US PATENT SUBCLASS 212 / 276
HAVING RANDOM CONDITION SENSOR COMBINED WITH AN INDICATOR OR ALARM OR CONTROLLING MEANS OR DISABLING MEANS

Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

276HAVING RANDOM CONDITION SENSOR COMBINED WITH AN INDICATOR OR ALARM OR CONTROLLING MEANS OR DISABLING MEANS {5}
277  DF  .~> Senses crane tilt (e.g., outrigger sensors)
278  DF  .~> Means determining overloading produced by load (e.g., strain gauges)
279  DF  .~> Sensor regulates counterweight or counterbalancing means
280  DF  .~> Boom movement stops responsive to overtravel or proximity to powerline
281  DF  .~> Hoisting stops upon load being raised to a predetermined position (e.g., anti-two block)

DEFINITION

Classification: 212/276

HAVING RANDOM CONDITION SENSOR COMBINED WITH AN INDICATOR OR ALARM OR CONTROLLING MEANS OR DISABLING MEANS:

(under the class definition) Subject matter including means for detecting the random occurrence of a predetermined situation and releasing, terminating, or modifying a flow of energy which in turn either produces a visually or audibly perceptible manifestation of the event or regulates a controlling or disabling means (e.g., motor, valve, solenoid, etc.).

(1) Note. The term "random" excludes cyclic or repetitive operations or movement.

SEE OR SEARCH CLASS

340, Communications: Electrical,

685, for a condition-responsive indicating system for a crane wherein no structural details of the crane are recited.