B
SECTION B — PERFORMING OPERATIONS; TRANSPORTING
  
TRANSPORTING
 B64
AIRCRAFT; AVIATION; COSMONAUTICS
 B64B
LIGHTER-THAN-AIR AIRCRAFT (ground installations for aircraft in general B64F)
 B64B 1/00
Lighter-than-air aircraft
 B64B 1/02
·  Non-rigid airships (B64B 1/58 takes precedence; balloons B64B 1/40)
 B64B 1/04
·  ·  the profile being maintained by ties or cords connecting opposite surfaces
 B64B 1/06
·  Rigid airships; Semi-rigid airships (B64B 1/58 takes precedence)
 B64B 1/08
·  ·  Framework construction
 B64B 1/10
·  ·  Tail unit construction (B64B 1/12 takes precedence)
 B64B 1/12
·  ·  Movable control surfaces
 B64B 1/14
·  ·  Outer covering
 B64B 1/16
·  ·  ·  rigid
 B64B 1/18
·  ·  ·  Attachment to structure
 B64B 1/20
·  ·  provided with wings or stabilising surfaces
 B64B 1/22
·  ·  Arrangement of cabines or gondolas
 B64B 1/24
·  ·  Arrangement of propulsion plant (B64B 1/34 takes precedence)
 B64B 1/26
·  ·  ·  housed in ducts
 B64B 1/28
·  ·  ·  housed in nacelles
 B64B 1/30
·  ·  ·  Arrangement of propellers
 B64B 1/32
·  ·  ·  ·  surrounding hull
 B64B 1/34
·  ·  ·  ·  of lifting propellers
 B64B 1/36
·  ·  Arrangement of jet reaction apparatus for propulsion or directional control
 B64B 1/38
·  ·  Controlling position of centre of gravity
 B64B 1/40
·  Balloons (B64B 1/58 takes precedence; toy balloons A63H 27/10)
 B64B 1/42
·  ·  Construction or attachment of stabilising surfaces
 B64B 1/44
·  ·  adapted to maintain predetermined altitude
 B64B 1/46
·  ·  associated with apparatus to cause bursting
 B64B 1/48
·  ·  ·  to enable load to be dropped by parachute
 B64B 1/50
·  ·  Captive balloons
 B64B 1/52
·  ·  ·  attaching trailing entanglements
 B64B 1/54
·  ·  ·  connecting two or more balloons in superimposed relationship
 B64B 1/56
·  ·  ·  stabilised by rotary motion
 B64B 1/58
·  Arrangements or construction of gas-bags; Filling arrangements
 B64B 1/60
·  ·  Gas-bags surrounded by separate containers of inert gas
 B64B 1/62
·  ·  Controlling gas pressure, heating, cooling, or discharging gas
 B64B 1/64
·  ·  Gas-valve operating mechanisms
 B64B 1/66
·  Mooring attachments (mooring masts B64F 1/14)
 B64B 1/68
·  Water flotation gear
 B64B 1/70
·  Ballasting arrangements