US PATENT SUBCLASS 116 / 151
.~ Pneumatic actuation
Current as of: June, 1999
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DEFINITION
Classification: 116/151
(under subclass 148) Bells in which pneumatic means are used for moving the bell or controlling its motion.
SEE OR SEARCH THIS CLASS, SUBCLASS:
58, for vehicle energy actuated pneumatic signals.
65, for pneumatic signals.
70, for fluid pressure variation operated alarms.
139, for motor exhaust or suction actuated horns or whistles.
SEE OR SEARCH CLASS
91, Motors: Expansible Chamber Type, for expansible-chamber type motors intended to operate bells. Where any significant structure of the bell operated by the motor is claimed, the patent is provided for in Class 116. Merely reciting the bell by name only or stating that the bell has a striker movable into and out of engagement with the bell is not considered significant structure such as would exclude patents from Class 91. A recitation that the bell is mounted so as to be swung or is provided with crank means for moving the bell is considered to be sufficient structure to cause classification in Class 116.
418, Rotary Expansible Chamber Devices, appropriate subclasses for rotary expansible chamber motor actuated bells and see the search note to Class 91 above for the line between this class (116) and Class 91, for line between this class (116) and Class 418 being the same.
