US3611943A - Bombs fuses coupled axial impeller and generator rotor jointly shiftable rearwardly during launching to prevent rotation thereof - Google Patents

Bombs fuses coupled axial impeller and generator rotor jointly shiftable rearwardly during launching to prevent rotation thereof Download PDF

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Publication number
US3611943A
US3611943A US802112A US3611943DA US3611943A US 3611943 A US3611943 A US 3611943A US 802112 A US802112 A US 802112A US 3611943D A US3611943D A US 3611943DA US 3611943 A US3611943 A US 3611943A
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US
United States
Prior art keywords
impeller
casing
body portion
ball bearing
fuse
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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
US802112A
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English (en)
Inventor
Jakhin Boaz Popper
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Defence Israel
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Defence Israel
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Publication date
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Publication of US3611943A publication Critical patent/US3611943A/en
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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
    • F42C15/28—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids
    • F42C15/295—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges operated by flow of fluent material, e.g. shot, fluids operated by a turbine or a propeller; Mounting means therefor

Definitions

  • This invention relates to bomb fuses and in particular to bomb fuses of the kind including an impeller or turbine which is adapted to rotate upon release or launching of the bomb as a result of the flow of air through the impeller blades, arming of the bomb being completed when the impeller has rotated by a predetermined number of turns and/or a predetermined minimum speed of rotation of impeller has been attained.
  • bomb fuse refers to any form of projectile containing a high explosive charge adapted to be launched or propelled by a mortar or other thrower or to be released by an aircraft.
  • the impeller can be suitably coupled to the detonator mechanism so that, at the required instant, after a predetermined number of turns of the impeller, the motion of the latter is effective in moving the detonator mechanism into an armed position.
  • the impeller can be coupled to an electromagnetic generator the current output of which supplies an electronic signalling mechanism so that arming of the bomb can be effected when the turbine has attained the minimum speed required to generate sufficient current.
  • a bomb fuse of the kind specified comprising a fuse casing, aniinpeller located within the fuse casing, a rotor of an electromagnetic generator located within the fuse casing and coupled to the impeller, outer walls of the fuse casing in which are formed air inlet holes by means of which air can flow through thefuse casing so as to rotate the impeller, an internal body portion of said fuse casing, at least one ball bearing displaceably mounted with respect to said body portion, said impeller being supported by said ball bearing, spring-biasing means adapted to bear at one end on said body portion and at .the other end on said ball hearing so as to bias said impeller away from said body portion, the arrangement being such that said -impeller and said ball bearing are displaceable under the influence of launching accelerations and against the said spring biasing so as to bear directly on said body portion.
  • the disposing of the impeller within the fuse casing is distinctly advantageous as in this way the fuse retains its advantageous aerodynamic shape.
  • FIGS. 1 and 2-of the accompanying drawings are longitudinal sections of the bomb fuse showing its disposition respectively before and during the launching.
  • the bomb fuse comprises a casing having a conical nose portion 1 and a substantially cylindrical body portion 2 a screw-threaded portion 3 being formed at an intennediate position on the body portion 2 so as to enable the fuse to be screwed into the body of the bomb (not shown).
  • An impeller4 is mounted within the casing on an axle 5.
  • the impeller 4 is rigidly and centrally coupled to the rotor 6 of an electromagnetic generator the coupling being such that a slight airgap 7 is maintained between the impeller 4 and the rotor 6 thereby allowing automatic dynamic balancing of the impeller 4 upon rotation.
  • the impeller axle is formed with a shoulder 8 which bears on a first ball bearing 9 the outer component of which is fitted within a central bore 10 formed in the internal body portion 11 of the casing.
  • An elongated extension 12 of the impeller axle 5 extends through a spacer sleeve l3 and then through a second ball bearing 14 also slidably mounted in the bore 10, this second ball bearing 14 resting on a nut 15 secured to the extension 12.
  • the extension 12 of the impeller axle extends into the body of the fuse for purposes which will be referred to below.
  • a compression spring 16 is located in the central bore surrounding the spacing sleeve 13 the upper end of the spring 16 bearing onthe upper ball bearing 9 whilst the lower end of the spring 16 bears against a retaining ring 17 set into the walls of the bore 10.
  • Inclined air inlet apertures 18 are fonned in the conical walls of the casing 1 above the impeller whilst air outlet apertures 19 are formed in the walls of the cylindrical portion 2 of the casing below the impeller 4.
  • the impeller axle extension which projects into the body portion of the fuse can be coupled to a suitable detonating mechanism so that upon a predetermined rotation of the impeller disc the detonating mechanism is moved into an arming position.
  • a suitable mode of coupling the impeller with the detonating mechanism is described in our copending Patent Application No.
  • a bomb fuse comprising a fuse casing, said fuse casing including a leading end portion of substantially frustoconical form, an intermediate different portion of frustoconical form constituting a smooth continuation of the leading end portion, said intermediate portion being immediately behind said leading portion, and a trailing portion of substantially cylindrical form behind said intermediate portion, means defining a plurality of peripherally disposed air inlet holes in said intermediate portion, means defining a plurality of peripherally disposed air outlet holes in said trailing portion, means defining a passageway within said casing from said inlet holes to said outlet holes, an electromagnetic generator located within said casing, said generator including a stator fixedly mounted with respect to said casing and a rotor which is rotatable and axially displaceable with respect to said stator, an internal body portion of the fuse casing, at least one ball bearing, means mounting said ball bearing displaceably with respect to said internal body portion, an impeller, means coupling said impeller to said generator rotor, said impeller being supported by said ball bearing and being
  • a bomb fuse according to claim 1 which further includes means defining an axial bore within said body portion, an axle secured to said impeller and extending axially into said axial bore, a second ball bearing, said ball bearings being secure in

