Mechanisms and Mechanical Devices Sourcebook - Chapter 7
Mechanisms and Mechanical Devices Sourcebook - Chapter 7
... composedof circular arc 1-2 with center at 02, arc 3-4 with center at 03, arc 4-5 with center at01, arc 5-6 with center at 04, arc 7- 1 withcenter at 01, and the straight lines 2-3 and6 -7 . The method calls ... links II and III come into toggle.Sclater Chapter 7 5/3/01 12:33 PM Page 212213SIXTEEN LATCH, TOGGLE, AND TRIGGER DEVICESDiagrams of basic latching and quick-release mechanisms. Fig. 1 Cam-guided ... turned with radii r1,r3, and r4. One such piece is shown inFig. 7. The templates have hubs that fitinto the drilled holes at 01, 03, and 04.Next the arcs 7- 1 , 3-4 , and 5-6 are filedwith the hardened...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 3
... CHAPTER 3PARTS-HANDLINGMECHANISMSSclater Chapter 3 5/3/01 10:19 AM Page 515 2MECHANISMS THAT SORT, FEED,OR WEIGHORIENTING DEVICESHere’s a common problem; Parts arrive in either open-end ... movement, andthe top disk provides the up -and- down force necessary for thecutting action.This four-bar linkagewith an extended couplercan cut a web on the runat high speeds. The four-bar linkage ... The feed can be contin-uos or as required.A rotary screw-feed handlesscrews, headed pings, shoulderedshafts, and similar parts in mosthopper feeds, random selection ofchance-oriented parts calls...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 4
... smoothness and flexibil-ity in converting constant rotary motioninto a start -and- stop type of indexing.It works equally well for high-speedoperations, as fast as 2 seconds per cycle,including index and ... favorablehigh-speed characteristics for stop -and- go mechanisms isr3= R3The profile defined by this equationhas, among other properties, the charac-teristic that, at transition from rest tomotion and vice ... during jam-ups.• Its built-in anti-backlash gear systemaverts rebound effects, play, and lostmotion during stops.How it works. Input from a singlemotor drives an eccentric disk and con-necting...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 5
... CHAPTER 5SPECIAL-PURPOSEMECHANISMSSclater Chapter 5 5/3/01 11:45 AM Page 1 27 128NINE DIFFERENT BALL SLIDES FOR LINEAR MOTIONFig. 1 V-grooves and flat surface make a ... tilting and uncertaintyin the distance between the plates). Otherprior mechanisms relied on spring load-ing, differential multiple-point drives andother devices to reduce backlash. In pro-viding ... inven-tors include Evans, Tchebicheff, Roberts ,and Scott-Russell.Four-bar arrangement. Like othermechanisms that aim at straight-linemotion, the Daniel design is based on thecommon four-bar linkage....
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Mechanisms and Mechanical Devices Sourcebook - Chapter 6
... A standard rotat-ing-air fitting is required.Reciprocating linear force link: It recipro-cates with one-, two-, or three-convolutionair springs in a back-to-back arrangement.Two- and three-convolution ... CHAPTER 6SPRING, BELLOW,FLEXURE, SCREW, ANDBALL DEVICESSclater Chapter 6 5/3/01 12:24 PM Page 173 FLAT SPRINGS IN MECHANISMS1 74 Constant force is approached because of the length of this U-spring. ... stictionless and neg-ligible hysteresis characteristics. Thebearing is radiation-resistant and can beused in high vacuum conditions or inenvironments where there is dirt andcontamination.185TAUT BANDS AND...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 8
... which control radial position andtherefore control the orbit. Ring and sundisks are spring-loaded.DISK DRIVESSclater Chapter 8 5/3/01 12:42 PM Page 2 47 248Ring -and- pulley drive (Fig. 9). Athick ... losses in the gears and bearings andfrom windage and churning of lubricant.gear power: A gear’s load and speed capacity, determined bygear dimensions and type. Helical and helical-type gears havecapacities ... cams. During nuta-tion the nutator is held from rotating by the stator, which trans-mits the reaction forces to the housing.* Four U.S. patents (3,094,880, 3,139 ,77 1, 3,139 ,77 2, and 3,590,659)have...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 9
... Rzappa-type jointto get the desired effect.Ball -and- socket. Basically, the True-Speed joint is a system of ball -and- socket connections with large contactareas (low unit pressure) to transmit tor-sional ... ofMIL-E-5400, class 3 and MILK-3926specifications.Applications were seen in counter andreset switches and controls for machinesand machine tools, radar systems, andprecision potentiometers.Eight-Joint ... slip-spring coupling. Fig. 6 An internal ratchet and spring-loaded pawls. Fig. 7 A one-way dog clutch.Sclater Chapter 9 5/3/01 12: 57 PM Page 311312SPRING-LOADED PINS AID SPRAGS IN ONE-WAY...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 10
... CHAPTER 10TORQUE-LIMITING,TENSIONING, ANDGOVERNING DEVICESSclater Chapter 10 5/3/01 1: 07 PM Page 339340CALIPER BRAKESHELP MAINTAINPROPER TENSIONIN PRESS FEEDA simple cam -and- linkage ... warning light and second tolight a red bulb and also sound an alarmbell.Over-the-side or over-the-rear loadingrequires a different setting of theBourdon pressure-gage unit than doesover-the-front loading. ... signal devices. The load plunger and the swaged-on cable termina-tion have ball -and- socket seat sections to permitmaximum free cable movement, reducing the possi-bility of fatigue failure. A split-coupling...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 11
... steel, monel, andbronze for handling acids, oils, and sol-vents. The impeller is made of pressure-vulcanized laminated layers of Hycar, 85 to90 percent hard. Sand, grit, scale andfibrous materials ... 1,300rpm by a steam turbine.Sclater Chapter 11 5/3/01 1:15 PM Page 373 374 ROTARY-PUMP MECHANISMSFig. 1 (A) A Ramelli pump with spring-loaded vanes to ensure con-tact with the wall; vane ends are ... to a minimum. Thisheavy-duty gear pump can be used at pressures up to 1,000 psi.These pumps were made with either single- or double-endshafts and can be foot- or flange-mounted. The drive shaftentrance...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 13
... discussed here.447Sclater Chapter 13 5/3/01 1:32 PM Page 4 47 448DESIGN CURVES AND EQUATIONS FOR GEAR-SLIDER MECHANISMSWhat is a gear-slider mechanism? It islittle more than a crank -and- slider withtwo ... forthe transmission optimization of crank -and- rocker linkages, but also for othercrank -and- rocker design. For example, ifonly the rocker swing angle and the cor-responding crank rotation are prescribed,the ... GEARED FIVE-BAR MECHANISMSGeared five-bar mechanisms offer excellent force-transmission characteristics and can producemore complex output motions—including dwells—than conventional four-bar mechanisms. It...
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