Card – picture – or sign exhibiting – Changing exhibitor – Fluid operated
Patent
1987-05-26
1989-09-12
Mancene, Gene
Card, picture, or sign exhibiting
Changing exhibitor
Fluid operated
40439, G09F 1900
Patent
active
048647527
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a display member capable of providing a variable display.
In particular the invention relates to a display member of the form disclosed in the International Patent Application PCT/AU83/00177 (WO84/02414).
It has been found that display members of this form suffer from the difficulty that on movement of one reference member between either of its end states the fluid flow produced can result in the displacement of adjacent reference members where a common chamber is used.
It is an object of this invention to at least partially overcome the above difficulty.
In one form the invention resides in an improvement in a display member on 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 and wherein each reference member is associated with a boundary wall which at least partially surrounds the sides of the display member when at its non-display and/or display position.
According to a preferred feature of the invention the edges of the reference member are chamfered.
In another form the invention resides in 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 transparent display face and a non-display position at which it is out of engagement with the display face, said improvement comprising the edges of the display face being bevelled to produce a lens-like effect and magnify the adjacent edges of reference members at the edge of the chamber when in display position.
The invention will be more fully understood in the light of the following description of one specific embodiment. The description is made with reference to the accompanying drawings of which:
FIG. 1 is a partial front view of the display member according to the embodiment;
FIG. 2 is a part sectional elevation of the embodiment; and
FIG. 3 is a part sectional elevation of an edge of the embodiment.
The embodiment relates to a display member comprising a chamber 11 defined between a pair of substantially parallel walls wherein one wall 12 is substantially transparent and defines the front display face of the chamber and the other wall 13 defines the rear wall of the chamber. The chamber 11 accommodates a plurality of substantially square lamina shaped reference members 14 which are supported within the chamber to form an array and are independently movable between the front wall 12 and the rear wall 13. Each refrence member 14 is formed with a rearwardly extending spigot 15 which is accommodated within a rearwardly extending tubular formation 16 on the rear face of the rear wall 13 to be slidably accommodated therein. A suitable drive means is provided between the spigot 15 and the tubular formation 16 to effect controlled movement of the reference member 14 between a display position at which it is in face to face engagement with the front wall and a non-display position at which it is in face to face engagement with the rear wall 13. The chamber 11 is filled with an opaque liquid which facilitates the invisibility of the reference member 14 when in its non-display position.
The display face 17 of the reference member 14 is formed with a plurality of grooves which extend across the face of the reference member 14 and open at the sides thereof. The function of the grooves is to provide a means whereby fluid between the display face 17 and the front wall 12 on movement of the reference member 14 towards the front wall 12 can escape from there-between to facilitate more rapid movement of the reference member 14 to its display position. In addition the grooves 18 serve to reduce but not eliminate th
REFERENCES:
patent: 2173316 (1939-09-01), Sproule
patent: 3346977 (1967-10-01), Rydstrom
patent: 3372501 (1968-03-01), Greene
patent: 3400478 (1968-09-01), O'Keefe
patent: 4178077 (1979-12-01), Te Velde
patent: 4693025 (1987-09-01), Landin
Lynch Michael
Mancene Gene
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