(under subclass 400) Subject matter comprising a land based steering datum for cooperating with a datum sensing means on a vehicle wherein the datum sensing means cooperates with control means for steering the vehicle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
167+, for a motor vehicle having means for controlling its operation responsive to either electromagnetic radiation, magnetic force, or sound waves received from a source, or reflected from an object or surface, located apart from the vehicle.
SEE OR SEARCH CLASS
104, Railways,
244.1, for a derailment guard for a railway vehicle, which guard includes a vehicle-mounted feeler element which is adapted to contact an existing channel or furrow in or on the ground and to guide the vehicle in a course which corresponds to that of the channel or furrow.
172, Earth Working, 23+, and particularly indented subclass 26, for earth working apparatus provided with means adapted to contact an elongate shoulder or a channel on or in the ground for the purpose of guiding the apparatus.
280, Land Vehicles,
87.2, for a land vehicle of the wheeled type provided with means whereby one or more of its wheels may be steered by an occupant and wherein the steering means controls also a wheel which is offset from the principal supporting wheel of the vehicle but which, by its own turning (i.e., pivotable) movement, is able to effect turning movement of certain of the principal wheels; and subclass 776 for a wheeled vehicle of the occupant steered type wherein bias means is provided for maintaining a steerable wheel in engagement with an elongate, more or less vertical surface (e.g., curb) for a vehicle-steering purpose.
