of bolt 22 by an accident such a t y be rocked between two t p as voluntary wrong or improper manipulation of and in its position shown in Fig. 4, a nose 36 the pointers, precautionary measures have been downwardly projec i therefrom gh an taken to the efiect that if the spring H) has been opening 39 in plate 15 engages the teeth of the fully wound a predetermined amount of time will.

escapement-Wheel 14 so as to check the rotation have to pass before bolt 22 can be released. For of the latter and thereby stop the clockwork till thi urpose, the disc 25 which is integral with the lever 34 is swung in the direction of the a'Ir W 2'0 cylinder H! has a. peripheral nose 39 (see Fig. 3)

shown in Fig. 4 to set free the escapement-wheel. and whee1 19 has a pair of d wnwardly project- The clockwork C as illustrated by way of eX- ing stops 49 and 4| which are positioned to be amp e is SO de t When it i t giving, engaged by nose 39. In each case, when the dehe l n r p in 3 p rf rm n mplete ro- [vice is to be placed in operation, spring I9 is fully tation in twelve hours. The numbers I to 25 wound and this operation turns wheel |9 so that shown on the outer scale 33 of the dial-plate to the stops 49 and 4| are positioned as shown. be seen in Fig. 2 indicate therefore the pos ti n When in this position,v as cylinder H! is rotated O p in turn y t longer POinter 3 fro toward the position where release of bolt 22 takes hour to hour while the clockwork is going. The place, nose 39 is engaged by either stop 49 or transmission ratio between the longer pointer 33 stop 4|. Thus, for example, in Fig. 3, if pointer and the shorter one 28 is so calculated that dur- 28 is turned clockwise from the broken-line poing a. complete rotation of the longer pointer, sition, nose 39 will engage stop 49 before slot 29 the shorter one steps forward by one graduation comes into alignment with spring arm 2| to reonly on the inner scale 28 so that each gradu lease bolt 22. In this embodiment, nose 39 is tion on the inner scale corresponds to a duration 3r, not in alignment with pointer 28, there being of twelve hours, but in Fig. 2 every second gradan angle 5 between the nose and the pointer. It nation only is m r ed y a mlmber- Oh the will be seen from Fig. 3 that the angular distance inner scale, the gradation m rked oi c d a between stop 49 and the bisecting line of the with the bisecting line of the radial arm 2|, and radial arm 2|, which coincides with the graduathe shorter pointer indicates the momentary an- 40 tio m rked 0 f c l 23', is greater th gular distance of the slot .9 from arm 2|. With the unvariable angular distance 5 between the a view to allow the pointers to be set by hand nose 39 and the slot 29 which latter coincides in the usual clockwise direction in accordance with pointer 28. If therefore one would try to with the time appointed, the clockwork is so debring the pointer 28 to the position marked 9 signed as to rotate the pointers in the direction by turning the pointer 33 by hand in the direcopposite to the usual clockwise direction. hus, tion of the arrow shown in full lines in Fig. 2-- when the longer pointer 33 is rotated by hand this same direction appearing in Fig. 3, which till the shorter pointer reaches e. g. the graduarepresents a view as seen from below, in the option marked '72 and the clockwork is wound posite sense as shown in dotted lines--the nose up and set going by throwing the lever 34 out of 5 39 will strike against stop 49 and thus prohibit engagement with the escapement-wheel l4, the the pointer 28 from approaching the position clockwork will have to go on during seventy-two marked 0 to an angular distance less than 1-5. hours to carry the pointer 28 back to the position The stop 49 while being rotated by the clockmarked 0 so that the angular position of slot work, has to perform an advance corresponding 29 being always identical with that of pointer 5 to an angle 02- in its travel towards the gradua- 28, seventy-two hours must pass away till the tion marked 0 i. e. a time corresponding to an slot 29 will so coincide with the radial arm 2| as angle a-c has to pass away to enable the pointer to allow the latter; to snap into the slot. 28 to be brought into the position marked 9.

