(under the class definition) Subject matter wherein the claimed apparatus comprises means whereby the completion or interruption of at least one electrical circuit is accomplished by means utilizing either the phenomenon wherein some materials experience an elastic strain as the result of an electric field, this strain being independent of the polarity of the field or by means utilizing the laws of electrostatics, i.e., the phenomena wherein, due to the mutual repulsion of all electricity for electricity of the same kind (of like polarity), a conductor of one polarity with its surrounding electric field is caused to attract or repulse another conductor with an electric field.
(1) Note. All crystals, in addition to their first order piezo-electric effect, have a second order electrostrictive effect in which a distortion occurs which is proportional to the electric displacement. Patents in which piezo-electric devices are utilized for their electrostrictive effect, for the purpose of causing the control of one or more electric circuits, are to be found here.
SEE OR SEARCH CLASS
40, Card, Picture, or Sign Exhibiting,
463+, for changeable exhibitors which may utilize electrostrictive or electrostatic effects for controlled action.
102, Ammunition and Explosive Devices, 200+, for fuses or ignition devices utilizing electrical magnetic wave or radiant energy.
307, Electrical Transmission or Interconnection Systems,
91, for devices for magnetic or electrostatic field control, subclass 104 for electromagnet and highly inductive connection systems, subclass 109 for pulse producing systems utilizing the discharge of a capacitor and subclasses 125+ for switching systems responsive to electrical conditions and which may utilize electrostrictive or electrostatic principles.
310, Electrical Generator or Motor Structure,
300, for nondynamo-electric generator or motor structure, subclasses 311+ for piezo-electric devices, per se, and subclasses 10+ for dynamo-electric generator or motor structure.
318, Electricity: Motive Power Systems,
118, for magnetostrictive motor devices.
324, Electricity: Measuring and Testing,
74, for motor type devices which may utilize the electrostrictive or electrostatic principles, subclass 109 for devices for measuring or testing electricity and consisting of piezo-electric or electrostatic devices and subclass 144 for testing devices with an electromagnetic field.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
509+, for miscellaneous externally effected circuits.
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, 18, for automatic circuit breaking devices responsive to reverse currents or voltages, subclass 35 for automatic circuit breaking devices with trip means which may depend in part on electrostrictive or electrostatic means, subclasses 78+ for switching devices in which the movement of an armature depends upon the direction of a current in the armature controlling circuit, subclass 215 for relay devices utilizing the magnetostrictive principle for obtaining mechanical force, subclass 223 for relays utilizing relatively movable conductors, e.g., dynamometer type.
336, Inductor Devices, appropriate subclasses for particular inductor arrangements.
347, Incremental Printing of Symbolic Information,
112+, for electrostatic marking.
361, Electricity: Electrical Systems and Devices,
207, for electric circuits for relays and electromagnets which utilize the electrostatic principle, subclasses 258+ for electrostatic igniting systems.
