(under the class definition) Systems provided with two control means located at different places in the supply circuit for controlling the supply of current to the load device, the two of the control means each being designed to
perform the same control functions as that performed by the other of the two control means, irrespective of the condition of operation of the other of the two control means.
(1) Note. This subclass includes systems wherein two switches are provided in the circuit of the load device, each of the switches being connected in the circuit so that it can open or close the circuit of the load device, irrespective of the position of the other switch. Also, included in this subclass are systems wherein a single switch opens and closes the supply circuit to the load device, this switch being operable by either of two remotely located switches.
(2) Note. This subclass also includes cross references of patents wherein the control means for the current supply for the load device is a current regulator, the system being designed so that the regulation may be effected from two or more different points.
(3) Note. This subclass does not include systems wherein two or more control means, such as electric switches, are connected in the circuit in such a manner that if one of the control means is in the operated position to deprive the load device of current, the other control means, even if placed in the "on" position cannot close the circuit to supply current to the load device because of the position of operation of the first control means. For such systems, where the control means is a regulator, search this class, subclass 299, and indented subclasses and where the control means is a switch, search this class, subclass 362.
SEE OR SEARCH THIS CLASS, SUBCLASS:
272, see (3) Note above. 299, see (3) Note above.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnnection Systems,
113+, for systems of general application provided with two or more control means located at different places for controlling the supply of current or potential to a load device.
