laser light and radiofrequency devices

Mechanisms and Mechanical Devices Sourcebook - Chapter 3

Ngày tải lên : 22/10/2012, 14:26

... Cutoff and transfer devices for glass tubes The upper part of a rotating glass tube is held by a chuck (not shown) When the cutter cuts the tube to a given length, the mandrel comes down and a ... APPLICATIONS Viscous liquid adhesives are used to glue fabrics and paper, apply paper labels, make cardboard and wooden boxes and shoes, and bind books Specially designed machines are required if ... would bend and jam Avoid these designs, if possible—Especially if automatic assembly methods will be employed A rotary screw-feed handles screws, headed pings, shouldered shafts, and similar...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 4

Ngày tải lên : 22/10/2012, 14:26

... 4, and T3/T4 = L3/L4 = 2/3, where T3 and T4 are the numbers of teeth on gears and T1 and T2 will denote the numbers of teeth on gears and 98 and S = ∆θ 3/θ30 Hence θ30(1 + S)L3 = 360º For S = and ... = r4 and r2 = r3, there is no “differential motion” and the output remains stationary Thus if one gear pair, say and 4, is made partly circular and partly noncircular, then where r2 = r3 and r1 ... pulleys, and linkages (see drawing) instead of the usual genevas or cams is capable of cyclic start -and- stop motions with smooth acceleration and deceleration Developed by Eric S Buhayar and Eugene...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 5

Ngày tải lên : 22/10/2012, 14:26

... 11:45 AM Page 134 TWELVE EXPANDING AND CONTRACTING DEVICES Parallel bars, telescoping slides, and other devices that can spark answers to many design problems Figs and Expanding grilles are often ... Dynamic and static balancing is simplified when an expanding wheel is attached to a nonexpanding main wheel As a pulley, an expanding wheel can have a steel band fastened to only one section and ... steel band, or rope around the drum is fastened to the driving and driven members; sprocket-wheels and chain can replace the drum and belt GEARS Fig Matching gear-segments Fig 10 Racks and coupled...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 6

Ngày tải lên : 22/10/2012, 14:26

... Bearing adjustment This screw arrangement is a handy way for providing bearing adjustment and overload protection Rapid and slow feed With left- and right-hand threads, slide motion with the nut locked ... 0.4—A linear spring rate and high load resistance with small deflections For height to spring ratios between 0.8 and 1.0—An almost linear spring rate for fasteners and bearing and in stacks For rations ... you need a buffer between vibrating machinery and the surrounding structure? These isolators, like capable fighters, absorb the light jabs and stand firm against the forces that inflict powerful...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 7

Ngày tải lên : 22/10/2012, 14:26

... equations of motion Fig A standard differential winch consists of two drums, D1 and D , and a cable or chain which is anchored on both ends and wound clockwise around one drum and counterclockwise around ... and chains are expanding the horizons for light- duty synchronous drives Belts have long been used for the transfer of mechanical power Today’s familiar flat belts and V-belts are relatively light, ... ROLLER CHAINS AND THEIR ADAPTATIONS Various roller, side-plate and pin configurations for power transmissions, conveying, and elevating STANDARD ROLLER CHAIN—FOR POWER TRANSMISSION AND CONVEYING...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 8

Ngày tải lên : 22/10/2012, 14:26

... power losses in the gears and bearings and from windage and churning of lubricant gear power: A gear’s load and speed capacity, determined by gear dimensions and type Helical and helical-type gears ... motor comparable 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 ... VARIABLE-SPEED DRIVES AND TRANSMISSIONS These ratchet and inertial drives provide variable-speed driving of heavy and light loads Fig This variable-speed drive is suitable only for very light duty in...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 9

Ngày tải lên : 22/10/2012, 14:26

... bi-directional slip and independent torque capacities for the two directions of rotation It requires two springs, one right-handed and one left-handed, for coupling the input, intermediate and output ... 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 ... requirements of MIL-E-5400, class and MILK-3926 specifications Applications were seen in counter and reset switches and controls for machines and machine tools, radar systems, and precision potentiometers...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 10