A positive driving connection being provided In case the value of angle 8 is reduced to zero, between the pointers and the cylinder l8, the (to i. e., the nose 39 and the slot 29 are disposed in cylinder slot 29 will exactly follow the rotation of the same radial plane, the angular distance a of the shorter pointer 28, when the pointers. are stop 49 from the graduation marked 0 will turned to be set for the time appointed. At the determine in itself the minimum of time the same time, the frictional coupling between cylinclockwork has to go before release of bolt '22 der l8 and toothed wheel l9 will allow the cylincan anyhow take place. der to be rotated without imparting rotation to When the clockwork is entirely wound up, the wheel l9 and to the train of wheels in connection stop 49 will take a position at a definite angular with the latter. On the contrary, when the clockdistance from the fixed mark .9 so that in a work is going and the wheel i9 is driven by the clockwork assembled and entirely wound up, the .mainspring shaft |2 through pinion H, the fricangle a has a definite value, and the angle 5 tional coupling between wheel I9 and disk 25, being invariable, also the angle a-B has a definite which latter is pressed against wheel l9 under value. Thus, for every setting device completely the combined action of the springy arm 2| and assembled and with its clockwork completely of the helical spring 24, will cause the cylinder wound up, there is a predetermined time which |8 to be carried by the "rotating wheel l9, and 7 must pass away afterthe clockwork has been set going, and which is independent of the time of firing determined by the occasional position of the setting member, before release of the member serving to initiate the firing can anyhow take place. However, every mechanician acquainted with the construction described may vary the value of angle and thereby increase or decrease at will the duration of security, by removing the pinion l1 and giving the wheel [9 a partial turn proportionate to the change desired before putting the pinion back in its place.

With a view to prohibit the pointer 28 from reaching untimely the graduation marked also when turned by inadvertence in the direction opposed to the arrow shown in dotted lines in Fig. 3 i. e. in the direction in which the numbers progress on scale 28, a second stop 4| may be provided on wheel IS in such an angular position as to allow the pointer 28 to be set also for the longest time i. e. for one hundred and ninetytwo hours in the example illustrated.

What I claim is:

1. A time-setting device for fuses, comprising a clockwork in combination wiith a setting member rotatably mounted and cooperating with a member having a fixed angular position in relation thereto to initiate a movement resulting in firing the fuse; a disk in positive driving connection with said clockwork and in frictional driving connection with said settin member, a hollow shaft upon which said disc is mounted, and a shaft located in said hollow shaft and providing a mounting for said setting member; springy means tending to induce one of said cooperating members to initiate the movement which results in firing the fuse and becoming operative in a predetermined angular position of said setting member in relation to the member having a fixed angular position; and means indicating the momentary angular position of said setting member.

2. A time-setting device for fuses comprising, a clockwork in combination with a setting member which is in the form of a hollow cylinder having a longitudinal slot therein and rotatably mounted; a springy arm cooperating with said slot and extending radially with respect to said hollow cylinder and tending to penetrate said slot, said springy arm having a fixed angular position in relation to said hollow cylinder and the movement of said springy arm being to effeet the firing of the fuse; a disc in positive driving connection with said clockwork and in frictional driving connection with said setting member; springy means tending to induce one of said cooperating members to initiate the movement which results in firing the fuse and becoming operative in a predetermined angular position of said hollow cylinder in relation to said springy arm; and means indicating the momentary angular position of said setting member.

3. A time-setting device for fuses, comprising a clockwork in combination with a setting member rotatably mounted; a member cooperating with said setting member and having a fixed angular position in relation thereto to initiate a movement resulting in firing the fuse; a disc in positive driving connection with said clockwork and in frictional driving connection with said setting member; springy means tending to induce one of said cooperating members to initiate the movement which results in firing the fuse and becoming operative in a predetermined angular position of said setting member in relation to the member haVing a fixed angular position; and means indicating the momentary angular position of said setting member, said setting member having a projecting nose and said disc having a stop cooperating with said nose to prevent the setting member from taking the angular position in which the springy means becomes operative, said stop being effective for a predetermined duration of time after said clockwork has been fully wound and placed into operation.

4. In a time-setting device for fuses, a clockwork having a predetermined initial position stop means carried by said clockwork and adapted to be in a predetermined initial position which is attained when said clockwork is fully wound, fuse-firing means has a frictional driving connection with said clockwork and including setting means to set the time of the firing of the fuse, and means carried by said setting means to cooperate with said stop means and preventing the firing of the fuse during a period of time after said clockwork has been started from said initial position.

5. In a time-setting device for fuses, a fusefiring unit having means which is moved through a variable angle to a fuse firing position, driving means including a frictional clutch having driving and driven elements for driving said means through the variable angle to the fuse firing position, and cooperating stop means on said driving and driven elements of said frictional clutch which is effective when said device is set for operation to limit the setting of said first named means whereby the driving means to a predetermined safety position and thereafter a predetermined time must elapse before said first-named means can be moved to the fuse firing position. v

6. Apparatus as described in claim 5 wherein said driving and driven elements are in the form of two disc means held in frictional engagement and the means cooperating therewith is in the form of a peripheral nose on one of said discs and a pair of axially extending pins upon the other said discs.

7. Apparatus as described in claim 5 wherein said driving means is a clockwork having a main spring which is completely wound thereby to move the stop means to said safety position.

ADOLF WEISZ.

may be moved

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