A block and tackle is an apparatus that utilizes what simple machine?
"rope through the block. The snatch block is also the load lifting pulley in certain arrangements. Block and tackle A block and tackle is a system of two or more pulleys with a rope or cable threaded between them, usually used to lift heavy loads. The pulleys are assembled together to form blocks and then blocks are paired so that one is fixed and one moves with the load. The rope is threaded through the pulleys to provide mechanical advantage that amplifies the force applied to the rope. Hero of Alexandria described cranes formed from assemblies of pulleys in the"
"assembly of a rope and pulleys that is used to lift loads. A number of pulleys are assembled together to form the blocks, one that is fixed and one that moves with the load. The rope is threaded through the pulleys to provide mechanical advantage that amplifies that force applied to the rope. In order to determine the mechanical advantage of a block and tackle system consider the simple case of a gun tackle, which has a single mounted, or fixed, pulley and a single movable pulley. The rope is threaded around the fixed block and falls down to the"
"up. Due to the volume of the cavity between the two balls being so small, the operator is afforded the opportunity to evacuate this space efficiently thereby quickly establishing a safe working environment. Block and bleed manifold A Block and bleed manifold is a hydraulic manifold that combines one or more block/isolate valves, usually ball valves, and one or more bleed/vent valves, usually ball or needle valves, into one component for interface with other components (pressure measurement transmitters, gauges, switches, etc.) of a hydraulic (fluid) system. The purpose of the block and bleed manifold is to isolate or block the"
"of the blocks and threaded through the two sets of pulleys form a block and tackle. A block and tackle is assembled so one block is attached to fixed mounting point and the other is attached to the moving load. The ideal mechanical advantage of the block and tackle is equal to the number of parts of the rope that support the moving block. In the diagram on the right the ideal mechanical advantage of each of the block and tackle assemblies shown is as follows: A rope and pulley system—that is, a block and tackle—is characterised by the use"
"Block and bleed manifold A Block and bleed manifold is a hydraulic manifold that combines one or more block/isolate valves, usually ball valves, and one or more bleed/vent valves, usually ball or needle valves, into one component for interface with other components (pressure measurement transmitters, gauges, switches, etc.) of a hydraulic (fluid) system. The purpose of the block and bleed manifold is to isolate or block the flow of fluid in the system so the fluid from upstream of the manifold does not reach other components of the system that are downstream. Then they bleed off or vent the remaining"
"block and tackle linking a low point on the mast (or an equivalent point on the hull) and the boom close to the mast, which allows the boom to be let out when reaching or running without lifting. This controls the twist of the mainsail from its foot to its head, increasing the sail's power and the boat's speed and controlability. Elvstrøm did not advertise his new invention, leaving his competitors mystified at his superior boat-speed. Investigation of his dinghy revealed nothing as he used to remove the kicking strap before coming ashore. He established a manufacturing company whose products"
"Stop block A stop block is a simple reusable jig used in metalworking and woodworking to locate a common edge of a workpiece so that multiple workpieces can get the same operation performed quickly. Common applications are table saws and manual milling machines, but they are also used on miter saws, band saws, radial arm saws, and abrasive saws. Stop blocks used in metalworking usually have a small rod that slides parallel to the vise jaws and can be tightened in a particular position. Stop blocks in woodworking are typically nothing more than wood blocks clamped to a rip fence"
"wheel and axle as one of the simple machines used to lift weights. This is thought to have been in the form of the windlass which consists of a crank or pulley connected to a cylindrical barrel that provides mechanical advantage to wind up a rope and lift a load such as a bucket from the well. The simple machine called a ""wheel and axle"" refers to the assembly formed by two disks, or cylinders, of different diameters mounted so they rotate together around the same axis.The thin rod which needs to be turned is called the axle and the"
