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A Schmidt hammer, [1] also known as a Swiss hammer or a rebound hammer or concrete hammer test, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance. It was invented by Ernst Heinrich Wilhelm Schmidt, a Swiss engineer. [2] The hammer measures the rebound of a spring ...
The Smith & Wesson Safety Hammerless or Smith & Wesson New Departure (nicknamed by collectors as the Lemon Squeezer) is a double-action revolver that was produced from 1887 to 1940 by Smith & Wesson. Based on the Smith & Wesson Model 2 double-action design, the revolver incorporated an internal hammer and an external grip safety on its back-strap.
Ball-peen hammer. A ball-peen or ball pein hammer, also known as a machinist's hammer, [1] is a type of peening hammer used in metalworking. It has two heads, one flat and the other, called the peen, rounded. It is distinguished from a cross-peen hammer, diagonal-peen hammer, point-peen hammer, or chisel-peen hammer by having a hemispherical peen.
The EMD Model 40 was a two-axle diesel-electric switcher locomotive built by Electro-Motive Corporation (EMC), and its corporate successor, General Motors ' Electro-Motive Division (EMD) between August 1940 and April 1943. Nicknamed "critters", eleven examples of this locomotive were built. Powered by twin General Motors Detroit Diesel 6-71 ...
Here is an S&W 4006 with a picatinny rail and bobbed hammer. This model previously served with the California Highway Patrol. The S&W 4006 features a stainless steel frame and slide, double action/single action handgun with 4-inch barrel, slide-mounted de-cock/safety and an 11-round staggered-column magazine. It was one of the new 3rd ...
The .40 S&W (10.2×22mm) is a rimless pistol cartridge developed jointly by American firearms manufacturers Smith & Wesson and Winchester in 1990. [3] The .40 S&W was developed as a law enforcement cartridge designed to duplicate performance of the Federal Bureau of Investigation's (FBI) reduced-velocity 10mm Auto cartridge which could be retrofitted into medium-frame (9 mm size) semi ...
The power hammer is a direct descendant of the trip hammer, differing in that the power hammer stores potential energy in an arrangement of mechanical linkages and springs, in compressed air, or steam, and by the fact that it accelerates the ram on the downward stroke. This provides more force than simply allowing the weight to fall.
MIL-S-901. Military Specification MIL-S-901D[1] is for high-impact mechanical shock which applies to equipment mounted on ships. Its publication date was Mar 17, 1989. Two levels apply: Grade A items are items which are essential to the safety and continued combat capability of the ship; Grade B items are items whose operation is not essential ...