US2544358A - Fuse - Google Patents

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Publication number
US2544358A
US2544358A US66647A US6664748A US2544358A US 2544358 A US2544358 A US 2544358A US 66647 A US66647 A US 66647A US 6664748 A US6664748 A US 6664748A US 2544358 A US2544358 A US 2544358A
Authority
US
United States
Prior art keywords
cap
fuze
spring
screwed
passage
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
US66647A
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English (en)
Inventor
Schermuly Alfred James
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
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Publication of US2544358A publication Critical patent/US2544358A/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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • F42C15/21—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin using spring action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C7/00—Fuzes actuated by application of a predetermined mechanical force, e.g. tension, torsion, pressure
    • F42C7/12—Percussion fuzes of the double-action type, i.e. fuzes cocked and fired in a single movement, e.g. by pulling an incorporated percussion pin or hammer

Definitions

  • This invention relates to fuzes for the ignition of pyrotechnic devices, such as flares and the like, which are dropped from aircraft and has for its object to provide a fuze which is not actuated until after the device has left the aircraft.
  • the usual method of igniting fiares to be dropped from aircraft is by means of a friction or percussion igniter connected to a delay fuze within the flare casing, the igniter being actuated prior to dropping the flare. It has been found in practice that it is possible for the flare to become ignited before leaving the aircraft with consequent danger of fire in the aircraft.
  • a fuze for pyrotechnic devices to be dropped from aircraft comprises a cruciform member having a hollow body and two aligned hollow arms, the passage through said hollow arms intersecting the passage through the body, a sliding member in said hollow body, a screw cap adapted to hold the said sliding member in a position to obstruct the passage through said arms, in opposition to a spring, a firing pin within one of said hollow arms, a spring loaded detonator in the other of said hollow arms, and vanes on said cap which during the fall of the device unscrew the cap to release the sliding member and thereby allow unobstructed movement of the detonator onto the firing
  • Figure 1 is an exploded view of a fuze according to this invention.
  • Figure 2 is a section through the fuze in safe position, the vanes on the cap having been omitted, and
  • Figure 3 is a similar section through the fuze after it has been fired.
  • a cruciform member consisting of a tubular body I and tubular arms 2, 3 is provided with an external screwthread 4 by means of which it may be screwedinto the nose of the casing of a pyrotechnic device, such as a flare, external screw-threads 5 and 6 onto which knurled caps I and 8 may be screwed, and a screwthread 9 onto which a cuplike member I may be screwed.
  • a cruciform member consisting of a tubular body I and tubular arms 2, 3 is provided with an external screwthread 4 by means of which it may be screwedinto the nose of the casing of a pyrotechnic device, such as a flare, external screw-threads 5 and 6 onto which knurled caps I and 8 may be screwed, and a screwthread 9 onto which a cuplike member I may be screwed.
  • the passage II through the body I has a widened portion I2.
  • the body I is adapted to contain a sliding member I3 comprising a stem I 4 which is a sliding fit in the passage II and a flange I which is a sliding fit in the widened 5 Claims. (Cl. 102-86) portion I2.
  • a spring I6 is arranged around the stem M.
  • the cup-lik member ID is provided with an internal screwthread I'I adapted to engage the screwthread 9 on the "body I.
  • the base of the cup-like member ID is provided with a screwed hole I8.
  • the cap I9 having vanes 20, is provided with a central peg 2
  • the knurled cap I is provided with a firing pin 22, and the knurled cap 8 is adapted to retain a detonator 23 and a spring 24 within the arm 3.
  • a safety pin 25 and a spring clip 26 are also provided.
  • the procedure for assembling the fuze is as follows:
  • the sliding member I3 and spring I6 are inserted in the body I and the cup-like member ID screwed on.
  • the cap I9 is then screwed on, whereby the peg ZI forces the sliding member I3 into the position shown in Figure 2.
  • the safety pin 25 may be passed through holes in the cap 20, the cup-like member ID and the peg 2I, and held in position by means of the spring clip 26. This holds these parts against unintentional rotation.
  • the screwthreads 9 and I8 should be in opposite directions, one right-hand and the other left-hand.
  • the detonator 23 and spring 24 are then inserted inside the arm 3 and the knurled cap 8 is screwed on. The detonator 23 is thus held firmly pressed by the spring 24 against the stem I4.
  • the knurled cap I is then screwed on, and the fuze screwed by means of the screwthread 4 into the nose of the casing of a pyrotechnic device, such as a fiare.
  • the safety pin 25 is removed and the device dropped from the aircraft.
  • ] rotate the cap I9, thereby unscrewing it from the screwed hole I8, whereupon the cap I9 falls away and the spring I6 is then able to urge the sliding member I3 into the position shown in Figure 3.
  • the spring 24 then forces the detonator 23 into engagement with the firing pin 22 and the flash from the detonator passes through the passage I I to ignite either the device or a delay fuze connected to the device.
  • a fuze for pyrotechnic devices to be dropped from aircraft comprising a cruciform member having a hollow body and two aligned hollow arms, the passage through said hollow arms intersecting the passage through the body, a sliding member in said hollow body, a cap having a central peg which is adapted to hold the said sliding member in a position to obstruct the passage through said arms in opposition to a spring, a cup-like member having a threaded hole in its base, said cup-like member being screwed on to said hollow body and said peg being screwed into the hole in the cup-like member, a firing pin within one of said hollow arms, a spring loaded detonator in the other of said hollow arms, and vanes on said cap which during the fall of the device unscrew said peg from the cup-like member to release the sliding member and thereby allow unobstructed movement of the detonator on to the firing pin. 7 a
  • a fuze as claimed in claim 2 in which a spring is coiled around said stem.
  • a fuze as claimed in claim 3 there being apertures adapted to receive a safety pin in the body and the cap to prevent premature rotation of the cap.
  • a fuze as claimed in claim 4 in combination with a second cap adapted to be screwed on to one of said arms, the firing pin being mounted in said second threaded cap.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
US66647A 1948-01-02 1948-12-22 Fuse Expired - Lifetime US2544358A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2544358X 1948-01-02