"by the anvil. In other words, the staple gun substitutes the workpiece's inertia for the missing anvil. Staple gun A staple gun or powered stapler is a hand-held machine used to drive heavy metal staples into wood, plastic, or masonry. Staple guns are used for many different applications and to affix a variety of materials, including insulation, house wrap, roofing, wiring, carpeting, upholstery, and hobby and craft materials. These devices are also known as a ""trigger tacker"" There are generally three different types of staple guns distinguished by the power source used to operate the gun: manual, electric (From a"
"Block plane A block plane is a small woodworking hand plane which typically has the blade bedded at a lower angle than other planes, with the bevel up. It is designed to cut end grain and is typically small enough to be used with one hand. According to Patrick's Stanley Blood and Gore, Stanley marketing materials describe the origin of the name of this tool as follows: ""A Block Plane was first made to meet the demand for a Plane which could be easily held in one hand while planing across the grain, particularly the ends of boards, etc. This"
"or auxiliary fence so that a distance from the saw blade can be maintained between cuts. Stop block A stop block is a simple reusable jig used in metalworking and woodworking to locate a common edge of a workpiece so that multiple workpieces can get the same operation performed quickly. Common applications are table saws and manual milling machines, but they are also used on miter saws, band saws, radial arm saws, and abrasive saws. Stop blocks used in metalworking usually have a small rod that slides parallel to the vise jaws and can be tightened in a particular position."
"Punch-down block A punch-down block (also punchdown block, punch block, punchblock, quick-connect block and other variations) is a type of electrical connection often used in telephony. It is named because the solid copper wires are ""punched down"" into short open-ended slots which are a type of insulation-displacement connector. These slots, usually cut crosswise (not lengthwise) across an insulating plastic bar, contain two sharp metal blades which cut through the wire's insulation as it is punched down. These blades hold the wire in position and make the electrical contact with the wire as well. A tool called a punch down tool"
"that the third bearing is needed to ""locate"" the spindle, act as a thrust bearing, and support the heavy pulley. The multimachine uses a unique way of clamping the engine blocks together that is easily built, easily adjusted, and very accurate. The multimachine makes use of a concrete and steel construction technique that was heavily used in industry during the First World War and resurrected for this project. Multimachine The multimachine is an all-purpose open source machine tool that can be built inexpensively by a semi-skilled mechanic with common hand tools, from discarded car and truck parts, using only commonly"
"Jam block A jam block is a percussion instrument which is a modern, hard plastic version of the wood block. It is sometimes referred to as a ""clave block"", ""gok block"", or ""tempo block"". Jam blocks are popularly used for their sturdiness and durability compared to the traditional wood block, as well as in cowbell-like roles. Jam blocks are usually attached to timbales and drum kits, but can also be used as standalone orchestral instruments. These blocks are often used in salsa and other Latin American styles, although some modern drummers have made use of them in rock songs. Jam"
"the livestock. List of agricultural machinery Shear grab A shear grab or also known as a ""silo grab"" or ""block cutter"", is an implement used to cut blocks of silage from a silage pit/clamp. It is connected to a tractor via the three-point linkage or some are connected to a front end loader. It is powered by the tractors hydraulic system. It usually has spikes on the bottom and a large rectangular section with blades on it that cut the block using two hydraulic rams. Before the invention of shear grabs farmers had to use silage knives, and a link"
"Blocker (ice hockey) The goalie blocker is a rectangular piece of equipment worn by ice and roller hockey goaltenders. It is generally worn on the dominant hand. The blocker is a close-fitting glove augmented on the back of the hand, wrist and part of the forearm by a rectangular ""block"" of padding and fabric (leather or synthetic). Goaltenders hold their stick in that hand and use the padded rectangle to block shots -- bouncing them away from the net, as opposed to holding them in the catching glove. Experienced goalies can ""steer"" the shot by angling the blocker as the"
