Card – picture – or sign exhibiting – Display device with gas or liquid movement
Patent
1993-02-03
1994-11-29
Green, Brian K.
Card, picture, or sign exhibiting
Display device with gas or liquid movement
40412, 446166, 239 20, G09F 1900
Patent
active
053678052
ABSTRACT:
Provided is an apparatus and method for hydraulically powering a moving display. In accordance with the apparatus, there is provided a housing having an actuating member affixable thereto. There is further provided a reservoir means in fluid communication with the housing for storing a liquid and a pump in fluid communication with the reservoir and housing for pumping the liquid into the housing at a selected orientation and rate of flow. A liquid receiving cup is disposed within the housing and affixed to the actuating member such that the cup may be lowered within the housing by the weight of the received liquid. A distance limitation member proximate the liquid-receiving cup is provided for restricting the vertical distance the cup may travel within the housing and facilitating the release of the received liquid. The actuating member is actuated in timed relation to the vertical movement of the cup within the housing so as to power a mechanical or electrical display or the like.
REFERENCES:
patent: 1064873 (1913-06-01), Thowless
patent: 1635978 (1927-07-01), Ross
patent: 2884200 (1959-04-01), Konikson
patent: 3665638 (1972-05-01), Weistrop
patent: 4413778 (1983-11-01), Middlemiss
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