US2138234A - Projectile fuse - Google Patents

Projectile fuse Download PDF

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Publication number
US2138234A
US2138234A US207085A US20708538A US2138234A US 2138234 A US2138234 A US 2138234A US 207085 A US207085 A US 207085A US 20708538 A US20708538 A US 20708538A US 2138234 A US2138234 A US 2138234A
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US
United States
Prior art keywords
bolt
safety bolt
safety
control member
rotation
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
US207085A
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English (en)
Inventor
Henry Pierre
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.)
Mefina SA
Original Assignee
Mefina SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mefina SA filed Critical Mefina SA
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Publication of US2138234A publication Critical patent/US2138234A/en
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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
    • 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
    • F42C9/048—Unlocking of clockwork mechanisms, e.g. by inertia or centrifugal forces; Means for disconnecting the clockwork mechanism from the setting mechanism
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
    • B62H5/00—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles
    • B62H5/02—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles for locking the steering mechanism
    • B62H5/06—Appliances preventing or indicating unauthorised use or theft of cycles; Locks integral with cycles for locking the steering mechanism acting on the front wheel fork or steering head tube
    • 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
    • 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
    • F42C9/045—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 a spring

Definitions

  • This invention relates in general to improved 'safety mechanism for clockwork time fuses for projectiles and more particularly has reference to a. clockwork time fuse for projectiles to be set for a fraction of a revolution.
  • the hammer or firing pin of the fuse is tensioned by a spring and is held fast in this tensioned position by a centrifugally actuated bolt controlled by a time regulating member driven by the clockwork until at the end of a period corresponding to a previously adjusted setting, the time regulating member releases the bolt held against the centrifugal force acting thereon, so that the now freely movable hammer or firing pin is projected under the action of the spring against the detonator and effects the explosion of the projectile.
  • An object of the present invention is to devise a safety mechanism free from this defect and which provides for complete security, both during the setting operation and during the transportation of a projectile in the set condition.
  • Another object of this invention is to provide a fuse, the setting of which can be altered or put back at any time without danger independently of the previous set period, as only a running down of the time regulating member and a simultaneous minimum rotation of the projectile can effect the release of the hammer or firing pin.
  • a further object is to provide a construction in which the safety bolt on one side fixes the zero position of the setting and on the other side is itself locked in this zero position by the time regulating member against accidental release.
  • Still another object is to provide a safety mechanism so constructed that through its positive release it immediately allows the setting, but on the return of the time regulating member to the zero position it again automatically assumes the locked position when it is not subjected to centrifugal force exceeding a given amount, which secures it. in the releasedposition and so renders the release of the hammer or firing pin possible.
  • Figure 1 is an axial sectional View taken through the lower part of a time fuse according to the present invention.
  • Fig. 2 is a sectional and partial top View taken on the line lI-II of Fig. 1 and shows the safety members in the zero position.
  • Fig. 3 is a view similar to Fig. 2 showing the positions of the members at the maximum setting
  • Fig. 4 is another view similar to Fig. 2 showing the position of the members during the flight of the projectile immediately before the disengagement of the hammer locking bolt.
  • the fuse comprises a framework I mounted in a casing 2.
  • the lower end of the framework is provided with a sleeve 12, in which the hammer or firing pin in is slidably mounted.
  • a radial recess 26 is provided in which a second bolt 2'!v is slidably mounted and urged inwardly by a spring" 28.
  • This bolt 21 which is the safety bolt, is provided with a head 29 having an inner surface 39 inclined with respect to the radial central plane of. the bolt.
  • of the safety bolt. head opposite the surface 23 of the abutment H is shaped so that in the zero position (Fig. 2) these two surfaces harmonize, being placed obliquely against the direction of force, the parts having the position illustrated in Fig. 2.
  • the function of the safety bolt 27 is fourfold:
  • the safety bolt when not subjected to centrifugal force fixes the zero position of the setting, as it prevents the toothed crown l8 from a further clockwise rotation, which might result in the release of the hammer bolt l3 under the effect of an accidental lateral blow on the projectile. This, of course, would cause the immediate explosion of the projectile.
  • the safety bolt 21 will allow counterclockwise rotation of the toothed crown, as is necessary at setting, and will again return automatically under the action of spring 28 into the locking position shown in Fig. 2 upon the reversal of the rotation of the toothed crown.
  • the safety bolt 27 must, upon the rotation of the projectile during flight, move to a position under the action of centrifugal force thereon, as soon as this force is greater than the opposing force of the spring 28, at which position said safety bolt 2? will not check the desired release of the hammer or firing pin locking bolt i3.
  • any other member removable from the path af the time regulating member can also be employed, for example, an eccentrically mounted swinging bolt.