(under subclass 73) Subject matter provided with means for varying the operating characteristics of the electric switch.
(1) Note. In most of the systems in this subclass the switch when operated to one position controls means to change the switch operating characteristics so that the switch will be operated to the reverse position in response to a different change in current and/or potential than that required to operate the switch without such auxiliary means so that the motor circuit may be opened and/or closed a short time before the motor has moved the electrodes to the desired distance of inter-electrode spacing, thereby preventing overrunning of the motor with consequential improper electrode spacing.
SEE OR SEARCH THIS CLASS, SUBCLASS:
70, for systems under subclass 69 provided with an impedance in the motor circuit which acts as a dynamic brake on the motor when the electrodes have been moved to or almost to the proper position.
115, and 116, for miscellaneous systems under the class definition provided with means for regulating the flow of current and/or voltage to the electromagnet which operates and/or controls the electrode feeding mechanism.
