Card – picture – or sign exhibiting – Changing exhibitor – Rotatable carrier for display item
Patent
1995-03-10
1996-04-30
Green, Brian K.
Card, picture, or sign exhibiting
Changing exhibitor
Rotatable carrier for display item
74606R, 74665GB, G09F 1102
Patent
active
055113303
ABSTRACT:
A transmission system for louver type signs wherein the signs consist of a plurality of multiple faced louvers having indicia defined thereon and the side-by-side relationship of the louvers permits pre-selected faces to define a completed image and simultaneous partial rotation of the louvers presents a new visible image, and wherein, each louver is operated by a separate "T" drive bevel gear transmission having an output shaft upon which a louver is mounted operatively connected to a drive shaft perpendicularly related to the output shaft. The drive shafts of adjacent transmissions are interconnected and a plurality of transmissions are simultaneously operated by a single motor drive source. The cost of the transmissions is significantly reduced by the use of a unique bearing support system for the drive and output shafts eliminating the need for separate bearings in that the material of the transmission casing constitutes the shafts' bearing surfaces.
REFERENCES:
patent: 1461047 (1923-07-01), Ray
patent: 5161421 (1992-11-01), Stigsson
patent: 5259135 (1993-11-01), Bannister et al.
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