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt adapted to be displaced by centrifugal force when the projectile is in flight, means urging said bolt to an inner position when not subjected to the centrifugal force of flight, and means on saidsafety bolt cooperating with the setting control member when the bolt is in its inner position for limiting rotary movement of said member in a given direction to determine the zero position of said member and for locking said bolt against accidental release, said means on the bolt permitting movement of the settin member in an opposite direction but acting in the'absence of centrifugal force on said bolt to again limit movement in said given direction beyond the zero setting, said bolt when subjected to centrifugal force being displaced to shift the means carried thereby out of cooperative engagement with said member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and cooperating means on said safety bolt and control member operable upon rotation of the control member in a direction opposite from that in which it is driven for displacing the safety bolt outwardly to permit such opposite rotation for setting the control member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt, means urging said safety bolt to a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and cooperating means on said safety bolt and control member operable upon rotation of the control member in a direction opposite from that in which it is driven for displacing the sefety bolt outwardly against said urging means to permit such opposite rotation for setting the control member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a radially movable safety bolt, means urging said safety bolt to a position to block rotation of the con trol member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and cooperating means on said safety bolt and control member operable upon rotation of the con trol member in a direction opposite from that in which it is driven for displacing the safety bolt outwardly against said urging means to permit such opposite rotation for setting the control member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and means for locking said safety bolt against outward movement when in blocking engagement with said control member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, cooperating means on said safety bolt and control member operable upon rotation of the control member in a direction opposite from that in which it is driven for displacing the safety bolt outwardly to permit such opposite rotation for setting the control member, and means for looking said safety bolt against outward movement when in blocking engagement with said control member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and means including a surface on said safety bolt oblique to the direction of movement of said safety boltand a surface on the control member oblique to the circumferential movement of said member adapted to cooperate with the oblique surface on the safety bolt to urge the bolt inwardly upon engagement of said oblique surfaces and the exertion of pressure on said bolt by the control member, whereby outward movement of said safety bolt is blocked.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and cooperating means on said safety bolt and control member operable upon rotation of the control member in a direction opposite from that in which it is driven for displacing the safety bolt outwardly to permit such opposite rotation for setting the control member, said control member having a toothed portion, a pinion meshing with said toothed portion, and an abutment carried by said toothed portion for limiting rotation thereof.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt normally in a position to block rotation of the control member in its driven direction beyond a given limit, said safety bolt being adapted to be moved outwardly by centrifugal force when the projectile is in flight to permit driven rotation of said control member beyond the given limit, and cooperating means on said safety bolt and control member operable upon rotation of the control member in a direction opposite from that in which it is driven for'displacing the safety bolt outwardly to permit such opposite rotation for setting the control member, said control memher having a toothed portion, a pinion meshing with said toothed portion, and an abutment formed on said toothed portion by the omission of a space between two adjacent teeth and adapted to cooperate with said pinion for limiting the rotation of said member.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, and a blocking cam surface formed on said rotary control member and inclined to engage and cooperate With the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, a blocking cam surface formed on said rotary control member and inclined to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork, a releasing cam surface formed on said safety bolt extending obliquely to the direction of movement thereof, and a releasing cam surface formed on said rotary control member and inclined to cooperate with the releasing cam surface of said safety bolt upon rotation of the control member in a direction opposite from that in which it is driven by the clockwork to displace the bolt out
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, and a split annular flange carried by said rotary member, one end face of said annular flange being inclined to form a blocking cam surface adapted to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork.
  • a safety mechanism for clockwork time fuses of projectiles comprising a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position.
  • a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, a split annular flange carried by said rotary member, one end face of said annular flange being inclined to form a blocking cam surface adapted to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork, a releasing cam surface formed on said safety bolt extending obliquely to the direction thereof, and a releasing cam surface formed on the other end of said annular flange and inclined to cooperate with the releasing cam surface of said safety bolt upon rotation of the control member in a direction opposite from that in which it is driven by the clockwork to displace the bolt outwardly.
  • a firing pin a centrifugally actuated bolt for looking and releasing the firing pin, a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, a split annular flange carried by said rotary member, one end face of said annular flange being inclined to form a blocking cam surface adapted to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork, and means on the locking bolt engaging said split flange for retaining said locking bolt in locked position until the split in the flange is reached.
  • a firing pin a centrifugally actuated bolt for looking and releasing said firing pin, a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, a split annular flange carried by said rotary member, one end face of said annular flange being inclined to form a blocking cam surface adapted to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork, a releasing cam surface formed on said safety bolt extending obliquely to the direction thereof, a releasing cam surface formed on the other end of "said annular f
  • a firing pin a centrifugally actuated bolt for locking and releasing said firing pin, a rotary clockwork driven time setting control member, a safety bolt mounted for movement outwardly by centrifugal force produced by rotation of the projectile in flight, means urging said safety bolt to an inner position when not subjected to centrifugal force, a blocking cam surface formed on said safety bolt and extending obliquely to the direction of movement of said safety bolt, a split annular flange carried by said rotary member, one end face of said annular flange being inclined to form a blocking cam surface adapted to engage and cooperate with the blocking cam surface of the safety bolt when said safety bolt is in its innermost position, to retain the safety bolt in its innermost position, and to block rotation of said member in the direction in which it is driven by the clockwork, a releasing cam surface formed on said safety bolt extending obliquely to the direction thereof, a releasing cam surface formed on the other end of said annular flange and

