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Factory
air line
Regulator
Filter
Adjustable
restrictor
1
(a)
Workpiece
(e)
Atmospheric bleed for
indicator zeroing
Indicator
Bourdon tube
Fixed
restrictor
Gage head
Figure 8.3 Diagram of air gage principles.
Indicator
Indicator
Mechanical
amplifying device
Bellows
Factory
air line
Filter
Fixed restrictor
To gage head
Mechanical amplifying device
Regulator
2
3
1
Factory
air line
Regulator
Developed
glass tube
Factory
air line
Regulator
(b) (c) (d)
3
1
2
3 1
(f) (g) (h) (i)
Indicator
Bellows
Large venturi
chamber
To gage head
Reprinted with permission of the Society of Manufacturing Engineers, Manufacturing Processes and Materials, 4th edition, copyright 2000.
Filter
Filter
1
2 2
3
Airflow
lines
3
Mechanical
amplifying
device
Small
venturi
chamber
Indicator
adjusting
knob
Chapter 8: B. Special Gages and Applications 81
Part II.B.3