Who invented the m3 grease gun

The M3 takes thirty-round magazines patterned after the Sten's magazines and are known to jam quite frequently, although this is mainly due to faulty followers as opposed to the actual gun's design; the magazines used by the M3 were the main source of many soldiers' complaints about the weapon throughout its service life. One of the most notable things about the M3 was its charging handle, which was a pivoting crank located on the right of the receiver.

When the crank was operated, a pawl engages a notch which pulls the bolt back. The bolt is then pulled back until it locks onto the sear. The handle consists of nine parts and adds a decent amount of weight to the weapon. The later M3A1 was a highly simplified version of the M3, with some notable design changes, such as a magazine loading tool welded to the stock, the spare lubricant clip removed and replaced by an oil reservoir inside the pistol grip and most notably, the ejection port lengthened and the charging mechanism altered entirely.

Instead of using a crank, the M3A1 did not have an external charging handle; instead, there was a recess in the bolt which its user can insert a finger inside and pull the bolt back.

The M3A1 was a good 0. The M3 normally took. These kits included a new barrel, bolt, recoil springs, a magazine well adapter and a round Sten magazine.

The sights of the M3 were not altered for this conversion however and it was discovered that the M3 shot high when converted although this was later deemed of little importance to fix. These kits required the crank mechanism and trigger guard on the M3 removed before the barrel could be unscrewed and replaced.

These kits were also made for the M3A1, although the barrel could simply be unscrewed and replaced, with no other parts needing to be removed. Various M3s were converted to M3A1 standard over time by simply removing the crank that acted as a charging handle and not removing the rest of the action inside the weapon , although faults with the magazine and reports of unintentional discharge still occurred regardless.

The round magazines were retained and were a continued source of complaints. Caps were provided to shield loaded magazines' feed lips; [15] initially, these were made of hard Tenite plastic and designated the T2, although these were later replaced with rubber caps which could be removed with less noise than the Tenite caps.

During the Vietnam War it was discovered that these rubber caps could cause rust to form on the covered portions of the magazine and lead to corroding ammunition. Various problems with the PAM1, such as overheating while firing due to the weapon's thinner sheet steel receiver , uncontrollability while firing fully automatically due to the higher fire rate , led to an improved version known as the PAM2 designed in Production ended in with 47, produced.

Very close copy of the M3A1 manufactured by the Mukden Arsenal in Resembles the M3A1 but lacks the oil reservoir in the pistol grip and the two cuts in the barrel to allow for easy removal using the stock.

These conversion kits included a new 9mm bored barrel, a new replacement bolt and new recoil springs. Additionally a magazine well adapter for use with British Sten gun round magazines, and a replacement 9mm Sten magazine of British manufacture were also included. As the M3's sights were not altered for the new cartridge, the 9mm M3 shot high at yards, however the sighting error was deemed insignificant, and without consequence.

The OSS also ordered approximately 1, Specially drilled barrels and barrel nuts were manufactured by Guide Lamp, while the High Standard Firearms Company produced the internal components required and were responsible for final assembly0. American infantryman firing at North Korean troops during the Korean War. With its stamped, riveted, and welded construction, the M3 was originally designed as a minimum-cost small arm, to be used and discarded once it became inoperative.

As such, replacement parts, weapon-specific tools, and sub-assemblies were not made available to unit-, depot-, or ordnance-level commands at the time of the M3's introduction to service. In , a lack of M3 submachine guns created by the need for interim production changes forced the hand of U.

Army Ordnance workshops to fabricate pawl springs and other parts to keep existing weapons functional. The M3 and M3A1 were mostly phased out from active U. During the mid s tank drivers of the 1st Battalion 67th Armored attached to the 2nd Armored Division were issued the M3A1, due of its size and portability.

The M3 was an automatic submachine gun, operated by an air-cooled blowback-operated system that fired from an open bolt. Manufactured from basic.

The M3 was striker-fired, with a fixed firing pin contained inside the bolt. The bolt was drilled longitudinally in order to support two parallel guide rods, upon which were mounted twin return recoil springs. This configuration allowed for larger machining tolerances while providing operating clearance in the event of dust, sand, or mud ingress.

The M3 featured a spring-loaded extractor which was housed inside the bolt head, while the ejector was located in the trigger group. Like the British Sten, time and expense was saved by cold-swaging the M3's barrel. The M3 operating sequence is as follows: the bolt is cocked to the rear using the cocking handle located on the right side of the ejector housing.

When the trigger is pulled, the bolt is driven forward by the recoil springs, stripping a round from the feed lips of the magazine and guiding the round into the chamber. The bolt then continues forward and the firing pin strikes the cartridge primer, igniting the round, resulting in a high-pressure impulse, forcing the bolt back against the resistance of the recoil springs and the inertial mass of the bolt.

By the time the bolt and empty casing have moved far enough to the rear to open the chamber, the bullet has left the barrel and pressure in the barrel has dropped to a safe level. The M3's comparatively low cyclic rate was a function of the relatively low pressure generated by the.

The gun used metal stamping and pressing, spot welding and seam welding extensively in its construction, reducing the number of man-hours required to assemble a unit.

Only the barrel, bolt and firing mechanism were precision machined. The receiver consisted of two sheet metal halves welded together to form a cylinder. At the front end was a knurled metal cap which was used to retain the removable barrel. The cold-swaged, rifled barrel had 4 right-hand grooves.

M3 and M3A1 submachine guns could be fitted with an optional, detachable flash hider, though none saw any service in World War II. During World War II, there was almost a desperate urgency to manufacture vast quantities of weapons as quickly and cheaply as possible — particularly submachine guns.

In the 21st century, we are used to weapons made from exotic materials and possessing high-technology features that maximize killing power. Back then, the materials used for these hastily produced SMGs looked like they were purchased on sale at the corner hardware store. The British did it by producing the Sten Gun , a 9 x mm submachine gun made of steel tubing and sheet metal that bears a similarity to a piece of plumbing.

The United States was no different when it came to producing a quick-and-dirty alternative to the Thompson. Made of stamped metal parts like a General Motors car — not surprising when you remember it was produced by the same division that made metal automobile headlights — the M3 is not a submachine gun noted for its fine tolerances and sleek design. It has no adjustable sights, no selector switch, no fine-grained wood furniture, and few milled-steel components. Yet, that simplicity allowed the manufacture and distribution of more than , M3s during World War II alone.

Besides, it saved the government money.