US2231581A - Percussion igniting device for clockwork fuses - Google Patents

Percussion igniting device for clockwork fuses Download PDF

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Publication number
US2231581A
US2231581A US217071A US21707138A US2231581A US 2231581 A US2231581 A US 2231581A US 217071 A US217071 A US 217071A US 21707138 A US21707138 A US 21707138A US 2231581 A US2231581 A US 2231581A
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United States
Prior art keywords
pin
clockwork
impact
ignition
fuses
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Expired - Lifetime
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US217071A
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English (en)
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Junghans Helmut
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Individual
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    • 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
    • F42C9/043—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 and the firing-pin being activated by impact

Definitions

  • This last-mentioned self destructive device is set for an unalterable period of time, which need not be absolutely precise. For this reason, there was no difficulty in arranging the barrel-safety device and the field or muzzle safety device, in such a way that the striking pin passed through the hub of the balance wheel, and served as a shaft for the latter. It was desired to increase the friction of the balance-wheel bearing, for producing a braking action, which necessitated the use of a strong pin.
  • the aim in view is to minimize the friction-in the balance-wheel bearing, that is to say, the balance wheel must be mounted on a very slender shaft.
  • the invention is based on the problem of making the striking pin as slender as possible at the part where it passes through the hub of the balance wheel. The only way, in which this problem can be solved is to provide a striking pin which is as slender either throughout its length, oronly at its end portion, as required for the mounting of the balance wheel.
  • the several parts are or locked individually by independent devices, barrel and transport safety devices for example.
  • the end part can be so slender that the timing accuracy ofthe balance wheel is not impaired by friction, and moreover, the pin can no longer bend, thereby impeding the movement of the central wheel of the fuse, nor can the end, carrying the balance wheel of the pin become deflected and the regu- 5 -lator become disturbed;
  • Fig. 1 is a longitudinal axial section throug a clockwork fuse, only such parts of the impact ignition device and pinion gear being shown as are necessary for understanding the invention.
  • Fig. 2 shows the fieldsafety device coacting 15 with the ignition portion of the striking pin
  • Fig. 3 represents the striking pin.
  • the ignition device 0 is in the casing a, b of the fuse.
  • the typical embodiment shown is a mechanical (clockwork) time fuse also highly sensitive to impact.
  • the igniter 11 extends centrally, from the nose (not shown) as far as the detonator cap e.
  • the ignition pin (1 (see Fig. 3) is dividal into three parts, the first part d1v of which, the so-called impact member, rests at its lower part on the head of the second part, (12 the socalled transmission member, and is guided in a sleeve d'z, surrounding the latter.
  • the lower end-of the transmission member d2 is above, the so-called striker pin dz, which acts upon the detonator cap e.
  • the impact member di and transmission member (is are supported by the cheeks f, of the barrel-safety device, which engage the sleeve (1's, in known manner.
  • the barrel safety device operates to prevent ignition of the fuse while the projectile is in the barrel of the gun.
  • the striker pin (is in turn is seated, by means of its collar d'a, on the segment a of the field-safety device, gearing, by means of the tooth 171, with its control pinion h.
  • the bottom end of the transmission member dz, and the head end of the striker pin da are guided in an axial bore .of the shaft i of the center wheel.
  • the slender lower end d3 of the striker pin acts as 45 the shaft upon which is mounted the balance wheel I: provided with a bored hub l.
  • the ignition device for the timing mechanism is independent of that for the impact mechanism, m denoting the striking pin and n the detonator 0 cap of the said timing mechanism. The construction of this mechanism is immaterial to the invention.
  • the sub-divisionof the ignition pin (1 into several parts is also of considerable advantage from the point bf view of manufacture,
  • the impact ignition device functions in the following manner. After the rotary movement of the projectile has been started by flringtheshot, the two cheeks f of the barrel-safety device fly apart, under the action of centrifugal force, but only after the projectile has issued from the barrel. Until then, and during the propulsion of the projectile within the barrel the transmission member (12, by its inertia, forces its projection 12, into the recesses q of the cheeks f, as shown in Fig. 1 with such force as to maintain them in position despite the rotary movement. After separation of the checks 1, the impact and transmission members are now free, whereas, the ignition member (is is still restrained by the field safety segment 9.
  • a clockwork fuse for artillery projectiles comprising, precision clockwork including a balance wheel, an impact ignition pin, safety means so constructed and arranged as to normally engage saidimpact ignition pin but releasing it at the end of the acceleration of the projectile; a detonator ⁇ in alignment with said impact ignition pin, a striker pin of substantially smaller diameter than said impact ignition pin and disposed in alignment with the latter and between it and the detonator, said striker pin forming a ty means so arranged as to engage said striker pin at least until the end of said acceleration period, said impact and striker pins being arranged in the longitudinal axis of the fuse.
  • a clockwork fuse. for artillery projectiles comprising. precision clockwork including a balance wheel, ignition means including a detonator and a plurality of separate aligned pins arranged in the longitudinal axis of :the fuse, one of said pins being a relatively massive impact pin and 6 another of said pins being-a light and slender striker pin cooperating with .the detonator and forming a shaft for said balance wheel, and a separate and independently operative safety device engaging each of said impact and striker 35 pins of said ignition means.
  • a clockwork fuse accordingtc claim 2 in which a transmission pin is provided between the impact member and the striker pin.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Toys (AREA)
US217071A 1935-08-04 1938-07-01 Percussion igniting device for clockwork fuses Expired - Lifetime US2231581A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEJ52947D DE676701C (de) 1935-08-04 1935-08-04 Aufschlagzuendvorrichtung fuer Uhrwerkszuender
CH204893T 1938-05-05
FR837900T 1938-05-13
GB17159/38A GB502933A (en) 1935-08-04 1938-06-09 An improved combined clockwork and direct action percussion fuze

Publications (1)

Publication Number Publication Date
US2231581A true US2231581A (en) 1941-02-11

Family

ID=25982792

Family Applications (1)

Application Number Title Priority Date Filing Date
US217071A Expired - Lifetime US2231581A (en) 1935-08-04 1938-07-01 Percussion igniting device for clockwork fuses

Country Status (5)

Country Link
US (1) US2231581A (de)
CH (1) CH204893A (de)
DE (1) DE676701C (de)
FR (1) FR837900A (de)
GB (1) GB502933A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2531121A (en) * 1944-10-05 1950-11-21 Borg George W Corp Mechanical time fuse
US2537855A (en) * 1944-06-09 1951-01-09 Henry H Porter Point contact fuse
US2554586A (en) * 1943-09-11 1951-05-29 Robert D Miller Detent
US5612505A (en) * 1980-08-25 1997-03-18 The United States Of America As Represented By The Secretary Of The Navy Dual mode warhead

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2554586A (en) * 1943-09-11 1951-05-29 Robert D Miller Detent
US2537855A (en) * 1944-06-09 1951-01-09 Henry H Porter Point contact fuse
US2531121A (en) * 1944-10-05 1950-11-21 Borg George W Corp Mechanical time fuse
US5612505A (en) * 1980-08-25 1997-03-18 The United States Of America As Represented By The Secretary Of The Navy Dual mode warhead

Also Published As

Publication number Publication date
CH204893A (de) 1939-05-31
DE676701C (de) 1941-06-20
FR837900A (fr) 1939-02-22
GB502933A (en) 1939-03-28

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