Ngày tải lên : 22/10/2012, 14:26

... the switches were arranged in two stages: the first to trigger an amber warning light and second to light a red bulb and also sound an alarm bell Over-the-side or over-the-rear loading requires ... Chapter 10 5/3/01 1:07 PM Page 342 TORQUE-LIMITERS PROTECT LIGHT- DUTY DRIVES Light- duty drives break down when they are overloaded These eight devices disconnect them from dangerous torque surges Fig ... between the pin and the rotating finger must be shorter than the thread pitch so the pin can clear the finger on the first reverse-turn The rubber ring and grommet lessen the impact and provide a...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 11

Ngày tải lên : 22/10/2012, 14:26

... completely encased and cannot expand beyond its original diameter The standard pump is made of bronze and will handle volumes to 15 gpm The Squeegee develops a vacuum of 25 in of mercury and will work ... a diffusion pump; to evacute light bulbs and electronic tubes, and to vacuum dry and distill Single pumps draw vacuums from to microns; in series to 0.5 micron, and compound pumps draw to 0.1 ... single-gland type Automatic wear control compensates for normal wear and maintains volumetric efficiency This pump will handle to 300 gph without churning or foaming It needs no lubrication and operates...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 13

Ngày tải lên : 22/10/2012, 14:26

... opposite sense to ψ14, ψ13 and ψ12 This establishes points A′2, A′3 and A′4, but here A′3 and A′4 coincide because of symmetry of A3 and A4 about A0B0 Draw lines A1A′2 and A1A′4, and the perpendicular ... way For example, in Fig two angular motions, φ12 and φ13, must be synchronized with two others, ψ12 and ψ13, about the given pivot points A0 and B0 and the given crank length A0A This means that ... will coordinate angular motions φ12 and φ13 with ψ12 and ψ13 The procedure is: Fig Four-bar linkage synchronizes two angular movements, φ12 and φ13, with ψ12, and ψ14 Obtain point A′2 by revolving...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 14

Ngày tải lên : 22/10/2012, 14:26

... elements and icons, and 2D drafting and detailing capability, which support design collaboration and compatibility among CAD, CAM, and computer-aided engineering (CAE) applications Designers and engineers ... of the laser to cut through the generally thicker lamination materials and the additional work that must be done to seal and finish the model’s inner and outer surfaces Moreover, the laser cutting ... aluminides, molybdenum disilicide, copper, and aluminum The technique is also called Direct-Metal Fusing, Laser Sintering, and Laser Engineered Net Shaping (LENS) The laser beam under X-Y computer control...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 15

Ngày tải lên : 22/10/2012, 14:26

... and edited the Second Edition of Mechanisms and Mechanical Devices Sourcebook after the death of Mr Chironis The late Nicholas P Chironis developed the concept for Mechanisms and Mechanical Devices ... engineer in the military/aerospace industry and a Boston engineering consulting firm before changing his career path to writing and editing on electronics and electromechanical subjects He was a ... and newspapers on various topics in engineering and industrial marketing Mr Sclater holds degrees from Brown University and Northeastern University, and he has completed graduate courses in industrial...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 12

Ngày tải lên : 22/10/2012, 14:26

... left-handed threads, • An eye on a shank with external righthanded threads, and • A flanged collar with left-handed external threads to mate with the shank of the firstmentioned eye, and right-handed ... connectors In step 5, the handle 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 ... the handle and retention cams as the box is moved rearward and downward 409 Sclater Chapter 12 5/3/01 1:24 PM Page 410 Perpendicular-Force Latch (continued ) dle has been installed on the handle...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 16

Ngày tải lên : 22/10/2012, 14:27

... angular-momentum-balanced, robot ball -and- cone ball -and- disk, and ball -and- screw bearings and roller belt belt -and- chain, variable speed cam for machine tools for tool-slide mechanism two-directional rack -and- gear Links ... adjustable ball, and belt general Graham electrically-coupled planetary ring, and roller, and two curve-slider differential fixed general robot disk adjustable and roller ball, and general planetary ... ring and slider, Jenson’s robot rocker arm and disk roller-dwell rotary, short-dwell rotary-to-reciprocating motion and dwell rotary pump rotating crank screw screw, double-handed sector, rack -and- gear...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 17