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US802112A 1968-02-27 1969-02-25 Bombs fuses coupled axial impeller and generator rotor jointly shiftable rearwardly during launching to prevent rotation thereof Expired - Lifetime US3611943A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IL29535A IL29535A (en) 1968-02-27 1968-02-27 A delay fuse including a turbine

Publications (1)

Publication Number Publication Date
US3611943A true US3611943A (en) 1971-10-12

Family

ID=11044372

Family Applications (1)

Application Number Title Priority Date Filing Date
US802112A Expired - Lifetime US3611943A (en) 1968-02-27 1969-02-25 Bombs fuses coupled axial impeller and generator rotor jointly shiftable rearwardly during launching to prevent rotation thereof

Country Status (6)

Country Link
US (1) US3611943A (de)
DE (1) DE1908519A1 (de)
FR (1) FR2002728A1 (de)
IL (1) IL29535A (de)
NL (1) NL6903095A (de)
SE (1) SE357256B (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814019A (en) * 1972-07-26 1974-06-04 Us Army Expansile protective cap for fluidic ordnance fuzes
US3973501A (en) * 1973-01-11 1976-08-10 The United States Of America As Represented By The Secretary Of The Navy Fuze with dual safe positions and armed-safe indicator
US4004519A (en) * 1976-04-12 1977-01-25 The United States Of America As Represented By The Secretary Of The Navy Projectile power generator
US20040020395A1 (en) * 2002-05-17 2004-02-05 Jorg Kutzli Percussion fuse (ignition device)
US6845714B1 (en) * 2003-06-16 2005-01-25 The United States Of America As Represented By The Secretary Of The Army On-board power generation system for a guided projectile
US20080237391A1 (en) * 2006-08-10 2008-10-02 Hr Textron, Inc. Guided projectile with power and control mechanism
US20080302906A1 (en) * 2006-12-05 2008-12-11 Diehl Bgt Defence Gmbh & Co. Kg Spin-Stabilized Correctible-Trajectory Artillery Shell
US20080308671A1 (en) * 2007-06-12 2008-12-18 Hr Textron, Inc. Techniques for articulating a nose member of a guidable projectile
US20080315032A1 (en) * 2007-06-21 2008-12-25 Hr Textron, Inc. Techniques for providing surface control to a guidable projectile
US20100147992A1 (en) * 2007-01-10 2010-06-17 Hr Textron Inc. Eccentric drive control actuation system
US12038262B1 (en) * 2021-09-27 2024-07-16 Dixi Microtechniques Mechanical self-percussion fuze for a non-gyrating ammunition

