Mechanisms and Mechanical Devices Sourcebook - Chapter 10
Mechanisms and Mechanical Devices Sourcebook - Chapter 10
... CHAPTER 10TORQUE-LIMITING,TENSIONING, ANDGOVERNING DEVICESSclater Chapter 10 5/3/01 1:07 PM Page 339 340CALIPER 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...
Ngày tải lên: 22/10/2012, 14:26
Mechanisms and Mechanical Devices Sourcebook - Chapter 3
... CHAPTER 3PARTS-HANDLINGMECHANISMSSclater Chapter 3 5/3/01 10: 19 AM Page 51 5 2MECHANISMS THAT SORT, FEED,OR WEIGHORIENTING DEVICESHere’s a common problem; Parts arrive in either open-end ... feed mechanisms. Sclater Chapter 3 5/3/01 10: 20 AM Page 62 63Sclater Chapter 3 5/3/01 10: 20 AM Page 63 64Sclater Chapter 3 5/3/01 10: 20 AM Page 64 65SEVEN LINKAGES FOR TRANSPORTMECHANI...
Ngày tải lên: 22/10/2012, 14:26
Mechanisms and Mechanical Devices Sourcebook - Chapter 4
... varied to suit many differing requirements .108 Sclater Chapter 4 5/3/01 10: 45 AM Page 108 109 A cam-driven ratchet.A six-sided Maltese cross and dou-ble driver give a 3:1 ratio.A cam operated ... 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,incl...
Ngày tải lên: 22/10/2012, 14:26
Mechanisms and Mechanical Devices Sourcebook - Chapter 5
... belt, steel band, or rope around the drum is fastened to the drivingand driven members; sprocket-wheels and chain can replace the drum and belt.Fig. 9 Matching gear-segments.Fig. 10 Racks and coupled ... 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...
Ngày tải lên: 22/10/2012, 14:26
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 ... stictionless and neg-ligible hysteresis characteristics. Thebearing is radiation-resistant and can beused in high vacuum conditions or inenvironments where there is dirt andcontaminati...
Ngày tải lên: 22/10/2012, 14:26
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 ... frequentlyemployed in automatic-feed mechanismsand screw machines They are the circular,constant-velocity, simple-harmonic,cycloidal, modified cycloidal, and circu-...
Ngày tải lên: 22/10/2012, 14:26
Mechanisms and Mechanical Devices Sourcebook - Chapter 8
... CHAPTER 8GEARED SYSTEMS ANDVARIABLE-SPEEDMECHANISMSSclater Chapter 8 5/3/01 12:42 PM Page 241 Gears are versatile mechanical components capable of per-forming many different ... 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 havecapaci...
Ngày tải lên: 22/10/2012, 14:26
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 potenti...
Ngày tải lên: 22/10/2012, 14:26
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 ... 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 sh...
Ngày tải lên: 22/10/2012, 14:26
Mechanisms and Mechanical Devices Sourcebook - Chapter 13
... 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 ... four-bar crank -and- rocker mechanism problem can nowbe obtained with only the accompanying table and a calculator.An example in this knee-joint tester designed and built by fo...
Ngày tải lên: 22/10/2012, 14:26