GB487544A - Electric fuze for submarine mines, grenades, bombs and like ammunition - Google Patents
Electric fuze for submarine mines, grenades, bombs and like ammunitionInfo
- Publication number
- GB487544A GB487544A GB15443/37A GB1544337A GB487544A GB 487544 A GB487544 A GB 487544A GB 15443/37 A GB15443/37 A GB 15443/37A GB 1544337 A GB1544337 A GB 1544337A GB 487544 A GB487544 A GB 487544A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- shaft
- pinion
- pawl
- meshes
- 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
Links
- 238000013016 damping Methods 0.000 abstract 2
- 238000005192 partition Methods 0.000 abstract 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 abstract 1
- 230000006698 induction Effects 0.000 abstract 1
- 239000011810 insulating material Substances 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 239000011435 rock Substances 0.000 abstract 1
- 238000004804 winding Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C11/00—Electric fuzes
- F42C11/04—Electric fuzes with current induction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q2/00—Lighters containing fuel, e.g. for cigarettes
- F23Q2/28—Lighters characterised by electrical ignition of the fuel
- F23Q2/285—Lighters characterised by electrical ignition of the fuel with spark ignition
- F23Q2/287—Lighters characterised by electrical ignition of the fuel with spark ignition piezoelectric
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
487,544. Fuzes for projectiles and submarine mines; magnetos. SOC. ANON. FAX. June 3, 1937, Nos. 15443 and 15444. Convention dates, June 3, 1936 and Dec. 3, 1936. [Classes 9 (i) and 9 (ii)] [Also in Group XXXV] Relates to an electric fuze for submarine mines, grenades, bombs, and like ammunition projectiles, in which the current for the spark is supplied by a current generator driven by a spring motor provided with means for winding it and fitted with the generator in the mine or projectile. According to the invention, a ratchet holding mechanism for the spring motor is released on impact of the projectile or on the mine and a circuitbreaking device in the spark circuit is controlled by the rotor of the current generator in such manner that it closes as the rotor is set in motion. As shown in Fig. 1, a casing 1 is divided by a partition 2 into two chambers, the upper one of which contains the motor spring 3, one end of which is secured to the casing 1 whilst the other end is attached to a bush 4 loosely mounted on a shaft 5 and provided on its lower end with ratchet teeth meshing with similar teeth on a ring 6 secured on the shaft 5. This shaft passes through the partition 2 into the lower chamber where it carries a coil 10 forming the rotor of the current generator, the stator of which is formed by the U-shaped polepieces 11, 12 of a permanent magnet 9. A pinion 13 on the lower end of shaft 5 meshes with a toothed wheel 14 which carries on its lower face a contact disc provided with a sector of insulating material, one of the terminals 17 for the feed current being arranged to wipe over this disc. One end of the coil 10 is connected to the contact disc whilst its other end is connected to the second feed terminal 19. In its inoperative position, the terminal 17 contacts with the insulating sector and the igniting circuit is open, but as soon as the spring motor 3 is released, rotation of the contact disc brings the conducting portion thereof into contact with terminal 17 and the igniting circuit is closed. If desired, a centrifugal breaking device, the centrifugal masses of which close a circuit when they reach a determined path of oscillation, may be employed. An induction coil may be inserted between the terminals 17, 19 and the spark-gap. The spring 3, which is wound by means of a key fitting on the polygonal end 20 of the shaft 5, is maintained wound by a pawl 8 which engages a ratchet wheel 7 mounted outside the casing 1 at the upper end of the shaft 5. Engagement between the pawl 8 and ratchet wheel 7 so as to release the spring 3 and actuate the current generator may be annulled by means of any suitable device on impact of the projectile or upon the mine. When it is desired to