Publications (1)

Publication Number Publication Date
US2544358A true US2544358A (en) 1951-03-06

Family

ID=10909671

Family Applications (1)

Application Number Title Priority Date Filing Date
US66647A Expired - Lifetime US2544358A (en) 1948-01-02 1948-12-22 Fuse

Country Status (2)

Country Link
US (1) US2544358A (de)
FR (1) FR978304A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611942A (en) * 1968-02-27 1971-10-12 Israel Defence Detonating mechanism for a bomb fuse
US6631667B1 (en) 2000-10-25 2003-10-14 Lockheed Martin Corporation Explosive-bolt-activated spring-loaded actuation device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1683940A (en) * 1924-07-17 1928-09-11 Wiley Samuel Illuminating aero bomb or flare
FR684952A (fr) * 1929-02-19 1930-07-03 Bombe aérienne à temps
GB582574A (en) * 1944-02-07 1946-11-21 Albert Henry Midgley Improvements in fuzes for aerial bombs and like missiles
US2427371A (en) * 1945-01-16 1947-09-16 Short Frank Fuse for land mines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1683940A (en) * 1924-07-17 1928-09-11 Wiley Samuel Illuminating aero bomb or flare
FR684952A (fr) * 1929-02-19 1930-07-03 Bombe aérienne à temps
GB582574A (en) * 1944-02-07 1946-11-21 Albert Henry Midgley Improvements in fuzes for aerial bombs and like missiles
US2427371A (en) * 1945-01-16 1947-09-16 Short Frank Fuse for land mines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3611942A (en) * 1968-02-27 1971-10-12 Israel Defence Detonating mechanism for a bomb fuse
US6631667B1 (en) 2000-10-25 2003-10-14 Lockheed Martin Corporation Explosive-bolt-activated spring-loaded actuation device

Also Published As

Publication number Publication date
FR978304A (de) 1951-04-12

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