list input and output devices and define them
Mechanisms and Mechanical Devices Sourcebook - Chapter 3
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... knocking his hand out of the way), (4) are fail-safe, (5) are sen-
sitive enough to operate instantly, and (6) render the machine inoperative if anyone
attempts to tamper with them or remove them.
Safety ... 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 ... commonly used for accomplishing this job.
SIMPLE FEEDING DEVICES
The oscillating sector picks
up the desired number of parts,
left diagram, and feeds them by
pivoting the required number of
degrees....
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Mechanisms and Mechanical Devices Sourcebook - Chapter 4
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... 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 ... then the
output ratio, defined as:
is equal to:
Now, if r
1
= r
4
and r
2
= r
3
, there is no
“differential motion” and the output
remains stationary. Thus if one gear pair,
say
3 and 4, is ... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 5
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... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 6
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... 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 ... 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 BANDS ... and
drives a dowel pin for locking purposes. A right- and
left-handed shaft (C) actuates a press.
Sclater Chapter 6 5/3/01 12:25 PM Page 192
Do you need a buffer between vibrating
machinery and...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 7
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... 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, ... conveying, and elevating.
STANDARD ROLLER CHAIN—FOR POWER TRANSMISSION AND CONVEYING
SINGLE WIDTH—Sizes
5
⁄
8
in and smaller have a spring-clip connect-
ing link; those
3
⁄
4
in and larger...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 8
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... 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 ... balance between
transmitted torque and operating life.
Input and output functions always
rotate in the same direction, irrespective
of the number of bearings, and different
results can be achieved ... of
the input shaft. Input shaft
a carries spur
gear
c, which has approximately twice
the face width of spur gears
f and d
mounted on output shaft b. Spur gear c
meshes with idler e and with...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 9
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... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 10
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... 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 ... gears
must be held apart to prevent them from being
stripped. With the driver off, the gears can safely be
reset.
Fig. 7 A cammed sleeve connects the input and output shafts of this
torque limiter. ... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 11
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... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 13
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...
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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 14
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... permit lettering, callouts, and the entry of notes and
parts lists, and some even offer the capability for calculating such
physical properties as volume, weight, and center of gravity if the
drawing ... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 15
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... Technologies Group, Radford, VA
• Ledex Actuation Products, TRW Control Systems, Vandalia OH
• Sandia National Laboratories, Sandia Corporation, Albuquerque, NM
• SolidWorks Corporation, Concord, MA
• ... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 12
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... vehicle and plate.
POSITIVE LOCKING AND QUICK-RELEASE MECHANISM
The object here was to design a simple device that would
hold two objects together securely and quickly release them
on demand.
One ... 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 ... 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...
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Mechanisms and Mechanical Devices Sourcebook - Chapter 16
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...
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 ...
158
ring gear and slider
450
ring and slider, Jenson’s
450
robot
34
rocker arm and disk
123
roller-dwell
119
rotary, short-dwell
112
rotary-to-reciprocating motion and dwell
116 ...
primary
348
secondary
348
speed and tension
350
temperature
220 349
Inductosysns (See sensors feedback)
Input/ output (I/O)ports
7
Instruments, recording and controlling
397
Integrated...
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