teach ict input and output devices games

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Ngày tải lên: 26/07/2014, 17:20

... 3 In another type of action, the forward and return strokes are accomplished by a suitable mechanism, while the raising and lowering is imparted by a friction slide. Thus it can be seen that as ... the raising and lowering of the transport is accomplished by a cam. The shafts, F, E, and D are positioned by the frame of the machine. Special bell cranks support the transport and are interconnected ... breaks while the machine is running, the unsupported idler carrier falls to the base of the standard, and when the standard arrives at the sta- tion in the raceway adjacent to the cam C, the lug L on the...

Ngày tải lên: 22/10/2012, 14:26

... near standstill. In the disengaged position, the angu- lar velocity ratio between the output and input shafts (the “gear” ratio) is entirely dependent upon the design angles α and β and independent ... drive, the two rollers drive the output shaft and lock it during dwell periods. For each revolution of the input shaft, the output shaft has two motion periods. The output displacement ϕ is determined ... cam, the input shaft would drive the output gear by the worm gear at constant speed. The worm and the bar- rel cam, however, can slide linearly on the input shaft. The rota- tion of the input shaft...

Ngày tải lên: 22/10/2012, 14:26

... The input then drives the output with the bevel gears. Rotating the adjusting shaft in a plane at right angles to the input- output line changes the relative radial position of the input and output ... 138 134 TWELVE EXPANDING AND CONTRACTING DEVICES Parallel bars, telescoping slides, and other devices that can spark answers to many design problems. Fig. 1 Figs. 1 and 2 Expanding grilles are ... continuous rotary input motion into an output that oscillates the shaft back and forth. Sclater Chapter 5 5/3/01 11:47 AM Page 170 inputs, and z is the output. The motion of x and y in the same...

Ngày tải lên: 22/10/2012, 14:26

... ARRANGEMENTS Differential, duplex, and other types of screws can provide slow and fast feeds, minute adjustments, and strong clamping action. Rapid and slow feed. With left- and right-hand threads, slide motion ... frictionless, stictionless and neg- ligible hysteresis characteristics. The bearing is radiation-resistant and can be used in high vacuum conditions or in environments where there is dirt and contamination. 185 TAUT ... between vibrating machinery and the surrounding struc- ture? These isolators, like capable fight- ers, absorb the light jabs and stand firm against the forces that inflict powerful haymakers 190 SPRING-TYPE...

Ngày tải lên: 22/10/2012, 14:26

... magnetic signal amplification. A rotating input avoids a lin- ear input and output of the simple windlass. Control and output ends of the mul- titurn bands are both connected to gears mounted ... motor, the maximum output speed will be 1200 = 3984 rpm, and the minimum output speed = 3984/11 = 362 rpm. Double-reduction system (Fig. 3). Solid sheaves are on both the input and output shafts, ... of neoprene or polyurethane, and trapezoidal tooth profiles. Fig. 2 NASA metal timing belts exploit stainless steel’s strength and flexibility, and are coated with sound -and friction-reducing plastic. Sclater...

Ngày tải lên: 22/10/2012, 14:26

... motor com- parable in size and power to those used in standard reel-to-reel recorders, and a large bi-peripheral flywheel and sturdy capstan that reduces wow and flutter and drives the tape. A patent ... gears f and d mounted on output shaft b. Spur gear c meshes with idler e and with spur gear d. Idler e meshes with spur gears c and f. The output shaft b carries two free-wheel disks g and h, ... spherical disks and rollers. This also reduces operating stresses and wear. The input shaft runs through the unit and carries two oppos- ing spherical disks. The disks drive the double-sided output disk...

Ngày tải lên: 22/10/2012, 14:26

... clutch, on the other hand, is a three-member unit with rotating input and output members and a stationary coil housing. It eliminates the need for brushes and slip rings, but it demands additional ... Page 317 336 LINKAGES FOR BAND CLUTCHES AND BRAKES Fig. 1 An outside band clutch operated by a roller and cone. Fig. 2 An outside band clutch made as two half wrap bands with an interme- diate ... faster. Edges of the clutch bands carry the entire load, and there is also a compound action of one band upon another. As the torque builds up, each band pushes down on the band beneath it, so each...

Ngày tải lên: 22/10/2012, 14:26

... difference between the coefficient of friction at the start and the coefficient of sliding friction. Sliding friction will be affected by moisture, foreign matter, and wear of the surfaces. Capacity ... electric machinery and protect it and its operator. Actuators Linear mechanical switches Sclater Chapter 10 5/3/01 1:08 PM Page 356 CHAPTER 10 TORQUE-LIMITING, TENSIONING, AND GOVERNING DEVICES Sclater ... radially, the input- output ration changes. By properly arrang- ing the rings and springs, the gear ration can be controlled by the movement of the balls to maintain a constant value of output speed. Sclater...

