4. Electricity: motor control systems
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Electronic speed control interlock

Electricity: motor control systems – Open loop speed control system for dc motor with commutator – Analog armature control
Patent

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Error signal detection circuit in a servo control device

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent

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Fan control system

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate

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Fan motor with digital controller for applying substantially...

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate

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Fan motor with its speed controlled by operating periods of...

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate

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Fan speed control

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator
Reexamination Certificate

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Fan speed control circuit

Electricity: motor control systems – Open loop speed control system for dc motor with commutator – Analog armature control
Reexamination Certificate

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Fan speed control circuit

Electricity: motor control systems – Open loop speed control system for dc motor with commutator – Analog armature control
Patent

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Fan speed control device and method detailed description of...

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Analog armature control
Reexamination Certificate

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Fan speed control system having an integrated circuit fan...

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Reexamination Certificate

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Fault current limiter for DC motor drive system

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Patent

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Feedback circuitry for D.C. motor speed control

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent

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Field current control method in motor

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Reexamination Certificate

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Flexible disk drive device

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent

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Fully-integrated VCM driver with controlled and predictable...

Electricity: motor control systems – Specific control circuit element or device – Bridge circuit
Reexamination Certificate

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General purpose 100% solid state drive for direct current...

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Field control – or field and armature control – by analog...
Reexamination Certificate

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Hard disc drive for use in a multiple drive data storage system

Electricity: motor control systems – Specific control circuit element or device – Computer or microprocessor
Patent

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High frequency control circuit for DC motors, particularly for w

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent

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High-turndown DC motor controller and method

Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent

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HVAC fan-powered terminal unit having preset fan CFM

Electricity: motor control systems – Open loop speed control system for dc motor with commutator – Analog armature control
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