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Computer Security & Cryptography (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Emergency Lowering Means (AREA)
US207085A 1937-05-25 1938-05-10 Projectile fuse Expired - Lifetime US2138234A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH498780X 1937-05-25

Publications (1)

Publication Number Publication Date
US2138234A true US2138234A (en) 1938-11-29

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ID=4516833

Family Applications (1)

Application Number Title Priority Date Filing Date
US207085A Expired - Lifetime US2138234A (en) 1937-05-25 1938-05-10 Projectile fuse

Country Status (6)

Country Link
US (1) US2138234A (de)
BE (1) BE426510A (de)
CH (1) CH197622A (de)
FR (1) FR833503A (de)
GB (1) GB498780A (de)
NL (1) NL47205C (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748706A (en) * 1951-10-31 1956-06-05 Arthur P Field Mechanical fuse for grenades
US2911915A (en) * 1954-09-24 1959-11-10 Gibbs Mfg And Res Corp Time fuse
CN102735119A (zh) * 2012-06-29 2012-10-17 北京理工大学 一种引信用推动转盘转动的电推销器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2873678A (en) * 1955-02-25 1959-02-17 Magnavox Co Power generating device for projectiles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748706A (en) * 1951-10-31 1956-06-05 Arthur P Field Mechanical fuse for grenades
US2911915A (en) * 1954-09-24 1959-11-10 Gibbs Mfg And Res Corp Time fuse
CN102735119A (zh) * 2012-06-29 2012-10-17 北京理工大学 一种引信用推动转盘转动的电推销器

Also Published As

Publication number Publication date
GB498780A (en) 1939-01-13
NL47205C (de)
FR833503A (fr) 1938-10-24
BE426510A (de)
CH197622A (de) 1938-05-15

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