"Staple gun A staple gun or powered stapler is a hand-held machine used to drive heavy metal staples into wood, plastic, or masonry. Staple guns are used for many different applications and to affix a variety of materials, including insulation, house wrap, roofing, wiring, carpeting, upholstery, and hobby and craft materials. These devices are also known as a ""trigger tacker"" There are generally three different types of staple guns distinguished by the power source used to operate the gun: manual, electric (From a cord or battery), and pneumatic (Compressed air). Power staple guns can set staples at a somewhat quicker"
"a small block, often smaller than the lens itself. Some block cameras are completely self-contained, while others only contain the sensor block and its pre-amps, thus requiring connection to a separate camera control unit in order to operate. All the functions of the camera can be controlled from a distance, and often there is a facility for controlling the lens focus and zoom as well. These cameras are mounted on pan and tilt heads, and may be placed in a stationary position, such as atop a pole or tower, in a corner of a broadcast booth, or behind a basketball"
"Mechanical advantage device A simple machine that exhibits mechanical advantage is called a mechanical advantage device - e.g.: Consider lifting a weight with rope and pulleys. A rope looped through a pulley attached to a fixed spot, e.g. a barn roof rafter, and attached to the weight is called a ""single pulley"". It has a mechanical advantage (MA) = 1 (assuming frictionless bearings in the pulley), moving no mechanical advantage (or disadvantage) however advantageous the change in direction may be. A ""single movable pulley"" has an MA of 2 (assuming frictionless bearings in the pulley). Consider a pulley attached to"
"Breakout clone A Breakout"" clone (also known as a Breakout""-style game, block-breaking game, brick buster, or brick smash, birck break, brick destoyer/destruction, or ball-and-paddle game) is a sub-class of the ""bat-and-ball"" genre. The genre is named for the dynamics of the player-controlled block, called a ""bat"" or a ""paddle"", upon which the game is based, which hits a ball towards another player's bat or different objects such as colored tiles (called a ""brick""). The term ""brick buster"", coined in the early 2000s, mostly refers to more modern games. ""Breakout""-style games are characterized by the addition of a wall of blocks"
"the invention of the valved cornet. Modern instruments classified as bugles are often valved. Bugle The bugle is one of the simplest brass instruments, having no valves or other pitch-altering devices. All pitch control is done by varying the player's embouchure. Consequently, the bugle is limited to notes within the harmonic series. See bugle call for scores to standard bugle calls, all consisting of only five notes. These notes are known as the bugle scale. The bugle developed from early musical or communication instruments made of animal horns, with the word ""bugle"" itself coming from ""buculus"", Latin for bullock (castrated"
"handle known as a tote. ""Block planes"" are characterized by the absence of a chipbreaker and the cutting iron bedded with the bevel up. The block plane is a smaller tool that can be held with one hand which excels at working against the grain on a cut end of a board. It is also good for general purpose work such as taking down a knot in the wood, smoothing small pieces, and chamfering edges. Different types of bench planes are designed to perform different tasks, with the name and size of the plane being defined by the use. Bailey"
"Breechblock A breechblock (or breech block) is the part of the firearm action that closes the breech of a weapon (whether small arms or artillery) at the moment of firing. A way of closing the breech or chamber is an essential part of any breech-loading weapon or firearm. Perhaps the simplest way of achieving this is a break-action, in which the barrel, forestock and breech pivot on a hinge that joins the front assembly to the rear of the firearm, incorporating the rear of the breech, the butt and usually, the trigger mechanism. A breechblock is a separate component and"
"Wood block A wood block (also spelled as a single word, woodblock) is a small slit drum made from a single piece of wood and used as a percussion instrument. The term generally signifies the Western orchestral instrument, though it is related to the ""ban"" time-beaters used by the Han Chinese, which is why the Western instrument is sometimes referred to as Chinese woodblock. Alternative names sometimes used in ragtime and jazz are clog box and tap box. In orchestral music scores, wood blocks may be indicated by the French ""bloc de bois"" or ""tambour de bois"", German ""Holzblock"" or"
