Patent ID: 7726841
Filing Date: 2010-06-01
Classification: F21K,F21S,F21V,F21W,F21Y,G01S,H04N,Y02B,Y10S

Abstract:
1. A geometric system, comprising: at least one housing-unit having a desired shape with two slide wall channels on each edge to receive a joint-means for joining said housing-units, each slide wall channels having one receiving hole for receiving a contact bar of the joint means; locking means for locking said housing-units and joint-means in fixed relative positions; and gear means in said joint-means for enabling relative movement of said housing-units when said locking means is not applied, wherein at least one of the joint means includes four extractable elastic said contact bars to permit assembly and disassembly of the joint-means to and from a respective receiving hole of the slide wall channels, whereby when said locking means is not applied, a shape, angle, configuration, or construction of the lighting device is freely changeable by a user, and whereby application of the locking means prevents changing of the shape, angle, configuration, or construction of the lighting device.