b
Vert
™
~N
/
Sensing
Hend
o
1-KC
Oscillator
Rrush
Penmotor
Srush
tecorder
Uertemh
Punmotor
f\
Vo}
DC
Amplifier
pc
Amplifier
Amplifier
Modulated
Corriur
Low Gain for "ii" Pon
High Guin for "A" Pen
Huthe
4:1
Frequoncios to
be Filtered Out
Reproduced
Prossure Munetlon
Which Ilun Some
Undesirable
Demodulutor
Phase
Sunsltive
Fix. 6.6--Cenerual theory of operation of miccuburugraph syatem,
a
'
rr
Wionekeo
‘Twisted Bourdon ‘Tubs
nad Armature with 4-Arm
Neluctonce ridge
Hone ~S\
Arruy
of Prussure
Changing Function
r-------t-