US PATENT SUBCLASS 60 / 527
.~ Mass is a solid

Current as of: June, 1999
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60 /   HD   POWER PLANTS

516  DF  MOTOR OPERATED BY EXPANSION AND/OR CONTRACTION OF A UNIT OF MASS OF MOTIVATING MEDIUM {3}
527.~ Mass is a solid {2}
528  DF  .~.~> Mass heated because of resistance to flow of electric current
529  DF  .~.~> Mass is bimetallic

DEFINITION

Classification: 60/527

(under subclass 516) Apparatus which the unit of matter is a solid.

(1) Note. This subclass includes patents which employ a mass which is in a solid state during at least a portion of a cycle of its operation. During other portions of the cycle of its operation, a given mass (e.g., wax) may change to a liquid state, or another mass (e.g., metallic hydride) may change to a gaseous state.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

26, for magnetostrictive motors wherein a magnetic field is employed to cause a material to expand and contract to do work.

337, Electricity: Electrothermally or Thermally Actuated Switches,

333+, and 382+ for switches actuated by the expansion or contraction of bimetallic or other metallic members.

374, Thermal Measuring and Testing,

187, for temperature measurement in which the expansion or contraction of a sensing material drives an indicator.