"a conveyor belt at the top of the screen. It constantly rolls toward the playing area, delivering a steady supply of blocks. The player controls a small device which sits at the interface between the conveyor belt and the playing area, which can be moved left and right to catch the blocks and deposit them either in the playing area (which can hold 25 blocks in a 5X5 arrangement) or push them back up the conveyor belt. The device can hold up to five blocks. An uncaught block is considered a ""drop"". A flashing block can be used as a"
"Box and Blocks Test The Box and Blocks Test (BBT) is a functional test used in upper limb rehabilitation. The test is used to measure the gross manual dexterity of a patient, or of a person using an upper limb prosthetic device. The test consists of a box with a partition in the middle. Blocks are placed at one side of the partition. The box is placed at a table. The test subject is seated, facing towards the box. During the tests the test subject is given 60 seconds to move as many blocks as possible from one side to"
"Simple machine A simple machine is a mechanical device that changes the direction or magnitude of a force. In general, they can be defined as the simplest mechanisms that use mechanical advantage (also called leverage) to multiply force. Usually the term refers to the six classical simple machines which were defined by Renaissance scientists: A simple machine uses a single applied force to do work against a single load force. Ignoring friction losses, the work done on the load is equal to the work done by the applied force. The machine can increase the amount of the output force, at"
"Scrum machine A scrum machine, or scrummaging machine, is a padded, weighty device against which a pack of rugby football forwards can practice scrummaging and rucking. The purpose of the scrum machine is to provide teams with a safe tool with which to improve the strength and skills of their players. The ideal engagement of a pack into a scrum is a simultaneous movement in the hit, shunt and drive. It is the instantaneous force exerted that makes the difference, not the sum of all the forces over time. Even small packs that coordinate in this fashion and hit 'on"
"in 1808. The machines were of 22 types and totalled 45. They were driven by two 30 hp (22.4 kW) steam engines. The machines included circular saws, pin turning machines and morticing machines. With these machines 10 men could produce as many blocks as 110 skilled craftsmen. A pulley-block has four parts: the shell, the sheave, the pin for locating the latter in the shell and a metal bush, or coak, inserted into the sheave to save wear between it and the pin. Blocks can vary in size and in the number of sheaves. The process of making the shells"
"and allows a smith to form metal to various angles and shapes, most notably as spoons, ladles and funnels. Swage block A swage block (or swager block) is a large, heavy block of cast iron or steel used in smithing, with variously-sized holes in its face and usually with forms on the sides. The through-holes are of various shapes and sizes and are used to hold, support or back up a hot bar of metal for further shaping. Operations performed on a swage block include but are not limited to bending, cutting, punching and forming. The sides are scalloped to"
"force applied at ""A"" the end of the rope, and let ""F"" be the force at ""B"" on the moving block. Like the velocities ""F"" is directed downwards and ""F"" is directed upwards. For an ideal block and tackle system there is no friction in the pulleys and no deflection or wear in the rope, which means the power input by the applied force ""F""""V"" must equal the power out acting on the load ""F""""V"", that is The ratio of the output force to the input force is the mechanical advantage of an ideal gun tackle system, This analysis generalizes"
"a red-hot steel punch, capable of being raised or lowered at will, and under which the block is moved about by hand along the lines of the pattern. In addition to the engraved block, a printing table and colour sieve are required. The table consists of a stout framework of wood or iron supporting a thick slab of stone varying in size according to the width of cloth to be printed. Over the stone table top a thick piece of woolen printers blanket is tightly stretched to supply the elasticity necessary to give the block every chance of making a"
"Wheel and axle The wheel and axle are one of six simple machines identified by Renaissance scientists drawing from Greek texts on technology. The wheel and axle consists of a wheel attached to a smaller axle so that these two parts rotate together in which a force is transferred from one to the other. A hinge or bearing supports the axle, allowing rotation. It can amplify force; a small force applied to the periphery of the large wheel can move a larger load attached to the axle. The wheel and axle can be viewed as a version of the lever,"