US PATENT CLASS 33
Class Notes
Current as of: June, 1999
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DEFINITION
Classification: 33/
This class provides for means for determining the characteristics and the mutual relation of points, lines, angles, surfaces, and solids, considered as having no properties but those arising from extension and difference of situation. It includes mechanically guided means for describing lines. Processes or methods are classified in the appropriate subclasses with instruments unless specifically provided for by a process subclass. For the most part specific subclasses are not provided for compound instruments; but an invention comprising matter classifiable in more than one specific subclass is placed in the subclass having the lowest number and cross-referenced into the subclass or subclasses having the higher number or numbers.
(1) Note. This class includes the combination of recording means with significant measuring structures of the type provided for in this class.
(2) Note. The following matter is excluded: The measurement of fluent material. Instruments falling in this class in combination with check-controlled means or in combination with a series of signals exceeding two. Observation instruments in which the principle of operation depends upon diverting light. Means for guiding or stopping tools other than scribers. Means for automatically assorting objects. Means connected with a device classifiable elsewhere to automatically indicate the relative position of movable parts of said device. (This does not refer to means connected with a device classifiable elsewhere to indicate the position of said device with relation to other things not a part of the device).
REFERENCES TO OTHER CLASSES
SEE OR SEARCH CLASS
7, Compound Tools,
150, for hand saws combined with straight edges, levels, etc., to be used as gauges, try squares, etc.
34, Drying and Gas or Vapor Contact With Solids, 89.2, for the combination of a straightedge with a blotter.
73, Measuring and Testing, appropriate subclass for combinations of geometrical instruments with other characters of measuring and testing devices.
84, Music,
461+, for devices for recording the movement of keys of a keyboard.
194, Check-Actuated Control Mechanisms, appropriate
subclasses for instruments of the type found in this class in combination with check-controlled means for restricting their use.
338, Electrical Resistors,
13+, for electrical resistors whose resistance value is responsive to a condition or with a condition sensing actuator, no structure being claimed such as a meter for indicating the resistance value. See also section XVI of the class definitions of Class 338.
340, Communications: Electrical,
870.01+, for telemetric means per se comprising electrical transmitting means in combination with means designed to be located at a distance having a movable indicator electrically controlled by the transmitter but not limited to any particular instrument. The combinations of telemetric signaling means with measuring means of the type provided for in Class 33 are in Class 33.
346, Recorders, appropriate subclasses for recorders, per se.
356, Optics: Measuring and Testing, for optical angle, distance, alignment, or configuration determining or measuring instruments, or other mensuration or fiducial instruments. See sections III and V of the Class 356 definitions for the particular measuring instruments found in Classes 33 and 356. 374, Thermal Measuring and Testing,
6+, for determining a distance or position by measuring a related thermal quantity.