Ngày tải lên: 22/10/2012, 14:26

... POWER Cartridge-actuated devices generate a punch that cuts cable and pipe, shears bolts for fast release, and provides emergency thrust. Sclater Chapter 11 5/3/01 1:17 PM Page 402 Fig. 1 Automatic weighing and ... simplicity, and cost. Fig. 1 A bimetallic sensor is simple, compact, and precise. Contacts mounted on low-expansion struts determine slow make- and- break action. A shell contracts or expands with ... single-gland type. Automatic wear control compensates for normal wear and maintains volumetric efficiency. This pump will handle 5 to 300 gph without churning or foaming. It needs no lubrication and...

Ngày tải lên: 22/10/2012, 14:26

... ψ 13 and ψ 12 . This establishes points A′ 2 , A′ 3 and A′ 4 , but here A′ 3 and A′ 4 coincide because of symmetry of A 3 and A 4 about A 0 B 0 . 4. Draw lines A 1 A′ 2 and A 1 A′ 4 , and the ... is the output and it replaces the center gear in Fig. 1. Fig. 7 A more practical ring-gear and slider arrangement. The output is now from the smaller gear. Fig. 8 Jensen’s model of the ring-gear and ... on a conveyor is tilted 90º by an output crank, which is actuated by an input crank through a coupler. Other mechanisms shown can also coordinate the input and output angles; some have dwell periods...

Ngày tải lên: 22/10/2012, 14:26

... than 5 ms/step. An input of two simple input pulse signals will operate it. This motor can index gears in MEMS such as locking devices, counters, and odometers. It was built with Sandia’s four-layer ... capability and verifying commercial demand. Initially ADI built these devices by interleaving, com- bining, and customizing its internal manufacturing processes to produce the micromechanical devices ... organic and freeform shapes. Consequently, commercial software producers offer 3D hybrid surface and solid-modeling suites that integrate 2D drafting and 3D wireframe with 3D surface and 3D solid...

Ngày tải lên: 22/10/2012, 14:26

... Technologies Group, Radford, VA ã Ledex Actuation Products, TRW Control Systems, Vandalia OH ã Sandia National Laboratories, Sandia Corporation, Albuquerque, NM ã SolidWorks Corporation, Concord, MA ã ... Data Sclater, Neil. Mechanisms and mechanical devices sourcebook / Neil Sclater, Nicholas P. Chironis.— 3rd ed. p. cm. Rev. ed of: Mechanisms & mechanical devices sourcebook / [edited by] ... applications beyond NASA’s immediate objectives in space science and requirements for specialized equip- ment. The names of the scientist/inventors and the NASA facilities where the work was performed have...

Ngày tải lên: 22/10/2012, 14:26

... left-handed threads, ã An eye on a shank with external right- handed threads, and ã A flanged collar with left-handed external threads to mate with the shank of the first- mentioned eye, and right-handed ... and unloading operations. Sclater Chapter 12 5/3/01 1:25 PM Page 411 414 FRICTION CLAMPING DEVICES Many different devices for gaining mechanical advantage have been used in the design of friction ... is pushed upward an additional 15º, locking the handle cam and the slide. In step 6, the handle is rotated an additional 30º, forcing the box and the mating spring-loaded electrical con- nectors...

Ngày tải lên: 22/10/2012, 14:26

... angular-momentum-balanced, robot 48 ball -and- cone 250 ball -and- disk, and 251 ball -and- screw 5 12 bearings and roller 117 belt 12 224 257 belt -and- chain, variable speed 224 cam for ... 326 friction 326 particle -and- fluid 327 magnetostrictive 327 mechanical basic 302 small, for precise service 322 mercury-gland 303 Index Terms Links Mechanisms cont. pin -and- disk, ... duplex, single- and double-coil 327 driving 321 eddy current 326 electrostatic 327 expanding-shoe 303 expanding shoe, centrifugal 303 fixed-field 326 free-wheeling 317 friction general...

Ngày tải lên: 22/10/2012, 14:27

... first and second editions, (published in 1991 and 1996, respectively), that has been supplemented by new and revised articles reflecting present and future trends in mechanical engineering and ... Mechanisms & Mechanical Devices Sourcebook, a well illus- trated reference book containing a wide range of information on both classical and mod- ern mechanisms and mechanical devices. This edition ... illustra- tions and descriptions of basic mechanisms and mechanical devices, accompanied by useful applications information. This material has been culled from a wide range of books and magazines...

Ngày tải lên: 22/10/2012, 14:27