produce ignition only a certain time after impact, the fuze is provided with a delay device as shown in Fig. 3. In this arrangement, the motor spring is mounted in a box 21 having a toothed rim 22 which meshes with the pinion 23 of a winding-up device on a shaft 24 carrying a handle 25. A pawl 26 prevents backward rotation of the pinion 23 and of the box 21 to which the outer end of the spring 3 is secured. The other end of the spring is attached to a shaft 27 carrying a ratchet wheel 28 engaging a pawl 29 carried by an arm 30 pivoted at 31 and carrying at its free end an inertia mass 32 which is held in its inoperative position by a pin 33. After removal of the pin 33 and on impact, the inertia of the mass 32 rocks the arm 30, the pawl 29 is released and the spring is allowed to unwind. The mechanism cannot, however, attain at once the speed required for ignition on account of the provision of the relay device comprising a screw 34 on which a bush 35 fixed to the cover of the casing 1 is screwed. A pinion 36 of a substantial depth on the screw 34 meshes with a toothed wheel 37 mounted on the shaft 27 whilst a toothed wheel 38 also carried by the screw 34 meshes with a pinion 39 controlling a damping wing (not shown). As the spring motor begins to unwind, screw 34 is set in rotation by the gears 37, 36 and is screwed up into the bush 35 carrying with it the pinion 36, the rotational movement being braked by the damping wing as long as pinion 36 is in engagement with the toothed wheel 37. The duration of the ignition delay can be adjusted by varying the initial position of pinion 36 by means of a milled button 40 on the indicator dial 41. If desired, the stator may be in the form of a coil and the armature in the form of a permanent magnet.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT487544X | 1936-06-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB487544A true GB487544A (en) | 1938-06-22 |
Family
ID=11268398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15443/37A Expired GB487544A (en) | 1936-06-03 | 1937-06-03 | Electric fuze for submarine mines, grenades, bombs and like ammunition |
Country Status (5)
Country | Link |
---|---|
US (1) | US2192542A (en) |
BE (1) | BE426372A (en) |
DE (1) | DE706927C (en) |
FR (1) | FR822973A (en) |
GB (1) | GB487544A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2434551A (en) * | 1943-08-11 | 1948-01-13 | Eliomarkakis Panayottis John | Magnetic fuse |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2935950A (en) * | 1944-05-13 | 1960-05-10 | William B Mclean | Release mechanism |
US2525817A (en) * | 1945-05-31 | 1950-10-17 | Macadams Jesse Edward | Generator |
US2563494A (en) * | 1948-11-18 | 1951-08-07 | Contacting device for controlling the igniting circuit of a main spring driven dynamoelectrical igniting device | |
US2870841A (en) * | 1952-07-25 | 1959-01-27 | Baker Oil Tools Inc | Apparatus for operating subsurface well devices |
GB869665A (en) * | 1957-04-04 | 1961-06-07 | Wasagchemie Ag | Apparatus for firing explosive charges |
US3844215A (en) * | 1960-04-13 | 1974-10-29 | Us Army | Mine fuze |
CH373985A (en) * | 1961-11-30 | 1963-12-15 | Rochat Jean | Electric ignition device for projectile |
US3342998A (en) * | 1965-04-01 | 1967-09-19 | Fidelity Electric Company Inc | Spring-driven electrical generator |
US11692798B2 (en) * | 2021-12-07 | 2023-07-04 | Southwest Research Institute | Electrical igniter assembly for incendiary and explosive devices |
-
1937
- 1937-02-20 DE DES126091D patent/DE706927C/en not_active Expired
- 1937-06-03 US US146305A patent/US2192542A/en not_active Expired - Lifetime
- 1937-06-03 GB GB15443/37A patent/GB487544A/en not_active Expired
- 1937-06-11 FR FR822973D patent/FR822973A/en not_active Expired
-
1938
- 1938-02-15 BE BE426372D patent/BE426372A/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2434551A (en) * | 1943-08-11 | 1948-01-13 | Eliomarkakis Panayottis John | Magnetic fuse |
Also Published As
Publication number | Publication date |
---|---|
DE706927C (en) | 1941-06-09 |
US2192542A (en) | 1940-03-05 |
FR822973A (en) | 1938-01-11 |
BE426372A (en) | 1938-03-31 |
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