... rotating
handwheel with a differential screw moves nuts
A
and B together, and links I and II are brought into
toggle.
Fig. 13 A riveting machine with a reciprocating
piston produces a high mechanical ... maximum
value when links II and III come into toggle.
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213
SIXTEEN LATCH, TOGGLE, AND TRIGGER DEVICES
Diagrams of basic latching and...
... 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 ... by various mechanical devices. One
of these is the use of internal lands or ball bearings and slots or
races that convert a pull-in stroke to rotary or twisting motion.
Motion con...
... front and back
labels.
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Viscous liquid adhesives are used to glue fab-
rics and paper, apply paper labels, make card-
board and wooden boxes and shoes, and ... side arms grasp and move packages.
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73
TRAVERSING MECHANISMS FOR
WINDING MACHINES
The seven mechanisms shown are parts of different yarn-...
... 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 ... Page 111
CHAPTER 4
RECIPROCATING AND
GENERAL-PURPOSE
MECHANISMS
Sclater Chapter 4 5/3/01 10:44 AM Page 93
Cycloidal motion is popular for mechanisms
in feeders and automatic mac...
... 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 ... rotation,
and that there be a zero gap between sec-
tor and saddle nut.
Pivots with a Twist
A multipin flexure-type pivot, developed
by Smiths Industries in England...
... or
gasoline engines, larger diesel engines,
and small steam turbines.
365
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366
SPEED CONTROL DEVICES FOR MECHANISMS
Friction devices, actuated by centrifugal force, ... preparation in a coil that is sound
and slip-free. An automatic, constant-
350
Speed and Tension Control (continued )
Fig 4 Floating rolls are direct indicators of speed an...
... left-handed
threads,
• An eye on a shank with external right-
handed threads, and
• A flanged collar with left-handed external
threads to mate with the shank of the first-
mentioned eye, and right-handed ... Chapter 12 5/3/01 1:25 PM Page 415
416
DETENTS FOR STOPPING MECHANICAL MOVEMENTS
Some of the more robust and practical devices for
stopping mechanical movements are illustrat...
... 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 ... tools, and axes J5 and J6 have precision gear
drives. All process and application cables are routed through the
arm, and there are brakes on all axes.
S-900
i robots sup...
... 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 bene...