US PATENT SUBCLASS 318 / 676-- .~.~ Transmitter or controller element returned (e.g., force balance systems)

US PATENT SUBCLASS 318 / 676
.~.~ Transmitter or controller element returned (e.g., force balance systems)

Current as of: June, 1999
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318 /	HD	ELECTRICITY: MOTIVE POWER SYSTEMS

560	DF	POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
671	DF	.~ With particular motor control system responsive to the "actuating signal" {10}
676		.~.~ Transmitter or controller element returned (e.g., force balance systems)

DEFINITION

Classification: 318/676

(under subclass 671) Subject matter in which means are provided for causing the follow-up motor to return the transmitter to its normal or original position at which position the motor is not adapted to run or operate.

(1) Note. An example of a transmitter returned follow-up arrangement comprises a differential gearing where in one element is driven by a control shaft, another element is driven by a controlled motor and the third element devices a circuit controlling means such as a switch. When the switch is in the neutral position, the arrangement is at rest. If the control shaft turns, the third element of the gearing drives the switch to an operating position to initiate operation of the motor to drive the second gearing element to drive the third gearing element to return the switch to neutral. The following is an illustrative example.

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