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO140690C (no) * 1977-11-02 1979-10-17 Kongsberg Vapenfab As Anordning ved ramluftturbiner.
DE3214714A1 (de) * 1982-04-21 1983-10-27 Gebrüder Junghans GmbH, 7230 Schramberg Sicherungseinrichtung fuer ein drallfreies geschoss
DE3834556A1 (de) * 1988-10-11 1990-04-12 Diehl Gmbh & Co Entsicherungseinrichtung mit drehfluegel
DE102015012977B4 (de) 2015-10-07 2018-01-04 Junghans Microtec Gmbh Windrad, Antrieb und Zünder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409205A (en) * 1932-03-02 1946-10-15 Raymond L Graumann Bomb fuse
US2415804A (en) * 1943-05-10 1947-02-18 Philip W Allison Fuse for antiaircraft shells
US2644398A (en) * 1947-12-17 1953-07-07 Us Army Constant torque clutch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2409205A (en) * 1932-03-02 1946-10-15 Raymond L Graumann Bomb fuse
US2415804A (en) * 1943-05-10 1947-02-18 Philip W Allison Fuse for antiaircraft shells
US2644398A (en) * 1947-12-17 1953-07-07 Us Army Constant torque clutch

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3814019A (en) * 1972-07-26 1974-06-04 Us Army Expansile protective cap for fluidic ordnance fuzes
US3973501A (en) * 1973-01-11 1976-08-10 The United States Of America As Represented By The Secretary Of The Navy Fuze with dual safe positions and armed-safe indicator
US4004519A (en) * 1976-04-12 1977-01-25 The United States Of America As Represented By The Secretary Of The Navy Projectile power generator
US20040020395A1 (en) * 2002-05-17 2004-02-05 Jorg Kutzli Percussion fuse (ignition device)
US6779457B2 (en) * 2002-05-17 2004-08-24 Ruag Munition Percussion fuse (ignition device)
US6845714B1 (en) * 2003-06-16 2005-01-25 The United States Of America As Represented By The Secretary Of The Army On-board power generation system for a guided projectile
US20050016408A1 (en) * 2003-06-16 2005-01-27 Smith Brian J. On-board power generation system for a guided projectile
US7431237B1 (en) * 2006-08-10 2008-10-07 Hr Textron, Inc. Guided projectile with power and control mechanism
US20080237391A1 (en) * 2006-08-10 2008-10-02 Hr Textron, Inc. Guided projectile with power and control mechanism
US20080302906A1 (en) * 2006-12-05 2008-12-11 Diehl Bgt Defence Gmbh & Co. Kg Spin-Stabilized Correctible-Trajectory Artillery Shell
US7584922B2 (en) * 2006-12-05 2009-09-08 Diehl Bgt Defence Gmbh & Co. Kg Spin-stabilized correctible-trajectory artillery shell
US20100147992A1 (en) * 2007-01-10 2010-06-17 Hr Textron Inc. Eccentric drive control actuation system
US7755012B2 (en) 2007-01-10 2010-07-13 Hr Textron, Inc. Eccentric drive control actuation system
US20080308671A1 (en) * 2007-06-12 2008-12-18 Hr Textron, Inc. Techniques for articulating a nose member of a guidable projectile
US7696459B2 (en) * 2007-06-12 2010-04-13 Hr Textron, Inc. Techniques for articulating a nose member of a guidable projectile
US20080315032A1 (en) * 2007-06-21 2008-12-25 Hr Textron, Inc. Techniques for providing surface control to a guidable projectile
US7791007B2 (en) 2007-06-21 2010-09-07 Woodward Hrt, Inc. Techniques for providing surface control to a guidable projectile
US12038262B1 (en) * 2021-09-27 2024-07-16 Dixi Microtechniques Mechanical self-percussion fuze for a non-gyrating ammunition

Also Published As

Publication number Publication date
FR2002728A1 (de) 1969-10-31
NL6903095A (de) 1969-08-29
SE357256B (de) 1973-06-18
DE1908519A1 (de) 1969-10-30
IL29535A (en) 1973-06-29

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