Electricity: motive power systems – Positional servo systems – Limit or end-stop control
Patent
1979-03-09
1981-02-10
Dobeck, B.
Electricity: motive power systems
Positional servo systems
Limit or end-stop control
318663, 318468, G05G 500
Patent
active
042504414
ABSTRACT:
The servo apparatus includes a series resistor string connected in parallel with the body of the servo slidewire resistor. Upscale and downscale travel limit voltage points, corresponding to upscale and downscale travel limit positions for the slidewire contact, are established along the resistor string. The limit voltages on the limit voltage points are separately compared with the slidewire contact voltage, and appropriate motor drive signal interrupting signals are produced when the slidewire contact voltage exceeds the upscale limit voltage or drops below the downscale limit voltage. The interrupting signals effect their motor drive signal interrupting action by reversing the output polarity of motor drive comparators which produce the motor drive signals under the control of an error amplifier which compares the apparatus input voltage to the slidewire contact voltage.
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Chapman James
Ratz James W.
Burton Lockwood D.
Dobeck B.
Halista Mitchell J.
Honeywell Inc.
Marhoefer Laurence J.
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