US2270534A - Time fuse for artillery projectiles - Google Patents

Time fuse for artillery projectiles Download PDF

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Publication number
US2270534A
US2270534A US253207A US25320739A US2270534A US 2270534 A US2270534 A US 2270534A US 253207 A US253207 A US 253207A US 25320739 A US25320739 A US 25320739A US 2270534 A US2270534 A US 2270534A
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US
United States
Prior art keywords
axis
masses
balls
fuse
spiral
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US253207A
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English (en)
Inventor
Kunz Paul Albert
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
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Publication of US2270534A publication Critical patent/US2270534A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/02—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/02—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means
    • F42C9/04—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor
    • F42C9/041—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition the timing being caused by mechanical means by spring motor the clockwork activating a security device, e.g. for unlocking the firing-pin
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored

Definitions

  • the invention relates to a mechanical fusefor artillery projectiles, having a timing gear in which moving masses serving to bring about ignition of the charge drive the timing gear under the action of centrifugal force, the masses moving in a spiral path lying in a paraboloidal or approximately conical surrounding surface up to the moment of direct actuation of the igniter.
  • the present invention seeks to overcome this fault by guiding several centrifugal masses used on the above lines, not in the same spiral track, but each in its own spiral track and in such a way that all are always at the same running level, so that the masses form a movin or drive system which is symmetrical to the axis of the projectile and the driving eifect of which remains unaffected by decentring or the like.
  • Figure 1 is a view, partly in elevation and partly in longitudinal section, of the fuse.
  • Figure 2 shows a diagrammatic plan view of the spiral tracks or grooves, on a somewhat smaller scale than Figure 1.
  • Figure 3 shows a diagrammatic development of the spiral grooves for the two masses.
  • Figures 4 and 5 are views corresponding to Figures 2 and 3 of the known arrangement having a common spiral groove for the two masses.
  • Figure 6 is a diagram showing the driving torque relationship of the masses in the case of the invention.
  • the fuse body I ( Figure 1) carries the timing gear 2, of which the first wheel is shown at 4.
  • the timing gear 2 is driven by a conical driving wheel 6 of which a toothed rim 1 meshes with the wheel 4, and which is provided on its conical periphery with longitudinal grooves.
  • the wheel 6 itself is driven by means of two moving masses in the form of balls 5a, 5b, which are guided by the grooves in the driving wheel 6, and under the action of centrifugal force run on a conical surrounding surface in the fuse body I, each in its own spiral groove I2, l3 respectively and always at exactly the same height or level as the other, so that the two masses or balls form a moving system exactly symmetrical to the axis of the fuse.
  • one of the spiral grooves communicates with an outward passage 8 into which the respective ball enters at the end of its movement and engages the firing pin 9 which has been retained in the usual way and which when it strikes the primer Ill ignites the explosive charge through the fire conduit II.
  • the ogival cap 3 which is provided with a suitable time scale.
  • This cap is connected with the timing gear 2 which is held friction tight in the fuse body I. Since the wheels and the escapement of the timing gear are before discharge of: the projectile locked in known manner by various locks arranged to be released by inertia and centrifugal effects, thewheel 4 moved bodily with the cap when the latter is turned, carries with it the toothed rim 1, the driving wheel 6 and the balls 5a, 5b, which are guided in the grooves of the wheel 6. Since the speed of rotation of the driving wheel 6 is regulated by the timing gear, the running time is proportional to the angle a ( Figure 2) formed between the outward passage 8 and the ball 5a at the starting point, with the fuse axis as the vertex.
  • Figure 6 explains this fact.
  • the centres of the balls are indicated at 5 and 5
  • the projectile is decentred, that is instead of rotating about the axis A from which the two balls are equidistant at every corresponding point of their tracks, it rotates about some other axis, say A.
  • Fa and Fb are then the centrifugal forces which act upon the respective balls 5 and 5 with A as the axis of rotation.
  • Their magnitudes have been marked in proportion to the distance of the balls from the axis A (the balls have the same diameter and are identical in mass).
  • the lines 5a--d and 513- are equal to the components fa and fb of the forces Fa and Fb, acting normally to the spiral tracks at the points of contact of the balls, and the components fa and fl; represent the driving forces perpendicular to the direction Sw-A and bA. If a perpendicular be dropped from A on to the line 5b--A5a, four triangles are formed, pairs of which are congruent, namely the triangles 5a, fa, Fa, and 5a, A, d on one hand, and 5b, fb, Fb
  • ing tracks being at substantially the same radial distance from the projectile axis and in substantially the same plane normal to said axis, whereby a plurality of gear-driving systems disposed symmetrically of said axis is produced.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Gears, Cams (AREA)
  • Micromachines (AREA)
  • Transmission Devices (AREA)
US253207A 1938-02-22 1939-01-27 Time fuse for artillery projectiles Expired - Lifetime US2270534A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK149691D DE673718C (de) 1938-02-22 1938-02-22 Mechanischer Artilleriegeschosszuender

Publications (1)

Publication Number Publication Date
US2270534A true US2270534A (en) 1942-01-20

Family

ID=7251969

Family Applications (1)

Application Number Title Priority Date Filing Date
US253207A Expired - Lifetime US2270534A (en) 1938-02-22 1939-01-27 Time fuse for artillery projectiles

Country Status (7)

Country Link
US (1) US2270534A (en))
BE (1) BE432575A (en))
CH (1) CH208972A (en))
DE (1) DE673718C (en))
FR (1) FR842699A (en))
GB (1) GB508296A (en))
NL (1) NL50419C (en))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095529A (en) * 1977-02-17 1978-06-20 General Electric Company Setting ring stop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4095529A (en) * 1977-02-17 1978-06-20 General Electric Company Setting ring stop

Also Published As

Publication number Publication date
CH208972A (fr) 1940-03-15
FR842699A (fr) 1939-06-16
BE432575A (en))
NL50419C (en))
GB508296A (en) 1939-06-28
DE673718C (de) 1939-03-29

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