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- Interrupted_screw abstract "An interrupted screw or interrupted thread is a mechanical device typically used in the breech of artillery guns. It was invented circa 1845.It is a screw that has a section of thread along its axis removed. The screw is mated with a hole at the rear of the weapon's chamber; i.e., where the screw has threads the hole does not, and vice versa. The screw can thus be smoothly inserted all the way into the gun, after which as little as 1⁄6 of a turn can engage the two sets of threads securely, sealing the breech. Interrupted screws are occasionally seen in loose gunpowder rifles, as this mechanism was historically one of the few practical ways to achieve a gas-proof seal with a breech-loading firearm that does not employ cartridges. An earlier method was the use of a wedge to block the rear of the gun.Sealing was further improved with the de Bange obturator in 1872.The major weakness of the original designs was that only half of the circumference of the breechblock could be threaded, hence a fairly long breechblock was still required to achieve a secure lock. Axel Welin solved this problem with his stepped interrupted screw design : the Welin breech block of 1890. This design has threads of the block and breech cut in steps of successively larger radius. This allows e.g. a breechblock with 4 steps to allow 4/5 of the block circumference to be threaded, allowing for a much shorter breechblock while still only requiring 1/5 turn to open or close. This is the basic design still in use with bagged charge artillery.".
- Interrupted_screw thumbnail Breech_122m10_hameenlinna_2.jpg?width=300.
- Interrupted_screw wikiPageExternalLink breech.htm.
- Interrupted_screw wikiPageExternalLink Gun_Data.htm.
- Interrupted_screw wikiPageID "2360300".
- Interrupted_screw wikiPageRevisionID "557902954".
- Interrupted_screw hasPhotoCollection Interrupted_screw.
- Interrupted_screw subject Category:Firearm_components.
- Interrupted_screw subject Category:Screws.
- Interrupted_screw type CausalAgent100007347.
- Interrupted_screw type Defender109614684.
- Interrupted_screw type Keeper110229498.
- Interrupted_screw type Lawman110249459.
- Interrupted_screw type LivingThing100004258.
- Interrupted_screw type Object100002684.
- Interrupted_screw type Organism100004475.
- Interrupted_screw type Person100007846.
- Interrupted_screw type PhysicalEntity100001930.
- Interrupted_screw type Preserver110466918.
- Interrupted_screw type PrisonGuard110149867.
- Interrupted_screw type Screws.
- Interrupted_screw type Whole100003553.
- Interrupted_screw type YagoLegalActor.
- Interrupted_screw type YagoLegalActorGeo.
- Interrupted_screw comment "An interrupted screw or interrupted thread is a mechanical device typically used in the breech of artillery guns. It was invented circa 1845.It is a screw that has a section of thread along its axis removed. The screw is mated with a hole at the rear of the weapon's chamber; i.e., where the screw has threads the hole does not, and vice versa.".
- Interrupted_screw label "Filetage interrompu".
- Interrupted_screw label "Interrupted screw".
- Interrupted_screw label "Schraubenverschluss".
- Interrupted_screw label "隔螺式".
- Interrupted_screw sameAs Schraubenverschluss.
- Interrupted_screw sameAs Filetage_interrompu.
- Interrupted_screw sameAs 隔螺式.
- Interrupted_screw sameAs m.076dr5.
- Interrupted_screw sameAs Q1542304.
- Interrupted_screw sameAs Q1542304.
- Interrupted_screw sameAs Interrupted_screw.
- Interrupted_screw wasDerivedFrom Interrupted_screw?oldid=557902954.
- Interrupted_screw depiction Breech_122m10_hameenlinna_2.jpg.
- Interrupted_screw isPrimaryTopicOf Interrupted_screw.
