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Hammerless

Hammerless is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Hammerless rather than just read about it. In short: A hammerless firearm is a firearm that lacks an exposed hammer or hammer spur. Although it may not literally lack a hammer, it lacks an external hammer that the user can manipulate directly.

Hammerless — main illustration
Hammerless — illustration

Key takeaways

  • Hammerless belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Hammerless to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Hammerless from memory before moving on to harder problems.

Reference excerpt

A hammerless firearm is a firearm that lacks an exposed hammer or hammer spur. Although it may not literally lack a hammer, it lacks an external hammer that the user can manipulate directly. One of the disadvantages of an exposed hammer spur is the tendency for it to get caught on items such as clothing; covering (shrouding or bobbing) the hammer by removing the hammer spur reduces this from occurring.

Early hammerless firearms

Early caplock firearms, patterned after their flintlock ancestors, had exposed hammers. The conversion was done by replacing the flash pan with a nipple for a percussion cap, and the flintlock's cock with a hammer to crush the metallic cap and ignite the powder. The hammer was on the side of the firearm, which is easily reached for priming and cocking. The earliest cartridge firearms simply copied the older style of action; the Springfield Model 1873 "Trapdoor" rifle and most early cartridge double-barreled shotguns and double-barreled rifles are good examples of this. In these designs, the loading of the cartridge(s) and the cocking of the hammer(s) were separate operations. While rifles evolved quickly away from these early breech loading designs, the double-barrelled shotgun and the double rifle retained its popularity, and for some time, its exposed hammers. First produced by British gunmaker George Daw 1862, but his model was not a success. However it inspired other models by a number of makers using trigger-plate designs by Green (1868), Murcott (1871) Gibbs and Pitt (1873), and F.B. Woodward in (1876). The first American inventor was Daniel Myron LeFever in 1878. It used internal strikers that were cocked manually, but in 1883, he developed a version that cocked the strikers automatically as the action was closed. This type of hammerless action, or the similar cock-on-open variation, is nearly universal in the majority of modern American double-barrel shotguns.

Hammerless technology A hammerless weapon is a modification of the original firing mechanism of firearms. Hammerless firearms do not feature an exposed firing hammer or firing “spur”. This feature is easily identifiable in the rear of the weapon's stock and requires the operator to manually “cock” it to arm the weapon. Rifles with an exposed firing hammer were frequently subjected to accidental discharges due to the exposed firing pin. With a hammerless weapon an internal firing pin reduced the risk of accidental discharge to the operator, because of the safety features of the internal firing pin. The rifle and shotgun subsequently became capable of having a more rapid firing rate as well, because the operator no longer had to manually “cock” the exposed firing hammer(s) on the weapon prior to each time the weapon was discharged. The exposed firing hammer was also frequently caught on clothing and interfered with the operator's ability to aim accurately. The introduction of hammerless firearm technology in rifles and shotgun and later on, handguns greatly improved their safety, firing rate, and accuracy. The Savage Arms Company pioneered the use of hammerless technology in repeating rifles during the late nineteenth century, and this feature has carried on to the majority of firearms today. Compared to pistols and handguns of the nineteenth century, which had exposed firing hammers, weapons such as the Glock series have enclosed firing mechanisms that do not use an actual hammer. The firing pin is put under spring tension during cocking and the trigger simply releases the pin. Hammerless technology has increased the safety of firearms by reducing the risk of injury to the operator and by increasing the technological capabilities of a firearm's mechanical features.

Hammerless firearms

Shotguns

Early pump-action shotguns, like the lever-action rifles that preceded them, had exposed hammers. The most famous of these is probably the Winchester Model 1897. Like the double-barrelled shotguns, soon, the early pump-action shotguns were replaced by models that enclosed the hammer completely in the action. Modern pump-action shotguns, with the exception of replicas of older exposed-hammer designs required in Cowboy action shooting, are all hammerless.

Handguns

While shotguns have gone almost entirely hammerless (inexpensive single-shot models being the main exception), handguns are available in significant numbers in many different forms, with or without exposed hammers. Striker-fired guns, which are becoming more common, have no hammer, but they have a striker that is used as a firing pin instead, while many guns that do have hammers, such as revolvers, they are available with the hammer shrouded or with the hammer spur bobbed off. To be able to shroud or bob the hammer of a revolver or semi-automatic pistol, it must be of either a double-action or double-action only design.

Rifles

… excerpt ends here. Continue reading the full article.

Illustrations

Hammerless: Example of a hammerless revolver, the Smith & Wesson Safety Hammerless
Example of a hammerless revolver, the Smith & Wesson Safety Hammerless
Hammerless: Smith & Wesson Safety Hammerless advertisement from 1899, as published in Harper's Magazine
Smith & Wesson Safety Hammerless advertisement from 1899, as published in Harper's Magazine
Hammerless: A page of the 1976 Smith & Wesson catalog, detailing the Models 36, 37, 38, 48, and 49. A hammerless Smith & Wesson revolver is located in the middle
A page of the 1976 Smith & Wesson catalog, detailing the Models 36, 37, 38, 48, and 49. A hammerless Smith & Wesson revolver is located in the middle
Hammerless: Lefever Arms Company hammerless shotgun
Lefever Arms Company hammerless shotgun
Hammerless: Ithaca 37 shotgun
Ithaca 37 shotgun

Worked examples

Example 1 — a first encounter with Hammerless

Start with the simplest possible case. Write down what Hammerless claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Hammerless before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Hammerless ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Hammerless

In research
Hammerless appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Hammerless in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Hammerless is common in secondary-school and first-year university syllabi. It links to neighbouring topics Firearm actions, Savage Arms, so understanding it makes those chapters shorter.
In everyday life
Look for Hammerless outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Hammerless in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Hammerless means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Hammerless out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hammerless in simple terms?

A hammerless firearm is a firearm that lacks an exposed hammer or hammer spur. Although it may not literally lack a hammer, it lacks an external hammer that the user can manipulate directly.

Why does Hammerless matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Hammerless?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Hammerless.

Tags

  • Firearm actions
  • Savage Arms

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