US3198950A
|
|
Line following apparatus having a light source energized by selected phases of a reference voltage
|
US3198949A
|
|
Line following apparatus for a graphical recorder including symmetrical photocell arrangements
|
US3210663A
|
|
R.m.s. meter using opposed thermocouples connected in an automatically rebalanced constant gain servo loop
|
US3050669A
|
|
Optical curve following servomotor control system
|
US3169220A
|
|
Signal ratio measuring system providing constant servo loop gain
|
US3105232A
|
|
Position indication systems
|
US3075132A
|
|
Servosystem with non-contacting electrical transducers
|
US3007102A
|
|
Source of regulated voltage
|
US2958027A
|
|
Velocity servo for graphical recorder time base generator
|
US2945997A
|
|
Graphical recorder chart motor drive system
|
US2976103A
|
|
Character printing graphical recorder
|
US2935368A
|
|
Variable range graphical recorder
|
US2973237A
|
|
Graphical recorder marking pen
|
US2922994A
|
|
Electrical signal generators
|
US2944866A
|
|
Graphical recorders
|
US3052884A
|
|
Graphical recorders
|
US2975370A
|
|
Logarithmic converters
|
US2835856A
|
|
Servo system input and balancing circuit
|
US2881375A
|
|
Servo system
|
US2963684A
|
|
Electrical signal generating apparatus
|