Ngày tải lên : 22/10/2012, 14:27

... pump, steam engine, and chronometer, to the cotton gin, and airplane were invented by self-trained engineers, scientists, and technicians By themselves, many of the mechanisms and devices described ... machine design instructors at the college and vocational school level, amateur and professional inventors, and students of all of the engineering disciplines and physical sciences Last but not least, ... anonymous artisans, millwrights, instrument makers, and mechanics over the past centuries They left behind the sketches, formal drawings, and even the working models on which many of the illustrations...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 18

Ngày tải lên : 22/10/2012, 14:27

... Torque Drive Lighter, More-Efficient Helicopter Transmissions Worm Gear With Hydrostatic Engagement Straddle Design of Spiral Bevel and Hypoid Gears CHAPTER COUPLING, CLUTCHING, AND BRAKING DEVICES ... Indicators and Controllers Instant Muscle With Pyrotechnic Power CHAPTER 12 FASTENING, LATCHING, CLAMPING, AND CHUCKING DEVICES Remotely Controlled Latch Toggle Fastener Inserts, Locks, and Releases ... SCREW, AND BALL DEVICES 173 Flat Springs in Mechanisms Pop-Up Springs Get New Backbone Twelve Ways to Put Springs to Work Overriding Spring Mechanisms for Low-Torque Drives Spring Motors and Typical...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 1

Ngày tải lên : 22/10/2012, 14:27

... place and remove parts from annealing furnaces and punch presses, and they assemble and test electrical and mechanical products Benchtop robots pick and place electronic components on circuit boards ... floor-standing, 6-axis, heavy-duty robots with reaches of between and 10 ft, (2.5 and 3.0 m) and maximum payloads of 441 to 880 lb (200 to 400 kg) S-900i robots can perform such tasks as materials handling ... precision gear drives All process and application cables are routed through the arm, and there are brakes on all axes S-900i robots support standard I/O networks and have standard Ethernet ports Process-specific...

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Mechanisms and Mechanical Devices Sourcebook - Chapter 2

Ngày tải lên : 22/10/2012, 14:27

... positioning antenna reflectors, opening and closing security gates, handling materials, and raising and lowering scissors-type lift tables, machine hoods, and light- duty jib crane arms Other linear ... spacing between the light and dark fringes and the resulting electrical pulse rate is determined by the wavelength of the light from the laser For example, the wavelength of the light beam emitted ... two laser beams Because both light beams travel the same distance from the laser to the beam splitter and from the beam splitter to the photodetector, these distances Fig 15 Diagram of a laser...

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Reporting with Web Services and Mobile Devices.

Ngày tải lên : 05/10/2013, 08:48

... WEB SERVICES AND MOBILE DEVICES //declare connection, command and other related objects SqlConnection conReport = new SqlConnection(cnString); SqlCommand cmdReport = new SqlCommand(); SqlDataReader ... reader and populate the dataset cmdReport.CommandType = CommandType.Text; cmdReport.Connection = conReport; cmdReport.CommandText = "Select TOP * FROM Dbo Itinerary"; //read data from command object ... mobile devices These devices are evolving and getting smarter with every passing day Now, users can go wireless and still have access to all their corporate resources, such as e-mail, databases, and...

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Robot Mechanisms and Mechanical Devices Illustrated P2

Ngày tải lên : 17/10/2013, 10:15

... the required task, and design the manipulator and end effector to be only as complex as will accomplish that task Trial and error is the best method in many fields of design, and is especially ... often, and test everything Mobile robots are inherently complex devices with many interactions within themselves and with their environment The result of the effort, though, is exciting, fun, and ... encoder, (b) linear encoder, and (c) laser interferometer 8 Chapter Motor and Motion Control Systems Figure 1-8 Servomotors are accelerated to constant velocity and decelerated along a trapezoidal...

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