G - Physics
09
F
40/51
G09F 19/00 (2006.01) G09F 9/37 (2006.01)
Patent
CA 1270639
-1- ABSTRACT The invention concerns an improvement in a display member of the type comprising a plurality of reference members accommodated within a common chamber filled with an opaque fluid wherein each reference member is independently movable between a display position at which it is in face to face engagement with a display face of the chamber and a non-display position at which it is out of engagement with the display face. The improvement comprises each reference member being associated with a boundary wall which surrounds the sides of the reference member when at its non-display and/or display position. The function of the boundary wall is to direct fluid entering or escaping from the space between the reference member and a face of the chamber adjacent the boundary member.
519642
E.r.g. Management Services Ltd.
Kent Roger S.
Riches Mckenzie & Herbert Llp
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